Sunplus Single-chip 4* 4 keyboard to expand the source code and the principle of the circuit (PDF format), including the keyboard scan initialization, keyboard scanning service function, as well as the keyboard防抖动process.

4×4keyboard
............\4×4键盘模块.pdf
............\Key16
............\.....\Device.env
............\.....\hardware.asm
............\.....\hardware.h
............\.....\hardware.inc
............\.....\irq.asm
............\.....\irq.inc
............\.....\key.asm
............\.....\Key16.env
............\.....\Key16.h
............\.....\Key16.lik
............\.....\Key16.opt
............\.....\Key16.rc
............\.....\Key16.set
............\.....\Key16.spj
............\.....\main.c
............\.....\Makefile
............\.....\Resource.asm
............\.....\Resource.inc

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