scankey.h

74L164的键盘的扫描程序大家评价一下吧

#ifndef	_ScanKey_h
#define	_ScanKey_h

void system_time_20ms (void) ;									//T0 Init
void Scan_Key_CLK_Init (void);									//Ready to Scan_Key	
unsigned char Scan_Key (void);									//
unsigned char Key_Press (unsigned char KeyState);				//Key State
#endif