STM32F4 串口IAP程序解析

void Jump2APP(uint32_t appxaddr)
{
    /* Test if user code is programmed starting from address "APPLICATION_ADDRESS" */
    if (((*(__IO uint32_t*)appxaddr) & 0x2FFE0000 ) == 0x20000000)    //1.检查栈顶地址是否合法
    {
        /* Jump to user application */
        JumpAddress = *(__IO uint32_t*) (FLASH_APP_ADDR + 4);    //2.用户代码区第二个字为程序开始地址（复位地址）
        
        Jump_To_Application = (pFunction) JumpAddress;
        /* Initialize user application‘s Stack Pointer */
        __set_MSP(*(__IO uint32_t*) FLASH_APP_ADDR);    //设置进程MSR堆栈首地址
        Jump_To_Application();　　//设置PC指针指向复位地址，完成跳转
    }
}