stm32f7xx_hal_sram.c File Reference

SRAM HAL module driver. This file provides a generic firmware to drive SRAM memories mounted as external device. More...

#include "stm32f7xx_hal.h"

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Detailed Description

SRAM HAL module driver. This file provides a generic firmware to drive SRAM memories mounted as external device.

Author

MCD Application Team

Version

V1.1.0

Date

22-April-2016

==============================================================================
                        ##### How to use this driver #####
==============================================================================  
[..]
  This driver is a generic layered driver which contains a set of APIs used to 
  control SRAM memories. It uses the FMC layer functions to interface 
  with SRAM devices.  
  The following sequence should be followed to configure the FMC to interface
  with SRAM/PSRAM memories: 
    
 (#) Declare a SRAM_HandleTypeDef handle structure, for example:
        SRAM_HandleTypeDef  hsram; and: 
        
     (++) Fill the SRAM_HandleTypeDef handle "Init" field with the allowed 
          values of the structure member.
          
     (++) Fill the SRAM_HandleTypeDef handle "Instance" field with a predefined 
          base register instance for NOR or SRAM device 
                       
     (++) Fill the SRAM_HandleTypeDef handle "Extended" field with a predefined
          base register instance for NOR or SRAM extended mode 
           
 (#) Declare two FMC_NORSRAM_TimingTypeDef structures, for both normal and extended 
     mode timings; for example:
        FMC_NORSRAM_TimingTypeDef  Timing and FMC_NORSRAM_TimingTypeDef  ExTiming;
    and fill its fields with the allowed values of the structure member.
    
 (#) Initialize the SRAM Controller by calling the function HAL_SRAM_Init(). This function
     performs the following sequence:
        
     (##) MSP hardware layer configuration using the function HAL_SRAM_MspInit()
     (##) Control register configuration using the FMC NORSRAM interface function 
          FMC_NORSRAM_Init()
     (##) Timing register configuration using the FMC NORSRAM interface function 
          FMC_NORSRAM_Timing_Init()
     (##) Extended mode Timing register configuration using the FMC NORSRAM interface function 
          FMC_NORSRAM_Extended_Timing_Init()
     (##) Enable the SRAM device using the macro __FMC_NORSRAM_ENABLE()    

 (#) At this stage you can perform read/write accesses from/to the memory connected 
     to the NOR/SRAM Bank. You can perform either polling or DMA transfer using the
     following APIs:
     (++) HAL_SRAM_Read()/HAL_SRAM_Write() for polling read/write access
     (++) HAL_SRAM_Read_DMA()/HAL_SRAM_Write_DMA() for DMA read/write transfer
     
 (#) You can also control the SRAM device by calling the control APIs HAL_SRAM_WriteOperation_Enable()/
     HAL_SRAM_WriteOperation_Disable() to respectively enable/disable the SRAM write operation  
     
 (#) You can continuously monitor the SRAM device HAL state by calling the function
     HAL_SRAM_GetState()              

Attention

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Definition in file stm32f7xx_hal_sram.c.