STM8S005 IAP问题，已经毫无头绪，请大佬们不理赐教

yonnhor

最近在做STM8S005的IAP功能，当前遇到的问题是这样的，问题一：
当我用同一个FW进行IAP时（即MCU中的FW与IAP的FW是相同的），可以正常完成IAP，并可以重新开机运行；
当修改了FW后，在IAP中途就会MCU无响应了，即失败。

问题二：
当FLASH代码中加入以下这两行代码时，一运行到这里就无法继续运行下去了，擦除也无法执行。
FLASH_CR2 |= (1 << FLASH_CR2_PRG);
FLASH_NCR2 &= (INT8U)(~(1 << FLASH_NCR2_NPRG));



贴上代码：


#pragma section (FLASH_CODE)
INT8U sFlashBlockErase(INT16U ulBlockAddr)
{
    INT8U status = FLASH_BUSY;

    FLASH_PUKR = 0x56;
    FLASH_PUKR = 0xAE;
    while (!(FLASH_IAPSR & (1 << FLASH_IAPSR_PUL)));

yonnhor

#pragma section (FLASH_CODE)

INT8U sFlashBlockErase(INT16U ulBlockAddr)
{
    INT8U status = FLASH_BUSY;
    INT32U dwTimeOutCnt = 0xFFFFF;
   
   FLASH_PUKR = 0x56;
    FLASH_PUKR = 0xAE;
    while (!(FLASH_IAPSR & (1 << FLASH_IAPSR_PUL)));

        FLASH_CR2 |= (1 << FLASH_CR2_ERASE);
    FLASH_NCR2 &= (INT8U)(~(1 << FLASH_NCR2_NERASE));
   
    *((volatile INT8U*)ulBlockAddr) = 0x00;
    while (!(FLASH_IAPSR & (1 << FLASH_IAPSR_EOP)));
        status = FLASH_COMPLETE;
   FLASH_IAPSR &= (INT8U)(~(1 << FLASH_IAPSR_PUL));
   
    return status;
}

INT8U   sFlashDataWrite(INT16U wAddress,INT8U length,INT8U *pData)
{
    INT8U i;
    INT8U status = FLASH_BUSY;


        FLASH_PUKR = 0x56;
    FLASH_PUKR = 0xAE;
    while (!(FLASH_IAPSR & (1 << FLASH_IAPSR_PUL)));

    FLASH_CR2 |= (1 << FLASH_CR2_PRG);
    FLASH_NCR2 &= (INT8U)(~(1 << FLASH_NCR2_NPRG));
    for (i=0; i<length; i++)
    {
        *((volatile INT8U*)(wAddress+i)) = pData[i];
        while (!(FLASH_IAPSR & (1 << FLASH_IAPSR_EOP)))；
    }
   
    FLASH_IAPSR &= (INT8U)(~(1 << FLASH_IAPSR_PUL));
    status = FLASH_COMPLETE;
   
    return status;
}

#pragma section ()