积累的c51编程小模块，内附22个源代码，涉及到单片机、串口、fpga、交通灯、ad、da、按键扫瞄、液晶显示、电子钟、数据处理等。可供参考。-C51 programming accumulated a small module, containing 22 source code, related to a single chip, serial, fpga, traffic lights, ad, da, keypad scanning, LCD display, data processi