The seven procedures are my 51 series single-chip applications developed, including the keyboard to read, time settings, LCD display, GM8123, 8125 the use of and parallel printer to use and so on, all procedures are in KeilC through debugging environment.

gm8123.c
GM8125工作在单通道模式下的源程序.c
lcd.c
printer.c
串口发送.c
显示时间设置.c
键盘及显示各功能模块.c

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