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/*
ChibiOS/HAL - Copyright (C) 2014 Uladzimir Pylinsky aka barthess
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.
*/
/**
* @file hal_fsmc_sram.c
* @brief SRAM Driver subsystem low level driver source.
*
* @addtogroup SRAM
* @{
*/
#include "hal.h"
#include "hal_fsmc_sram.h"
#if (STM32_USE_FSMC_SRAM == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/**
* @brief SRAM1 driver identifier.
*/
#if STM32_SRAM_USE_FSMC_SRAM1 || defined(__DOXYGEN__)
SRAMDriver SRAMD1;
#endif
/**
* @brief SRAM2 driver identifier.
*/
#if STM32_SRAM_USE_FSMC_SRAM2 || defined(__DOXYGEN__)
SRAMDriver SRAMD2;
#endif
/**
* @brief SRAM3 driver identifier.
*/
#if STM32_SRAM_USE_FSMC_SRAM3 || defined(__DOXYGEN__)
SRAMDriver SRAMD3;
#endif
/**
* @brief SRAM4 driver identifier.
*/
#if STM32_SRAM_USE_FSMC_SRAM4 || defined(__DOXYGEN__)
SRAMDriver SRAMD4;
#endif
/*===========================================================================*/
/* Driver local types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level SRAM driver initialization.
*
* @notapi
*/
void fsmcSramInit(void) {
fsmc_init();
#if STM32_SRAM_USE_FSMC_SRAM1
SRAMD1.sram = FSMCD1.sram1;
SRAMD1.state = SRAM_STOP;
#endif /* STM32_SRAM_USE_FSMC_SRAM1 */
#if STM32_SRAM_USE_FSMC_SRAM2
SRAMD2.sram = FSMCD1.sram2;
SRAMD2.state = SRAM_STOP;
#endif /* STM32_SRAM_USE_FSMC_SRAM2 */
#if STM32_SRAM_USE_FSMC_SRAM3
SRAMD3.sram = FSMCD1.sram3;
SRAMD3.state = SRAM_STOP;
#endif /* STM32_SRAM_USE_FSMC_SRAM3 */
#if STM32_SRAM_USE_FSMC_SRAM4
SRAMD4.sram = FSMCD1.sram4;
SRAMD4.state = SRAM_STOP;
#endif /* STM32_SRAM_USE_FSMC_SRAM4 */
}
/**
* @brief Configures and activates the SRAM peripheral.
*
* @param[in] sramp pointer to the @p SRAMDriver object
* @param[in] cfgp pointer to the @p SRAMConfig object
*
* @notapi
*/
void fsmcSramStart(SRAMDriver *sramp, const SRAMConfig *cfgp) {
if (FSMCD1.state == FSMC_STOP)
fsmc_start(&FSMCD1);
osalDbgAssert((sramp->state == SRAM_STOP) || (sramp->state == SRAM_READY),
"invalid state");
if (sramp->state == SRAM_STOP) {
sramp->sram->BTR = cfgp->btr;
sramp->sram->BWTR = cfgp->bwtr;
sramp->sram->BCR = cfgp->bcr | FSMC_BCR_MBKEN;
sramp->state = SRAM_READY;
}
}
/**
* @brief Deactivates the SRAM peripheral.
*
* @param[in] sramp pointer to the @p SRAMDriver object
*
* @notapi
*/
void fsmcSramStop(SRAMDriver *sramp) {
if (sramp->state == SRAM_READY) {
uint32_t mask = FSMC_BCR_MBKEN;
#if (defined(STM32F427xx) || defined(STM32F437xx) || \
defined(STM32F429xx) || defined(STM32F439xx) || \
defined(STM32F745xx) || defined(STM32F746xx) || \
defined(STM32F756xx) || defined(STM32F767xx) || \
defined(STM32F769xx) || defined(STM32F777xx) || \
defined(STM32F779xx))
mask |= FSMC_BCR_CCLKEN;
#endif
sramp->sram->BCR &= ~mask;
sramp->state = SRAM_STOP;
}
}
#endif /* STM32_USE_FSMC_SRAM */
/** @} */
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