solved some mistakes... not yet working!

main.c

@@ -12,7 +12,7 @@
 volatile uint8_t led_on;
 
 void setup();
-
+#if 0
 void EXTI0_1_IRQHandler(void)
 {
 	if(EXTI->PR & EXTI_PR_PIF1) {
@@ -52,7 +52,7 @@ void risingEdgeInterruptPinA1()
 		}
 	}
 }
-
+#endif
 void interruptLEDtoggleOnTIM1counterCompare()
 {
 	//timerInitCounter(timer_2, 0xFFFF, 0, upCounting);
@@ -60,6 +60,8 @@ void interruptLEDtoggleOnTIM1counterCompare()
 	// reset timer 2 periperal
 	RCC->APB1RSTR |= RCC_APB1RSTR_TIM2RST;
 	
+	//while(RCC->APB1RSTR & RCC_APB1RSTR_TIM2RST);
+
 	// enable timer 2 peripheral
 	RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;
 
@@ -69,6 +71,8 @@ void interruptLEDtoggleOnTIM1counterCompare()
 	// only allow under-/overflow interrupts
 	TIM2->CR1 |= TIM_CR1_URS;
 
+	TIM2->CR1 |= TIM_CR1_DIR;
+
 	// set clock prescaler	
 	TIM2->PSC = 0xFFFF;
 
@@ -84,6 +88,7 @@ void interruptLEDtoggleOnTIM1counterCompare()
 	NVIC_SetPriority(TIM2_IRQn,0);
 	NVIC_EnableIRQ(TIM2_IRQn);
 
+	// timer enable	
 	TIM2->CR1 |= TIM_CR1_CEN;
 
 	//timerSart(timer_2);
@@ -103,8 +108,10 @@ void interruptLEDtoggleOnTIM1counterCompare()
 void TIM2_IRQHandler(void)
 {
 	if(TIM2->SR & TIM_SR_UIF) {
+		
 		// clear flag
 		TIM2->SR &= ~TIM_SR_UIF;
+		
 		//pinWrite(pinB3,1);
 		pinToggle(pinB3);
 	}
@@ -115,7 +122,6 @@ int main(int argc, char *argv[])
 {
 	setup();
 
-	//risingEdgeInterruptPinA1();
 	interruptLEDtoggleOnTIM1counterCompare();
 
 	while(1);