现在流行的STC单片机的串口软启动下载程序，可以实现热启动下载，不要对电源一开一关下载这么麻烦了。将这程序加到你代码中就可以用-STC is now a popular microcontroller serial soft-start the download process, you can achieve the hot-start the download, not to open an off the power to download such a trouble. Add this