hglgl

正是我需要的，好文章

WorlfT1987

得好好研究研究，缺的知识真不少

oayzw

bookmark

xian123

拜读了，很详细，用心的在写

chenweigang

楼主，你的堆栈初始化在哪里啊？类似STM32的   __MSR_MSP(*(vu32*) ApplicationAddress);

zhaojun_xf

这个忘了加入中断向量重映射，你在IAP里边添加就可以了。

tonyli

你好，我使用 LPC1754 做 IAP 下载，发现程序进入不了 IAP 服务程序 。这是什么原因啊？

zhaojun_xf

什么意思？能说明白点吗？

tonyli

就是在使用IAP函数的时候，程序走到 iap_entry(command, result);这里，就会莫名其妙的死掉。贴上源程序，请帮忙看看。
#include "IAP.h"

#define IAP_CLK  48000

#define IAP_LOCATION 0x1FFF1FF1
#define iap_entry(a, b)     ((void (*)())(IAP_LOCATION))(a, b)

unsigned long command[5] = {0,0,0,0,0};
unsigned long result[3]= {0,0,0};

/*************************************************************************
* Function Name: IAP_PrepareSec
* Parameters:         unsigned long StartSecNum -- Start Sector Number
*                                 unsigned long EndSecNum -- End Sector Number
* Return: unsigned long -- Status Code
*
* Description: This command must be executed before executing "Copy RAM to Flash" or
*                        "Erase Sector(s)" command.
*
*************************************************************************/
unsigned long IAP_PrepareSec (unsigned long StartSecNum,  unsigned long EndSecNum)
{
        if (EndSecNum < StartSecNum)
                return IAP_STA_INVALD_PARAM;

        command[0] = IAP_CMD_PrepareSec;
        command[1] = StartSecNum;
        command[2] = EndSecNum;
        iap_entry(command, result);

        return result[0];
}

/*************************************************************************
* Function Name: IAP_CopyRAMToFlash
* Parameters:         unsigned long dst -- Destination Flash address, should be a 256 byte boundary.
*                                 unsigned long src -- Source RAM address, should be a word boundary
*                                unsigned long number -- 256 | 512 |1024 |4096                       
* Return: unsigned long -- Status Code
*
* Description: This command is used to program the flash memory.
*
*************************************************************************/
unsigned long IAP_CopyRAMToFlash (unsigned long dst,  unsigned long src,
        unsigned long number)
{
        command[0] = IAP_CMD_CopyRAMToFlash;
        command[1] = dst;
        command[2] = src;
        command[3] = number;
        command[4] = IAP_CLK / 1000;        // Fcclk in KHz
        iap_entry(command, result);

        return result[0];
}


/*************************************************************************
* Function Name: IAP_EraseSec
* Parameters:         unsigned long StartSecNum -- Start Sector Number
*                                 unsigned long EndSecNum -- End Sector Number
* Return: unsigned long -- Status Code
*
* Description: This command is used to erase a sector or multiple sectors of on-chip Flash
*                         memory.
*
*************************************************************************/
unsigned long IAP_EraseSec (unsigned long StartSecNum,  unsigned long EndSecNum)
{
        if (EndSecNum < StartSecNum)
                return IAP_STA_INVALD_PARAM;

        command[0] = IAP_CMD_EraseSec;
        command[1] = StartSecNum;
        command[2] = EndSecNum;
        command[3] = IAP_CLK / 1000;
        iap_entry(command, result);

        return result[0];
}

/*************************************************************************
* Function Name: IAP_BlankChkSec
* Parameters:         unsigned long StartSecNum -- Start Sector Number
*                                 unsigned long EndSecNum -- End Sector Number
* Return: unsigned long -- Status Code
*
* Description: This command is used to blank check a sector or mutilple sectors of on-chip
*                          Flash memory.
*
*************************************************************************/
unsigned long IAP_BlankChkSec (unsigned long StartSecNum,  unsigned long EndSecNum,
                                        unsigned long * pResult)
{
        if (EndSecNum < StartSecNum)
                return IAP_STA_INVALD_PARAM;

        command[0] = IAP_CMD_BlankChkSec;
        command[1] = StartSecNum;
        command[2] = EndSecNum;

        iap_entry(command, result);

        if (result[0] == IAP_STA_SECTOR_NOT_BLANK)
        {
                *pResult = result[0];
                *(pResult+1) = result[1];
        }

        return result[0];
}

/*************************************************************************
* Function Name: IAP_ReadParID
* Parameters:         unsigned long * PartID
* Return: unsigned long -- Status Code
*
* Description: This command is used to read the part identification number.
*
*************************************************************************/
unsigned long IAP_ReadParID (unsigned long * PartID)
{

        command[0] = IAP_CMD_ReadParID;
        iap_entry(command, result);
        *PartID = result[1];

        return result[0];
}

/*************************************************************************
* Function Name: IAP_ReadBootVer
* Parameters:         char * MajorVer
*                                char * MinorVer
* Return: unsigned long -- Status Code
*
* Description: This command is used to read the boot code version number.
*
*************************************************************************/
unsigned long IAP_ReadBootVer (unsigned long * MajorVer, unsigned long * MinorVer)
{
        command[0] = IAP_CMD_ReadBootVer;
        iap_entry(command, result);
        *MajorVer = (result[1] & 0xff00)>>8;
        *MinorVer = result[1] & 0xff;

        return result[0];
}

/*************************************************************************
* Function Name: IAP_Compare
* Parameters:         unsigned long dst -- Destination Flash address
*                                 unsigned long src -- Source RAM address
*                                unsigned long number -- Should be in mutilple of 4               
* Return: unsigned long -- Status Code
*
* Description: This command is used to compary the memory contents at two locations.
*
* NOTE:        Compary result may not be correct when source or destination address contains
*                any of the first 64 bytes starting from address zero. First 64 bytes can be re-mapped
*                to RAM.
*
*************************************************************************/
unsigned long IAP_Compare (unsigned long dst,  unsigned long src,
        unsigned long number, unsigned long *offset)
{
        command[0] = IAP_CMD_Compare;
        command[1] = dst;
        command[2] = src;
        command[3] = number;
        iap_entry(command, result);

        if (result[0] == IAP_STA_COMPARE_ERROR)
                *offset = result[1];

        return result[0];
}

zhaojun_xf

时钟频率对吗：

#define IAP_FCCLK                        (25000)                           // 频率(单位：KHz)
#define IAP_ENTER_ADR                    (0x1FFF1FF1)          // IAP入口地址定义

tonyli

你好，这个现在已经解决了，现在就是又碰到一个新问题，我使用的是串口IAP，现在文件发送完后，跳不进用户程序，来时卡死在
  _asm void JMP_Boot( uint32_t address ){
   LDR SP, [R0]                ;Load new stack pointer address
   LDR PC, [R0, #4]        ;Load new program counter address
}
这里。真是很奇怪？

zhaojun_xf

重映射没有？？？？？？？

minyuanxiani

楼主，我现在用的是LPC11C24，和LPC1114差不多的，现在IAP+APP方式，APP地址在0x2000处开始，现在我可以跳转到0x2000处开始运行，之后APP感觉没运行起来，因为我在APP开始出通过串口打印，但是没有开到打印信息。是怎么回事啊，现在弄头大了

semonpic

楼主跳到应用程序的那段代码是有问题的，楼主可以重新跟踪下跳转后指令的执行状况。你会发现，指令从用户空间起始位置开始执行了一些无效代码，然后才非常巧合的，走到了，复位函数里面。这是很危险的做法，正确的应该是这样来做
                                 pFunction=(PFUNCTION)(*((unsigned long *)(APPADDRESS+4)));
                                 (* pFunction)();

LAOLIU1968

liuzhemin12

感谢楼主

Heguoyao

liuzhemin12 发表于 2015-8-14 09:39
感谢楼主

你弄好了吗