一个Atmega16的引导启动代码，自己做过一些修改，用于产品非常合适，可以通过串口进行程序升级。只要出厂前写入一次引导代码即可。-Atmega16 boot code, done some modifications, very suitable for the product through the serial port to update the program. Just before leaving the factory boot code can be write-once.