keyaltdefs.h

一个按件扫描程序

//************************************************
//* Matrix keyboard decoder
//* Alternation key definitions
//*
//* Filename:	keyaltdefs.h
//* Version:	1.0
//*
//* Device:		ATmega162
//* Clock:		Internal 8.000 MHz RC oscillator
//*
//************************************************
#ifndef KEYALTDEFS_H
#define KEYALTDEFS_H



#define ALTLOCKMASK 0xF0						// Bitmask for lock-key flags



/*** Alternation key codes ***/
#define ALTKEY0  3								// 'A' on test keypad
#define ALTKEY1 11								// 'B' on test keypad
#define ALTKEY2 19								// 'C' on test keypad
#define ALTKEY3 0xFF							// 0xFF is non-existing code and therefore unused
#define LCKKEY0 27								// 'D' on test keypad
#define LCKKEY1 0xFF
#define LCKKEY2 0xFF



#endif