stm32f769i_discovery_sdram.c File Reference

This file includes the SDRAM driver for the MT48LC4M32B2B5-6A memory device mounted on STM32F769I-DISCOVERY boards. More...

#include "stm32f769i_discovery_sdram.h"

Include dependency graph for stm32f769i_discovery_sdram.c:

Go to the source code of this file.

Functions
uint8_t	BSP_SDRAM_DeInit (void)
	DeInitializes the SDRAM device. More...
uint8_t	BSP_SDRAM_Init (void)
	Initializes the SDRAM device. More...
void	BSP_SDRAM_Initialization_sequence (uint32_t RefreshCount)
	Programs the SDRAM device. More...
__weak void	BSP_SDRAM_MspDeInit (SDRAM_HandleTypeDef *hsdram, void *Params)
	DeInitializes SDRAM MSP. More...
__weak void	BSP_SDRAM_MspInit (SDRAM_HandleTypeDef *hsdram, void *Params)
	Initializes SDRAM MSP. More...
uint8_t	BSP_SDRAM_ReadData (uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
	Reads an amount of data from the SDRAM memory in polling mode. More...
uint8_t	BSP_SDRAM_ReadData_DMA (uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
	Reads an amount of data from the SDRAM memory in DMA mode. More...
uint8_t	BSP_SDRAM_Sendcmd (FMC_SDRAM_CommandTypeDef *SdramCmd)
	Sends command to the SDRAM bank. More...
uint8_t	BSP_SDRAM_WriteData (uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
	Writes an amount of data to the SDRAM memory in polling mode. More...
uint8_t	BSP_SDRAM_WriteData_DMA (uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
	Writes an amount of data to the SDRAM memory in DMA mode. More...

Variables
static FMC_SDRAM_CommandTypeDef	Command
SDRAM_HandleTypeDef	sdramHandle
static FMC_SDRAM_TimingTypeDef	Timing

Detailed Description

This file includes the SDRAM driver for the MT48LC4M32B2B5-6A memory device mounted on STM32F769I-DISCOVERY boards.

Author

MCD Application Team

How To use this driver:
-----------------------
 - This driver is used to drive the MT48LC4M32B2B5-6A SDRAM external memory mounted
   on STM32F769I-DISCOVERY board.
 - This driver does not need a specific component driver for the SDRAM device
   to be included with.

Driver description:
------------------
+ Initialization steps:
   o Initialize the SDRAM external memory using the BSP_SDRAM_Init() function. This 
     function includes the MSP layer hardware resources initialization and the
     FMC controller configuration to interface with the external SDRAM memory.
   o It contains the SDRAM initialization sequence to program the SDRAM external 
     device using the function BSP_SDRAM_Initialization_sequence(). Note that this 
     sequence is standard for all SDRAM devices, but can include some differences
     from a device to another. If it is the case, the right sequence should be 
     implemented separately.

+ SDRAM read/write operations
   o SDRAM external memory can be accessed with read/write operations once it is
     initialized.
     Read/write operation can be performed with AHB access using the functions
     BSP_SDRAM_ReadData()/BSP_SDRAM_WriteData(), or by DMA transfer using the functions
     BSP_SDRAM_ReadData_DMA()/BSP_SDRAM_WriteData_DMA().
   o The AHB access is performed with 32-bit width transaction, the DMA transfer
     configuration is fixed at single (no burst) word transfer (see the 
     SDRAM_MspInit() static function).
   o User can implement his own functions for read/write access with his desired 
     configurations.
   o If interrupt mode is used for DMA transfer, the function BSP_SDRAM_DMA_IRQHandler()
     is called in IRQ handler file, to serve the generated interrupt once the DMA 
     transfer is complete.
   o You can send a command to the SDRAM device in runtime using the function 
     BSP_SDRAM_Sendcmd(), and giving the desired command as parameter chosen between 
     the predefined commands of the "FMC_SDRAM_CommandTypeDef" structure. 

Attention

© COPYRIGHT(c) 2016 STMicroelectronics

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Definition in file stm32f769i_discovery_sdram.c.