stm32h743i_eval_sdram.c File Reference

This file includes the SDRAM driver for the IS42S32800G memory device mounted on STM32H743I-EVAL evaluation boards. More...

#include "stm32h743i_eval_sdram.h"

Go to the source code of this file.

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

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Detailed Description

This file includes the SDRAM driver for the IS42S32800G memory device mounted on STM32H743I-EVAL evaluation boards.

Author:

MCD Application Team

Version:

V1.0.0

Date:

21-April-2017

  How To use this driver:
  -----------------------
   - This driver is used to drive the IS42S32800G SDRAM external memory mounted
     on STM32H743I-EVAL evaluation 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 MDMA transfer using the functions
       BSP_SDRAM_ReadData_DMA()/BSP_SDRAM_WriteData_DMA().
     o The AHB access is performed with 32-bit width transaction, the MDMA 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 MDMA transfer, the function BSP_SDRAM_MDMA_IRQHandler()
       is called in IRQ handler file, to serve the generated interrupt once the MDMA
       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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Definition in file stm32h743i_eval_sdram.c.