program.c

ST ARM STR7系列在应用编程示例.采用串口下载.可供参考

/******************** (C) COPYRIGHT 2004 STMicroelectronics ********************
* File Name          : program.c
* Author             : MCD Application Team
* Date First Issued  : 10/25/2004
* Description        : This file provides a software which allows to program
*                      the internal FLASH
********************************************************************************
* History:
*  10/25/2004 : Created
*  11/24/2004 : IAP Version 1.0
********************************************************************************
THE PRESENT SOFTWARE 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
SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN
IN CONNECTION WITH THEIR PRODUCTS.
********************************************************************************/

#include "common.h"

extern const u32 FLASH_Blk_Off[];

/*******************************************************************************
* Function Name  : ProgramInternalFlash
* Description    : Program internal Flash
* Input 1        : Address of internal Flash
* Input 2        : Size of data to be programmed in byte
* Input 3        : A pointer to the data
* Return         :  0  -- Success
*                : -1  -- Block Erase Failed
*                : -2  -- Flash Program Failed
*                : -3  -- Data Verification Failed
*******************************************************************************/
static s32 ProgramInternalFlash (u32 FlashAddr, u32 SizeInByte, u32 *pBuf)
{
  u32 LastOff,FirstOff, FirstBlk, LastBlk, CurrBlk, *pFlashPtr, *pRamPtr, ByteCounter;
  /* calculate the start offset into internal flash */
  FirstOff = FlashAddr - (u32)INT_FLASH_BASE;
  /* check the data size */
  if ((SizeInByte % 4) != 0)
  {
    SizeInByte += (4-(SizeInByte % 4));
  }
  /* calculate the end offset into internal flash */
  LastOff = FirstOff + SizeInByte-1;
  /* calculate the sector number where the program starts */
  for (FirstBlk=0; FirstBlk<INT_FLASH_SECNUM-1; FirstBlk++)
  {
    if (FirstOff < FLASH_Blk_Off[FirstBlk+1])
    {
      break;
    }
  }
  /* calculate the sector number where the program ends */
  for (LastBlk=FirstBlk; LastBlk<INT_FLASH_SECNUM-1; LastBlk++)
  {
    if (LastOff < FLASH_Blk_Off[LastBlk+1])
    {
      break;
    }
  }
  /* Disable the write protection for the two banks */
  FLASH_WritePrConfig(FLASH_B0|FLASH_B1,DISABLE);
  /* Erase sectors */
  SerialPutString("Erasing Sectors...");
  for (CurrBlk=FirstBlk; CurrBlk<=LastBlk; CurrBlk++)
  {
    FLASH_SectorErase(IntFlashSectorMask(CurrBlk));
  }
  SerialPutString("OK\r\n");
  /* Program data */
  if (IntFlashProgram(FirstOff, SizeInByte, pBuf) != 0)
  {
    return -2;
  }
  /* Verify data */
  SerialPutString("Verifying...");
  pFlashPtr = (u32 *)FlashAddr;
  pRamPtr = (u32 *)pBuf;
  for (ByteCounter=0; ByteCounter<SizeInByte; ByteCounter=ByteCounter+4)
  {
    if (*pFlashPtr++ != *pRamPtr++)
    {
      return -3;
    }
  }
  SerialPutString("OK\r\n");
  return 0;
}

/*******************************************************************************
* Function Name  : ProgramIntFlash
* Description    : Program internal Flash and display the status of the operation
* Input          : None
* Return         : None
*******************************************************************************/
void ProgramIntFlash(void)
{
  s32 destflashaddr=0x40002000, srcramaddr=0x20002000, errorno = 0;
  if (gimagesize == 0)
  {
    errorno = 2;
    goto out;
  }
  //Now programming
  if (errorno == 0)
  {
    errorno = ProgramInternalFlash(destflashaddr, gimagesize, (u32*)srcramaddr);
  }
out:	
  gimagesize = 0;//reset gimagesize
  //Message output
  switch (errorno)
  {
    case 0:
      SerialPutString("Successfully completed!\r\n");
      break;
    case 1:	
      SerialPutString("Invalid Command Arguments!\r\n");
      break;
    case 2:
      SerialPutString("No File to be Programmed!\r\n");
      break;
    case -1:
      SerialPutString("Erase Failed!\r\n");
      break;
    case -2:
      SerialPutString("Flash Program Failed!\r\n");
      break;
    case -3:
      SerialPutString("Data Verification Failed!\r\n");
      break;
    default:
      SerialPutString("Unkown failure!\r\n");
      break;
  }
}
/*******************(C)COPYRIGHT 2004 STMicroelectronics *****END OF FILE****/