spi_flash.c

基于STM32F107的UDP服务器程序

/******************** (C) COPYRIGHT 2010 www.armjishu.com ********************
* File Name          : spi_flash.c
* Author             : www.armjishu.com
* Version            : V1.0
* Library            : Using STM32F10X_STDPERIPH_VERSION V3.3.0
* Date               : 10/16/2010
* Description        : This file provides a set of functions needed to manage the
*                      communication between SPI peripheral and SPI W25X16 FLASH.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "spi_flash.h"
#include <stdio.h>

#define SPI_FLASH_SPI                     SPI1
#define SPI_FLASH_SPI_CLK                 RCC_APB2Periph_SPI1
#define SPI_FLASH_SPI_SCK_PIN             GPIO_Pin_5              /* PA.05 */
#define SPI_FLASH_SPI_SCK_GPIO_PORT       GPIOA                   /* GPIOA */
#define SPI_FLASH_SPI_SCK_GPIO_CLK        RCC_APB2Periph_GPIOA
#define SPI_FLASH_SPI_MISO_PIN            GPIO_Pin_6              /* PA.06 */
#define SPI_FLASH_SPI_MISO_GPIO_PORT      GPIOA                   /* GPIOA */
#define SPI_FLASH_SPI_MISO_GPIO_CLK       RCC_APB2Periph_GPIOA
#define SPI_FLASH_SPI_MOSI_PIN            GPIO_Pin_7              /* PA.07 */
#define SPI_FLASH_SPI_MOSI_GPIO_PORT      GPIOA                   /* GPIOA */
#define SPI_FLASH_SPI_MOSI_GPIO_CLK       RCC_APB2Periph_GPIOA
#define SPI_FLASH_CS_PIN                  GPIO_Pin_9              /* PB.09 */
#define SPI_FLASH_CS_GPIO_PORT            GPIOB                   /* GPIOB */
#define SPI_FLASH_CS_GPIO_CLK             RCC_APB2Periph_GPIOB

//#define SD_CS_PIN                         GPIO_Pin_11             /* PD.11 */
//#define SD_CS_GPIO_PORT                   GPIOD                   /* GPIOD */
//#define SD_CS_GPIO_CLK                    RCC_APB2Periph_GPIOD

/* Private typedef -----------------------------------------------------------*/
//#define SPI_FLASH_PageSize      4096
#define SPI_FLASH_PageSize      256
#define SPI_FLASH_PerWritePageSize      256

/* Private define ------------------------------------------------------------*/
#define W25X_WriteEnable		0x06 
#define W25X_WriteDisable		0x04 
#define W25X_ReadStatusReg		0x05 
#define W25X_WriteStatusReg		0x01 
#define W25X_ReadData			0x03 
#define W25X_FastReadData		0x0B 
#define W25X_FastReadDual		0x3B 
#define W25X_PageProgram		0x02 
#define W25X_BlockErase			0xD8 
#define W25X_SectorErase		0x20 
#define W25X_ChipErase			0xC7 
#define W25X_PowerDown			0xB9 
#define W25X_ReleasePowerDown	0xAB 
#define W25X_DeviceID			0xAB 
#define W25X_ManufactDeviceID	0x90 
#define W25X_JedecDeviceID		0x9F 

#define WIP_Flag                0x01  /* Write In Progress (WIP) flag */

#define Dummy_Byte              0xA5

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : SPI_FLASH_Init
* Description    : Initializes the peripherals used by the SPI FLASH driver.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_FLASH_Init(void)
{
  SPI_InitTypeDef  SPI_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Disable SD CS  */
//  GPIO_InitStructure.GPIO_Pin = SD_CS_PIN;
//  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
//  GPIO_Init(SD_CS_GPIO_PORT, &GPIO_InitStructure);
//  GPIO_SetBits(SD_CS_GPIO_PORT, SD_CS_PIN);
  
  /* Enable SPI1 and GPIO clocks */
  /*!< SPI_FLASH_SPI_CS_GPIO, SPI_FLASH_SPI_MOSI_GPIO, 
       SPI_FLASH_SPI_MISO_GPIO, SPI_FLASH_SPI_DETECT_GPIO 
       and SPI_FLASH_SPI_SCK_GPIO Periph clock enable */
  RCC_APB2PeriphClockCmd(SPI_FLASH_CS_GPIO_CLK | SPI_FLASH_SPI_MOSI_GPIO_CLK |
                         SPI_FLASH_SPI_MISO_GPIO_CLK | SPI_FLASH_SPI_SCK_GPIO_CLK, 
                          ENABLE);

  /*!< SPI_FLASH_SPI Periph clock enable */
  RCC_APB2PeriphClockCmd(SPI_FLASH_SPI_CLK, ENABLE);
  /*!< AFIO Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  /*!< Remap SPI3 Pins */
  //GPIO_PinRemapConfig(GPIO_Remap_SPI3,ENABLE);  
  
  /*!< Configure SPI_FLASH_SPI pins: SCK */
  GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_SCK_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(SPI_FLASH_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SPI_FLASH_SPI pins: MISO */
  GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_MISO_PIN;
  GPIO_Init(SPI_FLASH_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SPI_FLASH_SPI pins: MOSI */
  GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_MOSI_PIN;
  GPIO_Init(SPI_FLASH_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SPI_FLASH_SPI_CS_PIN pin: SPI_FLASH Card CS pin */
  GPIO_InitStructure.GPIO_Pin = SPI_FLASH_CS_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(SPI_FLASH_CS_GPIO_PORT, &GPIO_InitStructure);

  /* Deselect the FLASH: Chip Select high */
  SPI_FLASH_CS_HIGH();

  /* SPI1 configuration */
  // W25X16: data input on the DIO pin is sampled on the rising edge of the CLK. 
  // Data on the DO and DIO pins are clocked out on the falling edge of CLK.
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //8位数据帧
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;  //数据传输从高位开始
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(SPI1, &SPI_InitStructure);

  /* Enable SPI1  */
  SPI_Cmd(SPI1, ENABLE);
}

/*******************************************************************************
* Function Name  : SPI_FLASH_SectorErase
* Description    : Erases the specified FLASH sector.
* Input          : SectorAddr: address of the sector to erase.
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_FLASH_SectorErase(u32 SectorAddr)
{
  /* Send write enable instruction */
  SPI_FLASH_WriteEnable();

  /* Sector Erase */
  /* Select the FLASH: Chip Select low */
  SPI_FLASH_CS_LOW();
  /* Send Sector Erase instruction */
  SPI_FLASH_SendByte(W25X_SectorErase);
  /* Send SectorAddr high nibble address byte */
  SPI_FLASH_SendByte((SectorAddr & 0xFF0000) >> 16);
  /* Send SectorAddr medium nibble address byte */
  SPI_FLASH_SendByte((SectorAddr & 0xFF00) >> 8);
  /* Send SectorAddr low nibble address byte */
  SPI_FLASH_SendByte(SectorAddr & 0xFF);
  /* Deselect the FLASH: Chip Select high */
  SPI_FLASH_CS_HIGH();

  /* Wait the end of Flash writing */
  SPI_FLASH_WaitForWriteEnd();
}

/*******************************************************************************
* Function Name  : SPI_FLASH_BulkErase
* Description    : Erases the entire FLASH.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_FLASH_BulkErase(void)
{
  /* Send write enable instruction */
  SPI_FLASH_WriteEnable();

  /* Bulk Erase */
  /* Select the FLASH: Chip Select low */
  SPI_FLASH_CS_LOW();
  /* Send Bulk Erase instruction  */
  SPI_FLASH_SendByte(W25X_ChipErase);
  /* Deselect the FLASH: Chip Select high */
  SPI_FLASH_CS_HIGH();

  /* Wait the end of Flash writing */
  SPI_FLASH_WaitForWriteEnd();
}

/*******************************************************************************
* Function Name  : SPI_FLASH_PageWrite
* Description    : Writes more than one byte to the FLASH with a single WRITE
*                  cycle(Page WRITE sequence). The number of byte can't exceed
*                  the FLASH page size.
* Input          : - pBuffer : pointer to the buffer  containing the data to be
*                    written to the FLASH.
*                  - WriteAddr : FLASH's internal address to write to.
*                  - NumByteToWrite : number of bytes to write to the FLASH,
*                    must be equal or less than "SPI_FLASH_PageSize" value.
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_FLASH_PageWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite)
{
  /* Enable the write access to the FLASH */
  SPI_FLASH_WriteEnable();

  /* Select the FLASH: Chip Select low */
  SPI_FLASH_CS_LOW();
  /* Send "Write to Memory " instruction */
  SPI_FLASH_SendByte(W25X_PageProgram);
  /* Send WriteAddr high nibble address byte to write to */
  SPI_FLASH_SendByte((WriteAddr & 0xFF0000) >> 16);
  /* Send WriteAddr medium nibble address byte to write to */
  SPI_FLASH_SendByte((WriteAddr & 0xFF00) >> 8);
  /* Send WriteAddr low nibble address byte to write to */
  SPI_FLASH_SendByte(WriteAddr & 0xFF);

  if(NumByteToWrite > SPI_FLASH_PerWritePageSize)
  {
     NumByteToWrite = SPI_FLASH_PerWritePageSize;
     printf("\n\r Err: SPI_FLASH_PageWrite too large!");
  }

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

  /* Deselect the FLASH: Chip Select high */
  SPI_FLASH_CS_HIGH();

  /* Wait the end of Flash writing */
  SPI_FLASH_WaitForWriteEnd();
}

/*******************************************************************************
* Function Name  : SPI_FLASH_BufferWrite
* Description    : Writes block of data to the FLASH. In this function, the
*                  number of WRITE cycles are reduced, using Page WRITE sequence.
* Input          : - pBuffer : pointer to the buffer  containing the data to be
*                    written to the FLASH.
*                  - WriteAddr : FLASH's internal address to write to.
*                  - NumByteToWrite : number of bytes to write to the FLASH.
* Output         : None
* Return         : None
*******************************************************************************/
void SPI_FLASH_BufferWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite)
{
  u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0, temp = 0;

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

  if (Addr == 0) /* WriteAddr is SPI_FLASH_PageSize aligned  */
  {
    if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */
    {
      SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);
    }
    else /* NumByteToWrite > SPI_FLASH_PageSize */
    {
      while (NumOfPage--)
      {
        SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);
        WriteAddr +=  SPI_FLASH_PageSize;
        pBuffer += SPI_FLASH_PageSize;
      }

      SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);
    }
  }
  else /* WriteAddr is not SPI_FLASH_PageSize aligned  */
  {
    if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */
    {
      if (NumOfSingle > count) /* (NumByteToWrite + WriteAddr) > SPI_FLASH_PageSize */
      {
        temp = NumOfSingle - count;

        SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);
        WriteAddr +=  count;
        pBuffer += count;

        SPI_FLASH_PageWrite(pBuffer, WriteAddr, temp);
      }
      else
      {