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"

Go to the source code of this file.

Functions
uint8_t	BSP_SDRAM_Init (void)
	Initializes the SDRAM device. More...
uint8_t	BSP_SDRAM_DeInit (void)
	DeInitializes the SDRAM device. More...
void	BSP_SDRAM_Initialization_sequence (uint32_t RefreshCount)
	Programs the SDRAM device. 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_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...
uint8_t	BSP_SDRAM_Sendcmd (FMC_SDRAM_CommandTypeDef *SdramCmd)
	Sends command to the SDRAM bank. More...
__weak void	BSP_SDRAM_MspInit (SDRAM_HandleTypeDef *hsdram, void *Params)
	Initializes SDRAM MSP. More...
__weak void	BSP_SDRAM_MspDeInit (SDRAM_HandleTypeDef *hsdram, void *Params)
	DeInitializes SDRAM MSP. More...

Variables
SDRAM_HandleTypeDef	sdramHandle

Detailed Description

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

Author

MCD Application Team

Version

V1.0.0

Date

22-April-2016

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

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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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Definition in file stm32f769i_discovery_sdram.c.