PLaying around with function pointers

env/parser/config.json

@@ -0,0 +1,95 @@
+{
+  "organization": "freeCodeCamp",
+  "website": "https://www.freecodecamp.org/",
+  "formed": 2014,
+  "founder": "Quincy Larson",
+  "certifications": [
+
+    {
+      "name": "Responsive Web Design",
+      "courses": [
+        "HTML",
+        "CSS"
+      ]
+    },
+    {
+      "name": "JavaScript Algorithms and Data Structures",
+      "courses": [
+        "JavaScript"
+      ]
+    },
+    {
+      "name": "Front End Development Libraries",
+      "courses": [
+        "Bootstrap",
+        "jQuery",
+        "Sass",
+        "React",
+        "Redux"
+      ]
+    },
+    {
+      "name": "Data Visualization",
+      "courses": [
+        "D3"
+      ]
+    },
+    {
+      "name": "Relational Database Course",
+      "courses": [
+        "Linux",
+        "SQL",
+        "PostgreSQL",
+        "Bash Scripting",
+        "Git and GitHub",
+        "Nano"
+      ]
+    },
+    {
+      "name": "Back End Development and APIs",
+      "courses": [
+        "MongoDB",
+        "Express",
+        "Node",
+        "NPM"
+      ]
+    },
+    {
+      "name": "Quality Assurance",
+      "courses": [
+        "Testing with Chai",
+        "Express",
+        "Node"
+      ]
+    },
+
+    {
+      "name": "Scientific Computing with Python",
+      "courses": [
+        "Python"
+      ]
+    },
+    {
+      "name": "Data Analysis with Python",
+      "courses": [
+        "Numpy",
+        "Pandas",
+        "Matplotlib",
+        "Seaborn"
+      ]
+    },
+    {
+      "name": "Information Security",
+      "courses": [
+        "HelmetJS"
+      ]
+    },
+    {
+      "name": "Machine Learning with Python",
+      "courses": [
+        "Machine Learning",
+        "TensorFlow"
+      ]
+    }
+  ]
+}

env/parser/parser.py

@@ -0,0 +1,9 @@
+import json
+
+
+with open('config.json', 'r') as config_file:
+    config_data = json.load(config_file)  
+   # print(config_data)
+   # print(json.dumps(config_data, indent=4))
+    print(json.dumps(config_data, indent=4, sort_keys=True))
+   

libraries/function_pointer/graphics.c

@@ -1,17 +1,14 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
 #include "graphics.h"
 
-display_s *display; 
+display_s *lcd;
 
-void init_lcd(display_s *d)
+void display_init(display_s *d)
 {
-	display = d;
+	lcd = d;
+	printf("LCD : Init Ok\n");
 }
 
-void print_lcd( int val)
+void display_print(int val)
 {
-	display->print(val);
+	lcd->print(val);
 }

libraries/function_pointer/graphics.h

@@ -1,8 +1,52 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
 typedef struct display
 {
     int size_x,size_y;
+	void (*enable)();
+	void (*disable)();
+
+	void (*reset_hard)();
+	void (*reset_soft)();
+
+	uint8_t (*is_ready)();
+
+	void (*sleep)();
+	void (*wake)();
+
+	void (*draw_pixel)(uint16_t, uint16_t, uint8_t); 
+	void (*draw_line)(uint16_t, uint16_t, uint16_t, uint16_t, uint8_t); 
+	void (*draw_rectangle)(uint16_t, uint16_t, uint16_t, uint16_t, uint8_t, uint8_t);
+	void (*draw_circle)(uint16_t, uint16_t, uint16_t, uint8_t, uint8_t); 
+
+	void (*scroll_right)(uint16_t, uint16_t);
+	void (*scroll_left)(uint16_t, uint16_t);
+
+	void (*scroll_up)(uint16_t, uint16_t);
+	void (*scroll_down)(uint16_t, uint16_t);
+
+	void (*set_font)(uint8_t*, uint8_t, uint8_t spacing); 
+	void (*print_char)(uint16_t, uint16_t, uint8_t, uint8_t); 
+	void (*print_text)(uint16_t, uint16_t, uint8_t, uint16_t, uint8_t);
+	void (*print_cursor)(uint8_t); 
+
+	void (*goto_pos)(uint16_t, uint16_t);
+
+	uint8_t (*display)();
+	uint8_t (*clear)();
+
+	void (*change_brightness)(uint8_t); 
+	void (*change_contrast)(uint8_t); 
+
+	void (*rotate)(uint8_t); 
+	void (*inverse)(uint8_t); 
+	void (*invert)(uint8_t); 
     void (*print)(int);
 } display_s;
 
-void init_lcd(display_s *d);
-void print_lcd(int val);
+void display_init(display_s *d);
+void display_print(int val);
+

libraries/function_pointer/main.c

@@ -1,19 +1,16 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "ui.h"
 
-#include "oled.h"
+
+display_s display; 
 
 int main()
 {
-
-	display_s display = oled_init();  
-	init_lcd(&display);
-
-   	void (*print_ptr)(int) = &oled_print;
-    
-	(*print_ptr)(20);
-	display.print(40);
-	print_lcd(10);
-    return 0;
+	oled_init(&display);
+	display_init(&display);
+	ui_print_number(50); 
+	display_print(10);  
+	return 0;
 }

libraries/function_pointer/oled.c

@@ -1,22 +1,18 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
 #include "oled.h"
 
-
 void oled_print(int a)
 {
-    printf("Value of a is %d\n", a);
+    printf("oled_print(int a) :  %d\n", a);
 }
 
-display_s oled_init()
+void oled_init(display_s *lcd)
 {
-	display_s *lcd = malloc(sizeof(display_s)); 
 	lcd->size_x = 10; 
 	lcd->size_y = 20; 
     lcd->print = &oled_print;
 	
-	printf("LCD_OLED : Init Ok\n");
-	return *lcd;
+	printf("LCD_OLED_REG : Init Ok\n");
 }

libraries/function_pointer/oled.h

@@ -1,6 +1,9 @@
-
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "graphics.h"
 
-display_s oled_init();
+void oled_init(display_s *lcd);
 void oled_print(int a);
 

libraries/function_pointer/ui.c

@@ -0,0 +1,7 @@
+#include "ui.h"
+
+void ui_print_number(int num)
+{
+	printf("UI : Init Ok\n");
+	display_print(33);
+}

libraries/function_pointer/ui.h

@@ -0,0 +1,9 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "oled.h"
+
+void ui_print_number(int num); 
+void ui_init(); 
+