First steps

Labware/Lab9_FunctionalDebugging/main.c

@@ -11,6 +11,7 @@
 // ***** 1. Pre-processor Directives Section *****
 // ***** 1. Pre-processor Directives Section *****
 #include "TExaS.h"
 #include "TExaS.h"
 #include "tm4c123gh6pm.h"
 #include "tm4c123gh6pm.h"
+#include <stdbool.h>
 
 
 // ***** 2. Global Declarations Section *****
 // ***** 2. Global Declarations Section *****
 
 
@@ -25,16 +26,21 @@ void EnableInterrupts(void);  // Enable interrupts
 /* 
 /* 
 This Lab9 starter project is the same as C9_Debugging example but 
 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, 
 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 
 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). 
 (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. 
 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, 
 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. 
 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 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 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.
 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.
 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.
 This means no adjacent elements in the array should be equal.
@@ -65,7 +71,7 @@ void SysTick_Init(void){
 }
 }
 unsigned long Led;
 unsigned long Led;
 void Delay(void){unsigned long volatile time;
 void Delay(void){unsigned long volatile time;
-  time = 160000; // 0.1sec
+  time = 80000; // 0.05 sec
   while(time){
   while(time){
    time--;
    time--;
   }
   }
@@ -75,16 +81,26 @@ unsigned long Time[50];
 // you must leave the Data array defined exactly as it is
 // you must leave the Data array defined exactly as it is
 unsigned long Data[50];
 unsigned long Data[50];
 int main(void){  unsigned long i,last,now;
 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
   TExaS_Init(SW_PIN_PF40, LED_PIN_PF1);  // activate grader and set system clock to 16 MHz
   PortF_Init();   // initialize PF1 to output
   PortF_Init();   // initialize PF1 to output
   SysTick_Init(); // initialize SysTick, runs at 16 MHz
   SysTick_Init(); // initialize SysTick, runs at 16 MHz
   i = 0;          // array index
   i = 0;          // array index
+  changed = false;
   last = NVIC_ST_CURRENT_R;
   last = NVIC_ST_CURRENT_R;
   EnableInterrupts();           // enable interrupts for the grader
   EnableInterrupts();           // enable interrupts for the grader
   while(1){
   while(1){
+    if(!(GPIO_PORTF_DATA_R&0x01) || !(GPIO_PORTF_DATA_R&0x10)){ // PF0 or PF4
       Led = GPIO_PORTF_DATA_R;   // read previous
       Led = GPIO_PORTF_DATA_R;   // read previous
       Led = Led^0x02;            // toggle red LED
       Led = Led^0x02;            // toggle red LED
       GPIO_PORTF_DATA_R = Led;   // output
       GPIO_PORTF_DATA_R = Led;   // output
+      changed = true;
+    }
+    else {
+       //disable LED if nothing is pressed
+      GPIO_PORTF_DATA_R &=~0x02;
+		}
+    
     if(i<50){
     if(i<50){
       now = NVIC_ST_CURRENT_R;
       now = NVIC_ST_CURRENT_R;
       Time[i] = (last-now)&0x00FFFFFF;  // 24-bit time difference
       Time[i] = (last-now)&0x00FFFFFF;  // 24-bit time difference