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#include "trafficlight.h"
uint32_t period_1 = RED_PERIOD;
uint32_t period_2 = GREEN_PERIOD;
uint32_t period_3 = RED_PERIOD;
Traffic tf1 = {RED, GPIO_PORTF_BASE, 1, 2, 3};
Traffic tf2 = {YELLOW, GPIO_PORTA_BASE, 2, 3, 4};
Traffic tf_ped = {RED, GPIO_PORTB_BASE, 5, 0, 1};
void Switch_Handler() {
}
void Timer0_Handler() {
TimerIntClear(TIMER0_BASE, TIMER_BOTH);
switch(tf1.cur_color) {
case RED:
tf1.cur_color = GREEN;
set_tf_color(tf1, GREEN);
TimerLoadSet(TIMER0_BASE, TIMER_BOTH, GREEN_PERIOD);
break;
case YELLOW:
tf1.cur_color = RED;
set_tf_color(tf1, RED);
TimerLoadSet(TIMER0_BASE, TIMER_BOTH, RED_PERIOD);
break;
case GREEN:
tf1.cur_color = YELLOW;
set_tf_color(tf1, YELLOW);
TimerLoadSet(TIMER0_BASE, TIMER_BOTH, YELLOW_PERIOD);
break;
}
}
void Timer1_Handler() {
TimerIntClear(TIMER1_BASE, TIMER_BOTH);
switch(tf2.cur_color) {
case RED:
tf2.cur_color = GREEN;
set_tf_color(tf2, GREEN);
TimerLoadSet(TIMER1_BASE, TIMER_BOTH, GREEN_PERIOD);
break;
case YELLOW:
tf2.cur_color = RED;
set_tf_color(tf2, RED);
TimerLoadSet(TIMER1_BASE, TIMER_BOTH, RED_PERIOD);
break;
case GREEN:
tf2.cur_color = YELLOW;
set_tf_color(tf2, YELLOW);
TimerLoadSet(TIMER1_BASE, TIMER_BOTH, YELLOW_PERIOD);
break;
}
}
void Timer2_Handler() {
TimerIntClear(TIMER2_BASE, TIMER_BOTH);
switch(tf_ped.cur_color) {
case RED:
tf_ped.cur_color = GREEN;
set_tf_color(tf_ped, GREEN);
TimerLoadSet(TIMER2_BASE, TIMER_BOTH, GREEN_PERIOD);
break;
case YELLOW:
tf_ped.cur_color = RED;
set_tf_color(tf_ped, RED);
TimerLoadSet(TIMER2_BASE, TIMER_BOTH, RED_PERIOD);
break;
case GREEN:
tf_ped.cur_color = YELLOW;
set_tf_color(tf_ped, YELLOW);
TimerLoadSet(TIMER2_BASE, TIMER_BOTH, YELLOW_PERIOD);
break;
}
}
int main()
{
PortInit(GPIO_PORTF_BASE, SYSCTL_PERIPH_GPIOF); // Initialize portf
PortInit(GPIO_PORTA_BASE, SYSCTL_PERIPH_GPIOA); // Initialize porta
PortInit(GPIO_PORTB_BASE, SYSCTL_PERIPH_GPIOB); // Initialize portb
__asm("CPSID I"); // Disable all interrupts
TimerInit(TIMER0_BASE, Timer0_Handler, SYSCTL_PERIPH_TIMER0, period_1); // Intialize Timer0 with period_1
TimerInit(TIMER1_BASE, Timer1_Handler, SYSCTL_PERIPH_TIMER1, period_2); // Intialize Timer1 with period_2
TimerInit(TIMER2_BASE, Timer2_Handler, SYSCTL_PERIPH_TIMER2, period_3); // Intialize Timer1 with period_2
__asm("CPSIE I"); // Enable all interrupts
while(1) {
__asm("wfi"); // power saving mode
}
}
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