LY-51开发板配套源代码150个，很好的例子，我都练习过了，对学习单片机有很大帮助，特此推荐给想学习单片机的朋友。-LY-51 development board support source code 150, a good example, I have practiced, and very helpful for learning microcontrollers, hereby recommend to friends want to learn microcontroller.