160 lines
4.6 KiB
C
160 lines
4.6 KiB
C
/*
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ChibiOS/HAL - Copyright (C) 2006-2014 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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Concepts and parts of this file have been contributed by Uladzimir Pylinsky
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aka barthess.
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*/
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/**
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* @file fsmc_sram.c
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* @brief SRAM Driver subsystem low level driver source.
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*
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* @addtogroup SRAM
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* @{
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*/
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#include "hal.h"
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#include "fsmc_sram.h"
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#if STM32_USE_FSMC_SRAM || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief SRAM1 driver identifier.
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*/
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#if STM32_SRAM_USE_FSMC_SRAM1 || defined(__DOXYGEN__)
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SRAMDriver SRAMD1;
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#endif
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/**
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* @brief SRAM2 driver identifier.
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*/
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#if STM32_SRAM_USE_FSMC_SRAM2 || defined(__DOXYGEN__)
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SRAMDriver SRAMD2;
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#endif
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/**
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* @brief SRAM3 driver identifier.
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*/
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#if STM32_SRAM_USE_FSMC_SRAM3 || defined(__DOXYGEN__)
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SRAMDriver SRAMD3;
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#endif
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/**
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* @brief SRAM4 driver identifier.
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*/
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#if STM32_SRAM_USE_FSMC_SRAM4 || defined(__DOXYGEN__)
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SRAMDriver SRAMD4;
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#endif
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/*===========================================================================*/
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/* Driver local types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level SRAM driver initialization.
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*
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* @notapi
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*/
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void fsmcSramInit(void) {
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fsmc_init();
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#if STM32_SRAM_USE_FSMC_SRAM1
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SRAMD1.sram = FSMCD1.sram1;
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SRAMD1.state = SRAM_STOP;
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#endif /* STM32_SRAM_USE_FSMC_SRAM1 */
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#if STM32_SRAM_USE_FSMC_SRAM2
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SRAMD2.sram = FSMCD1.sram2;
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SRAMD2.state = SRAM_STOP;
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#endif /* STM32_SRAM_USE_FSMC_SRAM2 */
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#if STM32_SRAM_USE_FSMC_SRAM3
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SRAMD3.sram = FSMCD1.sram3;
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SRAMD3.state = SRAM_STOP;
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#endif /* STM32_SRAM_USE_FSMC_SRAM3 */
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#if STM32_SRAM_USE_FSMC_SRAM4
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SRAMD4.sram = FSMCD1.sram4;
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SRAMD4.state = SRAM_STOP;
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#endif /* STM32_SRAM_USE_FSMC_SRAM4 */
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}
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/**
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* @brief Configures and activates the SRAM peripheral.
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*
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* @param[in] sramp pointer to the @p SRAMDriver object
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* @param[in] cfgp pointer to the @p SRAMConfig object
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*
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* @notapi
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*/
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void fsmcSramStart(SRAMDriver *sramp, const SRAMConfig *cfgp) {
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if (FSMCD1.state == FSMC_STOP)
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fsmc_start(&FSMCD1);
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osalDbgAssert((sramp->state == SRAM_STOP) || (sramp->state == SRAM_READY),
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"invalid state");
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if (sramp->state == SRAM_STOP) {
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sramp->sram->BCR = FSMC_BCR_WREN | FSMC_BCR_MBKEN | FSMC_BCR_MWID_0;
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sramp->sram->BTR = cfgp->btr;
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sramp->state = SRAM_READY;
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}
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}
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/**
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* @brief Deactivates the SRAM peripheral.
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*
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* @param[in] sramp pointer to the @p SRAMDriver object
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*
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* @notapi
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*/
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void fsmcSramStop(SRAMDriver *sramp) {
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if (sramp->state == SRAM_READY) {
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sramp->sram->BCR &= ~FSMC_BCR_MBKEN;
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sramp->state = SRAM_STOP;
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}
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}
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#endif /* STM32_USE_FSMC_SRAM */
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/** @} */
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