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/*
ChibiOS - Copyright (C) 2006..2017 Giovanni Di Sirio
Copyright (C) 2017 Fabien Poussin (fabien.poussin (at) google's mail)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in sdramliance 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_sdram.c
* @brief SDRAM Driver code.
*
* @addtogroup SDRAM
* @{
*/
#include "hal.h"
#if HAL_USE_SDRAM || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
#include "hal_sdram_lld.h"
/**
* @brief SDRAM Driver initialization.
* @note This function is implicitly invoked by @p halInit(), there is
* no need to explicitly initialize the driver.
*
* @init
*/
void sdramInit(void) {
fsmcInit();
sdramObjectInit(&SDRAMD1);
}
/**
* @brief Initializes the standard part of a @p SDRAMDriver structure.
*
* @param[out] sdramp pointer to the @p SDRAMDriver object
*
* @init
*/
void sdramObjectInit(SDRAMDriver *sdramp) {
sdramp->sdram = FSMCD1.sdram;
sdramp->state = SDRAM_STOP;
}
/**
* @brief Configures and activates the SDRAM peripheral.
*
* @param[in] sdramp pointer to the @p SDRAMDriver object
* @param[in] config pointer to the @p SDRAMConfig object
*
* @api
*/
void sdramStart(SDRAMDriver *sdramp, const SDRAMConfig *config) {
osalDbgCheck((sdramp != NULL) && (config != NULL));
if (FSMCD1.state == FSMC_STOP)
fsmcStart(&FSMCD1);
osalSysLock();
osalDbgAssert((sdramp->state == SDRAM_STOP) || (sdramp->state == SDRAM_READY),
"invalid state");
sdram_lld_start(sdramp, config);
sdramp->state = SDRAM_READY;
osalSysUnlock();
}
/**
* @brief Deactivates the SDRAM peripheral.
*
* @param[in] sdramp pointer to the @p SDRAMDriver object
*
* @api
*/
void sdramStop(SDRAMDriver *sdramp) {
osalDbgCheck(sdramp != NULL);
osalSysLock();
osalDbgAssert((sdramp->state == SDRAM_STOP) || (sdramp->state == SDRAM_READY),
"invalid state");
sdram_lld_stop(sdramp);
sdramp->state = SDRAM_STOP;
osalSysUnlock();
}
#endif /* HAL_USE_SDRAM */
/** @} */
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