Final version

Labware/Lab9_FunctionalDebugging/main.c

@@ -90,7 +90,8 @@ int main(void){  unsigned long i,last,now;
   last = NVIC_ST_CURRENT_R;
   EnableInterrupts();           // enable interrupts for the grader
   while(1){
-    if(!(GPIO_PORTF_DATA_R&0x01) || !(GPIO_PORTF_DATA_R&0x10)){ // PF0 or PF4
+		//either PF4 or PF0 is 0
+    if(!(GPIO_PORTF_DATA_R&0x01) || !(GPIO_PORTF_DATA_R&0x10)){
       Led = GPIO_PORTF_DATA_R;   // read previous
       Led = Led^0x02;            // toggle red LED
       GPIO_PORTF_DATA_R = Led;   // output
@@ -100,11 +101,11 @@ int main(void){  unsigned long i,last,now;
        //disable LED if nothing is pressed
       GPIO_PORTF_DATA_R &=~0x02;
 		}
-    
-    if(i<50){
+    if(i<50 && changed){
+      changed = false;
       now = NVIC_ST_CURRENT_R;
       Time[i] = (last-now)&0x00FFFFFF;  // 24-bit time difference
-      Data[i] = GPIO_PORTF_DATA_R&0x02; // record PF1
+      Data[i] = GPIO_PORTF_DATA_R&0x13; // record PF4,1,0
       last = now;
       i++;
     }