/**************************************************************************//**
* @brief Setup the CMU
*****************************************************************************/
void setupCMU(void)
{
/* Ensure core frequency has been updated */
SystemCoreClockUpdate();
/* Select clock source for HF clock. */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFRCO);
/* Select clock source for LFA clock. */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFRCO);
/* Disable clock source for LFB clock. */
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_Disabled);
/* Enable HF peripheral clock. */
CMU_ClockEnable(cmuClock_HFPER, true);
/* Enable clock for GPIO. */
CMU_ClockEnable(cmuClock_GPIO, true);
/* Enable clock for LCD. */
CMU_ClockEnable(cmuClock_LCD, true);
/* Enable clock for ACMP0. */
CMU_ClockEnable(cmuClock_ACMP0, true);
/* Enable clock for PRS. */
CMU_ClockEnable(cmuClock_PRS, true);
/* Enable CORELE clock. */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable clock for PCNT. */
CMU_ClockEnable(cmuClock_PCNT0, true);
/* Enable clock on RTC. */
CMU_ClockEnable(cmuClock_RTC, true);
/* Enable clock for LESENSE. */
CMU_ClockEnable(cmuClock_LESENSE, true);
/* Enable clock divider for LESENSE. */
CMU_ClockDivSet(cmuClock_LESENSE, cmuClkDiv_1);
/* Enable clock divider for RTC. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32768);
}
/**************************************************************************//**
* @brief Main function
*****************************************************************************/
int main(void)
{
/* Initialize chip */
CHIP_Init();
setupSWO();
/* Enable HFXO */
CMU_OscillatorEnable(cmuOsc_HFXO, true, true);
/* Switch HFCLK to HFXO */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* Turn off HFRCO */
CMU_OscillatorEnable(cmuOsc_HFRCO, false, false);
BSP_LedsInit();
while (1)
{
/* Blink led three times, with a factor 1 million delay */
blink_led(1000000, 3);
/* Turn on LFRCO */
CMU_OscillatorEnable(cmuOsc_LFRCO, true, true);
/* Select LFRCO */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_LFRCO);
/* Maximum prescaling for smalles frequency (64 Hz) */
CMU_ClockDivSet(cmuClock_CORE, cmuClkDiv_512);
/* Turn off HFXO */
CMU_OscillatorEnable(cmuOsc_HFXO, false, false);
/* Blink led three times, with a factor 1 delay */
blink_led(1, 3);
/* Turn on HFXO */
CMU_OscillatorEnable(cmuOsc_HFXO, true, true);
/* Select HFXO */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* No prescaling for maximum clock frequency (32 MHz) */
CMU_ClockDivSet(cmuClock_CORE, cmuClkDiv_1);
/* Turn off LFRCO */
CMU_OscillatorEnable(cmuOsc_LFRCO, false, 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 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);
}
// This is the timekeeping clock
void setup_rtc()
{
// 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_LFRCO);
// Use the prescaler to reduce power consumption. 2^15
//CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32768);
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_512);
//uint32_t rtcFreq = CMU_ClockFreqGet(cmuClock_RTC);
// Enable clock to RTC module
CMU_ClockEnable(cmuClock_RTC, true);
// Set up the Real Time Clock as long-time timekeeping
RTC_Init_TypeDef init = RTC_INIT_DEFAULT;
init.comp0Top = false;
RTC_Init(&init);
// Enabling Interrupt from RTC
NVIC_EnableIRQ(RTC_IRQn);
}
/*---------------------------------------------------------------------------*/
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 Initializes the UART communication interface.
** \return none.
**
****************************************************************************************/
static void BootComUartInit(void)
{
LEUART_Init_TypeDef init = LEUART_INIT_DEFAULT;
/* configure GPIO pins */
CMU_ClockEnable(cmuClock_GPIO, true);
/* to avoid false start, configure output as high */
GPIO_PinModeSet(gpioPortC, 6, gpioModePushPull, 1);
GPIO_PinModeSet(gpioPortC, 7, gpioModeInput, 0);
/* enable CORE LE clock in order to access LE modules */
CMU_ClockEnable(cmuClock_CORELE, true);
/* select LFXO for LEUARTs (and wait for it to stabilize) */
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
/* do not prescale clock */
CMU_ClockDivSet(cmuClock_LEUART1, cmuClkDiv_1);
/* enable LEUART1 clock */
CMU_ClockEnable(cmuClock_LEUART1, true);
/* configure LEUART */
init.enable = leuartDisable;
LEUART_Init(LEUART1, &init);
LEUART_BaudrateSet(LEUART1, 0, BOOT_COM_UART_BAUDRATE);
/* enable pins at default location */
LEUART1->ROUTE = LEUART_ROUTE_RXPEN | LEUART_ROUTE_TXPEN;
/* clear previous RX interrupts */
LEUART_IntClear(LEUART1, LEUART_IF_RXDATAV);
/* finally enable it */
LEUART_Enable(LEUART1, leuartEnable);
} /*** end of BootUartComInit ***/
/**************************************************************************//**
* @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 Setup the CMU
*****************************************************************************/
void CAPLESENSE_setupCMU(void)
{
/* Ensure core frequency has been updated */
SystemCoreClockUpdate();
/* Select clock source for HF clock. */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFRCO);
/* Select clock source for LFA clock. */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFRCO);
/* Select clock source for LFB clock. */
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_Disabled);
/* Enable HF peripheral clock. */
CMU_ClockEnable(cmuClock_HFPER, 1);
/* Enable clock for GPIO. */
CMU_ClockEnable(cmuClock_GPIO, 1);
/* Enable clock for ACMP0. */
CMU_ClockEnable(cmuClock_ACMP0, 1);
/* Enable clock for ACMP1. */
CMU_ClockEnable(cmuClock_ACMP1, 1);
/* Enable CORELE clock. */
CMU_ClockEnable(cmuClock_CORELE, 1);
/* Enable clock for LESENSE. */
CMU_ClockEnable(cmuClock_LESENSE, 1);
/* Enable clock divider for LESENSE. */
CMU_ClockDivSet(cmuClock_LESENSE, cmuClkDiv_1);
}
/***************************************************************************//**
* @brief
* Enables LFACLK and selects LFXO as clock source for RTC
*
* @param osc
* Oscillator
******************************************************************************/
void RTC_Setup(CMU_Select_TypeDef osc)
{
RTC_Init_TypeDef init;
rtcInitialized = 1;
/* 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, osc);
/* Use a 32 division prescaler to reduce power consumption. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32);
rtcFreq = CMU_ClockFreqGet(cmuClock_RTC);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
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);
}
/***************************************************************************//**
* @brief Enables LFACLK and selects osc as clock source for RTC
******************************************************************************/
void RTC_Setup(CMU_Select_TypeDef osc)
{
RTC_Init_TypeDef init;
/* 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, osc);
/* No division prescaler to increase accuracy. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_1);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = true; /* Count only to top before wrapping */
RTC_Init(&init);
RTC_CompareSet(0, ((LFRCOFREQ * WAKEUP_US) / 1000000));
/* Disable interrupt generation from RTC0, is enabled before each sample-run. */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts in NVIC */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
}
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);
}
}
/**************************************************************************//**
* @brief Start LFRCO for RTC
* Starts the low frequency RC oscillator (LFRCO) and routes it to the RTC
*****************************************************************************/
void startLfxoForRtc(uint8_t freq)
{
/* Starting LFRCO and waiting until it is stable */
CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
/* Routing the LFRCO clock to the RTC */
CMU_ClockSelectSet(cmuClock_LFA,cmuSelect_LFXO);
CMU_ClockEnable(cmuClock_RTC, true);
/* Set Clock prescaler */
if(freq == HWTIMER_FREQ_1MS)
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32);
else
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_1);
/* Enabling clock to the interface of the low energy modules */
CMU_ClockEnable(cmuClock_CORELE, true);
}
/**************************************************************************//**
* @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
* Start LFXO for RTC
*
* @details
* Starts the LFXO and routes it to the RTC. RTC clock is prescaled to save energy.
*
* @note
*********************************************************************/
static void startLfxoForRtc(void)
{
/* Starting LFXO and waiting until it is stable */
CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
/* Routing the LFXO clock to the RTC */
CMU_ClockDivSet(cmuClock_RTC,cmuClkDiv_32768);
CMU_ClockSelectSet(cmuClock_LFA,cmuSelect_LFXO);
CMU_ClockEnable(cmuClock_RTC, true);
}
/**************************************************************************//**
* @brief Start oscillator for RTC
* Starts the low frequency oscillator and routes it to the RTC
*****************************************************************************/
void startOscForRtc(uint8_t freq)
{
/* Start the oscillator, wait until stable, then route it to the RTC */
#ifdef HW_USE_LFXO
CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
CMU_ClockSelectSet(cmuClock_LFA,cmuSelect_LFXO);
#else
CMU_OscillatorEnable(cmuOsc_LFRCO, true, true);
CMU_ClockSelectSet(cmuClock_LFA,cmuSelect_LFRCO);
#endif
CMU_ClockEnable(cmuClock_RTC, true);
/* Set Clock prescaler */
if(freq == HWTIMER_FREQ_1MS)
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32);
else
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_1);
/* Enabling clock to the interface of the low energy modules */
CMU_ClockEnable(cmuClock_CORELE, 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;
/* 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);
}
static void cpu_clock_init(void)
{
SystemLFXOClockSet((uint32_t)EFM32_LFXO_FREQ);
CMU_OscillatorEnable(cmuOsc_LFXO, true, true);
CMU_OscillatorEnable(cmuOsc_HFRCO, true, true);
CMU_HFRCOBandSet(cmuHFRCOBand_28MHz);
// /* HF Core clock is connected to external oscillator */
// CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* HF Core clock is connected to internal RC clock */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFRCO);
/* RTC, LESENSE, LETIMER0, LCD is connected to external 36kHz oscillator */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
/* HFPER clock is divided by 2 - 14MHz */
CMU_ClockDivSet(cmuClock_HFPER, cmuClkDiv_2);
/* core, DMA etc. clock */
CMU_ClockDivSet(cmuClock_CORE, cmuClkDiv_1);
/* enabling clocks */
CMU_ClockEnable(cmuClock_HFPER, true);
CMU_ClockEnable(cmuClock_CORELE, true);
}
/***************************************************************************//**
* @brief
* Initialize board and LCD controller
*
* @details
* This function is called during initialization and when exited from AEM mode
******************************************************************************/
static void _InitController(void) {
/* Initialize EBI banks (Board Controller, external PSRAM, ..) */
BSP_Init(BSP_INIT_DK_EBI);
/* If first word of user data page is non-zero, enable eA Profiler trace */
BSP_TraceProfilerSetup();
/* Configure for 32MHz HFXO operation of core clock */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* on Giant & Leopard we have to reduce core clock when
* talking with slow TFT controller */
CMU_ClockDivSet(cmuClock_CORE, cmuClkDiv_2);
CMU_ClockEnable( cmuClock_GPIO, true);
CMU_ClockEnable( cmuClock_ADC0, true);
LCD_InitializeLCD();
}
static int efm32_uart_setup(struct uart *dev, const struct uart_params *params) {
LEUART_TypeDef *leuart = (void *) dev->base_addr;
LEUART_Init_TypeDef init = LEUART_INIT_DEFAULT;
/* Enable CORE LE clock in order to access LE modules */
CMU_ClockEnable(cmuClock_HFPER, true);
/* Enable CORE LE clock in order to access LE modules */
CMU_ClockEnable(cmuClock_GPIO, true);
/* Enable CORE LE clock in order to access LE modules */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Select LFXO for LEUARTs (and wait for it to stabilize) */
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
CMU_ClockEnable(cmuClock_LEUART0, true);
/* Do not prescale clock */
CMU_ClockDivSet(cmuClock_LEUART0, cmuClkDiv_1);
/* Configure GPIO pin for UART TX */
/* To avoid false start, configure output as high. */
GPIO_PinModeSet( BSP_BCC_TXPORT, BSP_BCC_TXPIN, gpioModePushPull, 1 );
/* Configure GPIO pin for UART RX */
GPIO_PinModeSet( BSP_BCC_RXPORT, BSP_BCC_RXPIN, gpioModeInput, 1 );
/* Configure LEUART */
init.enable = leuartDisable;
init.baudrate = 9600;
LEUART_Init(leuart, &init);
/* Enable the switch that enables UART communication. */
GPIO_PinModeSet( BSP_BCC_ENABLE_PORT, BSP_BCC_ENABLE_PIN, gpioModePushPull, 1 );
BSP_BCC_LEUART->ROUTE |= LEUART_ROUTE_RXPEN | LEUART_ROUTE_TXPEN | BSP_BCC_LOCATION;
/* Finally enable it */
LEUART_Enable(leuart, leuartEnable);
return 0;
}
void system_init(uint8_t* tx_buffer, uint16_t tx_buffer_size, uint8_t* rx_buffer, uint16_t rx_buffer_size)
{
/* Chip errata */
CHIP_Init();
//if (SysTick_Config(CMU_ClockFreqGet(cmuClock_CORE) / 1000)) while (1) ;
// init clock
CMU_ClockDivSet(cmuClock_HF, cmuClkDiv_2); // Set HF clock divider to /2 to keep core frequency < 32MHz
CMU_OscillatorEnable(cmuOsc_HFXO, true, true); // Enable XTAL Osc and wait to stabilize
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO); // Select HF XTAL osc as system clock source. 48MHz XTAL, but we divided the system clock by 2, therefore our HF clock will be 24MHz
led_init();
//button_init();
uart_init();
// TODO not hardware specific
queue_init_with_header(&tx_queue, tx_buffer, tx_buffer_size, 1, 30);
queue_init(&rx_queue, rx_buffer, rx_buffer_size, 1);
}
void __efm32lg_mcu_init()
{
/* Chip errata */
CHIP_Init();
#ifdef HW_USE_HFXO
// init clock with HFXO (external)
CMU_ClockDivSet(cmuClock_HF, cmuClkDiv_2); // 24 MHZ
CMU_OscillatorEnable(cmuOsc_HFXO, true, true); // Enable XTAL Osc and wait to stabilize
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO); // Select HF XTAL osc as system clock source. 48MHz XTAL, but we divided the system clock by 2, therefore our HF clock will be 24MHz
//CMU_ClockDivSet(cmuClock_HFPER, cmuClkDiv_4); // TODO set HFPER clock divider (used for SPI) + disable gate clock when not used?
#else
// init clock with HFRCO (internal)
CMU_HFRCOBandSet(cmuHFRCOBand_21MHz);
CMU_OscillatorEnable(cmuOsc_HFRCO, true, true);
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFRCO);
#endif
uint32_t hf = CMU_ClockFreqGet(cmuClock_HF);
}
/******************************************************************************
* @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 Main function
*****************************************************************************/
int main(void)
{
uint32_t j;
/* Chip errata */
CHIP_Init();
/* Select clock source for HF clock. */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* Prescale the core clock -> HF/4 = 32/4 = 8Mhz */
CMU_ClockDivSet(cmuClock_CORE, cmuClkDiv_4);
/* Configure push button interrupts. */
gpioSetup();
/* configure SWO output for debugging. */
setupSWO();
/* Init Segment LCD without boost. */
SegmentLCD_Init(false);
/* Turn on relevant symbols on the LCD. */
SegmentLCD_Symbol(LCD_SYMBOL_GECKO, true);
/* Print welcome text on the LCD. */
SegmentLCD_Write("HiJack");
/* Init the HiJack interface. */
HIJACK_Init(NULL);
/* While loop sending a range of values upon wakeup. */
while(1){
for(j = 0;j<254;j++){
HIJACK_ByteTx(j);
Delay(10000);
}
}
}
void debug_init ()
{
GPIO_PinModeSet(PORT_SPK, PIN_SPK, gpioModePushPull, 0);
LEUART_Init_TypeDef init = LEUART_INIT_DEFAULT;
CMU_ClockEnable(cmuClock_HFPER, true);
CMU_ClockEnable(cmuClock_GPIO, true);
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
CMU_ClockDivSet(cmuClock_LEUART0, cmuClkDiv_1);
CMU_ClockEnable(cmuClock_LEUART0, true);
init.refFreq = 0; //14MHz / 2 pre-scaled by 4 = 1750000;
init.enable = leuartDisable;
init.baudrate = 9600;
init.databits = leuartDatabits8;
init.parity = leuartNoParity;
init.stopbits = leuartStopbits1;
// Reseting and initializing LEUART0
LEUART_Reset(LEUART0);
LEUART_Init(LEUART0, &init);
GPIO_PinModeSet(PORT_TXD, PIN_TXD, gpioModePushPull, 1);
GPIO_PinModeSet(PORT_RXD, PIN_RXD, gpioModeInput, 0);
LEUART0->ROUTE = LEUART_ROUTE_TXPEN | LEUART_ROUTE_RXPEN | LEUART_ROUTE_LOCATION_LOC0;
LEUART0->CMD = LEUART_CMD_TXDIS | LEUART_CMD_RXDIS | LEUART_CMD_CLEARTX | LEUART_CMD_CLEARRX;
LEUART0->CMD = LEUART_CMD_TXEN | LEUART_CMD_RXEN;
// Eventually enable UART
LEUART_Enable(LEUART0, leuartEnable);
// print banner
debug_str("\r\n============= DEBUG STARTED =============\r\n");
}
/********************************************//**
* \brief configure RTC to run from 32K external crystal
* configure RTC divider to count seconds
* \param
* \param
* \return
*
***********************************************/
void initClock(void)
{
// set RTC to generate interrupts every second time and date will be maintained by software
/* 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);
/* Setting up RTC */
/* Prescaler of 15 = 1 s of resolution and overflow each 194 days */
CMU_ClockDivSet(cmuClock_RTC,cmuClkDiv_32768);
RTC_CompareSet(0, RTC_COUNT_BETWEEN_WAKEUP);
RTC_IntEnable(RTC_IFC_COMP0);
/* Enabling Interrupt from RTC */
NVIC_EnableIRQ(RTC_IRQn);
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
RTC_Init(&rtcInit);
}
void IO_Init(void)
{
I2C_Init_TypeDef i2cInit = I2C_INIT_DEFAULT;
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
USART_InitSync_TypeDef usartInit = USART_INITSYNC_DEFAULT;
RTC_Init_TypeDef rtcInits = RTC_INIT_DEFAULT;
ADC_Init_TypeDef adcInit = ADC_INIT_DEFAULT;
volatile uint32_t test = 0;
/* Enable LE clock and LFXO oscillator */
CMU->HFCORECLKEN0 |= CMU_HFCORECLKEN0_LE;
CMU->OSCENCMD |= CMU_OSCENCMD_LFXOEN;
/* Wait until LFXO ready */
/* Note that this could be done more energy friendly with an interrupt in EM1 */
while (!(CMU->STATUS & CMU_STATUS_LFXORDY)) ;
/* Select LFXO as clock source for LFACLK */
CMU->LFCLKSEL = (CMU->LFCLKSEL & ~_CMU_LFCLKSEL_LFA_MASK) | CMU_LFCLKSEL_LFA_LFXO;
CMU->OSCENCMD = CMU_OSCENCMD_LFRCOEN;
/* Enable GPIO clock */
CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
/* Initialize USART */
CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_UART1;
GPIO->P[4].DOUT |= (1 << 2);
GPIO->P[4].MODEL =
GPIO_P_MODEL_MODE2_PUSHPULL
| GPIO_P_MODEL_MODE3_INPUT;
GPIO->P[1].DOUT |= (1 << 3);
/* Pin PB3 is configured to Push-pull */
GPIO->P[1].MODEL = (GPIO->P[1].MODEL & ~_GPIO_P_MODEL_MODE3_MASK) | GPIO_P_MODEL_MODE3_PUSHPULL;
/* Pin PB4 is configured to Input enabled */
GPIO->P[1].MODEL = (GPIO->P[1].MODEL & ~_GPIO_P_MODEL_MODE4_MASK) | GPIO_P_MODEL_MODE4_INPUT;
/* Pin PB5 is configured to Push-pull */
GPIO->P[1].MODEL = (GPIO->P[1].MODEL & ~_GPIO_P_MODEL_MODE5_MASK) | GPIO_P_MODEL_MODE5_PUSHPULL;
/* To avoid false start, configure output NRF_CSN as high on PB2 */
GPIO->P[1].DOUT |= (1 << 2);
/* Pin PB2 (NRF_CSN) is configured to Push-pull */
GPIO->P[1].MODEL = (GPIO->P[1].MODEL & ~_GPIO_P_MODEL_MODE2_MASK) | GPIO_P_MODEL_MODE2_PUSHPULL;
/* NRF_CE set to initial low */
GPIO->P[1].DOUT &= ~(1 << 1);
GPIO->P[1].MODEL = (GPIO->P[1].MODEL & ~_GPIO_P_MODEL_MODE1_MASK) | GPIO_P_MODEL_MODE1_PUSHPULL;
// NRF_INT
GPIO->P[1].MODEL = (GPIO->P[1].MODEL & ~_GPIO_P_MODEL_MODE0_MASK) | GPIO_P_MODEL_MODE0_INPUT;
// RXEN
GPIO->P[0].DOUT &= ~(1 << 2);
GPIO->P[0].MODEL = (GPIO->P[0].MODEL & ~_GPIO_P_MODEL_MODE2_MASK) | GPIO_P_MODEL_MODE2_PUSHPULL;
// US2_CS (MX25U64)
GPIO->P[1].DOUT |= (1 << 6);
GPIO->P[1].MODEL = (GPIO->P[1].MODEL & ~_GPIO_P_MODEL_MODE6_MASK) | GPIO_P_MODEL_MODE6_PUSHPULL;
// I2C0 SCL
// I2C0 SDA
/* Enable clock for I2C0 */
CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_I2C0;
/* Enable signals SDA, SCL */
I2C0->ROUTE |= I2C_ROUTE_SDAPEN | I2C_ROUTE_SCLPEN | I2C_ROUTE_LOCATION_LOC3;
/* Enable clock for LETIMER0 */
CMU->LFACLKEN0 |= CMU_LFACLKEN0_LETIMER0;
/* Enable clock for RTC */
CMU->LFACLKEN0 |= CMU_LFACLKEN0_RTC;
CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_USART2;
usartInit.msbf = true;
usartInit.clockMode = usartClockMode0;
usartInit.baudrate = 7000000;
USART_InitSync(USART2, &usartInit);
//USART_Enable(USART1, usartEnable);
USART2->ROUTE = (USART2->ROUTE & ~_USART_ROUTE_LOCATION_MASK) | USART_ROUTE_LOCATION_LOC1;
/* Enable signals TX, RX, CLK */
USART2->ROUTE |= USART_ROUTE_TXPEN | USART_ROUTE_RXPEN | USART_ROUTE_CLKPEN;
GPIO_PinModeSet(gpioPortA, 0, gpioModeWiredAnd, 1);
GPIO_PinModeSet(gpioPortA, 1, gpioModeWiredAnd, 1);
GPIO_PinModeSet(gpioPortA, 3, gpioModeWiredAnd, 1);
/* Use location 3: SDA - Pin D14, SCL - Pin D15 */
/* Output value must be set to 1 to not drive lines low... We set */
/* SCL first, to ensure it is high before changing SDA. */
GPIO_PinModeSet(gpioPortD, 15, gpioModeWiredAnd, 1);
GPIO_PinModeSet(gpioPortD, 14, gpioModeWiredAnd, 1);
I2C_Init(I2C0, &i2cInit);
I2C0->CLKDIV=1;
// MMA_INT
GPIO_PinModeSet(gpioPortA, 15, gpioModeInput, 0);
GPIO_IntConfig(gpioPortA, 15, false, true, true);
// NRF_INT
GPIO_IntConfig(gpioPortB, 0, false, true, true);
NVIC_ClearPendingIRQ(GPIO_EVEN_IRQn);
NVIC_EnableIRQ(GPIO_EVEN_IRQn);
NVIC_ClearPendingIRQ(GPIO_ODD_IRQn);
NVIC_EnableIRQ(GPIO_ODD_IRQn);
CMU_ClockEnable(cmuClock_RTC, true);
CMU_ClockEnable(cmuClock_ADC0, true);
/* Each RTC tick is second */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_1);
RTC_Reset();
/* Enable RTC */
//RTC_Enable(true);
rtcInits.comp0Top = false;
RTC_Init(&rtcInits);
// RTC_Init(&rtcInit);
//test = NRF_Status();
//buf[0] = test;
}
/***************************************************************************//**
* @brief
* Initialize RTCDRV driver.
*
* @details
* Will enable all necessary clocks. Initializes internal datastructures
* and configures the underlying hardware timer.
*
* @return
* @ref ECODE_EMDRV_RTCDRV_OK.
******************************************************************************/
Ecode_t RTCDRV_Init( void )
{
if ( rtcdrvIsInitialized == true ) {
return ECODE_EMDRV_RTCDRV_OK;
}
rtcdrvIsInitialized = true;
// Ensure LE modules are clocked.
CMU_ClockEnable( cmuClock_CORELE, true );
#if defined( CMU_LFECLKEN0_RTCC )
// Enable LFECLK in CMU (will also enable oscillator if not enabled).
CMU_ClockSelectSet( cmuClock_LFE, RTCDRV_OSC );
#else
// Enable LFACLK in CMU (will also enable oscillator if not enabled).
CMU_ClockSelectSet( cmuClock_LFA, RTCDRV_OSC );
#endif
#if defined( RTCDRV_USE_RTC )
// Set clock divider.
CMU_ClockDivSet( cmuClock_RTC, RTC_DIVIDER );
// Enable RTC module clock.
CMU_ClockEnable( cmuClock_RTC, true );
// Initialize RTC.
RTC_Init( &initRTC );
#elif defined( RTCDRV_USE_RTCC )
// Set clock divider.
initRTCC.presc = (RTCC_CntPresc_TypeDef)CMU_DivToLog2( RTC_DIVIDER );
// Enable RTCC module clock.
CMU_ClockEnable( cmuClock_RTCC, true );
// Initialize RTCC.
RTCC_Init( &initRTCC );
// Set up Compare channel.
RTCC_ChannelInit( 1, &initRTCCCompareChannel );
#endif
// Disable RTC/RTCC interrupt generation.
RTC_INTDISABLE( RTC_ALL_INTS );
RTC_INTCLEAR( RTC_ALL_INTS );
RTC_COUNTERRESET();
// Clear and then enable RTC interrupts in NVIC.
NVIC_CLEARPENDINGIRQ();
NVIC_ENABLEIRQ();
#if defined( EMDRV_RTCDRV_WALLCLOCK_CONFIG )
// Enable overflow interrupt for wallclock.
RTC_INTENABLE( RTC_OF_INT );
#endif
// Reset RTCDRV internal data structures/variables.
memset( timer, 0, sizeof( timer ) );
inTimerIRQ = false;
rtcRunning = false;
startTimerNestingLevel = 0;
#if defined( EMODE_DYNAMIC )
sleepBlocked = false;
#endif
#if defined( EMDRV_RTCDRV_WALLCLOCK_CONFIG )
wallClockOverflowCnt = 0;
wallClockTimeBase = 0;
#if defined( EMODE_NEVER_ALLOW_EM3EM4 )
// Always block EM3 and EM4 if wallclock is running.
SLEEP_SleepBlockBegin( sleepEM3 );
#endif
#endif
return ECODE_EMDRV_RTCDRV_OK;
}
