key.h

采用四端法测试欧姆电阻

#ifndef _KEY_H_
#define _KEY_H_



#ifdef  _KEY_C_
#define EXT_KEY
#else
#define EXT_KEY extern
#endif




#define MacroConst_KeyIntervalTimer		10	//delay 100ms to kill jitt,100=BaseTimeStick*10;





//keyboard.
sbit SW1 = P3^7;  
sbit SW2 = P3^6;
sbit SW3 = P0^2;
sbit SW4 = P0^3;
            

// define flag indicate the state of keys!
// when key1 has been pressed, set  vKeyPressedFlag.Key1 = 1;
EXT_KEY xdata unsigned char vKeyPressedFlag;
EXT_KEY xdata unsigned char vKeyBouncedFlag;
EXT_KEY xdata unsigned char vKeyLastStateFlag;
EXT_KEY xdata unsigned char vKeyEnterFlag;

#define Key1  BIT1
#define Key2  BIT2
#define Key3  BIT3
#define Key4  BIT4



EXT_KEY unsigned int uiSW1PressedTimerCounter;
EXT_KEY unsigned int uiSW2PressedTimerCounter;
EXT_KEY unsigned int uiSW3PressedTimerCounter;
EXT_KEY unsigned int uiSW4PressedTimerCounter;

EXT_KEY unsigned int uiSW1BounceTimerCounter;
EXT_KEY unsigned int uiSW2BounceTimerCounter;
EXT_KEY unsigned int uiSW3BounceTimerCounter;
EXT_KEY unsigned int uiSW4BounceTimerCounter;









EXT_KEY void fScanKeyPort(void);
EXT_KEY void fKeyEnter(void);






#endif