Way with 51 MCU IO control 74 hc595 are needed drive eight digital tube (4, a total of four Yin Yang) Timer0 16 automatic reshipment is used to produce 1 ms beats, program running on the beat, the ADC key procession and scanning are mapped into a unified key code, ADC button for 1 ~ 16 key code, line scan button key code for 17 ~ 32.

ADC key procession\ADC_KEY
..................\ADC_KEY.hex
..................\ADC_KEY.lnp
..................\ADC_KEY.Opt
..................\ADC_KEY.plg
..................\ADC_KEY.Uv2
..................\ADC_KEY_Opt.Bak
..................\ADC_KEY_Uv2.Bak
..................\main.asm
ADC key procession

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