/**************************************************************************//**
* @brief LESENSE_IRQHandler
* Interrupt Service Routine for LESENSE Interrupt Line
*****************************************************************************/
void LESENSE_IRQHandler(void)
{
/* Read interrupts flags */
uint32_t intFlags = LESENSE_IntGet();
/* Clear interrupts */
LESENSE_IntClear(LESENSE_IFC_DEC | LESENSE_IFC_DECERR);
/* Enable clock for LCD. */
CMU_ClockEnable(cmuClock_LCD, true);
/* Wait until SYNCBUSY_CTRL flag is cleared. */
LCD_SyncBusyDelay(LCD_SYNCBUSY_CTRL);
/* Enable LCD. */
LCD_Enable(true);
/* If there is a decoder error stop trap execution in this loop */
if (intFlags & LESENSE_IF_DECERR)
{
/* DECODER ERROR */
SegmentLCD_Write(LCSENSE_ERROR_STRING);
while (1) ;
}
/* Write PCNT counter number the LCD */
SegmentLCD_Number(PCNT_CounterGet(PCNT0));
/* Disable RTC first to reset counter */
RTC_Enable(false);
/* Set compare value */
RTC_CompareSet(0, RTC_COMP_VALUE);
/* Enable RTC */
RTC_Enable(true);
}
/***************************************************************************//**
* @brief RTC trigger enable
* @param msec Enable trigger in msec
* @param cb Callback invoked when @p msec elapsed
******************************************************************************/
void RTC_Trigger(uint32_t msec, void (*cb)(void))
{
/* Disable RTC - this will also reset the counter. */
RTC_Enable(false);
/* Auto init upon first use */
if (!rtcInitialized)
{
RTC_Setup();
}
/* Register callback */
rtcCb = cb;
/* Clear interrupt source */
RTC_IntClear(RTC_IF_COMP0);
/* Calculate trigger value in ticks based on 32768Hz clock */
RTC_CompareSet(0, (RTC_FREQ * msec) / 1000);
/* Enable RTC */
RTC_Enable(true);
/* Enable interrupt on COMP0 */
RTC_IntEnable(RTC_IF_COMP0);
}
/***************************************************************************//**
* @brief RTC trigger enable
* @param msec Enable trigger in msec
* @param cb Callback invoked when @p msec elapsed
******************************************************************************/
void RTCDRV_Trigger(uint32_t msec, void (*cb)(void))
{
/* Disable RTC - this will also reset the counter. */
RTC_Enable(false);
/* Auto init if not configured already */
if (!rtcInitialized)
{
/* Default to LFRCO as clock source and prescale by 32. */
RTCDRV_Setup(cmuSelect_LFRCO, cmuClkDiv_32);
}
/* Register callback */
rtcCb = cb;
/* Clear interrupt source */
RTC_IntClear(RTC_IF_COMP0);
/* Calculate trigger value in ticks based on 32768Hz clock */
RTC_CompareSet(0, (rtcFreq * msec) / 1000);
/* Enable RTC */
RTC_Enable(true);
/* Enable interrupt on COMP0 */
RTC_IntEnable(RTC_IF_COMP0);
}
/**************************************************************************//**
* @brief Button Handler
* Shared by GPIO Even and GPIO Odd interrupt handlers
*****************************************************************************/
void button_handler()
{
uint32_t interrupt_source = GPIO_IntGet();
/* Both buttons were pushed - toggle the timer */
if (pb1_is_pushed && pb0_is_pushed)
{
toggleTimer = true;
}
if (toggleTimer)
{
/* Wait for both buttons to be released */
if (!pb1_is_pushed && !pb0_is_pushed)
{
if (enableTimer)
{
SegmentLCD_Write("STOP");
time = old_time;
SegmentLCD_Number(time);
/* Disable RTC */
RTC_Enable(false);
}
else
{
SegmentLCD_Write("START");
old_time = time;
/* Enable RTC */
RTC_Enable(true);
}
enableTimer = !enableTimer;
toggleTimer = false;
return;
}
}
else
{
/* If only Push Button 0 was pressed - decrease the time */
if (!pb0_is_pushed && interrupt_source & 1 << PB0_PIN)
{
if (time > 0)
time--;
SegmentLCD_Number(time);
}
/* If only Push Button 1 was pressed - increase the time */
else if (!pb1_is_pushed && interrupt_source & 1 << PB1_PIN)
{
if (time < 9999)
time++;
SegmentLCD_Number(time);
}
}
}
/**************************************************************************//**
* @brief Delay function, does not depend on interrupts.
*****************************************************************************/
static void Delay( uint32_t msec )
{
/* RTC frequency is LFXO divided by 32 (prescaler) */
#define RTC_FREQ (32768 / 32)
RTC_IntDisable( RTC_IF_COMP0 );
RTC_IntClear( RTC_IF_COMP0 );
RTC_CompareSet( 0, (RTC_FREQ * msec ) / 1000 ); /* Calculate trigger value */
RTC_Enable( true );
while ( !( RTC_IntGet() & RTC_IF_COMP0 ) ); /* Wait for trigger */
RTC_Enable( false );
}
/**
* Initialize RTC Based on Crystal Oscillator
*/
void rtc_crystal_init(void)
{
RTC_Init_TypeDef init;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* Use the prescaler to reduce power consumption. */
CMU_ClockDivSet(cmuClock_RTC, RTC_PRESCALE);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false; /* Start disabled to reset counter */
init.debugRun = false;
init.comp0Top = false; /* Count to max before wrapping */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
/* Start RTC counter */
RTC_Enable(true);
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_init(void)
{
RTC_Init_TypeDef init = RTC_INIT_DEFAULT;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* Don't use prescaler to have highest precision */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_1);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false; /* Start disabled to reset counter */
init.debugRun = false;
init.comp0Top = false; /* Don't Reset Count on comp0 */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
/* Start RTC counter */
RTC_Enable(true);
}
void rtcSetup(){
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
/* Enabling clock to LE configuration register */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Selecting crystal oscillator to drive LF clock */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* 32 clock division to save energy */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32768);
/* Providing clock to RTC */
CMU_ClockEnable(cmuClock_RTC, true);
/* Initialize RTC */
rtcInit.enable = false; /* Do not start RTC after initialization is complete. */
rtcInit.debugRun = false; /* Halt RTC when debugging. */
rtcInit.comp0Top = true; /* Wrap around on COMP0 match. */
RTC_Init(&rtcInit);
/* Interrupt every minute */
RTC_CompareSet(0, ((RTC_FREQ / CLOCK_DIVISION) * 10 ) - 1 );
/* Enable interrupt */
NVIC_EnableIRQ(RTC_IRQn);
RTC_IntEnable(RTC_IEN_COMP0);
/* Start Counter */
RTC_Enable(true);
}
/***************************************************************************//**
* @brief
* Deinitialize RTCDRV driver.
*
* @details
* Will disable interrupts and turn off the clock to the underlying hardware
* timer.
* If integration with SLEEP module is enabled it will remove any
* restriction that are set on energy mode usage.
*
* @return
* @ref ECODE_EMDRV_RTCDRV_OK.
******************************************************************************/
Ecode_t RTCDRV_DeInit( void )
{
// Disable and clear all interrupt sources.
NVIC_DISABLEIRQ();
RTC_INTDISABLE( RTC_ALL_INTS );
RTC_INTCLEAR( RTC_ALL_INTS );
NVIC_CLEARPENDINGIRQ();
// Disable RTC module and its clock.
#if defined( RTCDRV_USE_RTC )
RTC_Enable( false );
CMU_ClockEnable( cmuClock_RTC, false );
#elif defined( RTCDRV_USE_RTCC )
RTCC_Enable( false );
CMU_ClockEnable( cmuClock_RTCC, false );
#endif
#if defined( EMODE_NEVER_ALLOW_EM3EM4 )
// End EM3 and EM4 blocking.
SLEEP_SleepBlockEnd( sleepEM3 );
#endif
#if defined( EMODE_DYNAMIC )
// End EM3 and EM4 blocking if a block start has been set.
if ( sleepBlocked ) {
SLEEP_SleepBlockEnd( sleepEM3 );
}
#endif
// Mark the driver as uninitialized.
rtcdrvIsInitialized = false;
return ECODE_EMDRV_RTCDRV_OK;
}
/**************************************************************************//**
* @brief Enables LFACLK and selects LFXO as clock source for RTC
* Sets up the RTC to generate an interrupt every minute.
*****************************************************************************/
void rtcSetup(void)
{
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
/* Enable LE domain registers */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable LFXO as LFACLK in CMU. This will also start LFXO */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* Set a clock divisor of 32 to reduce power conumption. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32);
/* Enable RTC clock */
CMU_ClockEnable(cmuClock_RTC, true);
/* Initialize RTC */
rtcInit.enable = false; /* Do not start RTC after initialization is complete. */
rtcInit.debugRun = false; /* Halt RTC when debugging. */
rtcInit.comp0Top = true; /* Wrap around on COMP0 match. */
RTC_Init(&rtcInit);
/* Interrupt every minute */
RTC_CompareSet(0, ((RTC_FREQ / 32) * 60 ) - 1 );
/* Enable interrupt */
NVIC_EnableIRQ(RTC_IRQn);
RTC_IntEnable(RTC_IEN_COMP0);
/* Start Counter */
RTC_Enable(true);
}
/**************************************************************************//**
* @brief Enables LFACLK and selects LFXO as clock source for RTC
* Sets up the RTC to generate an interrupt every second.
*****************************************************************************/
static void rtcSetup(unsigned int frequency)
{
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
palClockSetup(cmuClock_LFA);
/* Set the prescaler. */
CMU_ClockDivSet( cmuClock_RTC, cmuClkDiv_2 );
/* Enable RTC clock */
CMU_ClockEnable(cmuClock_RTC, true);
/* Initialize RTC */
rtcInit.enable = false; /* Do not start RTC after initialization is complete. */
rtcInit.debugRun = false; /* Halt RTC when debugging. */
rtcInit.comp0Top = true; /* Wrap around on COMP0 match. */
RTC_Init(&rtcInit);
/* Interrupt at given frequency. */
RTC_CompareSet(0, ((CMU_ClockFreqGet(cmuClock_RTC) / frequency) - 1) & _RTC_COMP0_MASK );
#ifndef INCLUDE_PAL_GPIO_PIN_AUTO_TOGGLE_HW_ONLY
/* Enable interrupt */
NVIC_EnableIRQ(RTC_IRQn);
RTC_IntEnable(RTC_IEN_COMP0);
#endif
RTC_CounterReset();
/* Start Counter */
RTC_Enable(true);
}
/**************************************************************************//**
* @brief RTC_IRQHandler
* Interrupt Service Routine for RTC which is used as system tick counter in EM2
*****************************************************************************/
void RTC_IRQHandler(void)
{
/* If using preemption, also force a context switch. */
#if (configUSE_PREEMPTION == 1)
port_NVIC_INT_CTRL_REG = port_NVIC_PENDSVSET_BIT;
#endif /* (configUSE_PREEMPTION == 1) */
/* Set RTC interrupt to one system tick period*/
RTC_Enable(false);
RTC_CompareSet(0, ulTimerReloadValueForOneTick);
/* Restart the counter */
#if (configUSE_TICKLESS_IDLE == 1)
/* Set flag that interrupt was made*/
intTickFlag = true;
#endif /* (configUSE_TICKLESS_IDLE == 1) */
/* Critical section which protect incrementing the tick*/
( void ) portSET_INTERRUPT_MASK_FROM_ISR();
{
xTaskIncrementTick();
}
portCLEAR_INTERRUPT_MASK_FROM_ISR(0);
/* Clear interrupt */
RTC_IntClear(_RTC_IFC_MASK);
RTC_CounterReset();
}
void rtt_init(void)
{
/* prescaler of 32768 = 1 s of resolution and overflow each 194 days */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32768);
/* enable clocks */
CMU_ClockEnable(cmuClock_CORELE, true);
CMU_ClockEnable(cmuClock_RTC, true);
/* reset and initialize peripheral */
EFM32_CREATE_INIT(init, RTC_Init_TypeDef, RTC_INIT_DEFAULT,
.conf.enable = false,
.conf.comp0Top = false
);
RTC_Reset();
RTC_Init(&init.conf);
/* enable interrupts */
RTC_IntEnable(RTC_IEN_OF);
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
/* enable peripheral */
RTC_Enable(true);
}
void os_idle_demon(void)
{
RTC_Init_TypeDef init;
unsigned int sleep;
/* The idle demon is a system thread, running when no other thread is */
/* ready to run. */
/* Enable system clock for RTC */
/* LFXO setup */
/* Use 70% boost */
CMU->CTRL = (CMU->CTRL & ~_CMU_CTRL_LFXOBOOST_MASK) | CMU_CTRL_LFXOBOOST_70PCENT;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* Use a 32 division prescaler to reduce power consumption. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = false; /* Count to max value before wrapping */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
for (;;)
{
/* os_suspend stops scheduler and returns time to next event in OS_TICK units */
sleep = os_suspend();
if (sleep)
{
RTC_CompareSet(0, sleep - 1);
RTC_IntClear(RTC_IFC_COMP0);
RTC_IntEnable(RTC_IF_COMP0);
RTC_CounterReset();
/* Enter EM2 low power mode - could be replaced with EM1 if required */
EMU_EnterEM2(true);
/* get information how long we were in sleep */
sleep = RTC_CounterGet();
RTC_Enable(false);
};
/* resume scheduler providing information how long MCU was sleeping */
os_resume(sleep);
}
}
/*************************************************************************
* Function Name: RTC_Init
* Parameters: void
*
* Return: 0: sucess
* 1: fail
*
* Description: Initialize RTC, configure prescaler, CIIR and AMR register
*
*************************************************************************/
int rtc_init(unsigned char BackComp)
{
LPC_Rtc_DateTime_t datetime;
LPC_Rtc_Date_t date;
/* check if RTC is enabled already -> battery buffered */
if (RTC_CCR & CCR_CLKEN)
{
/* make sure it is set to external watch quartz, no matter if enabled or not */
RTC_CCR |= CCR_CLKSRC;
/* get current date from RTC */
RTC_GetDate(&date);
}
else
{
/* disable and reset RTC */
RTC_CCR = CCR_CTCRST;
RTC_CCR = 0x00;
RTC_CCR |= CCR_CLKSRC; /* 32kHz watch quarz */
/* init all necessary RTC registers */
RTC_ILR = ILR_COUNT_INC_FLAG | ILR_ALARM_FLAG | ILR_SUB_SEC_FLAG; /* clear all interrupt flags of RTC */
RTC_CIIR = CIIR_SEC; /* enable second interrupt */
RTC_AMR = AMR_SEC; /* mask second interrupts */
RTC_CISS = CISS_DISABLE; /* no sub second interrupts */
/* set default time */
memcpy((unsigned char *)&datetime, (unsigned char *)&RTC_InitDateTime, sizeof(LPC_Rtc_DateTime_t));
/* initialize Date and Time */
RTC_SetDateTime(&datetime);
}
/* check if the date is valid, set default if not */
if(!IsValidDay(date.year, date.month, date.day))
{
memcpy((char *)&datetime, (char *)&RTC_InitDateTime, sizeof(LPC_Rtc_DateTime_t));
/* initialize Date and Time */
if (RTC_SetDateTime(&datetime))
return 1;
}
/* convert current time to unix time */
RTC_datetime_to_unix(&unix_time, &datetime);
/* set interrupt vector entry for RTC 1s interrupt */
set_isr_handler( RTC_IRQ,(void *)RTC_ISR,RTC_IRQ_PRIO);
#ifndef LPC1768
/* Enable the interrupts */
VICIntEnable |= (1<<13);
#endif
RTC_Enable();
return 0;
}
/**************************************************************************//**
* @brief vPortSetupTimerInterrupt
* Override the default definition of vPortSetupTimerInterrupt() that is weakly
* defined in the FreeRTOS Cortex-M3, which set source of system tick interrupt
*****************************************************************************/
void vPortSetupTimerInterrupt(void)
{
/* Set our data about timer used as system ticks*/
ulTimerReloadValueForOneTick = SYSTICK_LOAD_VALUE ;
#if (configUSE_TICKLESS_IDLE == 1)
xMaximumPossibleSuppressedTicks = TIMER_CAPACITY / (SYSTICK_LOAD_VALUE);
ulStoppedTimerCompensation = TIMER_COMPENSATION / (configCPU_CLOCK_HZ / configSYSTICK_CLOCK_HZ);
#endif /* (configUSE_TICKLESS_IDLE == 1) */
/* Configure RTC as system tick source */
/* Structure of RTC init */
RTC_Init_TypeDef init;
#if (configCRYSTAL_IN_EM2 == 1)
/* LFXO setup */
/* For cut D, use 70% boost */
CMU->CTRL = (CMU->CTRL & ~_CMU_CTRL_LFXOBOOST_MASK) | CMU_CTRL_LFXOBOOST_70PCENT;
#if defined( EMU_AUXCTRL_REDLFXOBOOST )
EMU->AUXCTRL = (EMU->AUXCTRL & ~_EMU_AUXCTRL_REDLFXOBOOST_MASK) | EMU_AUXCTRL_REDLFXOBOOST;
#endif
#else
/* RC oscillator */
CMU_OscillatorEnable(cmuOsc_LFRCO, true, true);
#endif
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
#if (configCRYSTAL_IN_EM2 == 1)
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
#else
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFRCO);
#endif
/* Set 2 times divider to reduce energy*/
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_2);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = false; /* Count to max value before wrapping */
/* Initialization of RTC */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(RTC_IFC_COMP0);
/* Tick interrupt MUST execute at the lowest interrupt priority. */
NVIC_SetPriority(RTC_IRQn, 255);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
RTC_CompareSet(0, SYSTICK_LOAD_VALUE);
RTC_IntClear(RTC_IFC_COMP0);
RTC_IntEnable(RTC_IF_COMP0);
RTC_Enable(true);
//RTC_CounterReset();
}
/**************************************************************************//**
* @brief Initialize Real Time Counter
*****************************************************************************/
void initRTC()
{
/* Starting LFXO and waiting until it is stable */
CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
/* Routing the LFXO clock to the RTC */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
CMU_ClockEnable(cmuClock_RTC, true);
/* Enabling clock to the interface of the low energy modules */
CMU_ClockEnable(cmuClock_CORELE, true);
const RTC_Init_TypeDef rtcInit =
{
.enable = true,
.debugRun = false,
.comp0Top = true,
};
RTC_Init(&rtcInit);
/* Set comapre value for compare register 0 */
RTC_CompareSet(0, RTC_COUNT_BETWEEN_WAKEUP);
/* Enable interrupt for compare register 0 */
RTC_IntEnable(RTC_IFC_COMP0);
/* Enabling Interrupt from RTC */
NVIC_EnableIRQ(RTC_IRQn);
RTC_Enable(false);
}
/**************************************************************************//**
* @brief Initialize General Purpuse Input/Output
*****************************************************************************/
void initGPIO()
{
/* Enable clock for GPIO module */
CMU_ClockEnable(cmuClock_GPIO, true);
/* Configure pin PB9/PD8 (Push Button 1) and PB10/PB11 (Push Button 2) as an input,
* so that we can read their values. */
GPIO_PinModeSet(PB0_PORT, PB0_PIN, gpioModeInput, 1);
GPIO_PinModeSet(PB1_PORT, PB1_PIN, gpioModeInput, 1);
/* Enable GPIO_ODD and GPIO_EVEN interrupts in NVIC */
NVIC_EnableIRQ(GPIO_ODD_IRQn);
NVIC_EnableIRQ(GPIO_EVEN_IRQn);
/* Configure interrupts on falling edge for pins B9/D8 (Push Button 1),
* B10/B11 (Push Button 2) and D3 */
GPIO_IntConfig(PB0_PORT, PB0_PIN, true, true, true);
GPIO_IntConfig(PB1_PORT, PB1_PIN, true, true, true);
}
/**************************************************************************//**
* @brief A separate function for taking all the samples is preferred since
* the whole idea is to stay in EM2 between samples. If other code is added,
* it might be more energy efficient to configure the ADC to use DMA while
* the cpu can other work.
*****************************************************************************/
void startAdcSampling(void)
{
sampleCount = 0;
adcFinished = false;
/* Enable RTC, it can be enabled all the time as well if needed. */
RTC_Enable(true);
/* Enable interrupt on COMP0 */
RTC_IntEnable(RTC_IF_COMP0);
}
/**************************************************************************//**
* @brief Enables LFACLK and selects LFXO as clock source for RTC
* Sets up the RTC to generate an interrupt every second.
*****************************************************************************/
static void rtcSetup(unsigned int frequency)
{
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
/* Enable LE domain registers */
if ( !( CMU->HFCORECLKEN0 & CMU_HFCORECLKEN0_LE) )
{
CMU_ClockEnable(cmuClock_CORELE, true);
}
#ifdef PAL_RTC_CLOCK_LFXO
/* LFA with LFXO setup is relatively time consuming. Therefore, check if it
already enabled before calling. */
if ( !(CMU->STATUS & CMU_STATUS_LFXOENS) )
{
CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
}
if ( cmuSelect_LFXO != CMU_ClockSelectGet(cmuClock_LFA) )
{
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
}
#elif defined PAL_RTC_CLOCK_LFRCO
/* Enable LFACLK in CMU (will also enable LFRCO oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFRCO);
#elif defined PAL_RTC_CLOCK_ULFRCO
/* Enable LFACLK in CMU (will also enable ULFRCO oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_ULFRCO);
#else
#error No clock source for RTC defined.
#endif
/* Set the prescaler. */
CMU_ClockDivSet( cmuClock_RTC, cmuClkDiv_1 );
/* Enable RTC clock */
CMU_ClockEnable(cmuClock_RTC, true);
/* Initialize RTC */
rtcInit.enable = false; /* Do not start RTC after initialization is complete. */
rtcInit.debugRun = false; /* Halt RTC when debugging. */
rtcInit.comp0Top = true; /* Wrap around on COMP0 match. */
RTC_Init(&rtcInit);
/* Interrupt at given frequency. */
RTC_CompareSet(0, (CMU_ClockFreqGet(cmuClock_RTC) / frequency) - 1 );
/* Enable interrupt */
NVIC_EnableIRQ(RTC_IRQn);
RTC_IntEnable(RTC_IEN_COMP0);
/* Start Counter */
RTC_Enable(true);
}
/**************************************************************************//**
* @brief PCNT0_IRQHandler
* Interrupt Service Routine for PCNT0 Interrupt Line
*****************************************************************************/
void PCNT0_IRQHandler(void)
{
PCNT_IntGet(PCNT0);
PCNT_IntClear(PCNT0, PCNT_IEN_DIRCNG);
/* Enable clock for LCD. */
CMU_ClockEnable(cmuClock_LCD, true);
/* Wait until SYNCBUSY_CTRL flag is cleared. */
LCD_SyncBusyDelay(LCD_SYNCBUSY_CTRL);
/* Enable LCD. */
LCD_Enable(true);
/* Write PCNT counter number the LCD */
SegmentLCD_Write(PCNT_DIRCHANGE_STRING);
/* Disable RTC first to reset counter */
RTC_Enable(false);
/* Set compare value */
RTC_CompareSet(0, RTC_COMP_VALUE);
/* Enable RTC */
RTC_Enable(true);
}
/******************************************************************//**
* @brief
* Configure RTC device
*
* @details
*
* @note
*
* @param[in] dev
* Pointer to device descriptor
*
* @param[in] cmd
* RTC control command
*
* @param[in] args
* Arguments
*
* @return
* Error code
*********************************************************************/
static rt_err_t rt_rtc_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
RT_ASSERT(dev != RT_NULL);
switch (cmd)
{
case RT_DEVICE_CTRL_RTC_GET_TIME:
*(rt_uint32_t *)args = rtc_time + RTC_CounterGet();
break;
case RT_DEVICE_CTRL_RTC_SET_TIME:
{
rtc_time = *(rt_uint32_t *)args;
/* Reset counter */
RTC_Enable(false);
RTC_Enable(true);
}
break;
}
return RT_EOK;
}
/**************************************************************************//**
* @brief RTC_IRQHandler
* Interrupt Service Routine for RTC Interrupt Line
*****************************************************************************/
void RTC_IRQHandler(void)
{
/* Clear interrupt flag */
RTC_IntClear(RTC_IFS_COMP0);
/* Disable RTC */
RTC_Enable(false);
/* Turn off all segments */
SegmentLCD_AllOff();
/* Disable LCD to avoid excessive current consumption */
LCD_Enable(false);
/* Wait until SYNCBUSY_CTRL flag is cleared. */
LCD_SyncBusyDelay(LCD_SYNCBUSY_CTRL);
/* Disable clock for LCD. */
CMU_ClockEnable(cmuClock_LCD, false);
}
/******************************************************************************
* @brief
* Stops RTC. Turns off clocks and interrupts
*****************************************************************************/
void stopRTCTick(void)
{
RTC_Enable(false);
RTC->CNT = 0;
/* Turn off clock for RTC */
CMU_ClockEnable(cmuClock_RTC, false);
/* Disable clock to LF peripherals */
CMU_ClockEnable(cmuClock_CORELE, false);
/* Disable RTC interrupts */
NVIC_DisableIRQ(RTC_IRQn);
RTC_IntDisable(RTC_IF_COMP0);
}
/***************************************************************************//**
* @brief RTC Interrupt Handler, invoke callback if defined.
* The interrupt table is in assembly startup file startup_efm32.s
******************************************************************************/
void RTC_IRQHandler(void)
{
/* Disable RTC */
RTC_Enable(false);
/* Clear interrupt source */
RTC_IntClear(RTC_IF_COMP0);
/* Disable interrupt */
RTC_IntDisable(RTC_IF_COMP0);
/* Trigger callback if defined */
if (rtcCb)
{
rtcCb();
}
}
/**************************************************************************//**
* @brief Real Time Counter Interrupt Handler
*****************************************************************************/
void RTC_IRQHandler(void)
{
/* Clear interrupt source */
RTC_IntClear(RTC_IFC_COMP0);
time--;
SegmentLCD_Number(time);
if (time == 0)
{
SegmentLCD_Write("DONE");
time = old_time;
/* Disable RTC */
RTC_Enable(false);
enableTimer = false;
}
SegmentLCD_Number(time);
}
void initClocks()
{
/* Starting LFXO and waiting until it is stable */
CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
// starting HFXO, wait till stable
CMU_OscillatorEnable(cmuOsc_HFXO, true, true);
// route HFXO to CPU
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* Routing the LFXO clock to the RTC */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
// disabling the RCs
CMU_ClockEnable(cmuSelect_HFRCO, false);
CMU_ClockEnable(cmuSelect_LFRCO, false);
/* Enabling clock to the interface of the low energy modules */
CMU_ClockEnable(cmuClock_CORE, true);
CMU_ClockEnable(cmuClock_CORELE, true);
// enable clock to hf perfs
CMU_ClockEnable(cmuClock_HFPER, true);
// enable clock to GPIO
CMU_ClockEnable(cmuClock_GPIO, true);
// enable clock to RTC
CMU_ClockEnable(cmuClock_RTC, true);
RTC_Enable(true);
// enable radio usart
CMU_ClockEnable(cmuClock_USART0, true);
// enable timers
CMU_ClockEnable(cmuClock_TIMER0, true);
CMU_ClockEnable(cmuClock_TIMER1, true);
}
/***************************************************************************//**
* @brief RTC Interrupt Handler.
******************************************************************************/
void RTC_IRQHandler(void)
{
/* Start ADC conversion as soon as we wake up. */
ADC_Start(ADC0, adcStartSingle);
/* Clear the interrupt flag */
RTC_IntClear(RTC_IF_COMP0);
/* Wait while conversion is active */
while (ADC0->STATUS & ADC_STATUS_SINGLEACT);
/* Get ADC result */
sampleBuffer[sampleCount++] = ADC_DataSingleGet(ADC0);
if(sampleCount >= N_SAMPLES){
adcFinished = 1;
RTC_Enable(false);
RTC_IntDisable(_RTC_IF_MASK);
}
}
/******************************************************************************
* @brief Configure RTC
*
*****************************************************************************/
void rtcSetup(void)
{
RTC_Init_TypeDef rtcInit;
/* Select LFXO as clock source for the RTC */
CMU_ClockSelectSet(cmuClock_LFA,cmuSelect_LFXO);
CMU_ClockEnable(cmuClock_RTC, true);
/* Set RTC pre-scaler */
CMU_ClockDivSet(cmuClock_RTC,cmuClkDiv_1);
/* Enable clock to low energy modules */
CMU_ClockEnable(cmuClock_CORELE, true);
/* RTC configuration struct */
rtcInit.debugRun = false;
rtcInit.comp0Top = false;
rtcInit.enable = false;
/* Initialize RTC */
RTC_Init(&rtcInit);
/* Set RTC compare value for first display update */
RTC_CompareSet(0, RTC_COUNTS_BETWEEN_DISPLAY );
/* Set RTC compare value for first temperature compensation */
RTC_CompareSet(1, RTC_COUNTS_BETWEEN_TC );
/* Enable COMP0 interrupt to trigger display update, */
/* COMP1 interrupt to trigger temperature compensation, and */
/* OF interrupt to keep track of counter overflows */
RTC_IntEnable(RTC_IEN_COMP0 | RTC_IEN_COMP1 | RTC_IEN_OF );
/* Enable RTC interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
/* Enable RTC */
RTC_Enable(true);
}
/**************************************************************************//**
* @brief Enables LFACLK and selects LFXO as clock source for RTC.
* Sets up the RTC to count at 1024 Hz.
* The counter should not be cleared on a compare match and keep running.
* Interrupts should be cleared and enabled.
* The counter should run.
*****************************************************************************/
error_t hw_timer_init(hwtimer_id_t timer_id, uint8_t frequency, timer_callback_t compare_callback, timer_callback_t overflow_callback)
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(timer_inited)
return EALREADY;
if(frequency != HWTIMER_FREQ_1MS && frequency != HWTIMER_FREQ_32K)
return EINVAL;
start_atomic();
compare_f = compare_callback;
overflow_f = overflow_callback;
timer_inited = true;
/* Configuring clocks in the Clock Management Unit (CMU) */
startLfxoForRtc(frequency);
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
rtcInit.enable = false; /* Don't enable RTC after init has run */
rtcInit.comp0Top = true; /* Clear counter on compare 0 match: cmp 0 is used to limit the value of the rtc to 0xffff */
rtcInit.debugRun = false; /* Counter shall not keep running during debug halt. */
/* Initialize the RTC */
RTC_Init(&rtcInit);
//disable all rtc interrupts while we're still configuring
RTC_IntDisable(RTC_IEN_OF | RTC_IEN_COMP0 | RTC_IEN_COMP1);
RTC_IntClear(RTC_IFC_OF | RTC_IFC_COMP0 | RTC_IFC_COMP1);
//Set maximum value for the RTC
RTC_CompareSet( 0, 0x0000FFFF );
RTC_CounterReset();
RTC_IntEnable(RTC_IEN_COMP0);
NVIC_EnableIRQ(RTC_IRQn);
RTC_Enable(true);
end_atomic();
return SUCCESS;
}
void rtcSetDelay(int menuItem){
int delay;
switch (menuItem)
{
case 0:
delay = 10;
break;
case 1:
delay = 3600 * 12;
break;
case 2:
delay = 3600 * 24;
break;
case 3:
delay = 3600 * 48;
break;
}
/* Interrupt every minute */
RTC_CompareSet(0, ((RTC_FREQ / CLOCK_DIVISION) * delay ) - 1 );
/* Start Counter */
RTC_Enable(true);
}