diff options
Diffstat (limited to 'trafficlight.c')
| -rw-r--r-- | trafficlight.c | 122 |
1 files changed, 112 insertions, 10 deletions
diff --git a/trafficlight.c b/trafficlight.c index eff06fb..9adf380 100644 --- a/trafficlight.c +++ b/trafficlight.c @@ -1,8 +1,7 @@ #include "trafficlight.h" - void set_tf_color(Traffic tf, uint8_t color) { - uint32_t pins = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6; + uint32_t pins = 0xFF; switch (color) { case RED: GPIOPinWrite(tf.port, pins, (1 << tf.red)); @@ -16,21 +15,18 @@ void set_tf_color(Traffic tf, uint8_t color) { } } -void PortInit(uint32_t port, uint32_t clk) { - uint32_t pins = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6; +void PortInit(uint32_t port, uint32_t clk, uint32_t input, uint32_t output) { + uint32_t pins = 0xFF; SysCtlPeripheralEnable(clk); while(!SysCtlPeripheralReady(clk)) {}; GPIOUnlockPin(port, pins); - // GPIOPinTypeGPIOInput(port, GPIO_PIN_0); - GPIOPinTypeGPIOOutput(port, pins); - GPIOPadConfigSet (port, GPIO_PIN_0 | GPIO_PIN_4 | GPIO_PIN_5, + GPIOPinTypeGPIOInput(port, input); + GPIOPinTypeGPIOOutput(port, output); + GPIOPadConfigSet (port, pins, GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU); } - - void TimerInit(uint32_t timer, void(*timer_handler)(), uint32_t clk, uint32_t delay) { - reset_color(); SysCtlPeripheralEnable(clk); while(!SysCtlPeripheralReady(clk)) {} TimerDisable(timer, TIMER_BOTH); @@ -42,4 +38,110 @@ void TimerInit(uint32_t timer, void(*timer_handler)(), uint32_t clk, uint32_t de TimerIntEnable(timer, TIMER_TIMA_TIMEOUT | TIMER_TIMB_TIMEOUT); } +void Timer0_Handler() { + TimerIntClear(TIMER0_BASE, TIMER_BOTH); + if(switch_pressed) { + set_tf_color(tf1, RED); + } else { + 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); + if(switch_pressed) { + set_tf_color(tf2, RED); + } else { + 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: + set_tf_color(tf1, tf1.cur_color); + set_tf_color(tf2, tf2.cur_color); + set_tf_color(tf_ped, RED); + TimerEnable(TIMER0_BASE, TIMER_BOTH); + TimerEnable(TIMER1_BASE, TIMER_BOTH); + switch_pressed = false; + break; + case GREEN: + tf_ped.cur_color = YELLOW; + set_tf_color(tf_ped, YELLOW); + TimerLoadSet(TIMER2_BASE, TIMER_BOTH, YELLOW_PERIOD); + break; + } +} + +void Switch_Handler() { + GPIOIntClear(GPIO_PORTF_BASE, GPIO_PIN_0); + switch_pressed = true; + tf1.prevPeriod = TimerValueGet(tf1.port, TIMER_A); + tf2.prevPeriod = TimerValueGet(tf2.port, TIMER_A); + TimerDisable(TIMER0_BASE, TIMER_BOTH); + TimerDisable(TIMER1_BASE, TIMER_BOTH); + set_tf_color(tf1, RED); + set_tf_color(tf2, RED); + set_tf_color(tf_ped, GREEN); + tf_ped.cur_color = RED; + TimerInit(TIMER2_BASE, Timer2_Handler, SYSCTL_PERIPH_TIMER2, GREEN_PERIOD); // Intialize Timer2 with period_3 +} +void TrafficInit() { + PortInit(GPIO_PORTF_BASE, SYSCTL_PERIPH_GPIOF, 0x1, 0x7E); // Initialize portf + PortInit(GPIO_PORTA_BASE, SYSCTL_PERIPH_GPIOA, 0x0, 0xFF); // Initialize porta + PortInit(GPIO_PORTB_BASE, SYSCTL_PERIPH_GPIOB, 0x0, 0xFF); // Initialize portb + __asm("CPSID I"); // Disable all interrupts + GPIOIntUnregister(GPIO_PORTF_BASE); + GPIOIntRegister(GPIO_PORTF_BASE, Switch_Handler); + GPIOIntEnable(GPIO_PORTF_BASE, GPIO_INT_PIN_0); + GPIOIntTypeSet(GPIO_PORTF_BASE, GPIO_PIN_0, GPIO_RISING_EDGE); + IntEnable(INT_GPIOF_TM4C123); + IntMasterEnable(); + 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 + __asm("CPSIE I"); // Enable all interrupts + while(1) { + __asm("wfi"); // power saving mode + } +} |