First steps

Labware/Lab9_FunctionalDebugging/main.c

@@ -11,6 +11,7 @@
 // ***** 1. Pre-processor Directives Section *****
 #include "TExaS.h"
 #include "tm4c123gh6pm.h"
+#include <stdbool.h>
 
 // ***** 2. Global Declarations Section *****
 
@@ -24,17 +25,22 @@ void EnableInterrupts(void);  // Enable interrupts
 
 /* 
 This Lab9 starter project is the same as C9_Debugging example but 
-includes the connections to the Lab9 grader. You will make three changes. 
+includes the connections to the Lab9 grader. You will make three changes.
+
 First, make the LED flash at 10 Hz. In other words, make it turn on for 0.05 seconds, 
-and then turn off for 0.05 seconds. 
+and then turn off for 0.05 seconds.
+
 Second, make the LED flash if either switch SW1 or SW2 is pressed 
 (this means flash the LED if either PF4 or PF0 is 0). 
+
 Third, record PortF bits 4,1,0 every time the input changes or the output changes. 
 For example, if your system detects a change in either PF4 or PF0 input, 
 record PortF bits 4,1,0. If your system causes a change in PF1, record PortF bits 4,1,0. 
 
-If both PF4 and PF0 switch are not pressed, the PF1 output should be low.  
-If either PF4 or PF0 switches is pressed, the output toggles at 10 Hz (±10%). 
+If both PF4 and PF0 switch are not pressed, the PF1 output should be low. 
+
+If either PF4 or PF0 switches is pressed, the output toggles at 10 Hz (�10%). 
+
 Information collected in the Data array matches the I/O on PortF.
 50 data points are collected only on a change in input or a change in output.
 This means no adjacent elements in the array should be equal.
@@ -65,7 +71,7 @@ void SysTick_Init(void){
 }
 unsigned long Led;
 void Delay(void){unsigned long volatile time;
-  time = 160000; // 0.1sec
+  time = 80000; // 0.05 sec
   while(time){
    time--;
   }
@@ -75,16 +81,26 @@ unsigned long Time[50];
 // you must leave the Data array defined exactly as it is
 unsigned long Data[50];
 int main(void){  unsigned long i,last,now;
+  bool changed;
   TExaS_Init(SW_PIN_PF40, LED_PIN_PF1);  // activate grader and set system clock to 16 MHz
   PortF_Init();   // initialize PF1 to output
   SysTick_Init(); // initialize SysTick, runs at 16 MHz
   i = 0;          // array index
+  changed = false;
   last = NVIC_ST_CURRENT_R;
   EnableInterrupts();           // enable interrupts for the grader
   while(1){
-    Led = GPIO_PORTF_DATA_R;   // read previous
-    Led = Led^0x02;            // toggle red LED
-    GPIO_PORTF_DATA_R = Led;   // output 
+    if(!(GPIO_PORTF_DATA_R&0x01) || !(GPIO_PORTF_DATA_R&0x10)){ // PF0 or PF4
+      Led = GPIO_PORTF_DATA_R;   // read previous
+      Led = Led^0x02;            // toggle red LED
+      GPIO_PORTF_DATA_R = Led;   // output
+      changed = true;
+    }
+    else {
+       //disable LED if nothing is pressed
+      GPIO_PORTF_DATA_R &=~0x02;
+		}
+    
     if(i<50){
       now = NVIC_ST_CURRENT_R;
       Time[i] = (last-now)&0x00FFFFFF;  // 24-bit time difference