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#include "color.h"
#include "stdio.h"
#include <stdint.h>
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);
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOF)) {};
GPIOUnlockPin(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4);
GPIOPinTypeGPIOInput(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3);
GPIOPadConfigSet (GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4,
GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);
}
void traffic_delay() {
portFInit();
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()
{
traffic_delay();
}
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