diff options
Diffstat (limited to 'os/hal/platforms/STM32/RTCv1/rtc_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32/RTCv1/rtc_lld.c | 329 |
1 files changed, 0 insertions, 329 deletions
diff --git a/os/hal/platforms/STM32/RTCv1/rtc_lld.c b/os/hal/platforms/STM32/RTCv1/rtc_lld.c deleted file mode 100644 index 108d94fb6..000000000 --- a/os/hal/platforms/STM32/RTCv1/rtc_lld.c +++ /dev/null @@ -1,329 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-/*
- Concepts and parts of this file have been contributed by Uladzimir Pylinsky
- aka barthess.
- */
-
-/**
- * @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 local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/**
- * @brief RTC driver identifier.
- */
-RTCDriver RTCD1;
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief Wait for synchronization of RTC registers with APB1 bus.
- * @details This function must be invoked before trying to read RTC registers
- * in the backup domain: DIV, CNT, ALR. CR registers can always
- * be read.
- *
- * @notapi
- */
-#define rtc_lld_apb1_sync() {while ((RTC->CRL & RTC_CRL_RSF) == 0);}
-
-/**
- * @brief Wait for for previous write operation complete.
- * @details This function must be invoked before writing to any RTC registers
- *
- * @notapi
- */
-#define rtc_lld_wait_write() {while ((RTC->CRL & RTC_CRL_RTOFF) == 0);}
-
-/**
- * @brief Acquires write access to RTC registers.
- * @details Before writing to the backup domain RTC registers the previous
- * write operation must be completed. Use this function before
- * writing to PRL, CNT, ALR registers.
- *
- * @notapi
- */
-#define rtc_lld_acquire() {rtc_lld_wait_write(); RTC->CRL |= RTC_CRL_CNF;}
-
-/**
- * @brief Releases write access to RTC registers.
- *
- * @notapi
- */
-#define rtc_lld_release() {RTC->CRL &= ~RTC_CRL_CNF;}
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/**
- * @brief RTC interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(RTC_IRQHandler) {
- uint16_t flags;
-
- CH_IRQ_PROLOGUE();
-
- /* This wait works only when AHB1 bus was previously powered off by any
- reason (standby, reset, etc). In other cases it does nothing.*/
- rtc_lld_apb1_sync();
-
- /* Mask of all enabled and pending sources.*/
- flags = RTC->CRH & RTC->CRL;
- RTC->CRL &= ~(RTC_CRL_SECF | RTC_CRL_ALRF | RTC_CRL_OWF);
-
- if (flags & RTC_CRL_SECF)
- RTCD1.callback(&RTCD1, RTC_EVENT_SECOND);
-
- if (flags & RTC_CRL_ALRF)
- RTCD1.callback(&RTCD1, RTC_EVENT_ALARM);
-
- if (flags & RTC_CRL_OWF)
- RTCD1.callback(&RTCD1, RTC_EVENT_OVERFLOW);
-
- CH_IRQ_EPILOGUE();
-}
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Load value of RTCCLK to prescaler registers.
- * @note The pre-scaler must not be set on every reset as RTC clock
- * counts are lost when it is set.
- * @note This function designed to be called from
- * hal_lld_backup_domain_init(). Because there is only place
- * where possible to detect BKP domain reset event reliably.
- *
- * @notapi
- */
-void rtc_lld_set_prescaler(void){
- rtc_lld_acquire();
- RTC->PRLH = (uint16_t)((STM32_RTCCLK - 1) >> 16) & 0x000F;
- RTC->PRLL = (uint16_t)(((STM32_RTCCLK - 1)) & 0xFFFF);
- rtc_lld_release();
-}
-
-/**
- * @brief Initialize RTC.
- *
- * @notapi
- */
-void rtc_lld_init(void){
-
- /* RSF bit must be cleared by software after an APB1 reset or an APB1 clock
- stop. Otherwise its value will not be actual. */
- RTC->CRL &= ~RTC_CRL_RSF;
-
- /* Required because access to PRL.*/
- rtc_lld_apb1_sync();
-
- /* All interrupts initially disabled.*/
- rtc_lld_wait_write();
- RTC->CRH = 0;
-
- /* Callback initially disabled.*/
- RTCD1.callback = NULL;
-
- /* IRQ vector permanently assigned to this driver.*/
- nvicEnableVector(RTC_IRQn, CORTEX_PRIORITY_MASK(STM32_RTC_IRQ_PRIORITY));
-}
-
-/**
- * @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_lld_acquire();
- RTC->CNTH = (uint16_t)(timespec->tv_sec >> 16);
- RTC->CNTL = (uint16_t)(timespec->tv_sec & 0xFFFF);
- rtc_lld_release();
-}
-
-/**
- * @brief Get current time.
- *
- * @param[in] rtcp pointer to RTC driver structure
- * @param[in] timespec pointer to a @p RTCTime structure
- *
- * @notapi
- */
-void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec) {
- (void)rtcp;
-
- uint32_t time_frac;
-
- /* Required because access to CNT and DIV.*/
- rtc_lld_apb1_sync();
-
- /* Loops until two consecutive read returning the same value.*/
- 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));
-
- timespec->tv_msec = (uint16_t)(((STM32_RTCCLK - 1 - time_frac) * 1000) /
- STM32_RTCCLK);
-}
-
-/**
- * @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;
-
- rtc_lld_acquire();
- if (alarmspec != NULL) {
- RTC->ALRH = (uint16_t)(alarmspec->tv_sec >> 16);
- RTC->ALRL = (uint16_t)(alarmspec->tv_sec & 0xFFFF);
- }
- else {
- RTC->ALRH = 0;
- RTC->ALRL = 0;
- }
- rtc_lld_release();
-}
-
-/**
- * @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;
-
- /* Required because access to ALR.*/
- rtc_lld_apb1_sync();
-
- alarmspec->tv_sec = ((RTC->ALRH << 16) + RTC->ALRL);
-}
-
-/**
- * @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) {
-
- /* IRQ sources enabled only after setting up the callback.*/
- rtcp->callback = callback;
-
- rtc_lld_wait_write();
- RTC->CRL &= ~(RTC_CRL_OWF | RTC_CRL_ALRF | RTC_CRL_SECF);
- RTC->CRH = RTC_CRH_OWIE | RTC_CRH_ALRIE | RTC_CRH_SECIE;
- }
- else {
- rtc_lld_wait_write();
- RTC->CRH = 0;
-
- /* Callback set to NULL only after disabling the IRQ sources.*/
- rtcp->callback = NULL;
- }
-}
-
-#include "chrtclib.h"
-
-/**
- * @brief Get current time in format suitable for usage in FatFS.
- *
- * @param[in] rtcp pointer to RTC driver structure
- * @return FAT time value.
- *
- * @api
- */
-uint32_t rtc_lld_get_time_fat(RTCDriver *rtcp) {
- uint32_t fattime;
- struct tm timp;
-
- rtcGetTimeTm(rtcp, &timp);
-
- fattime = (timp.tm_sec) >> 1;
- fattime |= (timp.tm_min) << 5;
- fattime |= (timp.tm_hour) << 11;
- fattime |= (timp.tm_mday) << 16;
- fattime |= (timp.tm_mon + 1) << 21;
- fattime |= (timp.tm_year - 80) << 25;
-
- return fattime;
-}
-#endif /* HAL_USE_RTC */
-
-/** @} */
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