//*****************************************************************************
//
// Interrupt handlers
//
//*****************************************************************************
void
SysTickIntHandler(void){
// Handle state changes
if (done){
tick++;
if (tick>1){
if (lose){
// Turn off the noise
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, false);
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
unsigned long ulPeriod = SysCtlClockGet() / 220;
// Set the PWM period to 220 (A) Hz.
PWMGenConfigure(PWM0_BASE, PWM_GEN_0,
PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, ulPeriod);
// Make some noise again
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, true);
PWMGenEnable(PWM0_BASE, PWM_GEN_0);
}
}
if (tick>2){
if (lose){
// Turn off the noise
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, false);
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
unsigned long ulPeriod = SysCtlClockGet() / 440;
// Set the PWM period to 440 (A) Hz. again
PWMGenConfigure(PWM0_BASE, PWM_GEN_0,
PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, ulPeriod);
lose = 0;
}
if (state==1){
startClassic();
tick = 0;
done = 0;
}
else if(state==2){
if(tick>4){
RIT128x96x4Clear();
initMain();
state = 0;
pointer = 0;
tick = 0;
done = 0;
}
}
else if (state==3){
startContinuous();
tick = 0;
done = 0;
}
}
}
}
void
GPIOFIntHandler(void)
{
// Clear the GPIO interrupt.
GPIOPinIntClear(GPIO_PORTF_BASE, GPIO_PIN_1);
y = 0;
// Counter for how long the snooze button was pressed
while (GPIOPinRead(GPIO_PORTF_BASE, GPIO_PIN_1)==0){
y++;
}
// If the snooze button was held long enough, add 5 minutes to the alarm
if (y>500000){
int z;
for (z=0; z<5; z++){
IncrementTimeA();
}
}
// Clear the screen
RIT128x96x4Clear();
// Turn off the LED
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2);
// Turn off the alarm
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, false);
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
// Disable the interrupt so that snooze and turn off alarm cannot be used
GPIOPinIntDisable(GPIO_PORTF_BASE, GPIO_PIN_1);
}
//--------------------------------
void pwm_stepper::Stop(bool bHard) {
if (bHard) {
PWMGenDisable(Base, Generator);
} else {
m_nSteps = ((Default_StartSpeed - m_nSpeed) / m_nDeceleration);
}
}
/*
* ======== PWMTiva_close ========
* @pre Function assumes that the handle is not NULL
*/
void PWMTiva_close(PWM_Handle handle)
{
unsigned int key;
uint8_t pwmPairOutput;
PWMTiva_Object *object = handle->object;
PWMTiva_HWAttrs const *hwAttrs = handle->hwAttrs;
PWMTiva_setDuty(handle, 0);
PWMOutputState(hwAttrs->baseAddr, hwAttrs->pwmOutput, false);
key = Hwi_disable();
pwmPairOutput = (hwAttrs->pwmOutput & 0x01) ? object->pwmOutputBit >> 1 :
object->pwmOutputBit << 1;
/* Disable PWM generator only if the pair output is not being used. */
if (!((object->pwmStatus)->activeOutputs & pwmPairOutput)) {
PWMGenDisable(hwAttrs->baseAddr, hwAttrs->pwmOutput & PWM_GEN_MASK);
*((object->pwmStatus)->genPeriods +
((hwAttrs->pwmOutput / PWM_OUT_0) - 1)) = 0;
}
(object->pwmStatus)->activeOutputs &= ~(object->pwmOutputBit);
if (!(object->pwmStatus)->activeOutputs) {
/* PWM completely off, clear all settings */
(object->pwmStatus)->cyclesPerMicroSec = 0;
(object->pwmStatus)->prescalar = 0;
}
Hwi_restore(key);
Log_print1(Diags_USER1, "PWM: (%p) closed", (UArg) handle);
}
void InitGPIO (void)
{
// GPIO test initialisation
SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0 | SYSCTL_PERIPH_PWM);
SysCtlPWMClockSet(SYSCTL_PWMDIV_1);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); // airspeed output
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); // transponder output
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE); // airspeed response pin
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB); // transponder response pin
// Configure airspeed input
GPIOPinTypeGPIOInput(GPIO_PORTE_BASE, UUT_AIRSPEED_RESPONSE_PIN_PE3);
GPIOIntTypeSet(GPIO_PORTE_BASE, UUT_AIRSPEED_RESPONSE_PIN_PE3, GPIO_RISING_EDGE);
GPIOPortIntRegister(GPIO_PORTE_BASE, &airspeed_response_isr);
// Configure transponder input
GPIOPinTypeGPIOInput(GPIO_PORTB_BASE, UUT_TRANSPONDER_RESPONSE_PIN_PB3);
GPIOIntTypeSet(GPIO_PORTB_BASE, UUT_TRANSPONDER_RESPONSE_PIN_PB3, GPIO_RISING_EDGE);
GPIOPortIntRegister(GPIO_PORTB_BASE, &transponder_response_isr);
// Configure airspeed pulse generation
GPIOPinTypePWM(GPIO_PORTD_BASE, (1<<1)); // Airspeed output TODO: make pin macro
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
PWMIntDisable(PWM0_BASE, PWM_GEN_0);
PWMGenConfigure(PWM0_BASE, PWM_GEN_0, PWM_GEN_MODE_DOWN);
PWMGenIntTrigEnable(PWM0_BASE, PWM_GEN_0, PWM_INT_CNT_LOAD); // configure pwm for end-of-cycle interrupt
PWMGenIntRegister(PWM0_BASE, PWM_GEN_0, airspeed_pulse_isr);
// Configure transponder pulse generation
GPIOPinTypePWM(GPIO_PORTF_BASE, (1<<3)); // Transponder output TODO: make pin macro
PWMGenDisable(PWM0_BASE, PWM_GEN_2);
PWMIntDisable(PWM0_BASE, PWM_GEN_2);
PWMGenConfigure(PWM0_BASE, PWM_GEN_2, PWM_GEN_MODE_DOWN);
PWMGenIntTrigEnable(PWM0_BASE, PWM_GEN_2, PWM_INT_CNT_LOAD); // configure pwm for end-of-cycle interrupt
PWMGenIntRegister(PWM0_BASE, PWM_GEN_2, transponder_pulse_isr);
// Configure UUT reset signal
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
GPIOPinTypeGPIOOutput(GPIO_PORTG_BASE, GPIO_PIN_4);
GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_4, GPIO_PIN_4);
}
// Upon the PWM rising edge, the current system time is measured, a counter is incremented
// and the number of pulses generated to that point is checked.
void transponder_pulse_isr(void)
{
PWMGenIntClear(PWM0_BASE, PWM_GEN_2, PWM_INT_CNT_LOAD);
if(g_transponder_pulse_count >= 0)
g_transponder_times[g_transponder_pulse_count] = stopwatch_get_time_us(&g_transponder_stopwatch); //TODO: consider if the response hasnt occured
g_transponder_pulse_count++;
stopwatch_start(&g_transponder_stopwatch);
if (g_transponder_pulse_count >= g_num_pulses)
PWMGenDisable(PWM0_BASE, PWM_GEN_2);
}
// Save as the first airspeed pulse gen ISR as above, however
// The PWM module is disabled after 3 pulses are generated
void airspeed_pulse_isr_gpio_test_b(void)
{
PWMGenIntClear(PWM0_BASE, PWM_GEN_0, PWM_INT_CNT_LOAD);
if(g_airspeed_pulse_count >= 1)
// Proccess last latency measurement
g_airspeed_times[g_airspeed_pulse_count] = stopwatch_get_time_us(&g_airspeed_stopwatch);
// Increment the pulse count if output is currently enabled and disable output
// if two pulses have been generated
g_airspeed_pulse_count += 1 - test_b_output_toggle();
stopwatch_start(&g_airspeed_stopwatch);
if (g_airspeed_pulse_count >= MAX_NUM_PULSES)
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
}
// Upon the PWM rising edge, the current system time is measured, a counter is incremented
// and the number of pulses generated to that point is checked.
void airspeed_pulse_isr(void)
{
PWMGenIntClear(PWM0_BASE, PWM_GEN_0, PWM_INT_CNT_LOAD);
//GPIOPinWrite(GPIO_PORTC_BASE, (1<<2), (1<<2)); // debug
if(g_airspeed_pulse_count >= 0)
// Proccess last latency measurement
g_airspeed_times[g_airspeed_pulse_count] = stopwatch_get_time_us(&g_airspeed_stopwatch);
g_airspeed_pulse_count++;
stopwatch_start(&g_airspeed_stopwatch);
if (g_airspeed_pulse_count >= g_num_pulses)
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
//GPIOPinWrite(GPIO_PORTC_BASE, (1<<2), ~(1<<2)); // debug
}
//--------------------------------
void pwm_stepper::OnInterrupt() {
m_nSteps--;
if (0 >= m_nSteps) {
m_nSteps = 0;
m_nPhase = Phase_Stop;
}
if (m_bDirectionForward) {
m_nRelativeSteps++;
} else {
m_nRelativeSteps--;
}
switch (m_nPhase) {
case Phase_Accel:
m_nSpeed -= m_nAcceleration;
if (m_nTargetSpeed >= m_nSpeed) {
m_nSpeed = m_nTargetSpeed;
m_nPhase = Phase_Steady;
}
PWMGenPeriodSet(Base, Generator, m_nSpeed);
PWMPulseWidthSet(Base, PWM_OUT_2, 64);
PWMGenEnable(Base, Generator);
break;
case Phase_Steady:
if (m_nSteps <= ((Default_StartSpeed - m_nSpeed) / m_nDeceleration)) {
m_nPhase = Phase_Decel;
}
break;
case Phase_Decel:
m_nSpeed += m_nDeceleration;
if (Default_StartSpeed <= m_nSpeed) {
m_nSpeed = Default_StartSpeed;
m_nPhase = Phase_Stop;
}
PWMGenPeriodSet(Base, Generator, m_nSpeed);
PWMPulseWidthSet(Base, PWM_OUT_2, 64);
PWMGenEnable(Base, Generator);
break;
case Phase_Stop:
PWMGenDisable(Base, Generator);
break;
default:
break;
}
}
void SolarPanel(void *vParameters)
{
static unsigned short motorDrive = 0;
unsigned long period = 125000;
static Bool Flag = FALSE;
static unsigned long dutyCycle = 62500;
static int remainingDeployment = 1000;
while(1)
{
solarPanel * myPanel = (solarPanel*) vParameters;
// DEREREFWEJFIOEAWN DEREFERENCE POINTERS
//IntEnable(INT_GPIOB);
// SysCtlPWMClockSet(SYSCTL_PWMDIV_32);
// if (*(myPanel->solarPanelRetract))
// {
// remainingDeployment = 0;
// }
// else{
// remainingDeployment = 1000;
// 100% motor drive * 10 seconds
//
// char temp[20];
// sprintf(temp,"%u",*(myPanel->solarPanelDeploy));
// RIT128x96x4StringDraw(temp, 40, 80, 15);
// sprintf(temp,"%u",*myPanel->solarPanelRetract);
// RIT128x96x4StringDraw(temp, 60, 80, 15);
// sprintf(temp,"%u",remainingDeployment);
// RIT128x96x4StringDraw(temp, 80, 80, 15);
if(!((*(myPanel -> solarPanelDeploy) && 0 == remainingDeployment) &&
(*(myPanel -> solarPanelRetract) && 1000 == remainingDeployment)))
{
if(*myPanel->solarPanelDeploy || *myPanel->solarPanelRetract)
{
SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOInput(GPIO_PORTF_BASE, GPIO_PIN_0);
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0, 0);
GPIOPinTypePWM(GPIO_PORTF_BASE, GPIO_PIN_0);
GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_0, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD);
PWMGenConfigure(PWM0_BASE, PWM_GEN_0, PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, period);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, dutyCycle);
PWMGenEnable(PWM0_BASE, PWM_GEN_0);
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT, 1);
}
if(*(myPanel -> driveMotorSpeedInc))
{
if((dutyCycle + (0.05 * period)) < period) // ensures duty cycle does not exceed 100%
{
dutyCycle += (period * 0.05); // Increments motor speed by 5%
}
(*(myPanel -> driveMotorSpeedInc)) = FALSE;
}
else if(*(myPanel -> driveMotorSpeedDec))
{
int limit = dutyCycle - (0.05 * period);
if(limit > 0) // ensures duty cycle does not drop below 0%
{
dutyCycle -= (period * 0.05); // Decrements motor speed by 5%
}
(*(myPanel -> driveMotorSpeedDec)) = FALSE;
}
motorDrive = dutyCycle * 100 / period; // (dutyCycle / period) * 100% / 10
// iterations per second
// solar panels are set up such that
// 10 seconds of 100% motorDrive will
// fully retract or detract a solar panel
// from a full ON or OFF state respectively
if(*(myPanel -> solarPanelDeploy))
{
if((remainingDeployment - motorDrive) < 0)
{
remainingDeployment = 0;
}
else
{
remainingDeployment -= motorDrive;
}
}
else if(*(myPanel->solarPanelRetract))
{
if((remainingDeployment + motorDrive) > 1000)
{
remainingDeployment = 1000;
}
else
{
remainingDeployment += motorDrive;
}
}
if(remainingDeployment == 0 && *(myPanel -> solarPanelDeploy))
{
*(myPanel -> solarPanelDeploy) = FALSE;
*(myPanel -> solarPanelState) = TRUE;
g_ulGPIOb=1;
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT, 0);
}
else if(remainingDeployment == 1000)
{
if(*(myPanel -> solarPanelRetract))
{
*(myPanel -> solarPanelRetract) = FALSE;
*(myPanel -> solarPanelState) = FALSE;
g_ulGPIOb=1;
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT, 0);
}
}
}
vTaskDelay(500);
}
}
void ThrusterManage(void *vParameters)
{
unsigned long period = 125000;
static unsigned long dutyCycle = 62500;
thruster * myThruster = (thruster*) vParameters; // creates a pointer to void
// to the myThruster data struct
int duration;
int magnitude;
while(1)
{
duration = *(myThruster -> thrusterCommand) & 0xff00;
magnitude = *(myThruster -> thrusterCommand) & 240;
dutyCycle = magnitude * period / 240;
if(dutyCycle >= 0.99 * period)
{
dutyCycle = 0.99 * period;
}
SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
GPIOPinTypeGPIOInput(GPIO_PORTG_BASE, GPIO_PIN_1);
GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_1, 0);
GPIOPinTypePWM(GPIO_PORTG_BASE, GPIO_PIN_1);
GPIOPadConfigSet(GPIO_PORTG_BASE, GPIO_PIN_1, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD);
PWMGenConfigure(PWM0_BASE, PWM_GEN_0, PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, period);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_1, dutyCycle);
PWMGenEnable(PWM0_BASE, PWM_GEN_0);
PWMOutputState(PWM0_BASE, PWM_OUT_1_BIT, 1);
// RIT128x96x4StringDraw("thrust ", 10, 80, 15);
if(globalCounter % 500 == 0)
{
if ((magnitude != 0) && (duration != 0) && (*(myThruster -> fuelLevel) != 0))
{
if (duration >= 1280)
{
int limit = *(myThruster -> fuelLevel) - (100 / (21600 / magnitude) * 5);
if (limit <= 0) // if fuel level will drop below 0 in the next 5 seconds
{
*(myThruster -> fuelLevel) = 0;
*(myThruster -> thrusterCommand) = 0x0000; // thrusterCommand set to zeros to avoid unncesscary iteration of function
}
else
{
//(*fuelLevel) -= 100 / (37324800 / magnitude) * 5; // document specified fuelLevel decrease rate
*(myThruster -> fuelLevel) -= 100 / (21600 / magnitude) * 5; // fuelLevel decrease rate depends purely on magnitude
// 21600 = (5% * 1800 seconds) / 240 * 100
// fuel lasts for 1800 seconds at 5% (for demo purposes),
// is normalized by (/240) and the percentage magnitude is multiplied by 100
// similar calculations are used to derive the document
// specific fuelLevel consumption
*(myThruster -> thrusterCommand) -= (256 * 5); //subtracts 5 seconds of remaining runtime for major cycle looping
}
}
else
{
int limit = *(myThruster -> fuelLevel) - (100 / (2160 / magnitude) * (duration / 256));
if (limit <= 0) // if the fuel level will drop below 0 in the remaining duration
{
*(myThruster -> fuelLevel) = 0;
*(myThruster -> thrusterCommand) = 0x0000; // thrusterCommand set to zeros to avoid unncesscary iteration of function
}
else
{
//(*fuelLevel) -= 100 / ((37324800 / magnitude) * (duration / 256));
*(myThruster -> fuelLevel) -= 100 / ((2160 / magnitude) * (duration / 256)); // decreases fuelLevel by magnitude and remaining duration
*(myThruster -> thrusterCommand) -= duration; // subtracts the remaining duration from thrusterCommand
}
}
if (*(myThruster -> fuelLevel) <= 10) // sets fuelLow to TRUE when fuel is below or equal to 10
{
*(myThruster -> fuelLow) = TRUE;
}
else // sets fuelLow to FALSE when fuel is greater than 10
{
*(myThruster -> fuelLow) = FALSE;
}
}
else
{
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
PWMOutputState(PWM0_BASE, PWM_OUT_1_BIT, 0);
}
}
vTaskDelay(1000);
}
}
/*
* Warning task function
*/
void warningRunFunction(void *dataptr) {
static alarmState aState = OFF;
static warningState wState = NONE;
static batteryState bState = NORMAL;
static warningState prevState;
prevState = wState;
static int wakeUpAlarmAt = 0;
// Get measurement data
WarningData *data = (WarningData *) dataptr;
float temp = *(data->temperatureCorrected);
float sysPress = *(data->systolicPressCorrected);
float diaPress = *(data->diastolicPressCorrected);
float pulse = *(data->pulseRateCorrected);
int battery = *(data->batteryState);
// Alarm condition
if ( (temp < TEMP_MIN*ALARM_LOW || temp > (TEMP_MAX*ALARM_HIGH)) ||
(sysPress > SYS_MAX*ALARM_HIGH) ||
(diaPress > DIA_MAX*ALARM_HIGH) ||
(pulse < PULSE_MIN*ALARM_LOW || pulse > PULSE_MAX*ALARM_HIGH) ) {
// Should only turn alarm ON if it was previously OFF. If it is
// ASLEEP, shouldn't do anything.
if (aState == OFF) aState = ON;
}
else
aState = OFF;
// Warning Condition
if ( sysPress > SYS_MAX*ALARM_HIGH || diaPress > DIA_MAX*ALARM_HIGH )
wState = WARN_PRESS;
else if ( temp < TEMP_MIN*WARN_LOW || temp > TEMP_MAX*WARN_HIGH )
wState = WARN_TEMP;
else if ( pulse < PULSE_MIN*WARN_LOW || pulse > PULSE_MAX*WARN_HIGH )
wState = WARN_PULSE;
else
wState = NONE;
// Battery Condition
if (battery < BATTERY_MIN)
bState = LOW;
// Handle speaker, based on alarm state
switch (aState) {
case ON:
PWMGenEnable(PWM0_BASE, PWM_GEN_0);
break;
case ASLEEP:
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
break;
default: // OFF
PWMGenDisable(PWM0_BASE, PWM_GEN_0);
break;
}
// Handle warning cases
static int toggletime;
switch (wState) {
case WARN_PRESS:
GPIOPinWrite(GPIO_PORTC_BASE, LED_GREEN, 0X00);
if (wState != prevState) {
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0XFF); // need to flash
toggletime = WARN_RATE_PRESS;
}
else if (0 == minor_cycle_ctr%toggletime) {
if (GPIOPinRead(GPIO_PORTC_BASE, LED_RED) == 0)
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0XFF); // need to flash
else
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0X00); // need to flash
//toggletime+=WARN_RATE_PRESS;
}
break;
case WARN_TEMP:
GPIOPinWrite(GPIO_PORTC_BASE, LED_GREEN, 0X00);
if (wState != prevState) {
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0XFF); // need to flash
toggletime = WARN_RATE_TEMP;
}
else if (0 == minor_cycle_ctr%toggletime) {
if (GPIOPinRead(GPIO_PORTC_BASE, LED_RED) == 0)
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0XFF); // need to flash
else
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0X00); // need to flash
//toggletime+=WARN_RATE_TEMP;
}
break;
case WARN_PULSE:
GPIOPinWrite(GPIO_PORTC_BASE, LED_GREEN, 0X00);
if (wState != prevState) {
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0XFF); // need to flash
toggletime = WARN_RATE_PULSE;
}
else if (0==minor_cycle_ctr%toggletime) {
if (GPIOPinRead(GPIO_PORTC_BASE, LED_RED) == 0)
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0XFF); // need to flash
else
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0X00); // need to flash
//toggletime+=WARN_RATE_PULSE;
}
break;
default: // NORMAL
GPIOPinWrite(GPIO_PORTC_BASE, LED_GREEN, 0xFF);
GPIOPinWrite(GPIO_PORTC_BASE, LED_RED, 0x00);
break;
}
if (bState == LOW) {
GPIOPinWrite(GPIO_PORTC_BASE, LED_YELLOW, 0xFF);
GPIOPinWrite(GPIO_PORTC_BASE, LED_GREEN, 0x00);
}
else
GPIOPinWrite(GPIO_PORTC_BASE, LED_YELLOW, 0x00);
/* This is the alarm override
* Upon override, the alarm is silenced for some time.
* silence length is defined by ALARM_SLEEP_PERIOD
*
* If the button is pushed, the value returned is 0
* If the button is NOT pushed, the value is non-zero
*/
if (0 == GPIOPinRead(GPIO_PORTE_BASE, GPIO_PIN_0) && (aState == ON) )
{
//GPIOPinWrite(GPIO_PORTC_BASE, LED_YELLOW, 0XFF); // for debug, lights led
aState = ASLEEP;
wakeUpAlarmAt = minor_cycle_ctr + ALARM_SLEEP_PERIOD;
}
// Check whether to resound alarm
if (minor_cycle_ctr == wakeUpAlarmAt && aState == ASLEEP) {
aState = ON;
GPIOPinWrite(GPIO_PORTC_BASE, LED_YELLOW, 0X00); // for debug, kills led
}
}