diff options
Diffstat (limited to 'os/hal/platforms')
| -rw-r--r-- | os/hal/platforms/STM32/rtc_lld.c | 264 | ||||
| -rw-r--r-- | os/hal/platforms/STM32/rtc_lld.h | 130 | ||||
| -rw-r--r-- | os/hal/platforms/STM32F1xx/platform.mk | 3 |
3 files changed, 396 insertions, 1 deletions
diff --git a/os/hal/platforms/STM32/rtc_lld.c b/os/hal/platforms/STM32/rtc_lld.c new file mode 100644 index 000000000..1ddbc0903 --- /dev/null +++ b/os/hal/platforms/STM32/rtc_lld.c @@ -0,0 +1,264 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file STM32/rtc_lld.c
+ * @brief STM32 RTC subsystem low level driver header.
+ *
+ * @addtogroup RTC
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+
+#if HAL_USE_RTC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/** @brief RTC driver identifier.*/
+RTCDriver RTCD;
+
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Shared IRQ handler.
+ *
+ * @param[in] rtcp pointer to a @p RTCDriver object
+ */
+#if RTC_SUPPORTS_CALLBACKS
+
+static void rtc_lld_serve_interrupt(RTCDriver *rtcp){
+ chSysLockFromIsr();
+
+ if ((RTC->CRH & RTC_CRH_SECIE) && \
+ (RTC->CRL & RTC_CRL_SECF) && \
+ (rtcp->config->second_cb != NULL)){
+ rtcp->config->second_cb(rtcp);
+ RTC->CRL &= ~RTC_CRL_SECF;
+ }
+ if ((RTC->CRH & RTC_CRH_ALRIE) && \
+ (RTC->CRL & RTC_CRL_ALRF) && \
+ (rtcp->config->alarm_cb != NULL)){
+ rtcp->config->alarm_cb(rtcp);
+ RTC->CRL &= ~RTC_CRL_ALRF;
+ }
+ if ((RTC->CRH & RTC_CRH_OWIE) && \
+ (RTC->CRL & RTC_CRL_OWF) && \
+ (rtcp->config->overflow_cb != NULL)){
+ rtcp->config->overflow_cb(rtcp);
+ RTC->CRL &= ~RTC_CRL_OWF;
+ }
+
+ chSysUnlockFromIsr();
+}
+#endif /* RTC_SUPPORTS_CALLBACKS */
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/**
+ * @brief RTC interrupt handler.
+ * @isr
+ */
+#if RTC_SUPPORTS_CALLBACKS
+
+CH_IRQ_HANDLER(RTC_IRQHandler) {
+ CH_IRQ_PROLOGUE();
+ rtc_lld_serve_interrupt(&RTCD);
+ CH_IRQ_EPILOGUE();
+}
+
+#endif /* RTC_SUPPORTS_CALLBACKS */
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Enable access to registers and initialize RTC if BKP domain
+ * was previously reseted.
+ */
+void rtc_lld_init(void){
+ RCC->APB1ENR |= (RCC_APB1ENR_PWREN | RCC_APB1ENR_BKPEN); /* enable clocking */
+ PWR->CR |= PWR_CR_DBP; /* enable access */
+
+ if (!(RCC->BDCR & (RCC_BDCR_RTCEN | RCC_BDCR_LSEON))){ /* BKP domain was reseted */
+ RCC->BDCR |= RTC_CLOCK_SOURCE; /* select clocking from LSE */
+ RCC->BDCR |= RCC_BDCR_LSEON; /* switch LSE on */
+ while(!(RCC->BDCR & RCC_BDCR_LSEON)) /* wait for stabilization */
+ ;
+ RCC->BDCR |= RCC_BDCR_RTCEN; /* run clock */
+ }
+
+ #if defined(RTC_CLOCK_SOURCE) == defined(RCC_BDCR_RTCSEL_LSE)
+ uint32_t preload = STM32_LSECLK - 1UL;
+ #elif defined(RTC_CLOCK_SOURCE) == defined(RCC_BDCR_RTCSEL_LSI)
+ uint32_t preload = STM32_LSICLK - 1UL;
+ #elif defined(RTC_CLOCK_SOURCE) == defined(RCC_BDCR_RTCSEL_HSE)
+ uint32_t preload = (STM32_HSICLK / 128UL) - 1UL;
+ #else
+ #error "RTC clock source not selected"
+ #endif /* RTC_CLOCK_SOURCE == RCC_BDCR_RTCSEL_LSE */
+
+ /* Write preload register only if value changed */
+ if (preload != (((uint32_t)(RTC->PRLH)) << 16) + RTC->PRLH){
+ while(!(RTC->CRL & RTC_CRL_RTOFF))
+ ;
+
+ RTC->CRL |= RTC_CRL_CNF; /* switch on configure mode */
+ RTC->PRLH = (uint16_t)((preload >> 16) & 0b1111); /* write preloader */
+ RTC->PRLL = (uint16_t)(preload & 0xFFFF);
+ RTC->CRL &= ~RTC_CRL_CNF; /* switch off configure mode */
+
+ while(!(RTC->CRL & RTC_CRL_RTOFF)) /* wait for completion */
+ ;
+ }
+
+ /* Ensure that RTC_CNT and RTC_DIV contain actual values after enabling
+ * clocking on APB1, because these values only update when APB1 functioning.*/
+ RTC->CRL &= ~(RTC_CRL_RSF);
+ while (!(RTC->CRL & RTC_CRL_RSF))
+ ;
+
+ /* disable all interrupts and clear all even flags just to be safe */
+ RTC->CRH &= ~(RTC_CRH_OWIE | RTC_CRH_ALRIE | RTC_CRH_SECIE);
+ RTC->CRL &= ~(RTC_CRL_SECF | RTC_CRL_ALRF | RTC_CRL_OWF);
+
+ RTCD.config = NULL;
+}
+
+/**
+ * @brief Configure and start interrupt servicing routines.
+ * This function do nothing if callbacks disabled.
+ *
+ * @param[in] rtcp pointer to a @p RTCDriver object
+ * @param[in] rtccfgp pointer to a @p RTCDriver config object
+ */
+void rtc_lld_start(RTCDriver *rtcp, const RTCConfig *rtccfgp){
+ uint16_t isr_flags = 0;
+
+ NVICEnableVector(RTC_IRQn, CORTEX_PRIORITY_MASK(STM32_RTC_IRQ_PRIORITY));
+
+ rtcp->config = rtccfgp;
+ if (rtcp->config->overflow_cb != NULL){
+ isr_flags |= RTC_CRH_OWIE;
+ }
+ if (rtcp->config->alarm_cb != NULL){
+ isr_flags |= RTC_CRH_ALRIE;
+ }
+ if (rtcp->config->second_cb != NULL){
+ isr_flags |= RTC_CRH_SECIE;
+ }
+
+ /* clear all event flags just to be safe */
+ RTC->CRL &= ~(RTC_CRL_SECF | RTC_CRL_ALRF | RTC_CRL_OWF);
+ RTC->CRH |= isr_flags;
+}
+
+/**
+ * @brief Disable interrupt servicing routines.
+ */
+void rtc_lld_stop(void){
+ NVICDisableVector(RTC_IRQn);
+ RTC->CRH = 0;
+}
+
+
+/**
+ * @brief Set current time.
+ *
+ * @param[in] tv_sec time value in UNIX notation.
+ */
+void rtc_lld_set_time(uint32_t tv_sec){
+
+ while(!(RTC->CRL & RTC_CRL_RTOFF))
+ ;
+
+ RTC->CRL |= RTC_CRL_CNF; /* switch on configure mode */
+ RTC->CNTH = (uint16_t)((tv_sec >> 16) & 0xFFFF); /* write time */
+ RTC->CNTL = (uint16_t)(tv_sec & 0xFFFF);
+ RTC->CRL &= ~RTC_CRL_CNF; /* switch off configure mode */
+
+ while(!(RTC->CRL & RTC_CRL_RTOFF)) /* wait for completion */
+ ;
+}
+
+/**
+ * @brief Return current time in UNIX notation.
+ */
+inline uint32_t rtc_lld_get_sec(void){
+ return ((RTC->CNTH << 16) + RTC->CNTL);
+}
+
+/**
+ * @brief Return fractional part of current time (milliseconds).
+ */
+inline uint16_t rtc_lld_get_msec(void){
+ uint32_t time_frac = 0;
+ time_frac = (((uint32_t)RTC->DIVH) << 16) + (RTC->DIVL);
+ return(((STM32_LSECLK - time_frac) * 1000) / STM32_LSECLK);
+}
+
+/**
+ * @brief Set alarm date in UNIX notation.
+ */
+void rtc_lld_set_alarm(uint32_t tv_alarm){
+
+ while(!(RTC->CRL & RTC_CRL_RTOFF))
+ ;
+
+ RTC->CRL |= RTC_CRL_CNF; /* switch on configure mode */
+ RTC->ALRH = (uint16_t)((tv_alarm >> 16) & 0xFFFF); /* write time */
+ RTC->ALRL = (uint16_t)(tv_alarm & 0xFFFF);
+ RTC->CRL &= ~RTC_CRL_CNF; /* switch off configure mode */
+
+#if !(RTC_SUPPORTS_CALLBACKS)
+ RTC->CRL &= ~RTC_CRL_ALRF;
+ RTC->CRH |= RTC_CRH_ALRIE;
+#endif /* !(RTC_SUPPORTS_CALLBACKS) */
+
+ while(!(RTC->CRL & RTC_CRL_RTOFF)) /* wait for completion */
+ ;
+}
+
+/**
+ * @brief Get current alarm date in UNIX notation.
+ * @note Default value after reset is 0xFFFFFFFF
+ */
+inline uint32_t rtc_lld_get_alarm(void){
+ return ((RTC->ALRH << 16) + RTC->ALRL);
+}
+
+
+#endif /* HAL_USE_RTC */
+
+/** @} */
diff --git a/os/hal/platforms/STM32/rtc_lld.h b/os/hal/platforms/STM32/rtc_lld.h new file mode 100644 index 000000000..3b4f69665 --- /dev/null +++ b/os/hal/platforms/STM32/rtc_lld.h @@ -0,0 +1,130 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file STM32/rtc_lld.h
+ * @brief STM32 RTC subsystem low level driver header.
+ *
+ * @addtogroup RTC
+ * @{
+ */
+
+#ifndef _RTC_LLD_H_
+#define _RTC_LLD_H_
+
+#if HAL_USE_RTC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+/**
+ * @brief Switch to TRUE if you need callbacks from RTC. Switch to FALSE
+ * if you need only time keeping.
+ * @note Default is true.
+ */
+#if !defined(RTC_SUPPORTS_CALLBACKS) || defined(__DOXYGEN__)
+#define RTC_SUPPORTS_CALLBACKS TRUE
+#endif
+
+/**
+ * @brief Clock source selecting. LSE by default.
+ */
+#if !defined(RTC_CLOCK_SOURCE) || defined(__DOXYGEN__)
+#define RTC_CLOCK_SOURCE RCC_BDCR_RTCSEL_LSE
+#endif
+
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if HAL_USE_RTC && !STM32_HAS_RTC
+#error "RTC not present in the selected device"
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+/**
+ * @brief Structure representing an RTC driver config.
+ */
+typedef struct {
+ /**
+ * @brief Overflow callback. Set it to NULL if not used.
+ */
+ rtccb_t overflow_cb;
+
+ /**
+ * @brief Every second callback. Set it to NULL if not used.
+ */
+ rtccb_t second_cb;
+
+ /**
+ * @brief Alarm callback. Set it to NULL if not used.
+ */
+ rtccb_t alarm_cb;
+}RTCConfig;
+
+
+/**
+ * @brief Structure representing an RTC driver.
+ */
+struct RTCDriver{
+ /**
+ * @brief Pointer to RCT config.
+ */
+ const RTCConfig *config;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+extern RTCDriver RTCD;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void rtc_lld_init(void);
+ void rtc_lld_start(RTCDriver *rtcp, const RTCConfig *rtccfgp);
+ void rtc_lld_stop(void);
+ void rtc_lld_set_time(uint32_t tv_sec);
+ uint32_t rtc_lld_get_sec(void);
+ uint16_t rtc_lld_get_msec(void);
+ uint32_t rtc_lld_get_alarm(void);
+ void rtc_lld_set_alarm(uint32_t);
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* HAL_USE_RTC */
+#endif /* _RTC_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/platforms/STM32F1xx/platform.mk b/os/hal/platforms/STM32F1xx/platform.mk index 010a3f96d..26f13cd81 100644 --- a/os/hal/platforms/STM32F1xx/platform.mk +++ b/os/hal/platforms/STM32F1xx/platform.mk @@ -12,7 +12,8 @@ PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32F1xx/hal_lld.c \ ${CHIBIOS}/os/hal/platforms/STM32/DMAv1/spi_lld.c \
${CHIBIOS}/os/hal/platforms/STM32/DMAv1/uart_lld.c \
${CHIBIOS}/os/hal/platforms/STM32/DMAv1/stm32_dma.c \
- ${CHIBIOS}/os/hal/platforms/STM32/USBv1/usb_lld.c
+ ${CHIBIOS}/os/hal/platforms/STM32/USBv1/usb_lld.c \
+ ${CHIBIOS}/os/hal/platforms/STM32/rtc_lld.c
# Required include directories
PLATFORMINC = ${CHIBIOS}/os/hal/platforms/STM32F1xx \
|