/* Initialize the RTC peripheral */
void Chip_RTC_Init(LPC_RTC_T *pRTC)
{
Chip_Clock_RTCEnable();
/* 2-Second delay after enabling RTC clock */
LPC_ATIMER->DOWNCOUNTER = 2048;
while (LPC_ATIMER->DOWNCOUNTER);
/* Disable RTC */
Chip_RTC_Enable(pRTC, DISABLE);
/* Disable Calibration */
Chip_RTC_CalibCounterCmd(pRTC, DISABLE);
/* Reset RTC Clock */
Chip_RTC_ResetClockTickCounter(pRTC);
/* Clear counter increment and alarm interrupt */
pRTC->ILR = RTC_IRL_RTCCIF | RTC_IRL_RTCALF;
while (pRTC->ILR != 0) {}
/* Clear all register to be default */
pRTC->CIIR = 0x00;
pRTC->AMR = 0xFF;
pRTC->CALIBRATION = 0x00;
}
/* Initialize the RTC peripheral */
void Chip_RTC_Init(LPC_RTC_T *pRTC)
{
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_RTC);
/* Disable RTC */
Chip_RTC_Enable(pRTC, DISABLE);
/* Disable Calibration */
Chip_RTC_CalibCounterCmd(pRTC, DISABLE);
/* Reset RTC Clock */
Chip_RTC_ResetClockTickCounter(pRTC);
/* Clear counter increment and alarm interrupt */
pRTC->ILR = RTC_IRL_RTCCIF | RTC_IRL_RTCALF;
while (pRTC->ILR != 0) {}
/* Clear all register to be default */
pRTC->CIIR = 0x00;
pRTC->AMR = 0xFF;
pRTC->CALIBRATION = 0x00;
}
/**
* Power State handler function
*/
static void PMC_PwrState_Handler(uint8_t buffer, uint8_t Wake_RTC)
{
CHIP_EVRT_SRC_T Evrt_Src;
CHIP_PMC_PWR_STATE_T Pwr_state;
uint8_t confirm = 0xFF;
if (Wake_RTC) {
/* Configure EVRT_SRC_RTC as wake up signal */
Evrt_Src = EVRT_SRC_RTC;
/* Disable interrupt signal from Evrt_Src pin to EVRT */
Chip_EVRT_SetUpIntSrc(Evrt_Src, DISABLE);
/* Initialize and configure RTC */
Chip_RTC_Init(LPC_RTC);
Chip_RTC_ResetClockTickCounter(LPC_RTC);
Chip_RTC_SetTime(LPC_RTC, RTC_TIMETYPE_SECOND, 0);
/* Set alarm time = RTC_ALARM_TIME seconds.
* So after each RTC_ALARM_TIME seconds, RTC will generate and wake-up system
*/
Chip_RTC_SetAlarmTime(LPC_RTC, RTC_TIMETYPE_SECOND, RTC_ALARM_TIME);
Chip_RTC_CntIncrIntConfig(LPC_RTC, RTC_AMR_CIIR_IMSEC, DISABLE);
/* Set the AMR for RTC_ALARM_TIME match alarm interrupt */
Chip_RTC_AlarmIntConfig(LPC_RTC, RTC_AMR_CIIR_IMSEC, ENABLE);
Chip_RTC_ClearIntPending(LPC_RTC, RTC_INT_ALARM);
}
else {
Evrt_Src = EVRT_SRC_WAKEUP0;
}
/* Configure wake up signal */
PMC_Evrt_Configure(Evrt_Src);
/* Get confirmation from user to continue
* Print wake up signal information to user
*/
DEBUGOUT(menu3);
while ( (confirm != 'C') && (confirm != 'c')) {
confirm = DEBUGIN();
}
switch (buffer) {
case '1':
DEBUGOUT("Entering 'Sleep' state ...\r\n");
if (Wake_RTC) {
DEBUGOUT("Wait for %d seconds, RTC alarm will wake up from 'Sleep' mode \r\n", RTC_ALARM_TIME);
Chip_RTC_Enable(LPC_RTC, ENABLE);
}
else {
DEBUGOUT("Press WAKEUP0 button/Connect WAKEUP0 pin to 3.3V to exit 'Sleep' mode \r\n");
}
Chip_PMC_Sleep();
Chip_RTC_DeInit(LPC_RTC);
DEBUGOUT("Woken up \r\n");
break;
case '2':
DEBUGOUT("Entering 'Deep Sleep' state ...\r\n");
if (Wake_RTC) {
DEBUGOUT("Wait for %d seconds, RTC alarm will wake up from 'Deep Sleep' mode \r\n", RTC_ALARM_TIME);
Chip_RTC_Enable(LPC_RTC, ENABLE);
}
else {
DEBUGOUT("Press WAKEUP0 button/Connect WAKEUP0 pin to 3.3V to exit 'Deep Sleep' mode \r\n");
}
Pwr_state = PMC_DeepSleep;
/* Call Pre SleepPowerDown function */
PMC_Pre_SleepPowerDown();
/* Goto Deep Sleep mode */
Chip_PMC_Set_PwrState(Pwr_state);
/* Call Post Wake up Initialisation function */
PMC_Post_Wakeup(buffer);
DEBUGOUT("\r\nWoken up \r\n");
break;
case '3':
DEBUGOUT("Entering 'Power Down' state ...\r\n");
if (Wake_RTC) {
DEBUGOUT("Wait for %d seconds, RTC alarm will wake up from 'Power Down' mode \r\n", RTC_ALARM_TIME);
Chip_RTC_Enable(LPC_RTC, ENABLE);
}
else {
DEBUGOUT("Press WAKEUP0 button/Connect WAKEUP0 pin to 3.3V to exit 'Power Down' mode \r\n");
}
Pwr_state = PMC_PowerDown;
/* Call Pre SleepPowerDown function */
PMC_Pre_SleepPowerDown();
/* Goto Deep Sleep mode */
Chip_PMC_Set_PwrState(Pwr_state);
/* Call Post Wake up Initialisation function */
PMC_Post_Wakeup(buffer);
DEBUGOUT("\r\nWoken up \r\n");
break;
case '4':
DEBUGOUT("Entering 'Deep Power Down' state ...\r\n");
if (Wake_RTC) {
DEBUGOUT("Wait for %d seconds, RTC alarm will wake up from 'Deep Power Down' mode \r\n", RTC_ALARM_TIME);
Chip_RTC_Enable(LPC_RTC, ENABLE);
}
else {
DEBUGOUT("Press WAKEUP0 button/Connect WAKEUP0 pin to 3.3V to exit 'Deep Power Down' mode \r\n");
}
Pwr_state = PMC_DeepPowerDown;
/* Call Pre SleepPowerDown function */
PMC_Pre_SleepPowerDown();
/* Goto Deep Sleep mode */
Chip_PMC_Set_PwrState(Pwr_state);
/* Wake up from Deep power down state is as good as RESET */
while (1) {}
break;
default:
break;
}
}