diff --git a/.gitignore b/.gitignore
index 638d150..97068ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@
 
 # vim swp files
 *.swp
+
+./.vscode/*
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..d0fbac9
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,47 @@
+{
+    "files.associations": {
+        "array": "cpp",
+        "atomic": "cpp",
+        "*.tcc": "cpp",
+        "cctype": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "cstdarg": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "deque": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "exception": "cpp",
+        "algorithm": "cpp",
+        "functional": "cpp",
+        "iterator": "cpp",
+        "memory": "cpp",
+        "memory_resource": "cpp",
+        "numeric": "cpp",
+        "optional": "cpp",
+        "random": "cpp",
+        "string": "cpp",
+        "string_view": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "fstream": "cpp",
+        "initializer_list": "cpp",
+        "iosfwd": "cpp",
+        "iostream": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "new": "cpp",
+        "ostream": "cpp",
+        "sstream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "typeinfo": "cpp"
+    }
+}
\ No newline at end of file
diff --git a/CPP/CRTP/example/Makefile b/CPP/CRTP/example/Makefile
new file mode 100644
index 0000000..578bada
--- /dev/null
+++ b/CPP/CRTP/example/Makefile
@@ -0,0 +1,29 @@
+cpp_src = $(wildcard *.cpp) 
+cpp_src += $(wildcard ./utils/*.cpp)
+cpp_src += $(wildcard ./driver/*.cpp)
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = 
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+
+debug : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -g -o $@ $^ $(LDFLAGS) 
+
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
diff --git a/CPP/CRTP/example/main.cpp b/CPP/CRTP/example/main.cpp
new file mode 100644
index 0000000..0606775
--- /dev/null
+++ b/CPP/CRTP/example/main.cpp
@@ -0,0 +1,148 @@
+#include <memory>
+#include <iostream>
+
+// https://www.modernescpp.com/index.php/c-is-still-lazy
+
+//
+//  CRTP base class of pin
+//
+
+/*
+    avoiding virtual call (static polymorphism)
+*/
+
+template <typename Derived>
+struct PinBase
+{
+    void set(bool logic)
+    {
+        static_cast<Derived*>(this)->setImp(logic);
+    }
+
+    void toggle()
+    {
+        static_cast<Derived*>(this)->toggleImp();
+    }
+
+    bool get(void)
+    {
+        return static_cast<Derived*>(this)->getImp();
+    }
+
+    private:
+
+    //
+    // base implementations
+    //
+
+    void setImp()
+    {
+        std::cout << "base implementation of set()!" << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "base implementation of toggle()!" << std::endl;
+    }
+
+    bool getImp(void)
+    {
+        std::cout << "base implementation of get()!" << std::endl;
+        return true;
+    }
+};
+
+//
+//  implementations
+//
+
+struct STM32_Pin : PinBase<STM32_Pin>
+{
+    STM32_Pin()
+    {
+        std::cout << "created STM32_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        std::cout << "stm32 pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "toggled stm32 pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+
+    void STM32_stuff()
+    {
+        std::cout << "STM_32 specific stuff" << std::endl;
+    }
+};
+
+struct AVR_Pin : PinBase<AVR_Pin>
+{
+    AVR_Pin()
+    {
+        std::cout << "created AVR_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        std::cout << "AVR pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "toggled AVR pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+    void avr_stuff()
+    {
+        std::cout << "AVR specific stuff" << std::endl;
+    }
+};
+
+template<typename T>
+void foo(T& base)
+{
+    base.set(true);
+    base.set(false);
+    base.toggle();
+}
+
+template<typename T>
+void baa(PinBase<T>& pin)
+{
+    pin.toggle();
+    //foo(pin);
+}
+
+int main(void)
+{
+    STM32_Pin pin1;
+    AVR_Pin pin2;
+
+    pin1.STM32_stuff();
+
+    pin2.avr_stuff();
+
+    foo(pin1);
+    foo(pin2);
+
+    baa(pin1);
+
+    while(1);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/CPP/CRTP/example/runtest b/CPP/CRTP/example/runtest
new file mode 100755
index 0000000..6679d54
Binary files /dev/null and b/CPP/CRTP/example/runtest differ
diff --git a/CPP/CRTP/idea.cpp b/CPP/CRTP/idea.cpp
new file mode 100644
index 0000000..7efae06
--- /dev/null
+++ b/CPP/CRTP/idea.cpp
@@ -0,0 +1,204 @@
+#include <memory>
+#include <iostream>
+
+// https://www.modernescpp.com/index.php/c-is-still-lazy
+
+//
+//  CRTP base class of pin
+//
+
+/*
+    avoiding virtual call (static polymorphism)
+*/
+
+struct IPin
+{
+    void set(bool logic);
+    void toggle();
+    bool get();
+};
+
+template <typename Derived>
+struct PinBase : public IPin
+{
+    void set(bool logic)
+    {
+        static_cast<Derived*>(this)->setImp(logic);
+    }
+
+    void toggle()
+    {
+        static_cast<Derived*>(this)->toggleImp();
+    }
+
+    bool get(void)
+    {
+        return static_cast<Derived*>(this)->getImp();
+    }
+
+    private:
+
+    //
+    // base implementations
+    //
+
+    void setImp()
+    {
+        std::cout << "base implementation of set()!" << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "base implementation of toggle()!" << std::endl;
+    }
+
+    bool getImp(void)
+    {
+        std::cout << "base implementation of get()!" << std::endl;
+        return true;
+    }
+};
+
+//
+//  implementations
+//
+
+struct STM32_Pin : PinBase<STM32_Pin>
+{
+    STM32_Pin()
+    {
+        //std::cout << "created STM32_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        //std::cout << "stm32 pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        //std::cout << "toggled stm32 pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+
+    void STM32_stuff()
+    {
+        //std::cout << "STM_32 specific stuff" << std::endl;
+    }
+};
+
+struct AVR_Pin : PinBase<AVR_Pin>
+{
+    AVR_Pin()
+    {
+        a = 3;
+        //std::cout << "created AVR_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        //std::cout << "AVR pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        a = 5;
+        //std::cout << "toggled AVR pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+    void avr_stuff()
+    {
+        a = 10;
+        //std::cout << "AVR specific stuff" << std::endl;
+    }
+    private:
+
+    int a;
+};
+
+template<typename T>
+void foo(T& base)
+{
+    base.set(true);
+    base.set(false);
+    base.toggle();
+}
+
+template<typename T>
+void baa(PinBase<T>& pin)
+{
+    pin.toggle();
+    //foo(pin);
+}
+
+#if 0
+template <typename T>
+struct Driver
+{
+    Driver(PinBase<T>& pin) : pin(pin)
+    {
+        
+    }
+    
+    void doSomething()
+    {
+        pin.toggle();
+    }
+    
+    private:
+    
+    PinBase<T> pin;
+};
+#endif
+
+struct Driver
+{
+    Driver(IPin& pin) : pin(pin)
+    {
+        
+    }
+    
+    void doSomething()
+    {
+        pin.toggle();
+    }
+    
+    private:
+    
+    IPin& pin;
+};
+
+int main(void)
+{
+    //STM32_Pin pin1;
+    AVR_Pin pin2;
+
+
+    //pin1.STM32_stuff();
+
+    pin2.avr_stuff();
+#if 0
+    foo(pin1);
+    foo(pin2);
+
+    baa(pin1);
+    #endif
+    
+    
+    Driver drv(pin2);
+    
+    drv.doSomething();
+    
+
+    return 0;
+}
\ No newline at end of file
diff --git a/CPP/CRTP/infos.txt b/CPP/CRTP/infos.txt
new file mode 100644
index 0000000..cf15738
--- /dev/null
+++ b/CPP/CRTP/infos.txt
@@ -0,0 +1,5 @@
+Curiously recurring template pattern (CRTP)
+
+https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern
+
+https://www.youtube.com/watch?v=7-nHdQjSRe0&t=480s
diff --git a/CPP/multithreading/Makefile b/CPP/multithreading/Makefile
new file mode 100644
index 0000000..fe7ddc7
--- /dev/null
+++ b/CPP/multithreading/Makefile
@@ -0,0 +1,29 @@
+cpp_src = $(wildcard *.cpp) 
+cpp_src += $(wildcard ./utils/*.cpp)
+cpp_src += $(wildcard ./driver/*.cpp)
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = -lpthread
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+
+debug : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -g -o $@ $^ $(LDFLAGS) 
+
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
diff --git a/CPP/multithreading/main.cpp b/CPP/multithreading/main.cpp
new file mode 100644
index 0000000..4fb1da5
--- /dev/null
+++ b/CPP/multithreading/main.cpp
@@ -0,0 +1,77 @@
+#include <iostream>
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string>
+
+pthread_mutex_t print_mtx;
+
+class IThread
+{
+    public:
+
+    private:
+
+    virtual void* _run() = 0;
+
+    static void* _staticRun(void* context)
+    {
+        return static_cast<IThread*>(context)->_run();
+    }
+};
+
+
+
+void printer(std::string a)
+{
+    pthread_mutex_lock(&print_mtx);
+
+    std::cout << a << std::endl;
+
+    pthread_mutex_unlock(&print_mtx);
+}
+
+void* foo(void* arg)
+{
+    unsigned int i = 100;
+    for(;i >  0; i--){
+        std::string a = "foo cnt: ";
+        a += std::to_string(i);
+        printer(a);
+        sleep(1);
+    }
+
+}
+
+void* baa(void* arg)
+{
+    unsigned int i = 5;
+    
+    for(;i >  0; i--){
+        std::string a = "baa cnt: ";
+        a += std::to_string(i);
+        printer(a);
+        sleep(10);
+    }
+}
+
+int main()
+{
+    pthread_t foo_th, baa_th;
+    
+
+    pthread_mutex_init(&print_mtx, NULL);
+
+    pthread_create(&foo_th, NULL, foo, NULL);
+    pthread_create(&baa_th, NULL, baa, NULL);
+
+
+    pthread_join(foo_th, NULL);
+    pthread_join(baa_th, NULL);
+    
+    
+    return 0;
+}
+
diff --git a/CPP/multithreading/runtest b/CPP/multithreading/runtest
new file mode 100755
index 0000000..4ca9068
Binary files /dev/null and b/CPP/multithreading/runtest differ
diff --git a/CPP/register_modeling/.vscode/settings.json b/CPP/register_modeling/.vscode/settings.json
new file mode 100644
index 0000000..d0fbac9
--- /dev/null
+++ b/CPP/register_modeling/.vscode/settings.json
@@ -0,0 +1,47 @@
+{
+    "files.associations": {
+        "array": "cpp",
+        "atomic": "cpp",
+        "*.tcc": "cpp",
+        "cctype": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "cstdarg": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "deque": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "exception": "cpp",
+        "algorithm": "cpp",
+        "functional": "cpp",
+        "iterator": "cpp",
+        "memory": "cpp",
+        "memory_resource": "cpp",
+        "numeric": "cpp",
+        "optional": "cpp",
+        "random": "cpp",
+        "string": "cpp",
+        "string_view": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "fstream": "cpp",
+        "initializer_list": "cpp",
+        "iosfwd": "cpp",
+        "iostream": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "new": "cpp",
+        "ostream": "cpp",
+        "sstream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "typeinfo": "cpp"
+    }
+}
\ No newline at end of file
diff --git a/CPP/register_modeling/example_project/Makefile b/CPP/register_modeling/example_project/Makefile
new file mode 100644
index 0000000..38e5ad5
--- /dev/null
+++ b/CPP/register_modeling/example_project/Makefile
@@ -0,0 +1,24 @@
+cpp_src = $(wildcard *.cpp) 
+cpp_src += $(wildcard ./utils/*.cpp)
+cpp_src += $(wildcard ./driver/*.cpp)
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = 
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+ 
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
diff --git a/CPP/register_modeling/example_project/driver/device.cpp b/CPP/register_modeling/example_project/driver/device.cpp
index 4647a0c..715bf1e 100644
--- a/CPP/register_modeling/example_project/driver/device.cpp
+++ b/CPP/register_modeling/example_project/driver/device.cpp
@@ -1,14 +1,69 @@
 #include "device.hpp"
+#include <iostream>
 
-Device::Device()
+Device::Device() :
+    reg_control(0x00)
 {
-    Reg_Control.POWER_DEV = Reg_Control::POWER_DEV::TURN_OFF;
-    Reg_Control.SPEED = Reg_Control::SPEED::STAND_STILL;
 
-    std::cout << Reg_Control.raw;
+    std::cout << "Device::Device()" << std::endl;
+    std::cout << +reg_control.raw << std::endl;
+
+    reg_control.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_OFF;
+    reg_control.bits.SPEED = Reg_Control::SPEED::STAND_STILL;
+
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " <<+reg_control.bits.SPEED <<  std::endl;
 }
 
 void Device::doSomething()
 {
+    std::cout << "Device::doSomething()" << std::endl;
+
+    reg_control.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    reg_control.bits.SPEED = Reg_Control::SPEED::FAST;
+
+    if(reg_control.bits.POWER_DEV == Reg_Control::POWER_DEV::TURN_ON){
+        std::cout << "device turned on!" << std::endl;
+    }
+
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " << +reg_control.bits.SPEED <<  std::endl;
+     
+    std::cout << +reg_control << std::endl;
+
+    reg_control = 0;
+
+    std::cout << +reg_control << std::endl;
+
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " << +reg_control.bits.SPEED <<  std::endl;
+
+    //reg_control.bits.SPEED = Reg_Control::SPEED::FAST;
+    reg_control.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " << +reg_control.bits.SPEED <<  std::endl;
+
+
+
+    
+}
+
+void Device::status()
+{
+    // imitating read hardware register (for example reading from device via SPI or i2c)
+    reg_motorStatus = 0xFE;
+
+    if(reg_motorStatus.bits.POWER == Reg_MotorStatus::POWER::ON) {
+        std::cout << "Motor is Powered ON!" << std::endl;
+    } else {
+        std::cout << "Motor is Powered OFF!" << std::endl;
+    }
+
+    // will throw error because this bitfield is set const!
+    //reg_motorStatus.bits.STATUS = Reg_MotorStatus::STATUS::STANDSTILL;
+
+    std::cout << +reg_motorStatus.bits.POWER << std::endl;
 
+    std::cout << "Motor Status : " << +reg_motorStatus.bits.STATUS << std::endl;
 }
\ No newline at end of file
diff --git a/CPP/register_modeling/example_project/driver/device.hpp b/CPP/register_modeling/example_project/driver/device.hpp
index 5fd0a01..2f9e1ea 100644
--- a/CPP/register_modeling/example_project/driver/device.hpp
+++ b/CPP/register_modeling/example_project/driver/device.hpp
@@ -1,7 +1,7 @@
 #ifndef _DEVICE_HPP_
 #define _DEVICE_HPP_
 
-#include"../BitField.hpp"
+#include "../utils/BitField.hpp"
 
 #include <iostream>
 #include <stdint.h>
@@ -13,6 +13,8 @@ class Device
 
         void doSomething();
 
+        void status();
+
     private:
 
         //
@@ -44,26 +46,68 @@ class Device
 #endif
         union Reg_Control
         {
-            // bit 7
+            // bit 4
             struct POWER_DEV{
-                typedef Bits<uint8_t, 7, 1> bits;
+                typedef BitField<uint8_t, 7, 1> Bits;
                 enum{TURN_OFF = 0, TURN_ON = 1};
             };
             // bits 2-3
             struct SPEED{
-                typedef Bits<uint8_t, 2, 2> bits;
+                typedef BitField<uint8_t, 2, 2> Bits;
                 enum{STAND_STILL = 0,
                      SLOW = 1,
                      NORMAL = 2,
                      FAST = 3};
             };
             union Bits{
-                Reg_Control::POWER_DEV::bits POWER_DEV;
-                Reg_Control::SPEED::bits SPEED;
+                Reg_Control::POWER_DEV::Bits POWER_DEV;
+                Reg_Control::SPEED::Bits SPEED;
             } bits;
+            // raw value. all bitfields will be "unified" here ;)
+            uint8_t raw;
+            // union Ctor with default value set to 0x00
+            Reg_Control(uint8_t v = 0x00) : raw(v) {}
+            // raw value extraction of register
+            operator uint8_t() {return raw;}
+            // used for updating software immage of hardware register
+            void operator = (uint8_t v) {raw = v;}
+        };
+
+        union Reg_MotorStatus
+        {
+            struct POWER{
+                typedef BitField<uint8_t,0,1> Bits;
+                enum{OFF = 0, ON = 1};
+            };
+            struct STATUS{
+                typedef BitField<uint8_t, 2,3>Bits;
+                enum{STANDSTILL = 0,
+                     ACCELERATING_CW = 1,
+                     DEACCELERATING_CW = 2,
+                     ACCELERATING_CCW = 3,
+                     DEACCELERATING_CCW = 4,
+                     CONSTANT_SPEED = 5,
+                     BLOCKED = 6};
+            };
+            union Bits
+            {
+                // is set const because it only used for status indication
+                const Reg_MotorStatus::POWER::Bits POWER;
+                const Reg_MotorStatus::STATUS::Bits STATUS;
+            }bits;
             uint8_t raw;
+
+            Reg_MotorStatus(uint8_t v = 0x00) : raw(v) {}
+            operator uint8_t() {return raw;}
+            void operator = (uint8_t v) {raw = v;}   
         };
 
+        Reg_Control reg_control;
+
+        Reg_MotorStatus reg_motorStatus;
+
+
+
 };
 
 #endif // _DEVICE_HPP_
diff --git a/CPP/register_modeling/example_project/main.cpp b/CPP/register_modeling/example_project/main.cpp
index ab73c2a..ea510f1 100644
--- a/CPP/register_modeling/example_project/main.cpp
+++ b/CPP/register_modeling/example_project/main.cpp
@@ -1,9 +1,57 @@
 #include <iostream>
+#include <stdint.h>
 
-#include "mcp4725/mcp4725.hpp"
+#include "./driver/device.hpp"
+#include "./utils/BitField.hpp"
+
+#ifdef SIMPLE_TEST
 
 int main(void)
 {
+    std::cout << "test" << std::endl;
+    
+    BitField<uint8_t, 1, 2> bitfield_0;
+    BitField<uint8_t, 5, 2> bitfield_1;
+
+    
+    std::cout << "testing bitfield 0" << std::endl;
+
+    for(uint8_t i = 0; i < 10; i++) {
+
+        bitfield_0 = i;
+        std::cout << static_cast<uint32_t>(bitfield_0()) << std::endl;
+    }
+
+    std::cout << "testing bitfield 1" << std::endl;
+
+    for(uint8_t i = 0; i < 10; i++) {
+
+        bitfield_1 = i;
+        std::cout << static_cast<uint32_t>(bitfield_1()) << std::endl;
+    }
+
+    Device dev();
+
+    return 0;
+}
+
+#endif
+
+
+int main(void)
+{
+    std::cout << "test" << std::endl;
+    
+    //std::cout << std::hex << ((1ULL << 2)-1) << std::endl;
+    std::cout << 1ULL << std::endl;
+
+    Device dev;
+
+    //dev.doSomething();
+
+    dev.status();
+
+    //dev.doSomething();
 
     return 0;
-}
\ No newline at end of file
+}
diff --git a/CPP/register_modeling/example_project/mcp4725/mcp4725.cpp b/CPP/register_modeling/example_project/mcp4725/mcp4725.cpp
deleted file mode 100644
index 96c3e17..0000000
--- a/CPP/register_modeling/example_project/mcp4725/mcp4725.cpp
+++ /dev/null
@@ -1,124 +0,0 @@
-#include "mcp4725.hpp"
-
-#if 0
-MCP4725::MCP4725(pwrd_md power_down_mode,
-		 i2c_addr address,
-		 I2C* i2c) :
-			power_down_mode(power_down_mode),
-			address(address),
-			i2c(i2c),
-			dac_value(0),
-			eeprom_value(0)
-
-
-{
-	uint8_t temp[6];
-
-      	temp[0] = cmd_write_dac_and_eeprom | (power_down_mode << 1);
-     	temp[1] = static_cast<uint8_t>(dac_value >> 4);
-     	temp[2] = static_cast<uint8_t>(dac_value << 4);
-	temp[3] = temp[0];
-	temp[4] = temp[1];
-	temp[5] = temp[2];
-
-	//i2c_write(address, temp,6);
-}
-
-MCP4725::MCP4725(i2c_addr address,
-		 I2C* i2c) :
-			power_down_mode(pwrd_md::normal),
-			address(address),
-			i2c(i2c),
-			dac_value(0),
-			eeprom_value(0)
-
-{	
-	uint8_t temp[6];
-
-      	temp[0] = cmd_write_dac_and_eeprom | (power_down_mode << 1);
-     	temp[1] = static_cast<uint8_t>(dac_value >> 4);
-     	temp[2] = static_cast<uint8_t>(dac_value << 4);
-	temp[3] = temp[0];
-	temp[4] = temp[1];
-	temp[5] = temp[2];
-
-	//i2c_write(address, temp, 6);
-}
-#endif
-
-MCP4725::MCP4725()
-{
-
-}
-
-MCP4725::MCP4725(I2C* i2c) :
-			power_down_mode(pwrd_md::normal),
-			address(addr_0x60),
-			i2c(i2c),
-			dac_value(0),
-			eeprom_value(0)
-
-{	
-	uint8_t temp[6];
-
-      	temp[0] = cmd_write_dac_and_eeprom | (power_down_mode << 1);
-     	temp[1] = static_cast<uint8_t>(dac_value >> 4);
-     	temp[2] = static_cast<uint8_t>(dac_value << 4);
-	temp[3] = temp[0];
-	temp[4] = temp[1];
-	temp[5] = temp[2];
-
-	i2c->writeBuffer(address, temp, 6);
-}
-
-//MCP4725::~MCP4725()
-//{
-
-//}
-
-void MCP4725::operator=(uint16_t dac_value)
-{
-	uint8_t temp[3];
-	this->dac_value = dac_value;
-	
-	temp[0] = cmd_write_dac | (power_down_mode << 1);
-	temp[1] = static_cast<uint8_t>(dac_value >> 4);
-	temp[2] = static_cast<uint8_t>(dac_value << 4);
-
-
-	i2c->writeBuffer(address, temp, 3);
-
-	//i2c_write(address, temp, 3);
-}
-
-
-
-void MCP4725::operator==(uint16_t dac_and_eeprom_value)
-{
-	uint8_t temp[6];
-	dac_value = dac_and_eeprom_value;
-	eeprom_value = dac_value;
-
-	temp[0] = cmd_write_dac_and_eeprom | (power_down_mode << 1); 
-	temp[1] = static_cast<uint8_t>(dac_and_eeprom_value >> 4);
-	temp[2] = static_cast<uint8_t>(dac_and_eeprom_value << 4);
-	temp[3] = temp[0];
-	temp[4] = temp[1];
-	temp[5] = temp[2];
-	
-	i2c->writeBuffer(address, temp, 6);
-}
-
-#if 0
-
-void MCP4725::write_dac(uint16_t dac_value)
-{
-	&this = dac_value;
-}
-
-void MCP4725::write_dac_and_eeprom(uint16_t dac_and_eeprom_value)
-{
-	&this == dac_and_eeprom_value;
-}
-
-#endif
diff --git a/CPP/register_modeling/example_project/mcp4725/mcp4725.hpp b/CPP/register_modeling/example_project/mcp4725/mcp4725.hpp
deleted file mode 100644
index dbd3922..0000000
--- a/CPP/register_modeling/example_project/mcp4725/mcp4725.hpp
+++ /dev/null
@@ -1,100 +0,0 @@
-#ifndef _MCP4725_HPP_
-#define _MCP4725_HPP_
-
-#include <stdint.h>
-#include <unistd.h>
-#include <functional>
-#include "../../communication/i2c/i2c.hpp"
-
-class MCP4725
-{
-	public:
-		//typedef std::function<void(uint8_t,uint8_t*,uint8_t)> i2c_write_n_t;
-		//typedef std::function<void(const uint8_t&,const uint8_t*,const uint8_t&)> i2c_write_n_t;
-		//typedef void(*i2c_write_n_t)(const uint8_t&, const uint8_t*, const uint8_t&);
-	
-		//typedef std::function<void(int)>i2c_write_n_t;
-
-		// address list
-		enum i2c_addr
-		{
-			addr_0x60 = 0b01100000,
-			addr_0x61 = addr_0x60 + 1,
-			addr_0x62 = addr_0x60 + 2,
-			addr_0x63 = addr_0x60 + 3,
-			addr_0x64 = addr_0x60 + 4,
-			addr_0x65 = addr_0x60 + 5,
-			addr_0x66 = addr_0x60 + 6,
-			addr_0x67 = addr_0x60 + 7
-		};
-
-		// power down impedance  modes
-		enum pwrd_md
-		{
-			normal = 0x04,
-			ohm_1k = 0x01,
-			ohm_100k = 0x02,
-			ohm_500k = 0x03
-		};
-
-		//using std::functional<uint8_t(uint8_t, uint8_t)> i2c_read_n_t;
-
-		//using i2c_write_n_t = std::functional<void(uint8_t, uint8_t*,uint8_t)>;
-		
-		/**
-		 * @brief Constructor of mcp4725 dac
-		 * 
-		 * @param power_down_mode pwrd_md power down mode
-		 * @param address i2c_addr i2c address of the dac
-		 * @param i2c_write i2c_write_n_t callback for i2c writ
-		 */
-#if 0
-		MCP4725(pwrd_md power_down_mode,
-			i2c_addr address,
-			I2C* i2c);
-
-		MCP4725(i2c_addr address,
-			I2C* i2c);
-#endif
-
-		MCP4725();
-		MCP4725(I2C* i2c);
-
-	//	~MCP4725();
-	
-
-
-		void operator=(uint16_t dac_value);
-
-		void operator==(uint16_t dac_and_eeprom_value);
-
-#if 0		
-		void write_dac_and_eeprom(uint16_t value);
-
-		void set_powerdown_impedance(pwrd_md mode);
-
-		i2c_addr get_i2c_addr();
-#endif
-		//void set_power
-		
-
-	private:
-
-		enum commands_t
-		{
-			cmd_fast_mode = 0x00,
-			cmd_write_dac = 0x40,
-			cmd_write_dac_and_eeprom = 0x60
-		};
-
-		I2C* i2c;
-
-		i2c_addr address;
-		pwrd_md power_down_mode;
-		//i2c_write_n_t i2c_write;
-		uint16_t dac_value;
-		uint16_t eeprom_value;
-
-};
-
-#endif // _MCP4725_HPP_
diff --git a/CPP/register_modeling/example_project/problem_test.txt b/CPP/register_modeling/example_project/problem_test.txt
new file mode 100644
index 0000000..ed7d1ee
--- /dev/null
+++ b/CPP/register_modeling/example_project/problem_test.txt
@@ -0,0 +1,126 @@
+// Example program
+#include <iostream>
+#include <string>
+
+
+#include <stdint.h>
+
+/**
+ * @brief Template class for portable Bitfields
+ * 
+ * @tparam T type of variable in which the bitfield resides
+ * @tparam START bit index starting from LSB where the bitfield starts
+ * @tparam SIZE number of bits
+ */
+template<typename T, uint8_t START, uint8_t SIZE>
+struct BitField
+{   
+    /**
+     * @brief Construct a new Bit Field object
+     * 
+     */
+    BitField()
+    {
+        static_assert(SIZE != 0, "Bitfield SIZE must be > 0!");
+		static_assert(START < sizeof(T) * 8, "START exceeds number of bits of the chosen typename T!");
+    }
+    
+    /**
+     * @brief assignment operator
+     * 
+     * @param v value to be written in the bitfield
+     * @return BitField&
+     */
+    BitField& operator =(T v)
+    {
+
+#if 0
+        _raw = ((v & ((1ULL << SIZE)-1)) << START);
+        return *this;
+#else
+        //_raw & ~(((1ULL << SIZE)-1) << START);
+        
+        // use bit band alias if system permits
+        _raw = ((v & ((1ULL << SIZE)-1)) << START) | (_raw & ~(((1ULL << SIZE)-1) << START));
+        return *this;
+        //#endif
+#endif
+    }
+    
+    /**
+     * @brief return the value inside the bitfield
+     * 
+     * @return T 
+     */
+    operator T() const
+    {
+        return _raw >> START;
+    }
+    
+    /**
+     * @brief return the raw value
+     * 
+     * @return T 
+     */
+    T operator ()() const
+    {
+        return _raw;
+    }
+    
+    private:
+    T _raw;
+};
+
+union Reg_Control
+{
+    // bit 4
+    struct POWER_DEV{
+        typedef BitField<uint8_t, 7, 1> Bits;
+        enum{TURN_OFF = 0, TURN_ON = 1};
+    };
+    // bits 2-3
+    struct SPEED{
+        typedef BitField<uint8_t, 0, 2> Bits;
+        enum{STAND_STILL = 0,
+             SLOW = 1,
+             NORMAL = 2,
+             FAST = 3};
+    };
+    union Bits{
+        Reg_Control::POWER_DEV::Bits POWER_DEV;
+        Reg_Control::SPEED::Bits SPEED;
+    } bits;
+    // raw value. all bitfields will be "unified" here ;)
+    uint8_t raw;
+    // union Ctor with default value set to 0x00
+    Reg_Control(uint8_t v = 0x00) : raw(v) {}
+};
+
+
+
+int main()
+{
+    Reg_Control reg;
+    
+    //reg.bits.SPEED = Reg_Control::SPEED::FAST;
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    
+    
+    std::cout << +reg.raw << std::endl;
+    
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_OFF;
+    
+    std::cout << +reg.raw << std::endl;
+    
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    reg.bits.SPEED = Reg_Control::SPEED::SLOW;
+    
+    std::cout << +reg.raw << std::endl;
+    
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_OFF;
+    reg.bits.SPEED = Reg_Control::SPEED::FAST;
+    
+    std::cout << +reg.raw << std::endl;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/CPP/register_modeling/example_project/runtest b/CPP/register_modeling/example_project/runtest
new file mode 100755
index 0000000..5dfe56a
Binary files /dev/null and b/CPP/register_modeling/example_project/runtest differ
diff --git a/CPP/register_modeling/example_project/BitField.hpp b/CPP/register_modeling/example_project/utils/BitField.hpp
similarity index 81%
rename from CPP/register_modeling/example_project/BitField.hpp
rename to CPP/register_modeling/example_project/utils/BitField.hpp
index c3431dd..7b36c16 100644
--- a/CPP/register_modeling/example_project/BitField.hpp
+++ b/CPP/register_modeling/example_project/utils/BitField.hpp
@@ -14,6 +14,9 @@
 // https://stackoverflow.com/questions/31726191/is-there-a-portable-alternative-to-c-bitfields
 // https://stackoverflow.com/questions/1392059/algorithm-to-generate-bit-mask
 
+#ifndef _BITFIELDS_HPP_
+#define _BITFIELDS_HPP_
+
 #include <stdint.h>
 
 /**
@@ -44,8 +47,8 @@ struct BitField
      */
     BitField& operator =(T v)
     {
-        // mask creation for v : https://stackoverflow.com/questions/1392059/algorithm-to-generate-bit-mask
-        _raw = ((v & ((1ULL << SIZE)-1)) << START) ;
+        // use bit band alias if system permits
+        _raw = ((v & ((1ULL << SIZE)-1)) << START) | (_raw & ~(((1ULL << SIZE)-1) << START));
         return *this;
     }
     
@@ -56,7 +59,7 @@ struct BitField
      */
     operator T() const
     {
-        return _raw >> START;
+        return (_raw >> START) & ((1ULL << SIZE) - 1);
     }
     
     /**
@@ -66,9 +69,11 @@ struct BitField
      */
     T operator ()() const
     {
-        return _raw;
+        return (_raw >> START) & ((1ULL << SIZE) - 1);
     }
     
     private:
     T _raw;
 };
+
+#endif // _BITFIELDS_HPP_
\ No newline at end of file
diff --git a/CPP/register_modeling/example_with_STM32_GPIO/Makefile b/CPP/register_modeling/example_with_STM32_GPIO/Makefile
new file mode 100644
index 0000000..38e5ad5
--- /dev/null
+++ b/CPP/register_modeling/example_with_STM32_GPIO/Makefile
@@ -0,0 +1,24 @@
+cpp_src = $(wildcard *.cpp) 
+cpp_src += $(wildcard ./utils/*.cpp)
+cpp_src += $(wildcard ./driver/*.cpp)
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = 
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+ 
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
diff --git a/CPP/register_modeling/example_with_STM32_GPIO/main.cpp b/CPP/register_modeling/example_with_STM32_GPIO/main.cpp
new file mode 100644
index 0000000..1a2f615
--- /dev/null
+++ b/CPP/register_modeling/example_with_STM32_GPIO/main.cpp
@@ -0,0 +1,105 @@
+#include <iostream>
+#include <stdint.h>
+
+#include "utils/BitField.hpp"
+
+
+
+union GPIO_MODER
+{
+    struct MODER{
+        enum{
+            INPUT_MODE,
+            OUTPUT,
+            ALT_FUNCTION,
+            ANALOG
+        };
+    };
+
+    struct MODER_0 : public MODER{
+        typedef BitField<uint32_t, 0, 2> Bits;
+    };
+    struct MODER_1 : public MODER{
+        typedef BitField<uint32_t, 2, 2> Bits;
+    };
+    struct MODER_2 : public MODER{
+        typedef BitField<uint32_t, 4, 2> Bits;
+    };
+    struct MODER_3 : public MODER{
+        typedef BitField<uint32_t, 6, 2> Bits;
+    };
+    struct MODER_4 : public MODER{
+        typedef BitField<uint32_t, 8, 2> Bits;
+    };
+    struct MODER_5 : public MODER{
+        typedef BitField<uint32_t, 10, 2> Bits;
+    };
+    struct MODER_6 : public MODER{
+        typedef BitField<uint32_t, 12, 2> Bits;
+    };
+    struct MODER_7 : public MODER{
+        typedef BitField<uint32_t, 14, 2> Bits;
+    };
+    struct MODER_8 : public MODER{
+        typedef BitField<uint32_t, 16, 2> Bits;
+    };
+    struct MODER_9 : public MODER{
+        typedef BitField<uint32_t, 18, 2> Bits;
+    };
+    struct MODER_10 : public MODER{
+        typedef BitField<uint32_t, 20, 2> Bits;
+    };
+    struct MODER_11 : public MODER{
+        typedef BitField<uint32_t, 22, 2> Bits;
+    };
+    struct MODER_12 : public MODER{
+        typedef BitField<uint32_t, 24, 2> Bits;
+    };
+    struct MODER_13 : public MODER{
+        typedef BitField<uint32_t, 26, 2> Bits;
+    };
+    struct MODER_14 : public MODER{
+        typedef BitField<uint32_t, 28, 2> Bits;
+    };
+    struct MODER_15 : public MODER{
+        typedef BitField<uint32_t, 30, 2> Bits;
+    };
+    union{
+        GPIO_MODER::MODER_0::Bits MODER_0;
+        GPIO_MODER::MODER_1::Bits MODER_1;
+        GPIO_MODER::MODER_2::Bits MODER_2;
+        GPIO_MODER::MODER_3::Bits MODER_3;
+        GPIO_MODER::MODER_4::Bits MODER_4;
+        GPIO_MODER::MODER_5::Bits MODER_5;
+        GPIO_MODER::MODER_6::Bits MODER_6;
+        GPIO_MODER::MODER_7::Bits MODER_7;
+        GPIO_MODER::MODER_8::Bits MODER_8;
+        GPIO_MODER::MODER_9::Bits MODER_9;
+        GPIO_MODER::MODER_10::Bits MODER_10;
+        GPIO_MODER::MODER_11::Bits MODER_11;
+        GPIO_MODER::MODER_12::Bits MODER_12;
+        GPIO_MODER::MODER_13::Bits MODER_13;
+        GPIO_MODER::MODER_14::Bits MODER_14;
+        GPIO_MODER::MODER_15::Bits MODER_15;
+    }bits;
+
+    uint32_t raw;
+
+    GPIO_MODER(uint32_t v = 0x00) : raw(v) {}
+    operator uint32_t() {return raw;}
+    void operator = (uint32_t v) {raw = v;}  
+};
+
+int main(void)
+{
+    GPIO_MODER MODER_A;
+
+    //  for reference use the STM32F0 reference manualchapter GPIO
+
+    MODER_A.bits.MODER_0 = GPIO_MODER::MODER_0::OUTPUT;
+    MODER_A.bits.MODER_5 = GPIO_MODER::MODER_5::ALT_FUNCTION;
+
+    std::cout << +MODER_A << std::endl;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/CPP/register_modeling/example_with_STM32_GPIO/runtest b/CPP/register_modeling/example_with_STM32_GPIO/runtest
new file mode 100755
index 0000000..6aa3385
Binary files /dev/null and b/CPP/register_modeling/example_with_STM32_GPIO/runtest differ
diff --git a/CPP/register_modeling/example_with_STM32_GPIO/utils/BitField.hpp b/CPP/register_modeling/example_with_STM32_GPIO/utils/BitField.hpp
new file mode 100644
index 0000000..7b36c16
--- /dev/null
+++ b/CPP/register_modeling/example_with_STM32_GPIO/utils/BitField.hpp
@@ -0,0 +1,79 @@
+/**
+ * @file BitField.h
+ * @author Edwin Koch (eddyed.k@gmail.com)
+ * @brief 
+ * @version 0.1
+ * @date 2020-12-19
+ * 
+ * @copyright Copyright (c) 2020
+ * 
+ */
+
+// Based on:
+// https://www.youtube.com/watch?v=TYqbgvHfxjM
+// https://stackoverflow.com/questions/31726191/is-there-a-portable-alternative-to-c-bitfields
+// https://stackoverflow.com/questions/1392059/algorithm-to-generate-bit-mask
+
+#ifndef _BITFIELDS_HPP_
+#define _BITFIELDS_HPP_
+
+#include <stdint.h>
+
+/**
+ * @brief Template class for portable Bitfields
+ * 
+ * @tparam T type of variable in which the bitfield resides
+ * @tparam START bit index starting from LSB where the bitfield starts
+ * @tparam SIZE number of bits
+ */
+template<typename T, uint8_t START, uint8_t SIZE>
+struct BitField
+{   
+    /**
+     * @brief Construct a new Bit Field object
+     * 
+     */
+    BitField()
+    {
+        static_assert(SIZE != 0, "Bitfield SIZE must be > 0!");
+		static_assert(START < sizeof(T) * 8, "START exceeds number of bits of the chosen typename T!");
+    }
+    
+    /**
+     * @brief assignment operator
+     * 
+     * @param v value to be written in the bitfield
+     * @return BitField&
+     */
+    BitField& operator =(T v)
+    {
+        // use bit band alias if system permits
+        _raw = ((v & ((1ULL << SIZE)-1)) << START) | (_raw & ~(((1ULL << SIZE)-1) << START));
+        return *this;
+    }
+    
+    /**
+     * @brief return the value inside the bitfield
+     * 
+     * @return T 
+     */
+    operator T() const
+    {
+        return (_raw >> START) & ((1ULL << SIZE) - 1);
+    }
+    
+    /**
+     * @brief return the raw value
+     * 
+     * @return T 
+     */
+    T operator ()() const
+    {
+        return (_raw >> START) & ((1ULL << SIZE) - 1);
+    }
+    
+    private:
+    T _raw;
+};
+
+#endif // _BITFIELDS_HPP_
\ No newline at end of file
diff --git a/CPP/register_modeling/portable_bitfields/BitField.h b/CPP/register_modeling/portable_bitfields/BitField.h
index c3431dd..a826b6c 100644
--- a/CPP/register_modeling/portable_bitfields/BitField.h
+++ b/CPP/register_modeling/portable_bitfields/BitField.h
@@ -45,7 +45,8 @@ struct BitField
     BitField& operator =(T v)
     {
         // mask creation for v : https://stackoverflow.com/questions/1392059/algorithm-to-generate-bit-mask
-        _raw = ((v & ((1ULL << SIZE)-1)) << START) ;
+        //_raw = ((v & ((1ULL << SIZE)-1)) << START) ;
+        _raw = ((v & ((1ULL << SIZE)-1)) << START) | (_raw & ~(((1ULL << SIZE)-1) << START));
         return *this;
     }
     
@@ -56,7 +57,12 @@ struct BitField
      */
     operator T() const
     {
-        return _raw >> START;
+        //return 0;
+        return 0;
+
+        //return (_raw >> START) & ((1ULL << SIZE)-1);
+        //return (_raw >> START) & ((1ULL << SIZE)-1);
+        //return (_raw & (((1ULL << SIZE)-1) << START)) >> START;
     }
     
     /**
@@ -66,7 +72,10 @@ struct BitField
      */
     T operator ()() const
     {
-        return _raw;
+        //return _raw;
+
+        return 0;
+        //return (_raw >> START)  & ((1ULL << SIZE)-1);
     }
     
     private:
diff --git a/CodeTutorials/300-FSM/00-Zustandsbasierte_Systeme.pdf b/CodeTutorials/300-FSM/00-Zustandsbasierte_Systeme.pdf
new file mode 100644
index 0000000..61fb7e1
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diff --git a/CodeTutorials/300-FSM/10-Statecharts(Marwedel).pdf b/CodeTutorials/300-FSM/10-Statecharts(Marwedel).pdf
new file mode 100644
index 0000000..81d6b7e
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diff --git a/CodeTutorials/300-FSM/20-Harel_Statecharts.pdf b/CodeTutorials/300-FSM/20-Harel_Statecharts.pdf
new file mode 100644
index 0000000..8879160
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diff --git a/CodeTutorials/320-FSM_Realisierung/00-FSM-Realisierung.pdf b/CodeTutorials/320-FSM_Realisierung/00-FSM-Realisierung.pdf
new file mode 100644
index 0000000..eea281d
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diff --git a/CodeTutorials/320-FSM_Realisierung/10-FSM-Realisierung.pdf b/CodeTutorials/320-FSM_Realisierung/10-FSM-Realisierung.pdf
new file mode 100644
index 0000000..8beb42d
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diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counter.c b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counter.c
new file mode 100644
index 0000000..34867eb
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counter.c
@@ -0,0 +1,31 @@
+//
+// counter.c
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2019
+//
+
+#include "counter.h"
+
+static int countValue;
+
+void cnt_init(int val)
+{
+  countValue = val;
+}
+
+void cnt_count(int step)
+{
+  countValue += step;
+}
+
+int cnt_getCounter()
+{
+  return countValue;
+}
+
+void cnt_setCounter(int val)
+{
+  countValue = val;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counter.h b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counter.h
new file mode 100644
index 0000000..7c4b9a9
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counter.h
@@ -0,0 +1,24 @@
+//
+// counter.h
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2019
+//
+
+#ifndef COUNTER_H__
+#define COUNTER_H__
+
+void cnt_init(int val);
+// initializes counter to val
+
+void cnt_count(int step);
+// counts the counter up (step>0) or down (step<0) by step
+
+int cnt_getCounter();
+// returns the counter value
+
+void cnt_setCounter(int val);
+// sets the counter to val
+
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterCtrl.c b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterCtrl.c
new file mode 100644
index 0000000..53f1288
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterCtrl.c
@@ -0,0 +1,91 @@
+//
+// counterCtrl.c
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2019
+//
+
+#include <stdio.h>
+#include "counterCtrl.h"
+#include "counter.h"
+
+typedef enum {idleState,        // idle state
+              countUpState,     // counting up at each count event
+              countDownState}   // counting down at each count event
+             State;
+
+static State currentState = idleState; // holds the current state of the FSM
+
+void cnt_ctrlInit(int initValue)
+{
+  currentState = idleState;
+  cnt_init(initValue);
+}
+
+
+void cnt_ctrlProcess(cnt_Event e)
+{
+  switch (currentState)
+  {
+    case idleState:
+      printf("State: idleState\n");
+      if (cnt_evUp == e)
+      {
+        // actions
+        printf("State: idleState, counter = %d\n", cnt_getCounter());
+        // state transition
+        printf("Changing to State: countUpState\n");
+        currentState = countUpState;
+      }
+      else if (cnt_evDown == e)
+      {
+        // actions
+        printf("State: idleState, counter = %d\n", cnt_getCounter());
+        // state transition
+        printf("Changing to State: countDownState\n");
+        currentState = countDownState;
+      }
+      break;
+      
+    case countUpState:
+      printf("State: countUpState\n");
+      if (cnt_evCount == e)
+      {
+        // actions
+        cnt_count(1);
+        printf("State: countUpState, counter = %d\n", cnt_getCounter());
+        // state transition
+      }
+      else if (cnt_evStop == e)
+      {
+        // actions
+        // state transition
+        printf("Changing to State: idleState\n");
+        currentState = idleState;
+      }
+      break;
+      
+    case countDownState:
+      printf("State: countDownState\n");
+      if (cnt_evCount == e)
+      {
+        // actions
+        cnt_count(-1);
+        printf("State: countDownState, counter = %d\n", cnt_getCounter());
+        // state transition
+      }
+      else if (cnt_evStop == e)
+      {
+        // actions
+        // state transition
+        printf("Changing to State: idleState\n");
+        currentState = idleState;
+      }
+      break;
+      
+    default:
+      break;
+  }
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterCtrl.h b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterCtrl.h
new file mode 100644
index 0000000..e369bef
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterCtrl.h
@@ -0,0 +1,25 @@
+//
+// counterCtrl.h
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2019
+//
+
+#ifndef COUNTERCTRL_H__
+#define COUNTERCTRL_H__
+
+typedef enum {cnt_evUp,       // count upwards
+              cnt_evDown,     // count downwards
+              cnt_evCount,    // count (up or down)
+              cnt_evStop}     // stop counting
+             cnt_Event;
+
+void cnt_ctrlInit(int initValue);
+// initializes counter FSM
+
+void cnt_ctrlProcess(cnt_Event e);
+// changes the state of the FSM based on the event 'e'
+// starts the actions
+
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest
new file mode 100644
index 0000000..f9aa282
Binary files /dev/null and b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest differ
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest.c b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest.c
new file mode 100644
index 0000000..7d5d327
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest.c
@@ -0,0 +1,53 @@
+//
+// counterTest.c
+//
+// Test program for the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2019
+//
+
+#include <stdio.h>
+#include "counterCtrl.h"
+
+int main(void)
+{
+  char answer;
+  
+  cnt_ctrlInit(0);
+  
+  do
+  {
+    printf("\n-------------------------------------------\n");
+    printf("    u   Count up\n");
+    printf("    d   Count down\n");
+    printf("    c   Count\n");
+    printf("    s   Stop counting\n");
+    printf("    q   Quit\n");
+
+    printf("\nPlease press key: ");
+    scanf("%c", &answer);
+    getchar();  // nach scanf() ist noch ein '\n' im Inputbuffer: auslesen und wegwerfen
+    printf("\n");
+    
+    switch (answer)
+    {
+      case 'u':
+        cnt_ctrlProcess(cnt_evUp);
+        break;
+      case 'd':
+        cnt_ctrlProcess(cnt_evDown);
+        break;
+      case 'c':
+        cnt_ctrlProcess(cnt_evCount);
+        break;
+      case 's':
+        cnt_ctrlProcess(cnt_evStop);
+        break;
+      default:
+        break;
+    }
+  } while (answer != 'q');
+  
+  return 0;
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest.c~ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest.c~
new file mode 100644
index 0000000..a3a2611
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/counterTest.c~
@@ -0,0 +1,53 @@
+//
+// counterTest.c
+//
+// Test program for the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2014
+//
+
+#include <stdio.h>
+#include "counterCtrl.h"
+
+int main(void)
+{
+  char answer;
+  
+  cntCtrlInit(0);
+  
+  do
+  {
+    printf("\n-------------------------------------------\n");
+    printf("    u   Count up\n");
+    printf("    d   Count down\n");
+    printf("    c   Count\n");
+    printf("    s   Stop counting\n");
+    printf("    q   Quit\n");
+
+    printf("\nPlease press key: ");
+    scanf("%c", &answer);
+//    getchar();  // nach scanf() ist noch ein '\n' im Inputbuffer: auslesen und wegwerfen
+    printf("\n");
+    
+    switch (answer)
+    {
+      case 'u':
+        cntCtrlProcess(cntEvUp);
+        break;
+      case 'd':
+        cntCtrlProcess(cntEvDown);
+        break;
+      case 'c':
+        cntCtrlProcess(cntEvCount);
+        break;
+      case 's':
+        cntCtrlProcess(cntEvStop);
+        break;
+      default:
+        break;
+    }
+  } while (answer != 'q');
+  
+  return 0;
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/makefile b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/makefile
new file mode 100644
index 0000000..6818838
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_C/makefile
@@ -0,0 +1,29 @@
+#
+# Makefile fuer Counter-Programm
+# File: makefile
+# Reto Bonderer, 24.11.2010
+#
+CC = gcc
+LINK = gcc
+# '-pedantic' sorgt dafuer, dass gcc streng arbeitet
+#CFLAGS = -c -pedantic
+#LFLAGS = -pedantic
+CFLAGS = -c -Wall
+LFLAGS = -Wall
+OBJS = counter.o counterCtrl.o counterTest.o
+EXE = counterTest
+
+$(EXE): $(OBJS)
+	$(LINK) $(LFLAGS) -o $(EXE) $(OBJS)
+
+counterTest.o: counterTest.c counterCtrl.h
+	$(CC) $(CFLAGS) counterTest.c
+
+counter.o: counter.c counter.h
+	$(CC) $(CFLAGS) counter.c
+
+counterCtrl.o: counterCtrl.c counterCtrl.h counter.h
+	$(CC) $(CFLAGS) counterCtrl.c
+
+clean:
+	rm -f $(EXE) $(OBJS)
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/Counter.cpp b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/Counter.cpp
new file mode 100644
index 0000000..2054287
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/Counter.cpp
@@ -0,0 +1,28 @@
+//
+// Counter.cpp
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include "Counter.h"
+
+Counter::Counter(int val): countValue(val)
+{
+}
+
+void Counter::count(int step)
+{
+  countValue += step;
+}
+
+int Counter::getCounter() const
+{
+  return countValue;
+}
+
+void Counter::setCounter(int val)
+{
+  countValue = val;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/Counter.h b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/Counter.h
new file mode 100644
index 0000000..a00c2b7
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/Counter.h
@@ -0,0 +1,29 @@
+//
+// Counter.h
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#ifndef COUNTER_H__
+#define COUNTER_H__
+
+class Counter
+{
+  public:
+    Counter(int val = 0);
+
+    void count(int step);
+    // counts the counter up (step>0) or down (step<0) by step
+
+    int getCounter() const;
+    // returns the counter value
+
+    void setCounter(int val);
+    // sets the counter to val
+  private:
+    int countValue;
+};
+
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/CounterCtrl.cpp b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/CounterCtrl.cpp
new file mode 100644
index 0000000..679258c
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/CounterCtrl.cpp
@@ -0,0 +1,84 @@
+//
+// CounterCtrl.cpp
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+#include "Counter.h"
+using namespace std;
+
+CounterCtrl::CounterCtrl(int initValue) : 
+  currentState(idleState),
+  myCounter(initValue)
+{
+}
+
+void CounterCtrl::process(Event e)
+{
+  switch (currentState)
+  {
+    case idleState:
+      cout << "State: idleState" << endl;
+      if (evUp == e)
+      {
+        // actions
+        cout << "State: idleState, counter = " << myCounter.getCounter() << endl;
+        // state transition
+        cout << "Changing to State: countUpState" << endl;
+        currentState = countUpState;
+      }
+      else if (evDown == e)
+      {
+        // actions
+        cout << "State: idleState, counter = " << myCounter.getCounter() << endl;
+        // state transition
+        cout << "Changing to State: countDownState" << endl;
+        currentState = countDownState;
+      }
+      break;
+      
+    case countUpState:
+      cout << "State: countUpState" << endl;
+      if (evCount == e)
+      {
+        // actions
+        myCounter.count(1);
+        cout << "State: countUpState, counter = " << myCounter.getCounter() << endl;
+        // state transition
+      }
+      else if (evStop == e)
+      {
+        // actions
+        // state transition
+        cout << "Changing to State: idleState" << endl;
+        currentState = idleState;
+      }
+      break;
+      
+    case countDownState:
+      cout << "State: countDownState" << endl;
+      if (evCount == e)
+      {
+        // actions
+        myCounter.count(-1);
+        cout << "State: countDownState, counter = " << myCounter.getCounter() << endl;
+        // state transition
+      }
+      else if (evStop == e)
+      {
+        // actions
+        // state transition
+        cout << "Changing to State: idleState" << endl;
+        currentState = idleState;
+      }
+      break;
+      
+    default:
+      break;
+  }
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/CounterCtrl.h b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/CounterCtrl.h
new file mode 100644
index 0000000..4ad29c8
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/CounterCtrl.h
@@ -0,0 +1,33 @@
+//
+// CounterCtrl.h
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#ifndef COUNTERCTRL_H__
+#define COUNTERCTRL_H__
+#include "Counter.h"
+
+class CounterCtrl
+{
+  public:
+    enum Event{evUp,       // count upwards
+               evDown,     // count downwards
+               evCount,    // count (up or down)
+               evStop};    // stop counting
+    CounterCtrl(int initValue = 0);
+    void process(Event e);
+    // changes the state of the FSM based on the event 'e'
+    // starts the actions
+
+  private:
+    enum State{idleState,        // idle state
+               countUpState,     // counting up at each count event
+               countDownState};  // counting down at each count event
+
+    State currentState;          // holds the current state of the FSM
+    Counter myCounter;
+};
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest
new file mode 100644
index 0000000..d210c9b
Binary files /dev/null and b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest differ
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest.cpp b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest.cpp
new file mode 100644
index 0000000..ac3ba85
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest.cpp
@@ -0,0 +1,52 @@
+//
+// counterTest.cpp
+//
+// Test program for the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+using namespace std;
+
+int main(void)
+{
+  char answer;
+  CounterCtrl myFsm(0);  // initValue of counter == 0
+  
+  do
+  {
+    cout << endl << "-------------------------------------------" << endl;
+    cout << "    u   Count up" << endl;
+    cout << "    d   Count down" << endl;
+    cout << "    c   Count" << endl;
+    cout << "    s   Stop counting" << endl;
+    cout << "    q   Quit" << endl;
+
+    cout << endl << "Please press key: ";
+    cin >> answer;
+    cout << endl;
+    
+    switch (answer)
+    {
+      case 'u':
+        myFsm.process(CounterCtrl::evUp);
+        break;
+      case 'd':
+        myFsm.process(CounterCtrl::evDown);
+        break;
+      case 'c':
+        myFsm.process(CounterCtrl::evCount);
+        break;
+      case 's':
+        myFsm.process(CounterCtrl::evStop);
+        break;
+      default:
+        break;
+    }
+  } while (answer != 'q');
+  
+  return 0;
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest.exe b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest.exe
new file mode 100644
index 0000000..a5ebdaa
Binary files /dev/null and b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/counterTest.exe differ
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/makefile b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/makefile
new file mode 100644
index 0000000..2bea153
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Ctrl_Cpp/makefile
@@ -0,0 +1,26 @@
+#
+# Makefile fuer Counter-Programm
+# File: makefile
+# Reto Bonderer, 23.10.2018
+#
+CC = g++
+LINK = g++
+CFLAGS = -c -Wall
+LFLAGS = -Wall
+OBJS = Counter.o CounterCtrl.o counterTest.o
+EXE = counterTest
+
+$(EXE): $(OBJS)
+	$(LINK) $(LFLAGS) -o $(EXE) $(OBJS)
+
+counterTest.o: counterTest.cpp CounterCtrl.h
+	$(CC) $(CFLAGS) counterTest.cpp
+
+Counter.o: Counter.cpp Counter.h
+	$(CC) $(CFLAGS) Counter.cpp
+
+CounterCtrl.o: CounterCtrl.cpp CounterCtrl.h Counter.h
+	$(CC) $(CFLAGS) CounterCtrl.cpp
+
+clean:
+	rm -f $(EXE) $(OBJS)
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/Counter.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern/Counter.cpp
new file mode 100644
index 0000000..2054287
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/Counter.cpp
@@ -0,0 +1,28 @@
+//
+// Counter.cpp
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include "Counter.h"
+
+Counter::Counter(int val): countValue(val)
+{
+}
+
+void Counter::count(int step)
+{
+  countValue += step;
+}
+
+int Counter::getCounter() const
+{
+  return countValue;
+}
+
+void Counter::setCounter(int val)
+{
+  countValue = val;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/Counter.h b/CodeTutorials/320-FSM_Realisierung/src/Pattern/Counter.h
new file mode 100644
index 0000000..0823cd7
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/Counter.h
@@ -0,0 +1,29 @@
+//
+// Counter.h
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#ifndef COUNTER_H__
+#define COUNTER_H__
+
+class Counter
+{
+  public:
+    Counter(int val=0);
+
+    void count(int step);
+    // counts the counter up (step>0) or down (step<0) by step
+
+    int getCounter() const;
+    // returns the counter value
+
+    void setCounter(int val);
+    // sets the counter to val
+  private:
+    int countValue;
+};
+
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterCtrl.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterCtrl.cpp
new file mode 100644
index 0000000..bc6915f
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterCtrl.cpp
@@ -0,0 +1,22 @@
+//
+// CounterCtrl.cpp
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+// CounterCtrl is the Context class in the State pattern
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2017
+//
+
+#include "CounterCtrl.h"
+#include "CounterState.h"
+
+CounterCtrl::CounterCtrl(int initValue): 
+  entity(initValue), 
+  pState(IdleState::getInstance()) // initial state
+{
+}
+
+void CounterCtrl::process(Event e)
+{ // delegates all requests to CounterState
+  pState =  pState->handle(entity, e);
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterCtrl.h b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterCtrl.h
new file mode 100644
index 0000000..6840ee5
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterCtrl.h
@@ -0,0 +1,31 @@
+//
+// CounterCtrl.h
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2017
+//
+
+#ifndef COUNTERCTRL_H__
+#define COUNTERCTRL_H__
+#include "Counter.h"
+
+class CounterState;  // forward declaration
+
+class CounterCtrl
+// this is the 'Context' class of the State pattern
+{
+  public:
+    enum Event{evUp,       // count upwards
+               evDown,     // count downwards
+               evCount,    // count (up or down)
+               evStop};    // stop counting
+    CounterCtrl(int initValue = 0);
+    void process(Event e);  
+    // changes the state of the FSM based on the event 'e'
+    
+  private:
+    Counter entity;
+    CounterState* pState;  // holds the current state
+};
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterState.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterState.cpp
new file mode 100644
index 0000000..b52f7fa
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterState.cpp
@@ -0,0 +1,102 @@
+//
+// CounterState.cpp
+//
+// implements all states of an up/down-Counter
+// this file contains all classes of the state machine.
+// it may make sense to have separate files for each state
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2017
+//
+
+#include <iostream>
+#include "CounterState.h"
+using namespace std;
+
+
+// class CounterState
+CounterState* CounterState::changeState(Counter& entity, CounterState* pnewState)
+{
+  return pnewState;
+}
+
+// class IdleState
+IdleState IdleState::instance;
+IdleState* IdleState::getInstance()
+{
+  return &instance;
+}
+
+CounterState* IdleState::handle(Counter& entity, CounterCtrl::Event e)
+{
+  cout << "State: idleState" << endl;
+  if (CounterCtrl::evUp == e)
+  {
+    // transition actions
+    cout << "counter = " << entity.getCounter() << endl;
+    // state transition
+    return changeState(entity, CountUpState::getInstance());
+  }
+  else if (CounterCtrl::evDown == e)
+  {
+    // transition actions
+    cout << "counter = " << entity.getCounter() << endl;
+    // state transition
+    return changeState(entity, CountDownState::getInstance());
+  }
+  return this;
+}
+
+// class CountUpState
+CountUpState CountUpState::instance;
+CountUpState* CountUpState::getInstance()
+{
+  return &instance;
+}
+
+CounterState* CountUpState::handle(Counter& entity, CounterCtrl::Event e)
+{
+  cout << "State: countUpState" << endl;
+  if (CounterCtrl::evCount == e)
+  {
+    // transition actions
+    entity.count(1);
+    cout << "counter = " << entity.getCounter() << endl;
+    // state transition
+    return changeState(entity, CountUpState::getInstance());
+  }
+  else if (CounterCtrl::evStop == e)
+  {
+    // transition actions
+    // state transition
+    return changeState(entity, IdleState::getInstance());
+  }
+  return this;
+}
+
+
+// class CountDownState
+CountDownState CountDownState::instance;
+CountDownState* CountDownState::getInstance()
+{
+  return &instance;
+}
+
+CounterState* CountDownState::handle(Counter& entity, CounterCtrl::Event e)
+{
+  cout << "State: countDownState" << endl;
+  if (CounterCtrl::evCount == e)
+  {
+    // transition actions
+    entity.count(-1);
+    cout << "counter = " << entity.getCounter() << endl;
+    // state transition
+    return changeState(entity, CountDownState::getInstance());
+  }
+  else if (CounterCtrl::evStop == e)
+  {
+    // transition actions
+    // state transition
+    return changeState(entity, IdleState::getInstance());
+  }
+  return this;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterState.h b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterState.h
new file mode 100644
index 0000000..0728f21
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/CounterState.h
@@ -0,0 +1,53 @@
+//
+// CounterState.h
+//
+// implements an up/down-Counter
+// this file contains all classes of the state machine
+// it may make sense to have separate files for each state
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, 21.10.2017
+//
+
+#ifndef COUNTERSTATE_H__
+#define COUNTERSTATE_H__
+#include "CounterCtrl.h"  // Events are defined here
+
+class CounterState  // abstract base class
+{
+  public:
+    virtual CounterState* handle(Counter& entity, CounterCtrl::Event e) = 0;
+    // returns new state
+  protected:    // only inherited classes may use these member functions
+    CounterState* changeState(Counter& entity, CounterState* pnewState);
+};
+
+class IdleState : public CounterState // it's a singleton
+{
+  public:
+    static IdleState* getInstance();
+    virtual CounterState*  handle(Counter& entity, CounterCtrl::Event e);
+  private:
+    IdleState() {};
+    static IdleState instance;
+};
+
+class CountUpState : public CounterState // it's a singleton
+{
+  public:
+    static CountUpState* getInstance();
+    virtual CounterState*  handle(Counter& entity, CounterCtrl::Event e);
+  private:
+    CountUpState() {};
+    static CountUpState instance;
+};
+
+class CountDownState : public CounterState // it's a singleton
+{
+  public:
+    static CountDownState* getInstance();
+    virtual CounterState*  handle(Counter& entity, CounterCtrl::Event e);
+  private:
+    CountDownState() {};
+    static CountDownState instance;
+};
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/counterTest.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern/counterTest.cpp
new file mode 100644
index 0000000..db2baba
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/counterTest.cpp
@@ -0,0 +1,52 @@
+//
+// counterTest.cpp
+//
+// Test program for the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+using namespace std;
+
+int main(void)
+{
+  char answer;
+  CounterCtrl myFsm;
+  
+  do
+  {
+    cout << endl << "-------------------------------------------" << endl;
+    cout << "    u   Count up" << endl;
+    cout << "    d   Count down" << endl;
+    cout << "    c   Count" << endl;
+    cout << "    s   Stop counting" << endl;
+    cout << "    q   Quit" << endl;
+
+    cout << endl << "Please press key: ";
+    cin >> answer;
+    cout << endl;
+    
+    switch (answer)
+    {
+      case 'u':
+        myFsm.process(CounterCtrl::evUp);
+        break;
+      case 'd':
+        myFsm.process(CounterCtrl::evDown);
+        break;
+      case 'c':
+        myFsm.process(CounterCtrl::evCount);
+        break;
+      case 's':
+        myFsm.process(CounterCtrl::evStop);
+        break;
+      default:
+        break;
+    }
+  } while (answer != 'q');
+  
+  return 0;
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/counterTest.exe b/CodeTutorials/320-FSM_Realisierung/src/Pattern/counterTest.exe
new file mode 100644
index 0000000..09e374c
Binary files /dev/null and b/CodeTutorials/320-FSM_Realisierung/src/Pattern/counterTest.exe differ
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern/makefile b/CodeTutorials/320-FSM_Realisierung/src/Pattern/makefile
new file mode 100644
index 0000000..2efec34
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern/makefile
@@ -0,0 +1,29 @@
+#
+# Makefile fuer Counter-Programm
+# File: makefile
+# Reto Bonderer, 21.10.2017
+#
+CC = g++
+LINK = g++
+# '-pedantic' sorgt dafuer, dass gcc streng arbeitet
+CFLAGS = -c -pedantic -Wall
+LFLAGS = -pedantic
+OBJS = Counter.o CounterCtrl.o CounterState.o counterTest.o
+
+counterTest: $(OBJS)
+	$(LINK) $(LFLAGS) -o counterTest $(OBJS)
+
+counterTest.o: counterTest.cpp CounterCtrl.h
+	$(CC) $(CFLAGS) counterTest.cpp
+
+Counter.o: Counter.cpp Counter.h
+	$(CC) $(CFLAGS) Counter.cpp
+
+CounterCtrl.o: CounterCtrl.cpp CounterCtrl.h CounterState.h
+	$(CC) $(CFLAGS) CounterCtrl.cpp
+
+CounterState.o: CounterState.cpp CounterState.h Counter.h CounterCtrl.h
+	$(CC) $(CFLAGS) CounterState.cpp
+  
+clean:
+	rm -f counterTest $(OBJS)
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/.vscode/settings.json b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/.vscode/settings.json
new file mode 100644
index 0000000..38991d9
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/.vscode/settings.json
@@ -0,0 +1,6 @@
+{
+    "files.associations": {
+        "xmemory": "cpp",
+        "xstring": "cpp"
+    }
+}
\ No newline at end of file
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/Counter.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/Counter.cpp
new file mode 100644
index 0000000..eb6cdf6
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/Counter.cpp
@@ -0,0 +1,28 @@
+//
+// Counter.cpp
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2017
+//
+
+#include "Counter.h"
+
+Counter::Counter(int val): countValue(val)
+{
+}
+
+void Counter::count(int step)
+{
+  countValue += step;
+}
+
+int Counter::getCounter() const
+{
+  return countValue;
+}
+
+void Counter::setCounter(int val)
+{
+  countValue = val;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/Counter.h b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/Counter.h
new file mode 100644
index 0000000..7442f76
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/Counter.h
@@ -0,0 +1,29 @@
+//
+// Counter.h
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2017
+//
+
+#ifndef COUNTER_H__
+#define COUNTER_H__
+
+class Counter
+{
+  public:
+    Counter(int val=0);
+
+    void count(int step);
+    // counts the counter up (step>0) or down (step<0) by step
+
+    int getCounter() const;
+    // returns the counter value
+
+    void setCounter(int val);
+    // sets the counter to val
+  private:
+    int countValue;
+};
+
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterCtrl.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterCtrl.cpp
new file mode 100644
index 0000000..fd638eb
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterCtrl.cpp
@@ -0,0 +1,23 @@
+//
+// CounterCtrl.cpp
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+// CounterCtrl is the Context class in the State pattern
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2018
+//
+
+#include "Counter.h"
+#include "CounterState.h"
+#include "CounterCtrl.h"
+
+CounterCtrl::CounterCtrl(int initValue) :
+  entity(initValue), 
+  pState(CounterState::init(entity)) // initial state
+{
+}
+
+void CounterCtrl::process(Event e)
+{ // delegates all requests to CounterState
+  pState =  pState->handle(entity, e);  // entity: reference to entity class object
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterCtrl.h b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterCtrl.h
new file mode 100644
index 0000000..3bffe53
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterCtrl.h
@@ -0,0 +1,30 @@
+//
+// CounterCtrl.h
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2017
+//
+
+#ifndef COUNTERCTRL_H__
+#define COUNTERCTRL_H__
+#include "Counter.h"
+
+class CounterState;   // forward declaration
+
+class CounterCtrl
+// this is the 'Context' class of the State pattern
+{
+  public:
+    enum Event{evUp,       // count upwards
+               evDown,     // count downwards
+               evCount,    // count (up or down)
+               evStop};    // stop counting
+    CounterCtrl(int initValue = 0);
+    void process(Event e);  
+    // changes the state of the FSM based on the event 'e'
+  private:
+    Counter entity;        // entity class
+    CounterState* pState;  // holds the current state
+};
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterState.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterState.cpp
new file mode 100644
index 0000000..c41df71
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterState.cpp
@@ -0,0 +1,150 @@
+//
+// CounterState.cpp
+//
+// implements all states of an up/down-Counter
+// this file contains all classes of the state machine.
+// it may make sense to have separate files for each state
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2018
+//
+
+#include <iostream>
+#include "CounterState.h"
+using namespace std;
+
+
+//class CounterState
+CounterState* CounterState::init(Counter& entity)  // is static
+{
+  CounterState* initState = IdleState::getInstance();
+  initState->entryAction(entity);      // executes entry action into init state
+  return initState;
+}
+
+CounterState* CounterState::changeState(Counter& entity, 
+                                        Action ptransAction, 
+                                        CounterState* pnewState)
+{
+  exitAction(entity);              // polymorphic call of exit action
+  (this->*ptransAction)(entity);   // call of transition action
+  pnewState->entryAction(entity);  // polymorphic call of entry action
+  return pnewState;
+}
+
+void CounterState::showCounter(Counter& entity)
+{
+  cout << "counter = " << entity.getCounter() << endl;
+}
+
+void CounterState::countUp(Counter& entity)
+{
+  entity.count(1);
+  cout << "counter = " << entity.getCounter() << endl;
+}
+
+void CounterState::countDown(Counter& entity)
+{
+  entity.count(-1);
+  cout << "counter = " << entity.getCounter() << endl;
+}
+
+
+// class IdleState
+IdleState IdleState::instance;
+IdleState* IdleState::getInstance()
+{
+  return &instance;
+}
+
+CounterState* IdleState::handle(Counter& entity, CounterCtrl::Event e)
+{
+  cout << "State: idleState" << endl;
+  if (CounterCtrl::evUp == e)
+  {
+    // state transition
+    return changeState(entity, &IdleState::showCounter, CountUpState::getInstance());
+  }
+  else if (CounterCtrl::evDown == e)
+  {
+    // state transition
+    return changeState(entity, &IdleState::showCounter, CountDownState::getInstance());
+  }
+  return this;
+}
+
+void IdleState::entryAction(Counter& entity)
+{
+  cout << "Entering idleState" << endl;
+}
+
+void IdleState::exitAction(Counter& entity)
+{
+  cout << "Exiting from idleState" << endl;
+}
+
+
+// class CountUpState
+CountUpState CountUpState::instance;
+CountUpState* CountUpState::getInstance()
+{
+  return &instance;
+}
+
+CounterState* CountUpState::handle(Counter& entity, CounterCtrl::Event e)
+{
+  cout << "State: countUpState" << endl;
+  if (CounterCtrl::evCount == e)
+  {
+    // state transition
+    return changeState(entity, &CountUpState::countUp, CountUpState::getInstance());
+  }
+  else if (CounterCtrl::evStop == e)
+  {
+    // state transition
+    return changeState(entity, &CountUpState::emptyAction, IdleState::getInstance());
+  }
+  return this;
+}
+
+void CountUpState::entryAction(Counter& entity)
+{
+  cout << "Entering countUpState" << endl;
+}
+
+void CountUpState::exitAction(Counter& entity)
+{
+  cout << "Exiting from countUpState" << endl;
+}
+
+// class CountDownState
+CountDownState CountDownState::instance;
+CountDownState* CountDownState::getInstance()
+{
+  return &instance;
+}
+
+CounterState* CountDownState::handle(Counter& entity, CounterCtrl::Event e)
+{
+  cout << "State: countDownState" << endl;
+  if (CounterCtrl::evCount == e)
+  {
+    // state transition
+    return changeState(entity, &CountDownState::countDown, CountDownState::getInstance());
+  }
+  else if (CounterCtrl::evStop == e)
+  {
+    // state transition
+    return changeState(entity, &CountDownState::emptyAction, IdleState::getInstance());
+  }
+  return this;
+}
+
+void CountDownState::entryAction(Counter& entity)
+{
+  cout << "Entering countDownState" << endl;
+}
+
+void CountDownState::exitAction(Counter& entity)
+{
+  cout << "Exiting from countDownState" << endl;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterState.h b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterState.h
new file mode 100644
index 0000000..9e08021
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/CounterState.h
@@ -0,0 +1,73 @@
+//
+// CounterState.h
+//
+// implements an up/down-Counter
+// this file contains all classes of the state machine
+// it may make sense to have separate files for each state
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Oct. 2018
+//
+
+#ifndef COUNTERSTATE_H__
+#define COUNTERSTATE_H__
+#include "CounterCtrl.h"
+
+class CounterState  // abstract base class
+{
+  public:
+    static CounterState* init(Counter& entity);
+    // should be called first, returns new state
+    virtual CounterState* handle(Counter& entity, CounterCtrl::Event e) = 0;
+    // returns new state
+  protected:
+    virtual void entryAction(Counter& entity) {};
+    virtual void exitAction(Counter& entity) {};
+    typedef void (CounterState::*Action)(Counter& entity);   // ptr to action function
+    CounterState* changeState(Counter& entity, Action ptransAction, CounterState* pnewState);
+
+    // transition actions
+    void emptyAction(Counter& entity) {};
+    void showCounter(Counter& entity);
+    void countUp(Counter& entity);
+    void countDown(Counter& entity);
+};
+
+class IdleState : public CounterState // it's a singleton
+{
+  public:
+    static IdleState* getInstance();
+    virtual CounterState*  handle(Counter& entity, CounterCtrl::Event e);
+  protected:
+    virtual void entryAction(Counter& entity);
+    virtual void exitAction(Counter& entity);
+  private:
+    IdleState() {};
+    static IdleState instance;
+};
+
+class CountUpState : public CounterState // it's a singleton
+{
+  public:
+    static CountUpState* getInstance();
+    virtual CounterState*  handle(Counter& entity, CounterCtrl::Event e);
+  protected:
+    virtual void entryAction(Counter& entity);
+    virtual void exitAction(Counter& entity);
+  private:
+    CountUpState() {};
+    static CountUpState instance;
+};
+
+class CountDownState : public CounterState // it's a singleton
+{
+  public:
+    static CountDownState* getInstance();
+    virtual CounterState*  handle(Counter& entity, CounterCtrl::Event e);
+  protected:
+    virtual void entryAction(Counter& entity);
+    virtual void exitAction(Counter& entity);
+  private:
+    CountDownState() {};
+    static CountDownState instance;
+};
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/counterTest.cpp b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/counterTest.cpp
new file mode 100644
index 0000000..e2be939
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/counterTest.cpp
@@ -0,0 +1,52 @@
+//
+// counterTest.cpp
+//
+// Test program for the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Nov. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+using namespace std;
+
+int main(void)
+{
+  char answer;
+  CounterCtrl myFsm;
+  
+  do
+  {
+    cout << endl << "-------------------------------------------" << endl;
+    cout << "    u   Count up" << endl;
+    cout << "    d   Count down" << endl;
+    cout << "    c   Count" << endl;
+    cout << "    s   Stop counting" << endl;
+    cout << "    q   Quit" << endl;
+
+    cout << endl << "Please press key: ";
+    cin >> answer;
+    cout << endl;
+    
+    switch (answer)
+    {
+      case 'u':
+        myFsm.process(CounterCtrl::evUp);
+        break;
+      case 'd':
+        myFsm.process(CounterCtrl::evDown);
+        break;
+      case 'c':
+        myFsm.process(CounterCtrl::evCount);
+        break;
+      case 's':
+        myFsm.process(CounterCtrl::evStop);
+        break;
+      default:
+        break;
+    }
+  } while (answer != 'q');
+  
+  return 0;
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/makefile b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/makefile
new file mode 100644
index 0000000..7c653f0
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Pattern_Action/makefile
@@ -0,0 +1,30 @@
+#
+# Makefile fuer Counter-Programm
+# File: makefile
+# Reto Bonderer, 21.10.2017
+#
+CC = g++
+LINK = g++
+# '-pedantic' sorgt dafuer, dass g++ streng arbeitet
+CFLAGS = -c -pedantic -Wall
+LFLAGS = -pedantic
+OBJS = Counter.o CounterCtrl.o CounterState.o counterTest.o
+EXE = counterTest
+
+$(EXE): $(OBJS)
+	$(LINK) $(LFLAGS) -o $(EXE) $(OBJS)
+
+counterTest.o: counterTest.cpp CounterCtrl.h
+	$(CC) $(CFLAGS) counterTest.cpp
+
+Counter.o: Counter.cpp Counter.h
+	$(CC) $(CFLAGS) Counter.cpp
+
+CounterCtrl.o: CounterCtrl.cpp CounterCtrl.h CounterState.h
+	$(CC) $(CFLAGS) CounterCtrl.cpp
+
+CounterState.o: CounterState.cpp CounterState.h Counter.h
+	$(CC) $(CFLAGS) CounterState.cpp
+  
+clean:
+	rm -f $(EXE) $(OBJS)
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/Counter.cpp b/CodeTutorials/320-FSM_Realisierung/src/Table/Counter.cpp
new file mode 100644
index 0000000..2054287
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table/Counter.cpp
@@ -0,0 +1,28 @@
+//
+// Counter.cpp
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include "Counter.h"
+
+Counter::Counter(int val): countValue(val)
+{
+}
+
+void Counter::count(int step)
+{
+  countValue += step;
+}
+
+int Counter::getCounter() const
+{
+  return countValue;
+}
+
+void Counter::setCounter(int val)
+{
+  countValue = val;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/Counter.h b/CodeTutorials/320-FSM_Realisierung/src/Table/Counter.h
new file mode 100644
index 0000000..84e2055
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table/Counter.h
@@ -0,0 +1,29 @@
+//
+// Counter.h
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#ifndef COUNTER_H__
+#define COUNTER_H__
+
+class Counter
+{
+  public:
+    Counter(int val);
+
+    void count(int step);
+    // counts the counter up (step>0) or down (step<0) by step
+
+    int getCounter() const;
+    // returns the counter value
+
+    void setCounter(int val);
+    // sets the counter to val
+  private:
+    int countValue;
+};
+
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/CounterCtrl.cpp b/CodeTutorials/320-FSM_Realisierung/src/Table/CounterCtrl.cpp
new file mode 100644
index 0000000..10772c9
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table/CounterCtrl.cpp
@@ -0,0 +1,104 @@
+//
+// CounterCtrl.cpp
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter as a table
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+#include "Counter.h"
+using namespace std;
+
+const CounterCtrl::Transition CounterCtrl::fsm[] =  // this table defines the fsm
+{//currentState     checker function              action function               next state
+  {idleState,       &CounterCtrl::checkIdleUp,    &CounterCtrl::actionIdleUp,   countUpState},
+  {idleState,       &CounterCtrl::checkIdleDown,  &CounterCtrl::actionIdleDown, countDownState},
+  {countUpState,    &CounterCtrl::checkUpUp,      &CounterCtrl::actionUpUp,     countUpState},
+  {countUpState,    &CounterCtrl::checkUpIdle,    &CounterCtrl::actionUpIdle,   idleState},
+  {countDownState,  &CounterCtrl::checkDownDown,  &CounterCtrl::actionDownDown, countDownState},
+  {countDownState,  &CounterCtrl::checkDownIdle,  &CounterCtrl::actionDownIdle, idleState}
+};
+
+CounterCtrl::CounterCtrl(int initValue) : 
+  currentState(idleState),
+  myCounter(initValue)
+{
+}
+
+void CounterCtrl::process(Event e)    // this function never changes
+{
+  for (size_t i = 0; i < sizeof(fsm) / sizeof(Transition); ++i) // let compiler determine number of transitions
+  {
+    if (fsm[i].currentState == currentState &&  // is there an entry in the table?
+        (this->*fsm[i].pChecker)(e))
+    {
+      (this->*fsm[i].pAction)();
+      currentState = fsm[i].nextState;
+      break;
+    }
+  }
+}
+
+// check functions
+bool CounterCtrl::checkIdleUp(Event e)
+{
+  return evUp == e;
+}
+
+bool CounterCtrl::checkIdleDown(Event e)
+{
+  return evDown == e;
+}
+
+bool CounterCtrl::checkUpIdle(Event e)
+{
+  return evStop == e;
+}
+
+bool CounterCtrl::checkDownIdle(Event e)
+{
+  return evStop == e;
+}
+
+bool CounterCtrl::checkUpUp(Event e)
+{
+  return evCount == e;
+}
+
+bool CounterCtrl::checkDownDown(Event e)
+{
+  return evCount == e;
+}
+
+// action functions
+void CounterCtrl::actionIdleUp(void)
+{
+  cout << "State: idleState, counter = " << myCounter.getCounter() << endl;
+}
+
+void CounterCtrl::actionIdleDown(void)
+{
+  cout << "State: idleState, counter = " << myCounter.getCounter() << endl;
+}
+
+void CounterCtrl::actionUpIdle(void)
+{
+}
+
+void CounterCtrl::actionDownIdle(void)
+{
+}
+
+void CounterCtrl::actionUpUp(void)
+{
+  myCounter.count(1);
+  cout << "State: countUpState, counter = " << myCounter.getCounter() << endl;
+}
+
+void CounterCtrl::actionDownDown(void)
+{
+  myCounter.count(-1);
+  cout << "State: countDownState, counter = " << myCounter.getCounter() << endl;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/CounterCtrl.h b/CodeTutorials/320-FSM_Realisierung/src/Table/CounterCtrl.h
new file mode 100644
index 0000000..248cdde
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table/CounterCtrl.h
@@ -0,0 +1,60 @@
+//
+// CounterCtrl.h
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter as a table
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#ifndef COUNTERCTRL_H__
+#define COUNTERCTRL_H__
+#include "Counter.h"
+
+class CounterCtrl
+{
+  public:
+    enum Event{evUp,       // count upwards
+               evDown,     // count downwards
+               evCount,    // count (up or down)
+               evStop};    // stop counting
+    CounterCtrl(int initValue = 0);
+    void process(Event e);
+    // changes the state of the FSM based on the event 'e'
+    // starts the actions
+
+  private:
+    enum State{idleState,         // idle state
+               countUpState,      // counting up at each count event
+               countDownState};   // counting down at each count event
+
+    State currentState;           // holds the current state of the FSM
+    Counter myCounter;
+    
+    typedef bool (CounterCtrl::*Checker)(Event); // function ptr for checker function
+    typedef void (CounterCtrl::*Action)(void);   // function ptr for action function
+    // check functions
+    bool checkIdleUp(Event e);
+    bool checkIdleDown(Event e);
+    bool checkUpIdle(Event e);
+    bool checkDownIdle(Event e);
+    bool checkUpUp(Event e);
+    bool checkDownDown(Event e);
+    
+    // action functions
+    void actionIdleUp(void);
+    void actionIdleDown(void);
+    void actionUpIdle(void);
+    void actionDownIdle(void);
+    void actionUpUp(void);
+    void actionDownDown(void);
+    
+    struct Transition
+    {
+      State currentState;   // current state
+      Checker pChecker;     // pointer to checker function
+      Action pAction;       // pointer to action function
+      State nextState;      // next state
+    };
+    static const Transition fsm[];
+};
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest b/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest
new file mode 100644
index 0000000..f5b1d62
Binary files /dev/null and b/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest differ
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest.cpp b/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest.cpp
new file mode 100644
index 0000000..a66cdfc
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest.cpp
@@ -0,0 +1,52 @@
+//
+// counterTest.cpp
+//
+// Test program for the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+using namespace std;
+
+int main(void)
+{
+  char answer;
+  CounterCtrl myFsm(0);
+  
+  do
+  {
+    cout << endl << "-------------------------------------------" << endl;
+    cout << "    u   Count up" << endl;
+    cout << "    d   Count down" << endl;
+    cout << "    c   Count" << endl;
+    cout << "    s   Stop counting" << endl;
+    cout << "    q   Quit" << endl;
+
+    cout << endl << "Please press key: ";
+    cin >> answer;
+    cout << endl;
+    
+    switch (answer)
+    {
+      case 'u':
+        myFsm.process(CounterCtrl::evUp);
+        break;
+      case 'd':
+        myFsm.process(CounterCtrl::evDown);
+        break;
+      case 'c':
+        myFsm.process(CounterCtrl::evCount);
+        break;
+      case 's':
+        myFsm.process(CounterCtrl::evStop);
+        break;
+      default:
+        break;
+    }
+  } while (answer != 'q');
+  
+  return 0;
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest.exe b/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest.exe
new file mode 100644
index 0000000..6f4a055
Binary files /dev/null and b/CodeTutorials/320-FSM_Realisierung/src/Table/counterTest.exe differ
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table/makefile b/CodeTutorials/320-FSM_Realisierung/src/Table/makefile
new file mode 100644
index 0000000..dac2246
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table/makefile
@@ -0,0 +1,26 @@
+#
+# Makefile fuer Counter-Programm
+# File: makefile
+# Reto Bonderer, 07.10.2017
+#
+CC = g++
+LINK = g++
+CFLAGS = -c -Wall
+LFLAGS = -Wall
+OBJS = Counter.o CounterCtrl.o counterTest.o
+EXE = counterTest
+
+$(EXE): $(OBJS)
+	$(LINK) $(LFLAGS) -o $(EXE) $(OBJS)
+
+counterTest.o: counterTest.cpp CounterCtrl.h
+	$(CC) $(CFLAGS) counterTest.cpp
+
+Counter.o: Counter.cpp Counter.h
+	$(CC) $(CFLAGS) Counter.cpp
+
+CounterCtrl.o: CounterCtrl.cpp CounterCtrl.h Counter.h
+	$(CC) $(CFLAGS) CounterCtrl.cpp
+
+clean:
+	rm -f $(EXE) $(OBJS)
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/Counter.cpp b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/Counter.cpp
new file mode 100644
index 0000000..2054287
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/Counter.cpp
@@ -0,0 +1,28 @@
+//
+// Counter.cpp
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include "Counter.h"
+
+Counter::Counter(int val): countValue(val)
+{
+}
+
+void Counter::count(int step)
+{
+  countValue += step;
+}
+
+int Counter::getCounter() const
+{
+  return countValue;
+}
+
+void Counter::setCounter(int val)
+{
+  countValue = val;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/Counter.h b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/Counter.h
new file mode 100644
index 0000000..84e2055
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/Counter.h
@@ -0,0 +1,29 @@
+//
+// Counter.h
+//
+// implements an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#ifndef COUNTER_H__
+#define COUNTER_H__
+
+class Counter
+{
+  public:
+    Counter(int val);
+
+    void count(int step);
+    // counts the counter up (step>0) or down (step<0) by step
+
+    int getCounter() const;
+    // returns the counter value
+
+    void setCounter(int val);
+    // sets the counter to val
+  private:
+    int countValue;
+};
+
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/CounterCtrl.cpp b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/CounterCtrl.cpp
new file mode 100644
index 0000000..9d8134d
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/CounterCtrl.cpp
@@ -0,0 +1,69 @@
+//
+// CounterCtrl.cpp
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter as a simple table
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+#include "Counter.h"
+using namespace std;
+
+const CounterCtrl::Transition CounterCtrl::fsm[] =  // this table defines the fsm
+{//currentState     triggering event  action function                 next state
+  {idleState,       evUp,             &CounterCtrl::actionIdleUp,     countUpState},
+  {idleState,       evDown,           &CounterCtrl::actionIdleDown,   countDownState},
+  {countUpState,    evCount,          &CounterCtrl::actionUpUp,       countUpState},
+  {countUpState,    evStop,           &CounterCtrl::actionDoNothing,  idleState},
+  {countDownState,  evCount,          &CounterCtrl::actionDownDown,   countDownState},
+  {countDownState,  evStop,           &CounterCtrl::actionDoNothing,  idleState}
+};
+
+CounterCtrl::CounterCtrl(int initValue) : 
+  currentState(idleState),
+  myCounter(initValue)
+{
+}
+
+void CounterCtrl::process(Event e)    // execution engine, this function never changes
+{
+  for (size_t i = 0; i < sizeof(fsm) / sizeof(Transition); ++i) // determine number of transitions automatically
+  {
+    if (fsm[i].currentState == currentState &&  fsm[i].ev == e) // is there an entry in the table?
+    {
+      (this->*fsm[i].pAction)();
+      currentState = fsm[i].nextState;
+      break;
+    }
+  }
+}
+
+
+// action functions
+void CounterCtrl::actionIdleUp(void)
+{
+  cout << "State: idleState, counter = " << myCounter.getCounter() << endl;
+}
+
+void CounterCtrl::actionIdleDown(void)
+{
+  cout << "State: idleState, counter = " << myCounter.getCounter() << endl;
+}
+
+void CounterCtrl::actionDoNothing(void)
+{
+}
+
+void CounterCtrl::actionUpUp(void)
+{
+  myCounter.count(1);
+  cout << "State: countUpState, counter = " << myCounter.getCounter() << endl;
+}
+
+void CounterCtrl::actionDownDown(void)
+{
+  myCounter.count(-1);
+  cout << "State: countDownState, counter = " << myCounter.getCounter() << endl;
+}
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/CounterCtrl.h b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/CounterCtrl.h
new file mode 100644
index 0000000..986fe20
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/CounterCtrl.h
@@ -0,0 +1,51 @@
+//
+// CounterCtrl.h
+//
+// implements the Finite State Machine (FSM) of an up/down-Counter as a simple table
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#ifndef COUNTERCTRL_H__
+#define COUNTERCTRL_H__
+#include "Counter.h"
+
+class CounterCtrl
+{
+  public:
+    enum Event{evUp,       // count upwards
+               evDown,     // count downwards
+               evCount,    // count (up or down)
+               evStop};    // stop counting
+    CounterCtrl(int initValue = 0);
+    void process(Event e);
+    // changes the state of the FSM based on the event 'e'
+    // starts the actions
+
+  private:
+    enum State{idleState,         // idle state
+               countUpState,      // counting up at each count event
+               countDownState};   // counting down at each count event
+
+    State currentState;           // holds the current state of the FSM
+    Counter myCounter;
+    
+    typedef void (CounterCtrl::*Action)(void);   // function ptr for action function
+  
+    // action functions
+    void actionIdleUp(void);
+    void actionIdleDown(void);
+    void actionDoNothing(void);
+    void actionUpUp(void);
+    void actionDownDown(void);
+    
+    struct Transition
+    {
+      State currentState;   // current state
+      Event ev;             // event triggering the transition
+      Action pAction;       // pointer to action function
+      State nextState;      // next state
+    };
+    static const Transition fsm[];
+};
+#endif
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/counterTest b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/counterTest
new file mode 100644
index 0000000..bd911fa
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diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/counterTest.cpp b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/counterTest.cpp
new file mode 100644
index 0000000..db2baba
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/counterTest.cpp
@@ -0,0 +1,52 @@
+//
+// counterTest.cpp
+//
+// Test program for the Finite State Machine (FSM) of an up/down-Counter
+//
+// (C) R. Bonderer, HSR Hochschule Rapperswil, Okt. 2017
+//
+
+#include <iostream>
+#include "CounterCtrl.h"
+using namespace std;
+
+int main(void)
+{
+  char answer;
+  CounterCtrl myFsm;
+  
+  do
+  {
+    cout << endl << "-------------------------------------------" << endl;
+    cout << "    u   Count up" << endl;
+    cout << "    d   Count down" << endl;
+    cout << "    c   Count" << endl;
+    cout << "    s   Stop counting" << endl;
+    cout << "    q   Quit" << endl;
+
+    cout << endl << "Please press key: ";
+    cin >> answer;
+    cout << endl;
+    
+    switch (answer)
+    {
+      case 'u':
+        myFsm.process(CounterCtrl::evUp);
+        break;
+      case 'd':
+        myFsm.process(CounterCtrl::evDown);
+        break;
+      case 'c':
+        myFsm.process(CounterCtrl::evCount);
+        break;
+      case 's':
+        myFsm.process(CounterCtrl::evStop);
+        break;
+      default:
+        break;
+    }
+  } while (answer != 'q');
+  
+  return 0;
+}
+
diff --git a/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/makefile b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/makefile
new file mode 100644
index 0000000..dac2246
--- /dev/null
+++ b/CodeTutorials/320-FSM_Realisierung/src/Table_Simple/makefile
@@ -0,0 +1,26 @@
+#
+# Makefile fuer Counter-Programm
+# File: makefile
+# Reto Bonderer, 07.10.2017
+#
+CC = g++
+LINK = g++
+CFLAGS = -c -Wall
+LFLAGS = -Wall
+OBJS = Counter.o CounterCtrl.o counterTest.o
+EXE = counterTest
+
+$(EXE): $(OBJS)
+	$(LINK) $(LFLAGS) -o $(EXE) $(OBJS)
+
+counterTest.o: counterTest.cpp CounterCtrl.h
+	$(CC) $(CFLAGS) counterTest.cpp
+
+Counter.o: Counter.cpp Counter.h
+	$(CC) $(CFLAGS) Counter.cpp
+
+CounterCtrl.o: CounterCtrl.cpp CounterCtrl.h Counter.h
+	$(CC) $(CFLAGS) CounterCtrl.cpp
+
+clean:
+	rm -f $(EXE) $(OBJS)
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diff --git a/CodeTutorials/600-Advanced-C++/70-Modeling_MMIO.pdf b/CodeTutorials/600-Advanced-C++/70-Modeling_MMIO.pdf
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diff --git a/CodeTutorials/600-Advanced-C++/src/TIHeaders/stdint.h b/CodeTutorials/600-Advanced-C++/src/TIHeaders/stdint.h
new file mode 100644
index 0000000..cbebffb
--- /dev/null
+++ b/CodeTutorials/600-Advanced-C++/src/TIHeaders/stdint.h
@@ -0,0 +1,194 @@
+/*****************************************************************************/
+/* STDINT.H v5.2.1                                                           */
+/* Copyright (c) 2002-2009 Texas Instruments Incorporated                    */
+/*****************************************************************************/
+#ifndef _STDINT_H_
+#define _STDINT_H_
+
+/* 7.18.1.1 Exact-width integer types */
+
+    typedef          int    int16_t;
+    typedef unsigned int   uint16_t;
+    typedef          long   int32_t;
+    typedef unsigned long  uint32_t;
+
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    typedef          long long  int64_t;
+    typedef unsigned long long uint64_t;
+#endif
+
+/* 7.18.1.2 Minimum-width integer types */
+
+    typedef  int16_t  int_least8_t;
+    typedef uint16_t uint_least8_t;
+
+    typedef  int16_t  int_least16_t;
+    typedef uint16_t uint_least16_t;
+    typedef  int32_t  int_least32_t;
+    typedef uint32_t uint_least32_t;
+
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    typedef  int64_t  int_least64_t;
+    typedef uint64_t uint_least64_t;
+#else
+/* sorry, int_least64_t not implemented for C54x, C55x, MSP430 */
+#endif
+
+/* 7.18.1.3 Fastest minimum-width integer types */
+
+    typedef  int16_t  int_fast8_t;
+    typedef uint16_t uint_fast8_t;
+    typedef  int16_t  int_fast16_t;
+    typedef uint16_t uint_fast16_t;
+
+    typedef  int32_t  int_fast32_t;
+    typedef uint32_t uint_fast32_t;
+
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    typedef  int64_t  int_fast64_t;
+    typedef uint64_t uint_fast64_t;
+#endif
+
+/* 7.18.1.4 Integer types capable of holding object pointers */
+    typedef          long intptr_t;
+    typedef unsigned long uintptr_t;
+
+/* 7.18.1.5 Greatest-width integer types */
+#if defined(__TMS320C55X__) || defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    typedef          long long intmax_t;
+    typedef unsigned long long uintmax_t;
+#elif defined(_TMS320C5XX) || defined(__TMS320C27X__) || defined(__MSP430__)
+    typedef          long intmax_t;
+    typedef unsigned long uintmax_t;
+#endif
+
+/* 
+   According to footnotes in the 1999 C standard, "C++ implementations
+   should define these macros only when __STDC_LIMIT_MACROS is defined
+   before <stdint.h> is included." 
+*/
+#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS)
+
+/* 7.18.2 Limits of specified width integer types */
+
+
+    #define  INT16_MAX  0x7fff
+    #define  INT16_MIN  (-INT16_MAX-1)
+    #define UINT16_MAX  0xffff
+
+    #define  INT32_MAX  0x7fffffff
+    #define  INT32_MIN  (-INT32_MAX-1)
+    #define UINT32_MAX  0xffffffff
+
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    #define  INT64_MAX  0x7fffffffffffffff
+    #define  INT64_MIN  (-INT64_MAX-1)
+    #define UINT64_MAX  0xffffffffffffffff
+#endif
+
+    #define  INT_LEAST8_MAX   INT16_MAX
+    #define  INT_LEAST8_MIN   INT16_MIN
+    #define UINT_LEAST8_MAX   UINT16_MAX
+
+    #define  INT_LEAST16_MAX  INT16_MAX
+    #define  INT_LEAST16_MIN  INT16_MIN
+    #define UINT_LEAST16_MAX  UINT16_MAX
+    #define  INT_LEAST32_MAX  INT32_MAX
+    #define  INT_LEAST32_MIN  INT32_MIN
+    #define UINT_LEAST32_MAX  UINT32_MAX
+
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    #define  INT_LEAST64_MAX  INT64_MAX
+    #define  INT_LEAST64_MIN  INT64_MIN
+    #define UINT_LEAST64_MAX  UINT64_MAX
+#endif
+
+    #define  INT_FAST8_MAX   INT16_MAX
+    #define  INT_FAST8_MIN   INT16_MIN
+    #define UINT_FAST8_MAX   UINT16_MAX
+    #define  INT_FAST16_MAX  INT16_MAX
+    #define  INT_FAST16_MIN  INT16_MIN
+    #define UINT_FAST16_MAX  UINT16_MAX
+
+    #define  INT_FAST32_MAX  INT32_MAX
+    #define  INT_FAST32_MIN  INT32_MIN
+    #define UINT_FAST32_MAX  UINT32_MAX
+
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    #define  INT_FAST64_MAX  INT64_MAX
+    #define  INT_FAST64_MIN  INT64_MIN
+    #define UINT_FAST64_MAX  UINT64_MAX
+#endif
+
+    #define INTPTR_MAX   INT32_MAX
+    #define INTPTR_MIN   INT32_MIN
+    #define UINTPTR_MAX  UINT32_MAX
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    #define INTMAX_MIN   INT64_MIN
+    #define INTMAX_MAX   INT64_MAX
+    #define UINTMAX_MAX  UINT64_MAX
+#elif defined(_TMS320C5XX) || defined(__TMS320C27X__) || defined(__MSP430__)
+    #define INTMAX_MIN   INT32_MIN
+    #define INTMAX_MAX   INT32_MAX
+    #define UINTMAX_MAX  UINT32_MAX
+#endif
+
+/* 7.18.3 Limits of other integer types */
+
+    #define PTRDIFF_MAX INT32_MAX
+    #define PTRDIFF_MIN INT32_MIN
+
+    #define SIG_ATOMIC_MIN INT32_MIN
+    #define SIG_ATOMIC_MAX INT32_MAX
+
+    #define SIZE_MAX INT32_MAX
+
+#ifndef WCHAR_MAX
+#define WCHAR_MAX 0xffffu
+#endif
+
+#ifndef WCHAR_MIN
+#define WCHAR_MIN 0
+#endif
+
+    #define WINT_MIN INT32_MIN
+    #define WINT_MAX INT32_MAX
+
+/* 7.18.4.1 Macros for minimum-width integer constants */
+
+/*
+   There is a defect report filed against the C99 standard concerning how 
+   the (U)INTN_C macros should be implemented.  Please refer to --
+   http://wwwold.dkuug.dk/JTC1/SC22/WG14/www/docs/dr_209.htm 
+   for more information.  These macros are implemented according to the
+   suggestion given at this web site.
+*/
+
+    #define  INT8_C(value)  ((int_least8_t)(value))
+    #define UINT8_C(value)  ((uint_least8_t)(value))
+    #define  INT16_C(value) ((int_least16_t)(value))
+    #define UINT16_C(value) ((uint_least16_t)(value))
+    #define  INT32_C(value) ((int_least32_t)(value))
+    #define UINT32_C(value) ((uint_least32_t)(value))
+
+
+#if defined(__TMS470__) || defined(_TMS320C6X) || defined(__TMS320C28X__)
+    #define  INT64_C(value) ((int_least64_t)(value))
+    #define UINT64_C(value) ((uint_least64_t)(value))
+#endif
+
+/* 7.18.4.2 Macros for greatest-width integer constants */
+
+    #define  INTMAX_C(value) ((intmax_t)(value))
+    #define UINTMAX_C(value) ((uintmax_t)(value))
+
+#endif /* !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) */
+
+#endif /* _STDINT_H_ */
diff --git a/KED_structure_idea/Makefile b/KED_structure_idea/Makefile
new file mode 100644
index 0000000..db99c6d
--- /dev/null
+++ b/KED_structure_idea/Makefile
@@ -0,0 +1,29 @@
+cpp_src = $(wildcard *.cpp) 
+#cpp_src += $(wildcard ./utils/*.cpp)
+#cpp_src += $(wildcard ./driver/*.cpp)
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = 
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+
+debug : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -g -o $@ $^ $(LDFLAGS) 
+
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
diff --git a/KED_structure_idea/bsl/hw_plattform.hpp b/KED_structure_idea/bsl/hw_plattform.hpp
new file mode 100644
index 0000000..31d711d
--- /dev/null
+++ b/KED_structure_idea/bsl/hw_plattform.hpp
@@ -0,0 +1,42 @@
+#ifndef __HW_PLATTFORM_HPP__
+#define __HW_PLATTFORM_HPP__
+
+#include <iostream>
+
+//
+// csl ressources
+//
+
+#include "./../csl/implementations/dummy/dummy_pin.hpp"
+
+//
+// drivers
+//
+
+#include "./../drivers/LED.hpp"
+
+struct HW_plattform
+{
+    HW_plattform():
+        pin_0(),
+        pin_1(),
+        led_0(pin_0)
+    {}
+
+    void init()
+    {
+        std::cout << "bsl init..." << std::endl;
+        pin_0.set(false);
+        pin_1.set(false);
+        std::cout << "...done!" << std::endl;
+    };
+
+    private:
+    Dummy_Pin pin_0, pin_1;
+    public:
+
+    LED<Dummy_Pin> led_0;
+};
+
+
+#endif // __HW_PLATTFORM_HPP__
diff --git a/KED_structure_idea/csl/implementations/avr/avr_pin.hpp b/KED_structure_idea/csl/implementations/avr/avr_pin.hpp
new file mode 100644
index 0000000..42c49ec
--- /dev/null
+++ b/KED_structure_idea/csl/implementations/avr/avr_pin.hpp
@@ -0,0 +1,37 @@
+#ifndef __AVR_PIN_HPP__
+#define __AVR_PIN_HPP__
+
+#include <iostream>
+#include "./../../interfaces/pin.hpp"
+
+
+
+struct AVR_Pin : Pin<AVR_Pin>
+{
+    AVR_Pin()
+    {
+        std::cout << "created AVR_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        std::cout << "AVR pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "toggled AVR pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+    void avr_stuff()
+    {
+        std::cout << "AVR specific stuff" << std::endl;
+    }
+};
+
+#endif // __AVR_PIN_HPP__
\ No newline at end of file
diff --git a/KED_structure_idea/csl/implementations/dummy/dummy_pin.hpp b/KED_structure_idea/csl/implementations/dummy/dummy_pin.hpp
new file mode 100644
index 0000000..96b1cb6
--- /dev/null
+++ b/KED_structure_idea/csl/implementations/dummy/dummy_pin.hpp
@@ -0,0 +1,38 @@
+#ifndef __DUMMY_PIN_HPP__
+#define __DUMMY_PIN_HPP__
+
+#include "./../../interfaces/pin.hpp"
+
+#include <iostream>
+
+
+struct Dummy_Pin : Pin<Dummy_Pin>
+{
+    Dummy_Pin()
+    {
+        std::cout << "created Dummy_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        std::cout << "Dummy pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "toggled Dummy pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+    void dummy_stuff()
+    {
+        std::cout << "dummy specific stuff" << std::endl;
+    }
+};
+
+
+#endif // __DUMMY_PIN_HPP__
diff --git a/KED_structure_idea/csl/implementations/stm/stm_pin.hpp b/KED_structure_idea/csl/implementations/stm/stm_pin.hpp
new file mode 100644
index 0000000..2d4cf74
--- /dev/null
+++ b/KED_structure_idea/csl/implementations/stm/stm_pin.hpp
@@ -0,0 +1,37 @@
+#ifndef __STM_PIN_HPP__
+#define __STM_PIN_HPP__
+
+#include "./../../interfaces/pin.hpp"
+
+#include <iostream>
+
+truct STM32_Pin : Pin<STM32_Pin>
+{
+    STM32_Pin()
+    {
+        std::cout << "created STM32_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        std::cout << "stm32 pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "toggled stm32 pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+
+    void STM32_stuff()
+    {
+        std::cout << "STM_32 specific stuff" << std::endl;
+    }
+};
+
+#endif // __STM_PIN_HPP__
diff --git a/KED_structure_idea/csl/interfaces/pin.hpp b/KED_structure_idea/csl/interfaces/pin.hpp
new file mode 100644
index 0000000..3c9c76d
--- /dev/null
+++ b/KED_structure_idea/csl/interfaces/pin.hpp
@@ -0,0 +1,23 @@
+#ifndef __PIN_HPP__
+#define __PIN_HPP__
+
+template <typename Derived>
+struct Pin
+{
+    void set(bool logic)
+    {
+        static_cast<Derived*>(this)->setImp(logic);
+    }
+
+    void toggle()
+    {
+        static_cast<Derived*>(this)->toggleImp();
+    }
+
+    bool get(void)
+    {
+        return static_cast<Derived*>(this)->getImp();
+    }
+};
+
+#endif // __PIN_HPP__
diff --git a/KED_structure_idea/drivers/LED.hpp b/KED_structure_idea/drivers/LED.hpp
new file mode 100644
index 0000000..dfaec72
--- /dev/null
+++ b/KED_structure_idea/drivers/LED.hpp
@@ -0,0 +1,35 @@
+#ifndef __LED_HPP__
+#define __LED_HPP__
+
+#include "./../csl/interfaces/pin.hpp"
+
+template <typename T>
+class LED
+{
+    public:
+
+    LED(Pin<T>& pin) :
+        pin(pin)
+    {}
+
+    void turnOn()
+    {
+        pin.set(true);
+    }
+
+    void turnOff()
+    {
+        pin.set(false);
+    }
+
+    void toggle()
+    {
+        pin.toggle();
+    }
+
+    private:
+
+    Pin<T>& pin;
+};
+
+#endif // __LED_HPP__
diff --git a/KED_structure_idea/main.cpp b/KED_structure_idea/main.cpp
new file mode 100644
index 0000000..522a52f
--- /dev/null
+++ b/KED_structure_idea/main.cpp
@@ -0,0 +1,16 @@
+#include <iostream>
+
+#include "./bsl/hw_plattform.hpp"
+
+
+int main()
+{
+    HW_plattform hw;
+    hw.init();
+
+    //hw.pin_1.set(true);
+
+    hw.led_0.turnOn();
+    
+    return 1;
+}
\ No newline at end of file
diff --git a/KED_structure_idea/runtest b/KED_structure_idea/runtest
new file mode 100755
index 0000000..13f81ba
Binary files /dev/null and b/KED_structure_idea/runtest differ
diff --git a/driver_dev/max31865_dev/Makefile b/driver_dev/max31865_dev/Makefile
new file mode 100644
index 0000000..38e5ad5
--- /dev/null
+++ b/driver_dev/max31865_dev/Makefile
@@ -0,0 +1,24 @@
+cpp_src = $(wildcard *.cpp) 
+cpp_src += $(wildcard ./utils/*.cpp)
+cpp_src += $(wildcard ./driver/*.cpp)
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = 
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+ 
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
diff --git a/driver_dev/max31865_dev/driver/device.cpp b/driver_dev/max31865_dev/driver/device.cpp
new file mode 100644
index 0000000..715bf1e
--- /dev/null
+++ b/driver_dev/max31865_dev/driver/device.cpp
@@ -0,0 +1,69 @@
+#include "device.hpp"
+#include <iostream>
+
+Device::Device() :
+    reg_control(0x00)
+{
+
+    std::cout << "Device::Device()" << std::endl;
+    std::cout << +reg_control.raw << std::endl;
+
+    reg_control.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_OFF;
+    reg_control.bits.SPEED = Reg_Control::SPEED::STAND_STILL;
+
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " <<+reg_control.bits.SPEED <<  std::endl;
+}
+
+void Device::doSomething()
+{
+    std::cout << "Device::doSomething()" << std::endl;
+
+    reg_control.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    reg_control.bits.SPEED = Reg_Control::SPEED::FAST;
+
+    if(reg_control.bits.POWER_DEV == Reg_Control::POWER_DEV::TURN_ON){
+        std::cout << "device turned on!" << std::endl;
+    }
+
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " << +reg_control.bits.SPEED <<  std::endl;
+     
+    std::cout << +reg_control << std::endl;
+
+    reg_control = 0;
+
+    std::cout << +reg_control << std::endl;
+
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " << +reg_control.bits.SPEED <<  std::endl;
+
+    //reg_control.bits.SPEED = Reg_Control::SPEED::FAST;
+    reg_control.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    
+    std::cout << "POWER = " << +reg_control.bits.POWER_DEV <<  std::endl;
+    std::cout << "SPEED = " << +reg_control.bits.SPEED <<  std::endl;
+
+
+
+    
+}
+
+void Device::status()
+{
+    // imitating read hardware register (for example reading from device via SPI or i2c)
+    reg_motorStatus = 0xFE;
+
+    if(reg_motorStatus.bits.POWER == Reg_MotorStatus::POWER::ON) {
+        std::cout << "Motor is Powered ON!" << std::endl;
+    } else {
+        std::cout << "Motor is Powered OFF!" << std::endl;
+    }
+
+    // will throw error because this bitfield is set const!
+    //reg_motorStatus.bits.STATUS = Reg_MotorStatus::STATUS::STANDSTILL;
+
+    std::cout << +reg_motorStatus.bits.POWER << std::endl;
+
+    std::cout << "Motor Status : " << +reg_motorStatus.bits.STATUS << std::endl;
+}
\ No newline at end of file
diff --git a/driver_dev/max31865_dev/driver/device.hpp b/driver_dev/max31865_dev/driver/device.hpp
new file mode 100644
index 0000000..2f9e1ea
--- /dev/null
+++ b/driver_dev/max31865_dev/driver/device.hpp
@@ -0,0 +1,113 @@
+#ifndef _DEVICE_HPP_
+#define _DEVICE_HPP_
+
+#include "../utils/BitField.hpp"
+
+#include <iostream>
+#include <stdint.h>
+
+class Device
+{
+    public:
+        Device();
+
+        void doSomething();
+
+        void status();
+
+    private:
+
+        //
+        //  Register declarations
+        //
+#ifdef EXAMPLE_CODE_FOR_REFERENCE
+        union Control {
+            struct OPM{
+                typedef Bits<uint16_t, 10, 2> bits;
+                enum { NO_CHANGE = 0, AS_STANDBY = 1};
+            };
+            struct CTRL_BR{
+                enum { NO_CHANGE = 0, BRANCH_NORMAL = 1};
+            };
+            struct CTRL_BR1 : CTRL_BR{
+                typedef Bits<uint16_t, 8, 2> bits;
+            };
+            struct CTRL_BR2 : CTRL_BR{
+                typedef Bits<uint16_t, 6, 2> bits;
+            };
+
+            union Bits {
+                Control::OPM::bits OPM;
+                Control::CTRL_BR1::bits CTRL_BR1;
+                Control::CTRL_BR2::bits CTRL_BR2;
+            } bits;
+            uint16_t raw;
+        };
+#endif
+        union Reg_Control
+        {
+            // bit 4
+            struct POWER_DEV{
+                typedef BitField<uint8_t, 7, 1> Bits;
+                enum{TURN_OFF = 0, TURN_ON = 1};
+            };
+            // bits 2-3
+            struct SPEED{
+                typedef BitField<uint8_t, 2, 2> Bits;
+                enum{STAND_STILL = 0,
+                     SLOW = 1,
+                     NORMAL = 2,
+                     FAST = 3};
+            };
+            union Bits{
+                Reg_Control::POWER_DEV::Bits POWER_DEV;
+                Reg_Control::SPEED::Bits SPEED;
+            } bits;
+            // raw value. all bitfields will be "unified" here ;)
+            uint8_t raw;
+            // union Ctor with default value set to 0x00
+            Reg_Control(uint8_t v = 0x00) : raw(v) {}
+            // raw value extraction of register
+            operator uint8_t() {return raw;}
+            // used for updating software immage of hardware register
+            void operator = (uint8_t v) {raw = v;}
+        };
+
+        union Reg_MotorStatus
+        {
+            struct POWER{
+                typedef BitField<uint8_t,0,1> Bits;
+                enum{OFF = 0, ON = 1};
+            };
+            struct STATUS{
+                typedef BitField<uint8_t, 2,3>Bits;
+                enum{STANDSTILL = 0,
+                     ACCELERATING_CW = 1,
+                     DEACCELERATING_CW = 2,
+                     ACCELERATING_CCW = 3,
+                     DEACCELERATING_CCW = 4,
+                     CONSTANT_SPEED = 5,
+                     BLOCKED = 6};
+            };
+            union Bits
+            {
+                // is set const because it only used for status indication
+                const Reg_MotorStatus::POWER::Bits POWER;
+                const Reg_MotorStatus::STATUS::Bits STATUS;
+            }bits;
+            uint8_t raw;
+
+            Reg_MotorStatus(uint8_t v = 0x00) : raw(v) {}
+            operator uint8_t() {return raw;}
+            void operator = (uint8_t v) {raw = v;}   
+        };
+
+        Reg_Control reg_control;
+
+        Reg_MotorStatus reg_motorStatus;
+
+
+
+};
+
+#endif // _DEVICE_HPP_
diff --git a/driver_dev/max31865_dev/driver/max31865.cpp b/driver_dev/max31865_dev/driver/max31865.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/driver_dev/max31865_dev/driver/max31865.hpp b/driver_dev/max31865_dev/driver/max31865.hpp
new file mode 100644
index 0000000..908dc3f
--- /dev/null
+++ b/driver_dev/max31865_dev/driver/max31865.hpp
@@ -0,0 +1,64 @@
+#ifdef __MAX31865_HPP_
+#define __MAX31865_HPP__
+
+#include <stdint.h>
+#include "../utils/BitFiled.hpp"
+
+
+class MAX31865
+{
+	public:
+		MAX31865();
+
+	private:
+
+		//
+		// register definitions
+		//
+
+		union CONFIG_REG {
+			struct VBIAS{
+				enum {
+					OFF = 0,
+					ON = 1
+				};
+				typedef BitField<uint8_t,7,1> Bits;
+			};
+		
+			struct CONVERSION_MODE{
+				enum {
+					OFF = 0,
+					AUTO = 1
+				};
+				typedef BitField<uint8_t,6,1> Bits;
+			};
+
+			struct ONE_SHOT{
+				enum {
+					IDLE = 0,
+					SET = 1
+				};
+				typedef BitField<uint8_t,5,1> Bits;
+			};
+			
+			struct WIRING{
+				enum {
+					TWO_OR_FOUR_WIRE = 0,
+					THREE_WIRE = 1
+				};
+				typedef BitField<uint8_t,4,1> Bits;
+			};
+			
+			struct {
+				enum {
+					IDLE = 0,
+					SET = 1
+				};
+				typedef BitField<uint8_t,5,1> Bits;
+			};
+			
+		};
+};
+
+
+#endif // __MAX31865_HPP__
diff --git a/driver_dev/max31865_dev/interfaces/i2c.cpp b/driver_dev/max31865_dev/interfaces/i2c.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/driver_dev/max31865_dev/interfaces/i2c.hpp b/driver_dev/max31865_dev/interfaces/i2c.hpp
new file mode 100644
index 0000000..e69de29
diff --git a/driver_dev/max31865_dev/main.cpp b/driver_dev/max31865_dev/main.cpp
new file mode 100644
index 0000000..ea510f1
--- /dev/null
+++ b/driver_dev/max31865_dev/main.cpp
@@ -0,0 +1,57 @@
+#include <iostream>
+#include <stdint.h>
+
+#include "./driver/device.hpp"
+#include "./utils/BitField.hpp"
+
+#ifdef SIMPLE_TEST
+
+int main(void)
+{
+    std::cout << "test" << std::endl;
+    
+    BitField<uint8_t, 1, 2> bitfield_0;
+    BitField<uint8_t, 5, 2> bitfield_1;
+
+    
+    std::cout << "testing bitfield 0" << std::endl;
+
+    for(uint8_t i = 0; i < 10; i++) {
+
+        bitfield_0 = i;
+        std::cout << static_cast<uint32_t>(bitfield_0()) << std::endl;
+    }
+
+    std::cout << "testing bitfield 1" << std::endl;
+
+    for(uint8_t i = 0; i < 10; i++) {
+
+        bitfield_1 = i;
+        std::cout << static_cast<uint32_t>(bitfield_1()) << std::endl;
+    }
+
+    Device dev();
+
+    return 0;
+}
+
+#endif
+
+
+int main(void)
+{
+    std::cout << "test" << std::endl;
+    
+    //std::cout << std::hex << ((1ULL << 2)-1) << std::endl;
+    std::cout << 1ULL << std::endl;
+
+    Device dev;
+
+    //dev.doSomething();
+
+    dev.status();
+
+    //dev.doSomething();
+
+    return 0;
+}
diff --git a/driver_dev/max31865_dev/problem_test.txt b/driver_dev/max31865_dev/problem_test.txt
new file mode 100644
index 0000000..ed7d1ee
--- /dev/null
+++ b/driver_dev/max31865_dev/problem_test.txt
@@ -0,0 +1,126 @@
+// Example program
+#include <iostream>
+#include <string>
+
+
+#include <stdint.h>
+
+/**
+ * @brief Template class for portable Bitfields
+ * 
+ * @tparam T type of variable in which the bitfield resides
+ * @tparam START bit index starting from LSB where the bitfield starts
+ * @tparam SIZE number of bits
+ */
+template<typename T, uint8_t START, uint8_t SIZE>
+struct BitField
+{   
+    /**
+     * @brief Construct a new Bit Field object
+     * 
+     */
+    BitField()
+    {
+        static_assert(SIZE != 0, "Bitfield SIZE must be > 0!");
+		static_assert(START < sizeof(T) * 8, "START exceeds number of bits of the chosen typename T!");
+    }
+    
+    /**
+     * @brief assignment operator
+     * 
+     * @param v value to be written in the bitfield
+     * @return BitField&
+     */
+    BitField& operator =(T v)
+    {
+
+#if 0
+        _raw = ((v & ((1ULL << SIZE)-1)) << START);
+        return *this;
+#else
+        //_raw & ~(((1ULL << SIZE)-1) << START);
+        
+        // use bit band alias if system permits
+        _raw = ((v & ((1ULL << SIZE)-1)) << START) | (_raw & ~(((1ULL << SIZE)-1) << START));
+        return *this;
+        //#endif
+#endif
+    }
+    
+    /**
+     * @brief return the value inside the bitfield
+     * 
+     * @return T 
+     */
+    operator T() const
+    {
+        return _raw >> START;
+    }
+    
+    /**
+     * @brief return the raw value
+     * 
+     * @return T 
+     */
+    T operator ()() const
+    {
+        return _raw;
+    }
+    
+    private:
+    T _raw;
+};
+
+union Reg_Control
+{
+    // bit 4
+    struct POWER_DEV{
+        typedef BitField<uint8_t, 7, 1> Bits;
+        enum{TURN_OFF = 0, TURN_ON = 1};
+    };
+    // bits 2-3
+    struct SPEED{
+        typedef BitField<uint8_t, 0, 2> Bits;
+        enum{STAND_STILL = 0,
+             SLOW = 1,
+             NORMAL = 2,
+             FAST = 3};
+    };
+    union Bits{
+        Reg_Control::POWER_DEV::Bits POWER_DEV;
+        Reg_Control::SPEED::Bits SPEED;
+    } bits;
+    // raw value. all bitfields will be "unified" here ;)
+    uint8_t raw;
+    // union Ctor with default value set to 0x00
+    Reg_Control(uint8_t v = 0x00) : raw(v) {}
+};
+
+
+
+int main()
+{
+    Reg_Control reg;
+    
+    //reg.bits.SPEED = Reg_Control::SPEED::FAST;
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    
+    
+    std::cout << +reg.raw << std::endl;
+    
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_OFF;
+    
+    std::cout << +reg.raw << std::endl;
+    
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_ON;
+    reg.bits.SPEED = Reg_Control::SPEED::SLOW;
+    
+    std::cout << +reg.raw << std::endl;
+    
+    reg.bits.POWER_DEV = Reg_Control::POWER_DEV::TURN_OFF;
+    reg.bits.SPEED = Reg_Control::SPEED::FAST;
+    
+    std::cout << +reg.raw << std::endl;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/driver_dev/max31865_dev/runtest b/driver_dev/max31865_dev/runtest
new file mode 100755
index 0000000..5dfe56a
Binary files /dev/null and b/driver_dev/max31865_dev/runtest differ
diff --git a/driver_dev/max31865_dev/utils/BitField.hpp b/driver_dev/max31865_dev/utils/BitField.hpp
new file mode 100644
index 0000000..7b36c16
--- /dev/null
+++ b/driver_dev/max31865_dev/utils/BitField.hpp
@@ -0,0 +1,79 @@
+/**
+ * @file BitField.h
+ * @author Edwin Koch (eddyed.k@gmail.com)
+ * @brief 
+ * @version 0.1
+ * @date 2020-12-19
+ * 
+ * @copyright Copyright (c) 2020
+ * 
+ */
+
+// Based on:
+// https://www.youtube.com/watch?v=TYqbgvHfxjM
+// https://stackoverflow.com/questions/31726191/is-there-a-portable-alternative-to-c-bitfields
+// https://stackoverflow.com/questions/1392059/algorithm-to-generate-bit-mask
+
+#ifndef _BITFIELDS_HPP_
+#define _BITFIELDS_HPP_
+
+#include <stdint.h>
+
+/**
+ * @brief Template class for portable Bitfields
+ * 
+ * @tparam T type of variable in which the bitfield resides
+ * @tparam START bit index starting from LSB where the bitfield starts
+ * @tparam SIZE number of bits
+ */
+template<typename T, uint8_t START, uint8_t SIZE>
+struct BitField
+{   
+    /**
+     * @brief Construct a new Bit Field object
+     * 
+     */
+    BitField()
+    {
+        static_assert(SIZE != 0, "Bitfield SIZE must be > 0!");
+		static_assert(START < sizeof(T) * 8, "START exceeds number of bits of the chosen typename T!");
+    }
+    
+    /**
+     * @brief assignment operator
+     * 
+     * @param v value to be written in the bitfield
+     * @return BitField&
+     */
+    BitField& operator =(T v)
+    {
+        // use bit band alias if system permits
+        _raw = ((v & ((1ULL << SIZE)-1)) << START) | (_raw & ~(((1ULL << SIZE)-1) << START));
+        return *this;
+    }
+    
+    /**
+     * @brief return the value inside the bitfield
+     * 
+     * @return T 
+     */
+    operator T() const
+    {
+        return (_raw >> START) & ((1ULL << SIZE) - 1);
+    }
+    
+    /**
+     * @brief return the raw value
+     * 
+     * @return T 
+     */
+    T operator ()() const
+    {
+        return (_raw >> START) & ((1ULL << SIZE) - 1);
+    }
+    
+    private:
+    T _raw;
+};
+
+#endif // _BITFIELDS_HPP_
\ No newline at end of file
diff --git a/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/Makefile b/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/Makefile
new file mode 100644
index 0000000..38e5ad5
--- /dev/null
+++ b/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/Makefile
@@ -0,0 +1,24 @@
+cpp_src = $(wildcard *.cpp) 
+cpp_src += $(wildcard ./utils/*.cpp)
+cpp_src += $(wildcard ./driver/*.cpp)
+
+cpp_obj = $(cpp_src:.cpp=.o)
+c_obj = $(c_src:.c=.o)
+CC = g++ 
+CFLAGS = -Wall -pedantic -li2c 
+LDFLAGS = 
+EXEC = runtest
+
+
+all : $(EXEC)
+
+$(EXEC): $(cpp_obj) $(c_obj)
+	$(CC) -o $@ $^ $(LDFLAGS) 
+ 
+clean: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
+
+cleanall: 
+	rm -rf $(c_obj) $(cpp_obj) $(EXEC)
+	clear
diff --git a/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/main.cpp b/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/main.cpp
new file mode 100644
index 0000000..4bbbd67
--- /dev/null
+++ b/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/main.cpp
@@ -0,0 +1,138 @@
+#include <memory>
+#include <iostream>
+
+// https://www.modernescpp.com/index.php/c-is-still-lazy
+
+//
+//  CRTP base class of pin
+//
+
+/*
+    avoiding virtual call (static polymorphism)
+*/
+
+template <typename Derived>
+struct PinBase
+{
+    void set(bool logic)
+    {
+        static_cast<Derived*>(this)->setImp(logic);
+    }
+
+    void toggle()
+    {
+        static_cast<Derived*>(this)->toggleImp();
+    }
+
+    bool get(void)
+    {
+        return static_cast<Derived*>(this)->getImp();
+    }
+
+    private:
+
+    //
+    // base implementations
+    //
+
+    void setImp()
+    {
+        std::cout << "base implementation of set()!" << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "base implementation of toggle()!" << std::endl;
+    }
+
+    bool getImp(void)
+    {
+        std::cout << "base implementation of get()!" << std::endl;
+        return true;
+    }
+};
+
+//
+//  implementations
+//
+
+struct STM32_Pin : PinBase<STM32_Pin>
+{
+    STM32_Pin()
+    {
+        std::cout << "created STM32_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        std::cout << "stm32 pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "toggled stm32 pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+
+    void STM32_stuff()
+    {
+        std::cout << "STM_32 specific stuff" << std::endl;
+    }
+};
+
+struct AVR_Pin : PinBase<AVR_Pin>
+{
+    AVR_Pin()
+    {
+        std::cout << "created AVR_Pin" << std::endl;
+    }
+
+    void setImp(bool logic)
+    {
+        std::cout << "AVR pin set to " << logic << std::endl;
+    }
+
+    void toggleImp()
+    {
+        std::cout << "toggled AVR pin" << std::endl;
+    }
+
+    bool getImp()
+    {
+        return true;
+    }
+
+    void avr_stuff()
+    {
+        std::cout << "AVR specific stuff" << std::endl;
+    }
+};
+
+template<typename T>
+void foo(T& base)
+{
+    base.set(true);
+    base.set(false);
+    base.toggle();
+}
+
+int main(void)
+{
+    STM32_Pin pin1;
+    AVR_Pin pin2;
+
+
+    pin1.STM32_stuff();
+
+    pin2.avr_stuff();
+
+    foo(pin1);
+    foo(pin2);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/runtest b/scribbles_and_notes/pin_interface_CRTP_style/pin_modleing_with_CRTP/runtest
new file mode 100755
index 0000000..12fab27
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