first draft of rising edge interrupt on pinA4. Does not comile yet!

main.c

@@ -6,10 +6,56 @@
 #include "timer.h"
 #include "i2c.h"
 
+#include "hardwareDescription.h"
+
+void setup();
+
+void EXTI3_IRQHandler(void)
+{
+	if((EXTI->PR1 & EXTI_PR1_PIF4) != 0) {
+		
+		pinToggle(pinB3);
+		
+		// clear flag
+		EXTI->PR1 |= EXTI_PR1_PIF4;
+	}
+}
 
 int main(int argc, char *argv[])
 {
+	setup();
+	
+	pinConfig(pinB4, input, def_stage, pullUp, def_speed);
+	// enable interrupt
+	NVIC_EnableIRQ(EXTI4_IRQn);
 	
+
+	// Connect
+	RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN;
+	SYSCFG->EXTICR[0] &= ~SYSCFG_EXTICR1_EXTI4;
+	SYSCFG->EXTICR[0] |= SYSCFG_EXTICR1_EXTI4_PA;
+
+	// rising trigger selection
+	EXTI->RTSR1 |= EXTI_RTSR1_RT4;
+
+	// Interrupt mask register
+	EXTI->IMR1 |= EXTI_IMR1_IM4;
+	
+
+	while(1);
+/*
+	while(1)
+	{
+		delayMs(100); 
+		pinToggle(pinB3);
+		delayMs(100); 
+	}
+*/	
+	return 1;
+}
+
+void setup()
+{
 	uint8_t i = 0;
 
 	delayInitMs(8000000, 1000); // Clock Freq and Divider for ARM library 
@@ -40,15 +86,6 @@ int main(int argc, char *argv[])
 	}
 
 	pinWrite(pinB3,0);
-
-
-	while(1)
-	{
-		delayMs(100); 
-		pinToggle(pinB3);
-		delayMs(100); 
-	}
-	
-	return 1;
 }
 
+