RTC for F4x branch.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/rtc_dev@3585 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 0 insertions, 264 deletions

diff --git a/os/hal/platforms/STM32/rtc_lld.c b/os/hal/platforms/STM32/rtc_lld.c
deleted file mode 100644
index 1ddbc0903..000000000
--- a/os/hal/platforms/STM32/rtc_lld.c
+++ /dev/null
@@ -1,264 +0,0 @@
-/*

-    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 */

-

-/** @} */