iap.c

来自「一个机器人开发的相关嵌入式开发源码」· C语言 代码 · 共 278 行

/******************************************************************************
 *
 * Copyright:
 *    (C) 2005 Embedded Artists AB
 *
 * File:
 *    iap.c
 *
 * Description:
 *    Code that implements the iap interface.
 *
 *****************************************************************************/

/******************************************************************************
 * Includes
 *****************************************************************************/
#include "general.h"
#include <lpc2xxx.h>
#include "startup/config.h"
#include "iap.h"

/******************************************************************************
 * Defines and typedefs
 *****************************************************************************/
#define CRYSTAL_FREQUENCY FOSC

#define m_IAP_ENTRY(a, b) ((void (*)(tU32[], tU32[]))(0x7ffffff1))(a, b)


/*****************************************************************************
 * Local function prototypes
 ****************************************************************************/
static void iapCommand(tU32 *pCommand, tU32 *pResult);


/*****************************************************************************
 * Implementation of local functions
 ****************************************************************************/

/*****************************************************************************
 *
 * Description:
 *    Performs the actual IAP command, based on input command stored in
 *    'pCommand'. The PLL, MAM, and VIC are disabled during the command
 *    and restored afterwards.
 *    This code must run in THUMB mode, since the IAP interface assumes this!
 *    
 * Params:
 *    [in]    pCommand - pointer to command vector (up to five tU32 words)
 *    [inout] pResult  - pointer to where the result can be stored
 *
 ****************************************************************************/
static void
iapCommand(tU32 *pCommand, tU32 *pResult)
{
  //perform IAP command
  m_IAP_ENTRY(pCommand, pResult);
}

/*****************************************************************************
 * Implementation of public functions
 ****************************************************************************/

/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Select Sector, which prepares the sectors for
 *    write operations.
 *    
 * Params:
 *    [in]    sector1 - start sector
 *    [in]    sector2 - end sector (must be equal or larger to sector1)
 *
 * Returns:
 *    IAP status code (see list in iap.h)
 *
 ****************************************************************************/
tU32
iapSelectSector(tU8 sector1, tU8 sector2)
{
    tU32 parameter[3];
    tU32 result[1];
    
    parameter[0] = IAP_SELSECTOR;
    parameter[1] = sector1;
    parameter[2] = sector2;
    iapCommand(parameter, result);
    
    return result[0];
}


/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Copy RAM to FLASH
 *    
 * Params:
 *    [in] destAddress - desitnation address within the FLASH memory
 *                       Must be on 256 byte boundary.
 *    [in] srcAddress  - address to RAM data block (word boundary needed).
 *    [in] length      - length of data block (256, 512, 1024 or 4096)
 *
 * Returns:
 *    IAP status code (see list in iap.h)
 *
 ****************************************************************************/
tU32
iapRamToFlash(tU32 destAddress, tU32 srcAddress, tU32 length)
{
    tU32 parameter[5];
    tU32 result[1];
    
    parameter[0] = IAP_RAMTOFLASH;
    parameter[1] = destAddress;
    parameter[2] = srcAddress;
    parameter[3] = length;
    parameter[4] = CRYSTAL_FREQUENCY / 1000;
    iapCommand(parameter, result);
    
    return result[0];
}


/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Erase Sector
 *    
 * Params:
 *    [in] sector1 - start sector
 *    [in] sector2 - end sector (must be equal or larger to sector1)
 *
 * Returns:
 *    IAP status code (see list in iap.h)
 *
 ****************************************************************************/
tU32
iapEraseSector(tU8 sector1, tU8 sector2)
{
    tU32 parameter[4];
    tU32 result[1];
    
    parameter[0] = IAP_ERASESECTOR;
    parameter[1] = sector1;
    parameter[2] = sector2;
    parameter[3] = CRYSTAL_FREQUENCY / 1000;
    iapCommand(parameter, result);
    
    return result[0];
}


/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Blank Check Sectors
 *    
 * Params:
 *    [in] sector1 - start sector
 *    [in] sector2 - end sector (must be equal or larger to sector1)
 *
 * Returns:
 *    IAP status code (see list in iap.h)
 *
 ****************************************************************************/
tU32
iapBlankCheck(tU8 sector1, tU8 sector2)
{
    tU32 parameter[3];
    tU32 result[1];
    
    parameter[0] = IAP_BLANKCHK;
    parameter[1] = sector1;
    parameter[2] = sector2;
    iapCommand(parameter, result);
    
    return result[0];
}


/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Read Part ID
 *    
 * Returns:
 *    The Part ID, or 0 (if command failed)
 *
 ****************************************************************************/
tU32
iapReadPartID(void)
{
    tU32 parameter[1];
    tU32 result[2];
    
    parameter[0] = IAP_READPARTID;
    iapCommand(parameter, result);
    
    if (result[0] == IAP_CMD_SUCCESS)
      return result[1];
    else
      return 0;
}


/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Read Boot Version
 *    
 * Returns:
 *    The boot code version, or 0 (if command failed)
 *
 ****************************************************************************/
tU32
iapReadBootVer(void)
{
    tU32 parameter[1];
    tU32 result[2];
    
    parameter[0] = IAP_BOOTCODEID;
    iapCommand(parameter, result);
    
    if (result[0] == IAP_CMD_SUCCESS)
      return result[1];
    else
      return 0;
}


/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Compare
 *    
 * Params:
 *    [in] destAddress - desitnation address within the FLASH memory
 *                       Must be on word boundary.
 *    [in] srcAddress  - address to RAM data block (word boundary needed).
 *    [in] length      - length of data block (must be a multiple of 4)
 *
 * Returns:
 *    IAP status code (see list in iap.h)
 *
 ****************************************************************************/
tU32
iapCompare(tU32 destAddress, tU32 srcAddress, tU32 length)
{
    tU32 parameter[4];
    tU32 result[1];
    
    parameter[0] = IAP_COMPARE;
    parameter[1] = destAddress;
    parameter[2] = srcAddress;
    parameter[3] = length;
    iapCommand(parameter, result);
    
    return result[0];
}


/*****************************************************************************
 *
 * Description:
 *    Performs the IAP command: Reinvoke ISP
 *    
 ****************************************************************************/
void
iapReinvokeIsp(void)
{
    tU32 parameter[1];
    tU32 result[1];
    
    parameter[0] = IAP_REINVOKE_ISP;
    iapCommand(parameter, result);
}