@ -31,6 +31,7 @@
# include "py/runtime.h"
# include "rtc.h"
# include "irq.h"
# include "mphalport.h"
/// \moduleref pyb
/// \class RTC - real time clock
@ -52,112 +53,18 @@ static mp_uint_t rtc_info;
// Note: LSI is around (32KHz), these dividers should work either way
// ck_spre(1Hz) = RTCCLK(LSE) /(uwAsynchPrediv + 1)*(uwSynchPrediv + 1)
// modify RTC_ASYNCH_PREDIV & RTC_SYNCH_PREDIV in board/<BN>/mpconfigport.h to change sub-second ticks
// default is 3906.25 µs, min is ~30.52 µs (will increas Ivbat by ~500nA)
# ifndef RTC_ASYNCH_PREDIV
# define RTC_ASYNCH_PREDIV (0x7f)
# endif
# ifndef RTC_SYNCH_PREDIV
# define RTC_SYNCH_PREDIV (0x00ff)
#if 0
# define RTC_INFO_USE_EXISTING (0)
# define RTC_INFO_USE_LSE (1)
# define RTC_INFO_USE_LSI (3)
void rtc_init ( void ) {
// Enable the PWR clock
RCC_APB1PeriphClockCmd ( RCC_APB1Periph_PWR , ENABLE ) ;
// Allow access to RTC
PWR_BackupAccessCmd ( ENABLE ) ;
if ( RTC_ReadBackupRegister ( RTC_BKP_DR0 ) = = 0x32F2 ) {
// RTC still alive, so don't re-init it
// wait for RTC APB register synchronisation
RTC_WaitForSynchro ( ) ;
rtc_info = RTC_INFO_USE_EXISTING ;
return ;
}
uint32_t timeout = 10000000 ;
// Enable the PWR clock
RCC_APB1PeriphClockCmd ( RCC_APB1Periph_PWR , ENABLE ) ;
// Allow access to RTC
PWR_BackupAccessCmd ( ENABLE ) ;
// Enable the LSE OSC
RCC_LSEConfig ( RCC_LSE_ON ) ;
// Wait till LSE is ready
mp_uint_t sys_tick = sys_tick_counter ;
while ( ( RCC_GetFlagStatus ( RCC_FLAG_LSERDY ) = = RESET ) & & ( - - timeout > 0 ) ) {
}
// record how long it took for the RTC to start up
rtc_info = ( sys_tick_counter - sys_tick ) < < 2 ;
// If LSE timed out, use LSI instead
if ( timeout = = 0 ) {
// Disable the LSE OSC
RCC_LSEConfig ( RCC_LSE_OFF ) ;
// Enable the LSI OSC
RCC_LSICmd ( ENABLE ) ;
// Wait till LSI is ready
while ( RCC_GetFlagStatus ( RCC_FLAG_LSIRDY ) = = RESET ) {
}
// Use LSI as the RTC Clock Source
RCC_RTCCLKConfig ( RCC_RTCCLKSource_LSI ) ;
// record that we are using the LSI
rtc_info | = RTC_INFO_USE_LSI ;
} else {
// Use LSE as the RTC Clock Source
RCC_RTCCLKConfig ( RCC_RTCCLKSource_LSE ) ;
// record that we are using the LSE
rtc_info | = RTC_INFO_USE_LSE ;
}
// Note: LSI is around (32KHz), these dividers should work either way
// ck_spre(1Hz) = RTCCLK(LSE) /(uwAsynchPrediv + 1)*(uwSynchPrediv + 1)
uint32_t uwSynchPrediv = 0xFF ;
uint32_t uwAsynchPrediv = 0x7F ;
// Enable the RTC Clock
RCC_RTCCLKCmd ( ENABLE ) ;
// Wait for RTC APB registers synchronisation
RTC_WaitForSynchro ( ) ;
// Configure the RTC data register and RTC prescaler
RTC_InitTypeDef RTC_InitStructure ;
RTC_InitStructure . RTC_AsynchPrediv = uwAsynchPrediv ;
RTC_InitStructure . RTC_SynchPrediv = uwSynchPrediv ;
RTC_InitStructure . RTC_HourFormat = RTC_HourFormat_24 ;
RTC_Init ( & RTC_InitStructure ) ;
// Set the date (BCD)
RTC_DateTypeDef RTC_DateStructure ;
RTC_DateStructure . RTC_Year = 0x13 ;
RTC_DateStructure . RTC_Month = RTC_Month_October ;
RTC_DateStructure . RTC_Date = 0x26 ;
RTC_DateStructure . RTC_WeekDay = RTC_Weekday_Saturday ;
RTC_SetDate ( RTC_Format_BCD , & RTC_DateStructure ) ;
// Set the time (BCD)
RTC_TimeTypeDef RTC_TimeStructure ;
RTC_TimeStructure . RTC_H12 = RTC_H12_AM ;
RTC_TimeStructure . RTC_Hours = 0x01 ;
RTC_TimeStructure . RTC_Minutes = 0x53 ;
RTC_TimeStructure . RTC_Seconds = 0x00 ;
RTC_SetTime ( RTC_Format_BCD , & RTC_TimeStructure ) ;
// Indicator for the RTC configuration
RTC_WriteBackupRegister ( RTC_BKP_DR0 , 0x32F2 ) ;
}
# endif
STATIC HAL_StatusTypeDef PYB_RTC_Init ( RTC_HandleTypeDef * hrtc ) ;
STATIC void PYB_RTC_MspInit_Kick ( RTC_HandleTypeDef * hrtc , bool rtc_use_lse ) ;
STATIC HAL_StatusTypeDef PYB_RTC_MspInit_Finalise ( RTC_HandleTypeDef * hrtc ) ;
STATIC void RTC_CalendarConfig ( void ) ;
# if defined(MICROPY_HW_RTC_USE_LSE) && MICROPY_HW_RTC_USE_LSE
@ -165,8 +72,40 @@ STATIC bool rtc_use_lse = true;
# else
STATIC bool rtc_use_lse = false ;
# endif
STATIC uint32_t rtc_startup_tick ;
STATIC bool rtc_need_init_finalise = false ;
// check if LSE exists
// not well tested, should probably be removed
STATIC bool lse_magic ( void ) {
#if 0
uint32_t mode_in = GPIOC - > MODER & 0x3fffffff ;
uint32_t mode_out = mode_in | 0x40000000 ;
GPIOC - > MODER = mode_out ;
GPIOC - > OTYPER & = 0x7fff ;
GPIOC - > BSRRH = 0x8000 ;
GPIOC - > OSPEEDR & = 0x3fffffff ;
GPIOC - > PUPDR & = 0x3fffffff ;
int i = 0xff0 ;
__IO int d = 0 ;
uint32_t tc = 0 ;
__IO uint32_t j ;
while ( i ) {
GPIOC - > MODER = mode_out ;
GPIOC - > MODER = mode_in ;
for ( j = 0 ; j < d ; j + + ) ;
i - - ;
if ( ( GPIOC - > IDR & 0x8000 ) = = 0 ) {
tc + + ;
}
}
return ( tc < 0xff0 ) ? true : false ;
# else
return false ;
# endif
}
void rtc_init ( void ) {
void rtc_init_start ( void ) {
RTCHandle . Instance = RTC ;
/* Configure RTC prescaler and RTC data registers */
@ -184,6 +123,7 @@ void rtc_init(void) {
RTCHandle . Init . OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH ;
RTCHandle . Init . OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN ;
rtc_need_init_finalise = false ;
if ( ( RCC - > BDCR & ( RCC_BDCR_LSEON | RCC_BDCR_LSERDY ) ) = = ( RCC_BDCR_LSEON | RCC_BDCR_LSERDY ) ) {
// LSE is enabled & ready --> no need to (re-)init RTC
// remove Backup Domain write protection
@ -193,8 +133,8 @@ void rtc_init(void) {
// provide some status information
rtc_info | = 0x40000 | ( RCC - > BDCR & 7 ) | ( RCC - > CSR & 3 ) < < 8 ;
return ;
} else if ( ( RCC - > BDCR & RCC_BDCR_RTCSEL ) = = RCC_BDCR_RTCSEL_1 ) {
// LSI is already active
} else if ( ( ( RCC - > BDCR & RCC_BDCR_RTCSEL ) = = RCC_BDCR_RTCSEL_1 ) & & ( ( RCC - > CSR & 3 ) = = 3 ) ) {
// LSI configured & enabled & ready --> no need to (re-)init RTC
// remove Backup Domain write protection
HAL_PWR_EnableBkUpAccess ( ) ;
// Clear source Reset Flag
@ -204,16 +144,33 @@ void rtc_init(void) {
rtc_info | = 0x80000 | ( RCC - > BDCR & 7 ) | ( RCC - > CSR & 3 ) < < 8 ;
return ;
}
rtc_startup_tick = HAL_GetTick ( ) ;
rtc_info = 0x3f000000 | ( rtc_startup_tick & 0xffffff ) ;
if ( rtc_use_lse ) {
if ( lse_magic ( ) ) {
// don't even try LSE
rtc_use_lse = false ;
rtc_info & = ~ 0x01000000 ;
}
}
PYB_RTC_MspInit_Kick ( & RTCHandle , rtc_use_lse ) ;
}
mp_uint_t tick = HAL_GetTick ( ) ;
void rtc_init_finalise ( ) {
if ( ! rtc_need_init_finalise ) {
return ;
}
if ( HAL_RTC_Init ( & RTCHandle ) ! = HAL_OK ) {
rtc_info = 0x20000000 | ( rtc_use_lse < < 28 ) ;
if ( PYB_RTC_Init ( & RTCHandle ) ! = HAL_OK ) {
if ( rtc_use_lse ) {
// fall back to LSI...
rtc_use_lse = false ;
rtc_startup_tick = HAL_GetTick ( ) ;
PYB_RTC_MspInit_Kick ( & RTCHandle , rtc_use_lse ) ;
HAL_PWR_EnableBkUpAccess ( ) ;
RTCHandle . State = HAL_RTC_STATE_RESET ;
if ( HAL_RTC_Init ( & RTCHandle ) ! = HAL_OK ) {
if ( PYB _RTC_Init( & RTCHandle ) ! = HAL_OK ) {
rtc_info = 0x0100ffff ; // indicate error
return ;
}
@ -225,11 +182,10 @@ void rtc_init(void) {
}
// record how long it took for the RTC to start up
rtc_info = HAL_GetTick ( ) - tick ;
rtc_info | = ( HAL_GetTick ( ) - rtc_startup_ tick) & 0xffff ;
// fresh reset; configure RTC Calendar
RTC_CalendarConfig ( ) ;
if ( __HAL_RCC_GET_FLAG ( RCC_FLAG_PORRST ) ! = RESET ) {
// power on reset occurred
rtc_info | = 0x10000 ;
@ -240,46 +196,118 @@ void rtc_init(void) {
}
// Clear source Reset Flag
__HAL_RCC_CLEAR_RESET_FLAGS ( ) ;
rtc_need_init_finalise = false ;
}
STATIC void RTC_CalendarConfig ( void ) {
// set the date to 1st Jan 2014
RTC_DateTypeDef date ;
date . Year = 14 ;
date . Month = 1 ;
date . Date = 1 ;
date . WeekDay = RTC_WEEKDAY_WEDNESDAY ;
STATIC HAL_StatusTypeDef PYB_RCC_OscConfig ( RCC_OscInitTypeDef * RCC_OscInitStruct ) {
/*------------------------------ LSI Configuration -------------------------*/
if ( ( RCC_OscInitStruct - > OscillatorType & RCC_OSCILLATORTYPE_LSI ) = = RCC_OSCILLATORTYPE_LSI ) {
// Check the LSI State
if ( RCC_OscInitStruct - > LSIState ! = RCC_LSI_OFF ) {
// Enable the Internal Low Speed oscillator (LSI).
__HAL_RCC_LSI_ENABLE ( ) ;
} else {
// Disable the Internal Low Speed oscillator (LSI).
__HAL_RCC_LSI_DISABLE ( ) ;
}
}
if ( HAL_RTC_SetDate ( & RTCHandle , & date , FORMAT_BIN ) ! = HAL_OK ) {
// init error
return ;
/*------------------------------ LSE Configuration -------------------------*/
if ( ( RCC_OscInitStruct - > OscillatorType & RCC_OSCILLATORTYPE_LSE ) = = RCC_OSCILLATORTYPE_LSE ) {
// Enable Power Clock
__PWR_CLK_ENABLE ( ) ;
HAL_PWR_EnableBkUpAccess ( ) ;
uint32_t tickstart = HAL_GetTick ( ) ;
# if defined(MCU_SERIES_F7)
//__HAL_RCC_PWR_CLK_ENABLE();
// Enable write access to Backup domain
//PWR->CR1 |= PWR_CR1_DBP;
// Wait for Backup domain Write protection disable
while ( ( PWR - > CR1 & PWR_CR1_DBP ) = = RESET ) {
if ( HAL_GetTick ( ) - tickstart > RCC_DBP_TIMEOUT_VALUE ) {
return HAL_TIMEOUT ;
}
}
# else
// Enable write access to Backup domain
//PWR->CR |= PWR_CR_DBP;
// Wait for Backup domain Write protection disable
while ( ( PWR - > CR & PWR_CR_DBP ) = = RESET ) {
if ( HAL_GetTick ( ) - tickstart > DBP_TIMEOUT_VALUE ) {
return HAL_TIMEOUT ;
}
}
# endif
// set the time to 00:00:00
RTC_TimeTypeDef time ;
time . Hours = 0 ;
time . Minutes = 0 ;
time . Seconds = 0 ;
time . TimeFormat = RTC_HOURFORMAT12_AM ;
time . DayLightSaving = RTC_DAYLIGHTSAVING_NONE ;
time . StoreOperation = RTC_STOREOPERATION_RESET ;
// Set the new LSE configuration
__HAL_RCC_LSE_CONFIG ( RCC_OscInitStruct - > LSEState ) ;
}
if ( HAL_RTC_SetTime ( & RTCHandle , & time , FORMAT_BIN ) ! = HAL_OK ) {
// init error
return ;
return HAL_OK ;
}
STATIC HAL_StatusTypeDef PYB_RTC_Init ( RTC_HandleTypeDef * hrtc ) {
// Check the RTC peripheral state
if ( hrtc = = NULL ) {
return HAL_ERROR ;
}
if ( hrtc - > State = = HAL_RTC_STATE_RESET ) {
// Allocate lock resource and initialize it
hrtc - > Lock = HAL_UNLOCKED ;
// Initialize RTC MSP
if ( PYB_RTC_MspInit_Finalise ( hrtc ) ! = HAL_OK ) {
return HAL_ERROR ;
}
}
/*
Note : Care must be taken when HAL_RCCEx_PeriphCLKConfig ( ) is used to select
the RTC clock source ; in this case the Backup domain will be reset in
order to modify the RTC Clock source , as consequence RTC registers ( including
the backup registers ) and RCC_BDCR register are set to their reset values .
*/
void HAL_RTC_MspInit ( RTC_HandleTypeDef * hrtc ) {
RCC_OscInitTypeDef RCC_OscInitStruct ;
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct ;
// Set RTC state
hrtc - > State = HAL_RTC_STATE_BUSY ;
// Disable the write protection for RTC registers
__HAL_RTC_WRITEPROTECTION_DISABLE ( hrtc ) ;
// Set Initialization mode
if ( RTC_EnterInitMode ( hrtc ) ! = HAL_OK ) {
// Enable the write protection for RTC registers
__HAL_RTC_WRITEPROTECTION_ENABLE ( hrtc ) ;
// Set RTC state
hrtc - > State = HAL_RTC_STATE_ERROR ;
return HAL_ERROR ;
} else {
// Clear RTC_CR FMT, OSEL and POL Bits
hrtc - > Instance - > CR & = ( ( uint32_t ) ~ ( RTC_CR_FMT | RTC_CR_OSEL | RTC_CR_POL ) ) ;
// Set RTC_CR register
hrtc - > Instance - > CR | = ( uint32_t ) ( hrtc - > Init . HourFormat | hrtc - > Init . OutPut | hrtc - > Init . OutPutPolarity ) ;
// Configure the RTC PRER
hrtc - > Instance - > PRER = ( uint32_t ) ( hrtc - > Init . SynchPrediv ) ;
hrtc - > Instance - > PRER | = ( uint32_t ) ( hrtc - > Init . AsynchPrediv < < 16 ) ;
// Exit Initialization mode
hrtc - > Instance - > ISR & = ( uint32_t ) ~ RTC_ISR_INIT ;
# if defined(MCU_SERIES_F7)
hrtc - > Instance - > OR & = ( uint32_t ) ~ RTC_OR_ALARMTYPE ;
hrtc - > Instance - > OR | = ( uint32_t ) ( hrtc - > Init . OutPutType ) ;
# else
hrtc - > Instance - > TAFCR & = ( uint32_t ) ~ RTC_TAFCR_ALARMOUTTYPE ;
hrtc - > Instance - > TAFCR | = ( uint32_t ) ( hrtc - > Init . OutPutType ) ;
# endif
// Enable the write protection for RTC registers
__HAL_RTC_WRITEPROTECTION_ENABLE ( hrtc ) ;
// Set RTC state
hrtc - > State = HAL_RTC_STATE_READY ;
return HAL_OK ;
}
}
STATIC void PYB_RTC_MspInit_Kick ( RTC_HandleTypeDef * hrtc , bool rtc_use_lse ) {
/* To change the source clock of the RTC feature (LSE, LSI), You have to:
- Enable the power clock using __PWR_CLK_ENABLE ( )
- Enable write access using HAL_PWR_EnableBkUpAccess ( ) function before to
@ -291,6 +319,7 @@ void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc) {
// RTC clock source uses LSE (external crystal) only if relevant
// configuration variable is set. Otherwise it uses LSI (internal osc).
RCC_OscInitTypeDef RCC_OscInitStruct ;
RCC_OscInitStruct . OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE ;
RCC_OscInitStruct . PLL . PLLState = RCC_PLL_NONE ;
if ( rtc_use_lse ) {
@ -300,11 +329,36 @@ void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc) {
RCC_OscInitStruct . LSEState = RCC_LSE_OFF ;
RCC_OscInitStruct . LSIState = RCC_LSI_ON ;
}
if ( HAL_RCC_OscConfig ( & RCC_OscInitStruct ) ! = HAL_OK ) {
//Error_Handler();
return ;
PYB_RCC_OscConfig ( & RCC_OscInitStruct ) ;
// now ramp up osc. in background and flag calendear init needed
rtc_need_init_finalise = true ;
}
# define PYB_LSE_TIMEOUT_VALUE 1000 // ST docs spec 2000 ms LSE startup, seems to be too pessimistic
# define PYB_LSI_TIMEOUT_VALUE 500 // this is way too pessimistic, typ. < 1ms
STATIC HAL_StatusTypeDef PYB_RTC_MspInit_Finalise ( RTC_HandleTypeDef * hrtc ) {
// we already had a kick so now wait for the corresponding ready state...
if ( rtc_use_lse ) {
// we now have to wait for LSE ready or timeout
uint32_t tickstart = rtc_startup_tick ;
while ( __HAL_RCC_GET_FLAG ( RCC_FLAG_LSERDY ) = = RESET ) {
if ( ( HAL_GetTick ( ) - tickstart ) > PYB_LSE_TIMEOUT_VALUE ) {
return HAL_TIMEOUT ;
}
}
} else {
// we now have to wait for LSI ready or timeout
uint32_t tickstart = rtc_startup_tick ;
while ( __HAL_RCC_GET_FLAG ( RCC_FLAG_LSIRDY ) = = RESET ) {
if ( ( HAL_GetTick ( ) - tickstart ) > PYB_LSI_TIMEOUT_VALUE ) {
return HAL_TIMEOUT ;
}
}
}
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct ;
PeriphClkInitStruct . PeriphClockSelection = RCC_PERIPHCLK_RTC ;
if ( rtc_use_lse ) {
PeriphClkInitStruct . RTCClockSelection = RCC_RTCCLKSOURCE_LSE ;
@ -313,15 +367,40 @@ void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc) {
}
if ( HAL_RCCEx_PeriphCLKConfig ( & PeriphClkInitStruct ) ! = HAL_OK ) {
//Error_Handler();
return ;
return HAL_ERROR ;
}
// enable RTC peripheral clock
__HAL_RCC_RTC_ENABLE ( ) ;
return HAL_OK ;
}
STATIC void RTC_CalendarConfig ( void ) {
// set the date to 1st Jan 2015
RTC_DateTypeDef date ;
date . Year = 15 ;
date . Month = 1 ;
date . Date = 1 ;
date . WeekDay = RTC_WEEKDAY_THURSDAY ;
if ( HAL_RTC_SetDate ( & RTCHandle , & date , FORMAT_BIN ) ! = HAL_OK ) {
// init error
return ;
}
void HAL_RTC_MspDeInit ( RTC_HandleTypeDef * hrtc ) {
__HAL_RCC_RTC_DISABLE ( ) ;
// set the time to 00:00:00
RTC_TimeTypeDef time ;
time . Hours = 0 ;
time . Minutes = 0 ;
time . Seconds = 0 ;
time . TimeFormat = RTC_HOURFORMAT12_AM ;
time . DayLightSaving = RTC_DAYLIGHTSAVING_NONE ;
time . StoreOperation = RTC_STOREOPERATION_RESET ;
if ( HAL_RTC_SetTime ( & RTCHandle , & time , FORMAT_BIN ) ! = HAL_OK ) {
// init error
return ;
}
}
/******************************************************************************/
@ -369,7 +448,25 @@ MP_DEFINE_CONST_FUN_OBJ_1(pyb_rtc_info_obj, pyb_rtc_info);
/// `weekday` is 1-7 for Monday through Sunday.
///
/// `subseconds` counts down from 255 to 0
# define MEG_DIV_64 (1000000 / 64)
# define MEG_DIV_SCALE ((RTC_SYNCH_PREDIV + 1) / 64)
# if defined(MICROPY_HW_RTC_USE_US) && MICROPY_HW_RTC_USE_US
uint32_t rtc_subsec_to_us ( uint32_t ss ) {
return ( ( RTC_SYNCH_PREDIV - ss ) * MEG_DIV_64 ) / MEG_DIV_SCALE ;
}
uint32_t rtc_us_to_subsec ( uint32_t us ) {
return RTC_SYNCH_PREDIV - ( us * MEG_DIV_SCALE / MEG_DIV_64 ) ;
}
# else
# define rtc_us_to_subsec
# define rtc_subsec_to_us
# endif
mp_obj_t pyb_rtc_datetime ( mp_uint_t n_args , const mp_obj_t * args ) {
rtc_init_finalise ( ) ;
if ( n_args = = 1 ) {
// get date and time
// note: need to call get time then get date to correctly access the registers
@ -385,7 +482,7 @@ mp_obj_t pyb_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) {
mp_obj_new_int ( time . Hours ) ,
mp_obj_new_int ( time . Minutes ) ,
mp_obj_new_int ( time . Seconds ) ,
mp_obj_new_int ( time . SubSeconds ) ,
mp_obj_new_int ( rtc_subsec_to_us ( time . SubSeconds ) ) ,
} ;
return mp_obj_new_tuple ( 8 , tuple ) ;
} else {
@ -404,7 +501,7 @@ mp_obj_t pyb_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) {
time . Hours = mp_obj_get_int ( items [ 4 ] ) ;
time . Minutes = mp_obj_get_int ( items [ 5 ] ) ;
time . Seconds = mp_obj_get_int ( items [ 6 ] ) ;
time . SubSeconds = mp_obj_get_int ( items [ 7 ] ) ;
time . SubSeconds = rtc_us_to_subsec ( mp_obj_get_int ( items [ 7 ] ) ) ;
time . TimeFormat = RTC_HOURFORMAT12_AM ;
time . DayLightSaving = RTC_DAYLIGHTSAVING_NONE ;
time . StoreOperation = RTC_STOREOPERATION_SET ;
@ -429,6 +526,8 @@ mp_obj_t pyb_rtc_wakeup(mp_uint_t n_args, const mp_obj_t *args) {
// wucksel=0b110 is 1Hz clock with 0x10000 added to wut
// so a 1 second wakeup could be wut=2047, wucksel=0b000, or wut=4095, wucksel=0b001, etc
rtc_init_finalise ( ) ;
// disable wakeup IRQ while we configure it
HAL_NVIC_DisableIRQ ( RTC_WKUP_IRQn ) ;
@ -539,14 +638,32 @@ MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_rtc_wakeup_obj, 2, 4, pyb_rtc_wakeup);
// When an integer argument is provided, check that it falls in the range [-511 to 512]
// and set the calibration value; otherwise return calibration value
mp_obj_t pyb_rtc_calibration ( mp_uint_t n_args , const mp_obj_t * args ) {
rtc_init_finalise ( ) ;
mp_int_t cal ;
if ( n_args = = 2 ) {
cal = mp_obj_get_int ( args [ 1 ] ) ;
mp_uint_t cal_p , cal_m ;
if ( cal < - 511 | | cal > 512 ) {
# if defined(MICROPY_HW_RTC_USE_CALOUT) && MICROPY_HW_RTC_USE_CALOUT
if ( ( cal & 0xfffe ) = = 0x0ffe ) {
// turn on/off X18 (PC13) 512Hz output
// Note:
// Output will stay active even in VBAT mode (and inrease current)
if ( cal & 1 ) {
HAL_RTCEx_SetCalibrationOutPut ( & RTCHandle , RTC_CALIBOUTPUT_512HZ ) ;
} else {
HAL_RTCEx_DeactivateCalibrationOutPut ( & RTCHandle ) ;
}
return mp_obj_new_int ( cal & 1 ) ;
} else {
nlr_raise ( mp_obj_new_exception_msg ( & mp_type_ValueError ,
" calibration value out of range " ) ) ;
}
# else
nlr_raise ( mp_obj_new_exception_msg ( & mp_type_ValueError ,
" calibration value out of range " ) ) ;
# endif
}
if ( cal > 0 ) {
cal_p = RTC_SMOOTHCALIB_PLUSPULSES_SET ;
cal_m = 512 - cal ;
T S
9 years ago
Damien George