Added initial code + Made the led stay green for 5 seconds then yellow for 2 seconds then red

1 files changed, 45 insertions, 24 deletions

diff --git a/main.c b/main.c
index c076e22..7dbc47a 100644
--- a/main.c
+++ b/main.c
@@ -1,8 +1,37 @@
 #include "color.h"

-#include "systick.h"

 #include "stdio.h"

+#include <stdint.h>

 

-int cnt = 0;

+int cnt = 1;

+#define GREEN_PERIOD 80000000

+#define YELLOW_PERIOD 48000000

+#define RED_PERIOD 16000000

+uint8_t cur_color = GREEN;

+uint32_t period = GREEN_PERIOD;

+

+

+

+

+void Timer0_Handler() {

+  TimerIntClear(TIMER0_BASE, TIMER_BOTH);

+  switch(cur_color) {

+    case RED: 

+      cur_color = GREEN;

+      set_color(cur_color);

+      TimerLoadSet(TIMER0_BASE, TIMER_BOTH, GREEN_PERIOD);

+      break;

+    case YELLOW: 

+      cur_color = RED;

+      set_color(cur_color);

+      TimerLoadSet(TIMER0_BASE, TIMER_BOTH, RED_PERIOD);

+      break;

+    case GREEN: 

+      cur_color = YELLOW;

+      set_color(cur_color);

+      TimerLoadSet(TIMER0_BASE, TIMER_BOTH, YELLOW_PERIOD);

+      break;

+  }

+}

 

 void portFInit() {

   SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

@@ -13,34 +42,26 @@ void portFInit() {
   GPIOPadConfigSet (GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4,

   GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);

 }

-

-void toggle_white() {

-  if((GPIO_PORTF_DATA_R & 0xe) == 0xe) {

-    reset_color();

-  } else {

-    set_color(WHITE);

-  }

-}

-

-void SysTick_Handler() {

-  cnt++;

-  if(cnt % 5 == 0) {

-    toggle_color(WHITE);

-  }

-}

-

-void toggle_interrupts() {

+void traffic_delay() {

   portFInit();

-  SysTickDisable();

-  SysTickPeriodSet(PERIOD);

-  SysTickIntEnable();

-  SysTickEnable();

+  reset_color();

+  SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);

+  while(!SysCtlPeripheralReady(SYSCTL_PERIPH_TIMER0)) {}

+  TimerDisable(TIMER0_BASE, TIMER_BOTH);

+  TimerConfigure(TIMER0_BASE, (TIMER_CFG_PERIODIC));

+  TimerLoadSet(TIMER0_BASE, TIMER_BOTH, period);

+  TimerIntUnregister(TIMER0_BASE, TIMER_BOTH);

+  TimerEnable(TIMER0_BASE, TIMER_BOTH);

+  set_color(GREEN);

+  TimerIntRegister(TIMER0_BASE, TIMER_BOTH, (*Timer0_Handler));

+  TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT | TIMER_TIMB_TIMEOUT);

   while(1) {

 

   }

+

 }

 

 int main()

 {

-  toggle_interrupts();

+  traffic_delay();

 }