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ChibiOS
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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3783 35acf78f-673a-0410-8e92-d51de3d6d3f4

This commit is contained in:
gdisirio 2012-01-10 18:14:24 +00:00
parent a40e2315db
commit 8824a54e5e
12 changed files with 293 additions and 119 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
os/hal/platforms/STM32/RTCv1/rtc_lld.c
View File

@ -87,7 +87,7 @@ static void rtc_lld_serve_interrupt(RTCDriver *rtcp) {
static void rtc_lld_wait_write(void) {
/* Waits registers write completion.*/
while (!(RTC->CRL & RTC_CRL_RTOFF))
while ((RTC->CRL & RTC_CRL_RTOFF) == 0)
;
}
@ -122,50 +122,6 @@ CH_IRQ_HANDLER(RTC_IRQHandler) {
* @notapi
*/
void rtc_lld_init(void){
uint32_t preload;
rccEnableBKPInterface(FALSE);
/* Enables access to BKP registers.*/
PWR->CR |= PWR_CR_DBP;
/* If the RTC is not enabled then performs a reset of the backup domain.*/
if (!(RCC->BDCR & RCC_BDCR_RTCEN)) {
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
}
#if STM32_RTC == STM32_RTC_LSE
#define RTC_CLK STM32_LSECLK
if (!(RCC->BDCR & RCC_BDCR_LSEON)) {
RCC->BDCR |= RCC_BDCR_LSEON;
while (!(RCC->BDCR & RCC_BDCR_LSERDY))
;
}
preload = STM32_LSECLK - 1;
#elif STM32_RTC == STM32_RTC_LSI
#define RTC_CLK STM32_LSICLK
/* TODO: Move the LSI clock initialization in the HAL low level driver.*/
RCC->CSR |= RCC_CSR_LSION;
while (!(RCC->CSR & RCC_CSR_LSIRDY))
;
/* According to errata sheet we must wait additional 100 uS for
stabilization.
TODO: Change this code, software loops are not reliable.*/
volatile uint32_t tmo = (STM32_SYSCLK / 1000000) * 100;
while (tmo--)
;
preload = STM32_LSICLK - 1;
#elif STM32_RTC == STM32_RTC_HSE
#define RTC_CLK (STM32_HSECLK / 128)
preload = (STM32_HSECLK / 128) - 1;
#endif
/* Selects clock source (previously enabled and stabilized).*/
RCC->BDCR = (RCC->BDCR & ~RCC_BDCR_RTCSEL) | STM32_RTC;
/* RTC enabled regardless its previous status.*/
RCC->BDCR |= RCC_BDCR_RTCEN;
/* Ensure that RTC_CNT and RTC_DIV contain actual values after enabling
clocking on APB1, because these values only update when APB1
@ -175,15 +131,15 @@ void rtc_lld_init(void){
;
/* Write preload register only if its value differs.*/
if (preload != ((((uint32_t)(RTC->PRLH)) << 16) + (uint32_t)RTC->PRLL)) {
rtc_lld_wait_write();
if (STM32_RTCCLK != (((uint32_t)(RTC->PRLH)) << 16) +
((uint32_t)RTC->PRLL) + 1) {
/* Enters configuration mode and writes PRLx registers then leaves the
configuration mode.*/
rtc_lld_wait_write();
RTC->CRL |= RTC_CRL_CNF;
RTC->PRLH = (uint16_t)(preload >> 16);
RTC->PRLL = (uint16_t)(preload & 0xFFFF);
RTC->PRLH = (uint16_t)((STM32_RTCCLK - 1) >> 16);
RTC->PRLL = (uint16_t)((STM32_RTCCLK - 1) & 0xFFFF);
RTC->CRL &= ~RTC_CRL_CNF;
}
@ -209,7 +165,6 @@ void rtc_lld_set_time(RTCDriver *rtcp, const RTCTime *timespec) {
(void)rtcp;
rtc_lld_wait_write();
RTC->CRL |= RTC_CRL_CNF;
RTC->CNTH = (uint16_t)(timespec->tv_sec >> 16);
RTC->CNTL = (uint16_t)(timespec->tv_sec & 0xFFFF);
@ -229,17 +184,15 @@ void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec) {
uint32_t time_frac;
READ_REGISTERS:
timespec->tv_sec = ((uint32_t)(RTC->CNTH) << 16) + RTC->CNTL;
time_frac = (((uint32_t)RTC->DIVH) << 16) + (uint32_t)RTC->DIVL;
/* The read is repeated until we are able to do it twice and obtain the
same result.*/
do {
timespec->tv_sec = ((uint32_t)(RTC->CNTH) << 16) + RTC->CNTL;
time_frac = (((uint32_t)RTC->DIVH) << 16) + (uint32_t)RTC->DIVL;
} while ((timespec->tv_sec) != (((uint32_t)(RTC->CNTH) << 16) + RTC->CNTL));
/* If second counter updated between reading of integer and fractional parts
* we must reread both values. */
if((timespec->tv_sec) != (((uint32_t)(RTC->CNTH) << 16) + RTC->CNTL)){
goto READ_REGISTERS;
}
timespec->tv_msec = (uint16_t)(((RTC_CLK - 1 - time_frac) * 1000) / RTC_CLK);
timespec->tv_msec = (uint16_t)(((STM32_RTCCLK - 1 - time_frac) * 1000) /
STM32_RTCCLK);
}
/**
@ -260,10 +213,10 @@ void rtc_lld_set_alarm(RTCDriver *rtcp,
(void)rtcp;
(void)alarm;
rtc_lld_wait_write();
/* Enters configuration mode and writes ALRHx registers then leaves the
configuration mode.*/
rtc_lld_wait_write();
RTC->CRL |= RTC_CRL_CNF;
if (alarmspec != NULL) {
RTC->ALRH = (uint16_t)(alarmspec->tv_sec >> 16);
@ -315,17 +268,14 @@ void rtc_lld_set_callback(RTCDriver *rtcp, rtccb_t callback) {
rtcp->callback = callback;
/* Interrupts are enabled only after setting up the callback, this
way there is no need to check for the NULL callback pointer inside
the IRQ handler.*/
rtc_lld_wait_write();
way there is no need to check for the NULL callback pointer inside
the IRQ handler.*/
RTC->CRL &= ~(RTC_CRL_OWF | RTC_CRL_ALRF | RTC_CRL_SECF);
rtc_lld_wait_write();
nvicEnableVector(RTC_IRQn, CORTEX_PRIORITY_MASK(STM32_RTC_IRQ_PRIORITY));
RTC->CRH |= RTC_CRH_OWIE | RTC_CRH_ALRIE | RTC_CRH_SECIE;
}
else {
nvicDisableVector(RTC_IRQn);
rtc_lld_wait_write();
RTC->CRL = 0;
RTC->CRH = 0;
}

5
os/hal/platforms/STM32/RTCv1/rtc_lld.h
View File

@ -61,9 +61,8 @@
#error "RTC not present in the selected device"
#endif
#if !(STM32_RTC == STM32_RTC_LSE) && !(STM32_RTC == STM32_RTC_LSI) && \
!(STM32_RTC == STM32_RTC_HSE)
#error "invalid source selected for RTC clock"
#if STM32_RTCCLK == 0
#error "RTC clock not enabled"
#endif
/*===========================================================================*/

67
os/hal/platforms/STM32F1xx/hal_lld.c
View File

@ -41,6 +41,47 @@
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Initializes the backup domain.
*/
static void hal_lld_backup_domain_init(void) {
/* Backup domain access enabled during initialization.*/
PWR->CR |= PWR_CR_DBP;
/* RTC clock initialization.*/
#if STM32_RTCSEL == STM32_RTCSEL_NOCLOCK
/* RTC clock not required, backup domain reset as initialization.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
#else /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* If the backup domain hasn't been initialized yet then proceed with
initialization.*/
if (!(RCC->BDCR & RCC_BDCR_LSEON)) {
/* Backup domain reset.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
/* If enabled then the LSE is started.*/
#if STM32_LSE_ENABLED
RCC->BDCR |= RCC_BDCR_LSEON;
while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
; /* Waits until LSE is stable. */
#endif
/* Selects clock source.*/
RCC->BDCR = (RCC->BDCR & ~RCC_BDCR_RTCSEL) | STM32_RTCSEL;
/* RTC enabled regardless its previous status, this will also prevent
successive initializations.*/
RCC->BDCR |= RCC_BDCR_RTCEN;
}
#endif /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* Backup domain access disabled for operations safety.*/
PWR->CR &= ~PWR_CR_DBP;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
@ -70,13 +111,19 @@ void hal_lld_init(void) {
/* DWT cycle counter enable.*/
DWT_CTRL |= DWT_CTRL_CYCCNTENA;
/* PWR and BD clocks enabled.*/
rccEnablePWRInterface(FALSE);
rccEnableBKPInterface(FALSE);
/* Initializes the backup domain.*/
hal_lld_backup_domain_init();
#if defined(STM32_DMA_REQUIRED)
dmaInit();
#endif
/* Programmable voltage detector enable.*/
#if STM32_PVD_ENABLE
rccEnablePWRInterface(FALSE);
PWR->CR |= PWR_CR_PVDE | (STM32_PLS & STM32_PLS_MASK);
#endif /* STM32_PVD_ENABLE */
}
@ -122,15 +169,6 @@ void stm32_clock_init(void) {
; /* Waits until LSI is stable. */
#endif
#if STM32_LSE_ENABLED
/* LSE activation, have to unlock the register.*/
PWR->CR |= PWR_CR_DBP;
RCC->BDCR |= RCC_BDCR_LSEON;
while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
; /* Waits until LSE is stable. */
PWR->CR &= ~PWR_CR_DBP;
#endif
#if STM32_ACTIVATE_PLL
/* PLL activation.*/
RCC->CFGR |= STM32_PLLMUL | STM32_PLLXTPRE | STM32_PLLSRC;
@ -193,15 +231,6 @@ void stm32_clock_init(void) {
; /* Waits until LSI is stable. */
#endif
#if STM32_LSE_ENABLED
/* LSE activation, have to unlock the register.*/
PWR->CR |= PWR_CR_DBP;
RCC->BDCR |= RCC_BDCR_LSEON;
while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
; /* Waits until LSE is stable. */
PWR->CR &= ~PWR_CR_DBP;
#endif
/* Settings of various dividers and multipliers in CFGR2.*/
RCC->CFGR2 = STM32_PLL3MUL | STM32_PLL2MUL | STM32_PREDIV2 |
STM32_PREDIV1 | STM32_PREDIV1SRC;

20
os/hal/platforms/STM32F1xx/hal_lld_f100.h
View File

@ -648,8 +648,9 @@
#error "HSI not enabled, required by STM32_SW and STM32_PLLSRC"
#endif
#if (STM32_MCOSEL == STM32_MCOSEL_HSI) || \
((STM32_MCOSEL == STM32_MCOSEL_PLLDIV2) && (STM32_PLLSRC == STM32_PLLSRC_HSI))
#if (STM32_MCOSEL == STM32_MCOSEL_HSI) || \
((STM32_MCOSEL == STM32_MCOSEL_PLLDIV2) && \
(STM32_PLLSRC == STM32_PLLSRC_HSI))
#error "HSI not enabled, required by STM32_MCOSEL"
#endif
@ -870,6 +871,21 @@
#error "STM32_PCLK2 exceeding maximum frequency (STM32_PCLK2_MAX)"
#endif
/**
* @brief RTC clock.
*/
#if (STM32_RTCSEL == STM32_RTCSEL_LSE) || defined(__DOXYGEN__)
#define STM32_RTCCLK STM32_LSECLK
#elif STM32_RTCSEL == STM32_RTCSEL_LSI
#define STM32_RTCCLK STM32_LSICLK
#elif STM32_RTCSEL == STM32_RTCSEL_HSEDIV
#define STM32_RTCCLK (STM32_HSECLK / 128)
#elif STM32_RTCSEL == STM32_RTCSEL_NOCLOCK
#define STM32_RTCCLK 0
#else
#error "invalid source selected for RTC clock"
#endif
/**
* @brief ADC frequency.
*/

20
os/hal/platforms/STM32F1xx/hal_lld_f103.h
View File

@ -981,8 +981,9 @@
#error "HSI not enabled, required by STM32_SW and STM32_PLLSRC"
#endif
#if (STM32_MCOSEL == STM32_MCOSEL_HSI) || \
((STM32_MCOSEL == STM32_MCOSEL_PLLDIV2) && (STM32_PLLSRC == STM32_PLLSRC_HSI))
#if (STM32_MCOSEL == STM32_MCOSEL_HSI) || \
((STM32_MCOSEL == STM32_MCOSEL_PLLDIV2) && \
(STM32_PLLSRC == STM32_PLLSRC_HSI))
#error "HSI not enabled, required by STM32_MCOSEL"
#endif
@ -1204,6 +1205,21 @@
#error "STM32_PCLK2 exceeding maximum frequency (STM32_PCLK2_MAX)"
#endif
/**
* @brief RTC clock.
*/
#if (STM32_RTCSEL == STM32_RTCSEL_LSE) || defined(__DOXYGEN__)
#define STM32_RTCCLK STM32_LSECLK
#elif STM32_RTCSEL == STM32_RTCSEL_LSI
#define STM32_RTCCLK STM32_LSICLK
#elif STM32_RTCSEL == STM32_RTCSEL_HSEDIV
#define STM32_RTCCLK (STM32_HSECLK / 128)
#elif STM32_RTCSEL == STM32_RTCSEL_NOCLOCK
#define STM32_RTCCLK 0
#else
#error "invalid source selected for RTC clock"
#endif
/**
* @brief ADC frequency.
*/

20
os/hal/platforms/STM32F1xx/hal_lld_f105_f107.h
View File

@ -596,8 +596,9 @@
#error "HSI not enabled, required by STM32_SW and STM32_PLLSRC"
#endif
#if (STM32_MCOSEL == STM32_MCOSEL_HSI) || \
((STM32_MCOSEL == STM32_MCOSEL_PLLDIV2) && (STM32_PLLSRC == STM32_PLLSRC_HSI))
#if (STM32_MCOSEL == STM32_MCOSEL_HSI) || \
((STM32_MCOSEL == STM32_MCOSEL_PLLDIV2) && \
(STM32_PLLSRC == STM32_PLLSRC_HSI))
#error "HSI not enabled, required by STM32_MCOSEL"
#endif
@ -956,6 +957,21 @@
#error "STM32_PCLK2 exceeding maximum frequency (STM32_PCLK2_MAX)"
#endif
/**
* @brief RTC clock.
*/
#if (STM32_RTCSEL == STM32_RTCSEL_LSE) || defined(__DOXYGEN__)
#define STM32_RTCCLK STM32_LSECLK
#elif STM32_RTCSEL == STM32_RTCSEL_LSI
#define STM32_RTCCLK STM32_LSICLK
#elif STM32_RTCSEL == STM32_RTCSEL_HSEDIV
#define STM32_RTCCLK (STM32_HSECLK / 128)
#elif STM32_RTCSEL == STM32_RTCSEL_NOCLOCK
#define STM32_RTCCLK 0
#else
#error "invalid source selected for RTC clock"
#endif
/**
* @brief ADC frequency.
*/

48
os/hal/platforms/STM32F2xx/hal_lld.c
View File

@ -41,6 +41,47 @@
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Initializes the backup domain.
*/
static void hal_lld_backup_domain_init(void) {
/* Backup domain access enabled during initialization.*/
PWR->CR |= PWR_CR_DBP;
/* RTC clock initialization.*/
#if STM32_RTCSEL == STM32_RTCSEL_NOCLOCK
/* RTC clock not required, backup domain reset as initialization.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
#else /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* If the backup domain hasn't been initialized yet then proceed with
initialization.*/
if (!(RCC->BDCR & RCC_BDCR_LSEON)) {
/* Backup domain reset.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
/* If enabled then the LSE is started.*/
#if STM32_LSE_ENABLED
RCC->BDCR |= RCC_BDCR_LSEON;
while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
; /* Waits until LSE is stable. */
#endif
/* Selects clock source.*/
RCC->BDCR = (RCC->BDCR & ~RCC_BDCR_RTCSEL) | STM32_RTCSEL;
/* RTC enabled regardless its previous status, this will also prevent
successive initializations.*/
RCC->BDCR |= RCC_BDCR_RTCEN;
}
#endif /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* Backup domain access disabled for operations safety.*/
PWR->CR &= ~PWR_CR_DBP;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
@ -74,13 +115,18 @@ void hal_lld_init(void) {
/* DWT cycle counter enable.*/
DWT_CTRL |= DWT_CTRL_CYCCNTENA;
/* PWR clock enabled.*/
rccEnablePWRInterface(FALSE);
/* Initializes the backup domain.*/
hal_lld_backup_domain_init();
#if defined(STM32_DMA_REQUIRED)
dmaInit();
#endif
/* Programmable voltage detector enable.*/
#if STM32_PVD_ENABLE
rccEnablePWRInterface(FALSE);
PWR->CR |= PWR_CR_PVDE | (STM32_PLS & STM32_PLS_MASK);
#endif /* STM32_PVD_ENABLE */
}

20
os/hal/platforms/STM32F2xx/hal_lld.h
View File

@ -1229,16 +1229,6 @@
#error "invalid STM32_MCO2PRE value specified"
#endif
/**
* @brief HSE divider toward RTC clock.
*/
#if ((STM32_RTCPRE_VALUE >= 2) && (STM32_RTCPRE_VALUE <= 31)) || \
defined(__DOXYGEN__)
#define STM32_HSEDIVCLK (STM32_HSECLK / STM32_RTCPRE_VALUE)
#else
#error "invalid STM32_RTCPRE value specified"
#endif
/**
* @brief RTC HSE divider setting.
*/
@ -1249,6 +1239,16 @@
#error "invalid STM32_RTCPRE value specified"
#endif
/**
* @brief HSE divider toward RTC clock.
*/
#if ((STM32_RTCPRE_VALUE >= 2) && (STM32_RTCPRE_VALUE <= 31)) || \
defined(__DOXYGEN__)
#define STM32_HSEDIVCLK (STM32_HSECLK / STM32_RTCPRE_VALUE)
#else
#error "invalid STM32_RTCPRE value specified"
#endif
/**
* @brief RTC clock.
*/

48
os/hal/platforms/STM32F4xx/hal_lld.c
View File

@ -41,6 +41,47 @@
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Initializes the backup domain.
*/
static void hal_lld_backup_domain_init(void) {
/* Backup domain access enabled during initialization.*/
PWR->CR |= PWR_CR_DBP;
/* RTC clock initialization.*/
#if STM32_RTCSEL == STM32_RTCSEL_NOCLOCK
/* RTC clock not required, backup domain reset as initialization.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
#else /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* If the backup domain hasn't been initialized yet then proceed with
initialization.*/
if (!(RCC->BDCR & RCC_BDCR_LSEON)) {
/* Backup domain reset.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
/* If enabled then the LSE is started.*/
#if STM32_LSE_ENABLED
RCC->BDCR |= RCC_BDCR_LSEON;
while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
; /* Waits until LSE is stable. */
#endif
/* Selects clock source.*/
RCC->BDCR = (RCC->BDCR & ~RCC_BDCR_RTCSEL) | STM32_RTCSEL;
/* RTC enabled regardless its previous status, this will also prevent
successive initializations.*/
RCC->BDCR |= RCC_BDCR_RTCEN;
}
#endif /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* Backup domain access disabled for operations safety.*/
PWR->CR &= ~PWR_CR_DBP;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
@ -74,13 +115,18 @@ void hal_lld_init(void) {
/* DWT cycle counter enable.*/
DWT_CTRL |= DWT_CTRL_CYCCNTENA;
/* PWR clock enabled.*/
rccEnablePWRInterface(FALSE);
/* Initializes the backup domain.*/
hal_lld_backup_domain_init();
#if defined(STM32_DMA_REQUIRED)
dmaInit();
#endif
/* Programmable voltage detector enable.*/
#if STM32_PVD_ENABLE
rccEnablePWRInterface(FALSE);
PWR->CR |= PWR_CR_PVDE | (STM32_PLS & STM32_PLS_MASK);
#endif /* STM32_PVD_ENABLE */
}

30
os/hal/platforms/STM32F4xx/hal_lld.h
View File

@ -1249,16 +1249,6 @@
#error "invalid STM32_MCO2PRE value specified"
#endif
/**
* @brief HSE divider toward RTC clock.
*/
#if ((STM32_RTCPRE_VALUE >= 2) && (STM32_RTCPRE_VALUE <= 31)) || \
defined(__DOXYGEN__)
#define STM32_HSEDIVCLK (STM32_HSECLK / STM32_RTCPRE_VALUE)
#else
#error "invalid STM32_RTCPRE value specified"
#endif
/**
* @brief RTC HSE divider setting.
*/
@ -1269,6 +1259,16 @@
#error "invalid STM32_RTCPRE value specified"
#endif
/**
* @brief HSE divider toward RTC clock.
*/
#if ((STM32_RTCPRE_VALUE >= 2) && (STM32_RTCPRE_VALUE <= 31)) || \
defined(__DOXYGEN__)
#define STM32_HSEDIVCLK (STM32_HSECLK / STM32_RTCPRE_VALUE)
#else
#error "invalid STM32_RTCPRE value specified"
#endif
/**
* @brief RTC clock.
*/
@ -1284,6 +1284,16 @@
#error "invalid STM32_RTCSEL value specified"
#endif
/**
* @brief RTC HSE divider setting.
*/
#if ((STM32_RTCPRE_VALUE >= 2) && (STM32_RTCPRE_VALUE <= 31)) || \
defined(__DOXYGEN__)
#define STM32_RTCPRE (STM32_RTCPRE_VALUE << 16)
#else
#error "invalid STM32_RTCPRE value specified"
#endif
/**
* @brief 48MHz frequency.
*/

48
os/hal/platforms/STM32L1xx/hal_lld.c
View File

@ -41,6 +41,47 @@
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Initializes the backup domain.
*/
static void hal_lld_backup_domain_init(void) {
/* Backup domain access enabled during initialization.*/
PWR->CR |= PWR_CR_DBP;
/* RTC clock initialization.*/
#if STM32_RTCSEL == STM32_RTCSEL_NOCLOCK
/* RTC clock not required, backup domain reset as initialization.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
#else /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* If the backup domain hasn't been initialized yet then proceed with
initialization.*/
if (!(RCC->BDCR & RCC_BDCR_LSEON)) {
/* Backup domain reset.*/
RCC->BDCR = RCC_BDCR_BDRST;
RCC->BDCR = 0;
/* If enabled then the LSE is started.*/
#if STM32_LSE_ENABLED
RCC->BDCR |= RCC_BDCR_LSEON;
while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
; /* Waits until LSE is stable. */
#endif
/* Selects clock source.*/
RCC->BDCR = (RCC->BDCR & ~RCC_BDCR_RTCSEL) | STM32_RTCSEL;
/* RTC enabled regardless its previous status, this will also prevent
successive initializations.*/
RCC->BDCR |= RCC_BDCR_RTCEN;
}
#endif /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
/* Backup domain access disabled for operations safety.*/
PWR->CR &= ~PWR_CR_DBP;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
@ -71,13 +112,18 @@ void hal_lld_init(void) {
/* DWT cycle counter enable.*/
DWT_CTRL |= DWT_CTRL_CYCCNTENA;
/* PWR clock enabled.*/
rccEnablePWRInterface(FALSE);
/* Initializes the backup domain.*/
hal_lld_backup_domain_init();
#if defined(STM32_DMA_REQUIRED)
dmaInit();
#endif
/* Programmable voltage detector enable.*/
#if STM32_PVD_ENABLE
rccEnablePWRInterface(FALSE);
PWR->CR |= PWR_CR_PVDE | (STM32_PLS & STM32_PLS_MASK);
#endif /* STM32_PVD_ENABLE */
}

2
os/kernel/include/chthreads.h
View File

@ -125,7 +125,7 @@ struct Thread {
#if CH_DBG_THREADS_PROFILING || defined(__DOXYGEN__)
/**
* @brief Thread consumed time in ticks.
* @note This field can overflow.
* @note This field can overflow.
*/
volatile systime_t p_time;
#endif