stm32_eval_spi_flash.c

STM32的SPI1与SPI2通信

/**
  ******************************************************************************
  * @file    stm32_eval_spi_flash.c
  * @author  MCD Application Team
  * @version V4.5.0
  * @date    07-March-2011
  * @brief   This file provides a set of functions needed to manage the SPI M25Pxxx
  *          FLASH memory mounted on STM32xx-EVAL board (refer to stm32_eval.h
  *          to know about the boards supporting this memory). 
  *          It implements a high level communication layer for read and write 
  *          from/to this memory. The needed STM32 hardware resources (SPI and 
  *          GPIO) are defined in stm32xx_eval.h file, and the initialization is 
  *          performed in sFLASH_LowLevel_Init() function declared in stm32xx_eval.c 
  *          file.
  *          You can easily tailor this driver to any other development board, 
  *          by just adapting the defines for hardware resources and 
  *          sFLASH_LowLevel_Init() function.
  *            
  *          +-----------------------------------------------------------+
  *          |                     Pin assignment                        |
  *          +-----------------------------+---------------+-------------+
  *          |  STM32 SPI Pins             |     sFLASH    |    Pin      |
  *          +-----------------------------+---------------+-------------+
  *          | sFLASH_CS_PIN               | ChipSelect(/S)|    1        |
  *          | sFLASH_SPI_MISO_PIN / MISO  |   DataOut(Q)  |    2        |
  *          |                             |   VCC         |    3 (3.3 V)|
  *          |                             |   GND         |    4 (0 V)  |
  *          | sFLASH_SPI_MOSI_PIN / MOSI  |   DataIn(D)   |    5        |
  *          | sFLASH_SPI_SCK_PIN / SCLK   |   Clock(C)    |    6        |
  *          |                             |    VCC        |    7 (3.3 V)|
  *          |                             |    VCC        |    8 (3.3 V)|  
  *          +-----------------------------+---------------+-------------+  
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************  
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32_eval_spi_flash.h"

/** @addtogroup Utilities
  * @{
  */
  
/** @addtogroup STM32_EVAL
  * @{
  */ 

/** @addtogroup Common
  * @{
  */
  
/** @addtogroup STM32_EVAL_SPI_FLASH
  * @brief      This file includes the M25Pxxx SPI FLASH driver of STM32-EVAL boards.
  * @{
  */  

/** @defgroup STM32_EVAL_SPI_FLASH_Private_Types
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM32_EVAL_SPI_FLASH_Private_Defines
  * @{
  */  
/**
  * @}
  */ 

/** @defgroup STM32_EVAL_SPI_FLASH_Private_Macros
  * @{
  */
/**
  * @}
  */ 
  

/** @defgroup STM32_EVAL_SPI_FLASH_Private_Variables
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM32_EVAL_SPI_FLASH_Private_Function_Prototypes
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM32_EVAL_SPI_FLASH_Private_Functions
  * @{
  */ 

/**
  * @brief  DeInitializes the peripherals used by the SPI FLASH driver.
  * @param  None
  * @retval None
  */
void sFLASH_DeInit(void)
{
  sFLASH_LowLevel_DeInit();
}

/**
  * @brief  Initializes the peripherals used by the SPI FLASH driver.
  * @param  None
  * @retval None
  */
void sFLASH_Init(void)
{
  SPI_InitTypeDef  SPI_InitStructure;

  sFLASH_LowLevel_Init();
    
  /*!< Deselect the FLASH: Chip Select high */
  sFLASH_CS_HIGH();

  /*!< SPI configuration */
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
#if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
#else
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
#endif

  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(sFLASH_SPI, &SPI_InitStructure);

  /*!< Enable the sFLASH_SPI  */
  SPI_Cmd(sFLASH_SPI, ENABLE);
}

/**
  * @brief  Erases the specified FLASH sector.
  * @param  SectorAddr: address of the sector to erase.
  * @retval None
  */
void sFLASH_EraseSector(uint32_t SectorAddr)
{
  /*!< Send write enable instruction */
  sFLASH_WriteEnable();

  /*!< Sector Erase */
  /*!< Select the FLASH: Chip Select low */
  sFLASH_CS_LOW();
  /*!< Send Sector Erase instruction */
  sFLASH_SendByte(sFLASH_CMD_SE);
  /*!< Send SectorAddr high nibble address byte */
  sFLASH_SendByte((SectorAddr & 0xFF0000) >> 16);
  /*!< Send SectorAddr medium nibble address byte */
  sFLASH_SendByte((SectorAddr & 0xFF00) >> 8);
  /*!< Send SectorAddr low nibble address byte */
  sFLASH_SendByte(SectorAddr & 0xFF);
  /*!< Deselect the FLASH: Chip Select high */
  sFLASH_CS_HIGH();

  /*!< Wait the end of Flash writing */
  sFLASH_WaitForWriteEnd();
}

/**
  * @brief  Erases the entire FLASH.
  * @param  None
  * @retval None
  */
void sFLASH_EraseBulk(void)
{
  /*!< Send write enable instruction */
  sFLASH_WriteEnable();

  /*!< Bulk Erase */
  /*!< Select the FLASH: Chip Select low */
  sFLASH_CS_LOW();
  /*!< Send Bulk Erase instruction  */
  sFLASH_SendByte(sFLASH_CMD_BE);
  /*!< Deselect the FLASH: Chip Select high */
  sFLASH_CS_HIGH();

  /*!< Wait the end of Flash writing */
  sFLASH_WaitForWriteEnd();
}

/**
  * @brief  Writes more than one byte to the FLASH with a single WRITE cycle 
  *         (Page WRITE sequence).
  * @note   The number of byte can't exceed the FLASH page size.
  * @param  pBuffer: pointer to the buffer  containing the data to be written
  *         to the FLASH.
  * @param  WriteAddr: FLASH's internal address to write to.
  * @param  NumByteToWrite: number of bytes to write to the FLASH, must be equal
  *         or less than "sFLASH_PAGESIZE" value.
  * @retval None
  */
void sFLASH_WritePage(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite)
{
  /*!< Enable the write access to the FLASH */
  sFLASH_WriteEnable();

  /*!< Select the FLASH: Chip Select low */
  sFLASH_CS_LOW();
  /*!< Send "Write to Memory " instruction */
  sFLASH_SendByte(sFLASH_CMD_WRITE);
  /*!< Send WriteAddr high nibble address byte to write to */
  sFLASH_SendByte((WriteAddr & 0xFF0000) >> 16);
  /*!< Send WriteAddr medium nibble address byte to write to */
  sFLASH_SendByte((WriteAddr & 0xFF00) >> 8);
  /*!< Send WriteAddr low nibble address byte to write to */
  sFLASH_SendByte(WriteAddr & 0xFF);

  /*!< while there is data to be written on the FLASH */
  while (NumByteToWrite--)
  {
    /*!< Send the current byte */
    sFLASH_SendByte(*pBuffer);
    /*!< Point on the next byte to be written */
    pBuffer++;
  }

  /*!< Deselect the FLASH: Chip Select high */
  sFLASH_CS_HIGH();

  /*!< Wait the end of Flash writing */
  sFLASH_WaitForWriteEnd();
}

/**
  * @brief  Writes block of data to the FLASH. In this function, the number of
  *         WRITE cycles are reduced, using Page WRITE sequence.
  * @param  pBuffer: pointer to the buffer  containing the data to be written
  *         to the FLASH.
  * @param  WriteAddr: FLASH's internal address to write to.
  * @param  NumByteToWrite: number of bytes to write to the FLASH.
  * @retval None
  */
void sFLASH_WriteBuffer(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite)
{
  uint8_t NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0, temp = 0;

  Addr = WriteAddr % sFLASH_SPI_PAGESIZE;
  count = sFLASH_SPI_PAGESIZE - Addr;
  NumOfPage =  NumByteToWrite / sFLASH_SPI_PAGESIZE;
  NumOfSingle = NumByteToWrite % sFLASH_SPI_PAGESIZE;

  if (Addr == 0) /*!< WriteAddr is sFLASH_PAGESIZE aligned  */
  {
    if (NumOfPage == 0) /*!< NumByteToWrite < sFLASH_PAGESIZE */
    {
      sFLASH_WritePage(pBuffer, WriteAddr, NumByteToWrite);
    }