EEPW论坛

问     __asm{     //关闭中断
        MSR CPSR_c,0xdf
    }  
    PLLCON=0;      //关闭PLL
    PLLFEED=0xaa;
    PLLFEED=0x55;
    MAMCR=0;       //关闭MAM   
    
    select_sector(8,8);
    erase_sector(8,8);
    select_sector(8,8);
    ram_to_flash(0x00010000,(uint32)text,1024);
    
    PLLCON=1;
    PLLFEED=0xaa;
    PLLFEED=0x55;
    while((PLLSTAT&(1<<10))==0);
    PLLCON=3;
    PLLFEED=0xaa;
    PLLFEED=0x55;  //打开PLL
    MAMCR=2;       //打开MAM
    __asm{         //打开中断
        MSR CPSR_c,0x5f
    }

void select_sector(unsigned long start_sector,
                    unsigned long end_sector)
{
    command[0]=IAP_SELSECTOR;
    command[1]=start_sector;
    command[2]=end_sector;
    iap_entry(command,result);
}

void ram_to_flash(unsigned long flash_addr,
                  unsigned long ram_addr,
                  unsigned long count)
{
    command[0]=IAP_RAMTOFLASH;
    command[1]=flash_addr;
    command[2]=ram_addr;
    command[3]=count;
    command[4]=IAP_FCCLK;
    iap_entry(command,result);
}

/*************************************************
Function:erase_sector()
Description:擦除扇区
Input:start_sector,end_sector
Output:none
*************************************************/
void erase_sector(unsigned long start_sector,
                  unsigned long end_sector)
{
    command[0]=IAP_ERASESECTOR;
    command[1]=start_sector;
    command[2]=end_sector;
    command[3]=IAP_FCCLK;
    iap_entry(command,result);
}

尝试了很多次都没有成功，重新开机后读出来的全是FF。已经在编译器里勾选了ARM/THUMB interworking （包括汇编器、ARM C编译器、THUMB C编译器）

请不吝赐教！

答 1: 有一些进展了，但是还有不明白的地方执行ram_to_flash()后返回错误代码SRC_ADDR_ERROR，即源地址text[]没有字对齐。text[]我定义成字节数组uint8 text[1024]，改成uing32 text[1024]就可以IAP写入了。可是我不明白的是，调用函数的时候是(uint32)text，难道这样还不能字对齐吗？