IAP_Bootloader测试程序，对于新手是一个不错的借鉴选择，这里是通过串口，以后方便的话，可以通过其他方式，如USB，GPRS无线等- IAP_Bootloader test procedures, for the novice is a good reference to choose, here is through the serial port, after the convenience of words, can be through other ways, such as