STM32756G_EVAL BSP User Manual: stm32756g_eval_sdram.c File Reference

This file includes the SDRAM driver for the MT48LC4M32B2B5-7 memory device mounted on STM32756G-EVAL and STM32746G-EVAL evaluation boards.

Author:

MCD Application Team

Version:

V1.0.0

Date:

22-May-2015

  How To use this driver:
  -----------------------
   - This driver is used to drive the MT48LC4M32B2B5-7 SDRAM external memory mounted
     on STM32756G-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 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. 
  

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Definition in file stm32756g_eval_sdram.c.