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-rw-r--r--os/hal/platforms/STM32F4xx/hal_lld.h6
-rw-r--r--os/hal/platforms/STM32F4xx/platform.mk7
-rw-r--r--os/hal/platforms/STM32F4xx/rtc_lld.c269
-rw-r--r--os/hal/platforms/STM32F4xx/rtc_lld.h162
4 files changed, 442 insertions, 2 deletions
diff --git a/os/hal/platforms/STM32F4xx/hal_lld.h b/os/hal/platforms/STM32F4xx/hal_lld.h
index 1bb69958e..f292285da 100644
--- a/os/hal/platforms/STM32F4xx/hal_lld.h
+++ b/os/hal/platforms/STM32F4xx/hal_lld.h
@@ -218,6 +218,12 @@
#define STM32_MCO2SEL_HSE (2U << 30) /**< HSE clock on MCO2 pin. */
#define STM32_MCO2SEL_PLL (3U << 30) /**< PLL clock on MCO2 pin. */
+#define STM32_RTC_NOCLOCK (0 << 8) /**< No clock. */
+#define STM32_RTC_LSE (1 << 8) /**< LSE used as RTC clock. */
+#define STM32_RTC_LSI (2 << 8) /**< LSI used as RTC clock. */
+#define STM32_RTC_HSE (3 << 8) /**< HSE divided by programmable
+ prescaler used as RTC clock*/
+
/**
* @name RCC_PLLI2SCFGR register bits definitions
* @{
diff --git a/os/hal/platforms/STM32F4xx/platform.mk b/os/hal/platforms/STM32F4xx/platform.mk
index 449b40731..ce6f7bf57 100644
--- a/os/hal/platforms/STM32F4xx/platform.mk
+++ b/os/hal/platforms/STM32F4xx/platform.mk
@@ -2,6 +2,7 @@
PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32F4xx/stm32_dma.c \
${CHIBIOS}/os/hal/platforms/STM32F4xx/hal_lld.c \
${CHIBIOS}/os/hal/platforms/STM32F4xx/adc_lld.c \
+ ${CHIBIOS}/os/hal/platforms/STM32F4xx/rtc_lld.c \
${CHIBIOS}/os/hal/platforms/STM32/ext_lld.c \
${CHIBIOS}/os/hal/platforms/STM32/gpt_lld.c \
${CHIBIOS}/os/hal/platforms/STM32/icu_lld.c \
@@ -10,9 +11,11 @@ PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32F4xx/stm32_dma.c \
${CHIBIOS}/os/hal/platforms/STM32/spi_lld.c \
${CHIBIOS}/os/hal/platforms/STM32/uart_lld.c \
${CHIBIOS}/os/hal/platforms/STM32/i2c_lld.c \
- ${CHIBIOS}/os/hal/platforms/STM32/GPIOv2/pal_lld.c
+ ${CHIBIOS}/os/hal/platforms/STM32/GPIOv2/pal_lld.c \
# Required include directories
PLATFORMINC = ${CHIBIOS}/os/hal/platforms/STM32F4xx \
${CHIBIOS}/os/hal/platforms/STM32 \
- ${CHIBIOS}/os/hal/platforms/STM32/GPIOv2
+ ${CHIBIOS}/os/hal/platforms/STM32/GPIOv2 \
+
+
diff --git a/os/hal/platforms/STM32F4xx/rtc_lld.c b/os/hal/platforms/STM32F4xx/rtc_lld.c
new file mode 100644
index 000000000..93d1b8e52
--- /dev/null
+++ b/os/hal/platforms/STM32F4xx/rtc_lld.c
@@ -0,0 +1,269 @@
+/*
+ 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/RTCv1/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 RTCD1;
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Shared IRQ handler.
+ *
+ * @param[in] rtcp pointer to a @p RTCDriver object
+ *
+ * @notapi
+ */
+static void rtc_lld_serve_interrupt(RTCDriver *rtcp) {
+
+ chSysLockFromIsr();
+ rtcp->rtc_cb(rtcp, RTC_EVENT_SECOND);
+ rtcp->rtc_cb(rtcp, RTC_EVENT_ALARM);
+ rtcp->rtc_cb(rtcp, RTC_EVENT_OVERFLOW);
+ chSysUnlockFromIsr();
+}
+
+
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/**
+ * @brief RTC interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(RTC_IRQHandler) {
+
+ CH_IRQ_PROLOGUE();
+
+ rtc_lld_serve_interrupt(&RTCD1);
+
+ CH_IRQ_EPILOGUE();
+}
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Enable access to registers and initialize RTC if BKP domain
+ * was previously reseted.
+ * @note: Cold start time of LSE oscillator on STM32 platform
+ * takes about 3 seconds.
+ *
+ * @notapi
+ */
+void rtc_lld_init(void){
+ uint32_t preload;
+
+ /* 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
+ 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
+ /* 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.*/
+ uint32_t tmo = (STM32_SYSCLK / 1000000) * 100;
+ while (tmo--)
+ ;
+ preload = STM32_LSICLK - 1;
+#elif STM32_RTC == STM32_RTC_HSE
+ preload = (STM32_HSICLK / 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;
+
+ /* Calendar not init yet. */
+ if (!(RTC->ISR & RTC_ISR_INITS)){
+ /* Disable write protection on RTC registers. */
+ RTC->WPR = 0xCA;
+ RTC->WPR = 0x53;
+ /* Enter in init mode. */
+ RTC->ISR |= RTC_ISR_INIT;
+ while(!(RTC->ISR & RTC_ISR_INITF))
+ ;
+ /* Prescaler registers must be written in by two separate writes. */
+ RTC->PRER = 0;
+ RTC->PRER = 0x007F00FF;
+ /* Wait until calendar data will updated. */
+ while(!(RTC->ISR & RTC_ISR_RSF))
+ ;
+ }
+
+ /* Callback initially disabled.*/
+ RTCD1.rtc_cb = NULL;
+}
+
+/**
+ * @brief Set current time.
+ * @note Fractional part will be silently ignored. There is no possibility
+ * to change it on STM32F1xx platform.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[in] timespec pointer to a @p RTCTime structure
+ *
+ * @notapi
+ */
+void rtc_lld_set_time(RTCDriver *rtcp, const RTCTime *timespec) {
+ (void)rtcp;
+
+ RTC->ISR |= RTC_ISR_INIT;
+ while(!(RTC->ISR & RTC_ISR_INITF))
+ ;
+
+ RTC->TR = timespec->tv_time;
+ RTC->DR = timespec->tv_date;
+
+ /* Wait until calendar data will updated. */
+ while(!(RTC->ISR & RTC_ISR_RSF))
+ ;
+}
+
+/**
+ * @brief Get current time.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[out] timespec pointer to a @p RTCTime structure
+ *
+ * @notapi
+ */
+void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec) {
+ (void)rtcp;
+
+ /* TODO: If the frequency of the APB1 clock is less than seven times
+ * the frequency of RTCCLK, BYPSHAD must be set to ‘1’ .*/
+
+ /* Wait until calendar data will updated. */
+ while(!(RTC->ISR & RTC_ISR_RSF))
+ ;
+
+ timespec->tv_time = RTC->TR;
+ timespec->tv_date = RTC->DR;
+}
+
+/**
+ * @brief Set alarm time.
+ *
+ * @note Default value after BKP domain reset is 0xFFFFFFFF
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[in] alarm alarm identifier
+ * @param[in] alarmspec pointer to a @p RTCAlarm structure
+ *
+ * @notapi
+ */
+void rtc_lld_set_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ const RTCAlarm *alarmspec) {
+
+ (void)rtcp;
+ (void)alarm;
+ (void)alarmspec;
+}
+
+/**
+ * @brief Get current alarm.
+ * @note If an alarm has not been set then the returned alarm specification
+ * is not meaningful.
+ *
+ * @note Default value after BKP domain reset is 0xFFFFFFFF.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[in] alarm alarm identifier
+ * @param[out] alarmspec pointer to a @p RTCAlarm structure
+ *
+ * @notapi
+ */
+void rtc_lld_get_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ RTCAlarm *alarmspec) {
+
+ (void)rtcp;
+ (void)alarm;
+ (void)alarmspec;
+}
+
+/**
+ * @brief Enables or disables RTC callbacks.
+ * @details This function enables or disables callbacks, use a @p NULL pointer
+ * in order to disable a callback.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[in] callback callback function pointer or @p NULL
+ *
+ * @notapi
+ */
+void rtc_lld_set_callback(RTCDriver *rtcp, rtccb_t callback) {
+ if (callback != NULL) {
+ rtcp->rtc_cb = callback;
+ }
+ return;
+}
+
+#endif /* HAL_USE_RTC */
+
+/** @} */
diff --git a/os/hal/platforms/STM32F4xx/rtc_lld.h b/os/hal/platforms/STM32F4xx/rtc_lld.h
new file mode 100644
index 000000000..65eed6781
--- /dev/null
+++ b/os/hal/platforms/STM32F4xx/rtc_lld.h
@@ -0,0 +1,162 @@
+/*
+ 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/RTCv1/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. */
+/*===========================================================================*/
+
+/**
+ * @brief This RTC implementation supports callbacks.
+ */
+#define RTC_SUPPORTS_CALLBACKS TRUE
+
+/**
+ * @brief One alarm comparator available.
+ */
+#define RTC_ALARMS 1
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if HAL_USE_RTC && !STM32_HAS_RTC
+#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"
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Type of a structure representing an RTC alarm stamp.
+ */
+typedef struct RTCAlarm RTCAlarm;
+
+/**
+ * @brief Type of an RTC alarm.
+ */
+typedef uint32_t rtcalarm_t;
+
+/**
+ * @brief Type of an RTC event.
+ */
+typedef enum {
+ RTC_EVENT_SECOND = 0, /** Triggered every second. */
+ RTC_EVENT_ALARM = 1, /** Triggered on alarm. */
+ RTC_EVENT_OVERFLOW = 2 /** Triggered on counter overflow. */
+} rtcevent_t;
+
+/**
+ * @brief Type of a generic RTC callback.
+ */
+typedef void (*rtccb_t)(RTCDriver *rtcp, rtcevent_t event);
+
+/**
+ * @brief Structure representing an RTC time stamp.
+ */
+struct RTCTime {
+ /**
+ * @brief RTC date register in BCD format.
+ */
+ uint32_t tv_date;
+ /**
+ * @brief RTC time register in BCD format.
+ */
+ uint32_t tv_time;
+};
+
+
+
+/**
+ * @brief Structure representing an RTC alarm specification.
+ */
+struct RTCAlarm {
+ /**
+ * @brief Seconds since UNIX epoch.
+ */
+ uint32_t tv_sec;
+};
+
+/**
+ * @brief Structure representing an RTC driver.
+ */
+struct RTCDriver{
+ /**
+ * @brief Callback pointer.
+ */
+ rtccb_t rtc_cb;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if !defined(__DOXYGEN__)
+extern RTCDriver RTCD1;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void rtc_lld_init(void);
+ void rtc_lld_set_time(RTCDriver *rtcp, const RTCTime *timespec);
+ void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec);
+ void rtc_lld_set_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ const RTCAlarm *alarmspec);
+ void rtc_lld_get_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ RTCAlarm *alarmspec);
+ void rtc_lld_set_callback(RTCDriver *rtcp, rtccb_t callback);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_RTC */
+
+#endif /* _RTC_LLD_H_ */
+
+/** @} */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-17 21:46:37 +0000