包括大学时期C语言课程设计所用到的程序代码，C51单片机的键盘及液晶显示模块的调试，以及电子大赛中用到的电子秤压力串口的调试、电子秤测试，还包含几个7455模块的测试程序。-Including C language curriculum design college used by the program code, C51 MCU keyboard and LCD module debugging, as well as electronic contest used electronic s