diff --git a/csl/stm32f042k6t6/HardwareDescription/hwd_interrupt.h b/csl/stm32f042k6t6/HardwareDescription/hwd_interrupt.h
index 67fcdf0..57e9829 100644
--- a/csl/stm32f042k6t6/HardwareDescription/hwd_interrupt.h
+++ b/csl/stm32f042k6t6/HardwareDescription/hwd_interrupt.h
@@ -67,7 +67,7 @@ typedef enum {
 	intTypeEND
 }intrType_t;
 
-uint32_t intHandlerList[intTypeEND]={0};
+static uint32_t intHandlerList[intTypeEND]={0};
 
 static const uint8_t interruptTypeIndexList[intTypeEND] =
 {
diff --git a/csl/stm32f042k6t6/implementation/imp_timer.c b/csl/stm32f042k6t6/implementation/imp_timer.c
index 85aa4ba..d60d8e1 100644
--- a/csl/stm32f042k6t6/implementation/imp_timer.c
+++ b/csl/stm32f042k6t6/implementation/imp_timer.c
@@ -226,7 +226,7 @@ void timerSetPs(timerNo_t timer, uint16_t ps)
 	
 }
  
-void timerSart(timerNo_t timer)
+void timerStart(timerNo_t timer)
 {
 	timerEnable(timer);
 }
diff --git a/env/doc/README.md b/env/doc/README.md
deleted file mode 100644
index e69de29..0000000
diff --git a/peripherals/timer/timer.h b/peripherals/timer/timer.h
index 3dd2730..929d8be 100644
--- a/peripherals/timer/timer.h
+++ b/peripherals/timer/timer.h
@@ -207,7 +207,7 @@ void timerSetPs(timerNo_t timer, uint16_t ps);
  * @brief Enables the timer  
  * @param timer The desired timer number
  */
-void timerSart(timerNo_t timer);
+void timerStart(timerNo_t timer);
 
 /*!
  * @brief Disables the timer