key.h

这是52单片机串口调试程序

BYTE code Key_index[]={
	'A', 'B', 'C', 'D',
	'3', '6', '9', '#',
	'2', '5', '8', '0',
	'1', '4', '7', '*'};

sbit	KEY_COL_1	=	P1^0;					// * 0 # D
sbit	KEY_COL_2	=	P1^1;					// 7 8 9 C
sbit	KEY_COL_3	=	P1^2;					// 4 5 6 B
sbit	KEY_COL_4	=	P1^3;					// 1 2 3 A

#define	KEY_ROW_1	0x10
#define	KEY_ROW_2	0x20
#define	KEY_ROW_3	0x40
#define	KEY_ROW_4	0x80

void Read_key(void)
{
	EA=0;
	OUT_373_1
	EA=1;
	if(KEY_COL_1==0)
		Pre_key=1;
	else if(KEY_COL_2==0)
		Pre_key=2;
	else if(KEY_COL_3==0)
		Pre_key=3;
	else if(KEY_COL_4==0)
		Pre_key=4;
	else
		Pre_key=0;
}

void Timer1_interrupt(void) interrupt TF1_VECTOR
{
	TH1=TIMER1_COUNT;
	if(IDCardTime)
		IDCardTime--;
	if(Timer_20ms)
		Timer_20ms--;
	if(Timer_20ms2)
		Timer_20ms2--;
	if(Pause_time){
		Pause_time--;
	}
	if(BELL_counter){
		BELL_counter--;
		if(BELL_counter==0){
			b_BELL=0;
			BELL_OFF
		}
	}
	if(AUX_counter){
		AUX_counter--;
		if(AUX_counter==0){
			AUX_OUT_OFF
		}
	}
	if(VOC_counter){
		VOC_counter--;
		if(VOC_counter==0){
			EA=0;
			D373_3|=VOC_PLAY_MASK;			// VOC_PLAY=1
			OUT_373_3
			EA=1;
		}
	}
	if(VOC_delay_counter){
		VOC_delay_counter--;
		if(VOC_delay_counter==0){
			EA=0;
			P0=VOC_buf[0];  B_373_2=1;  B_373_2=0;  VOC_counter=VOC_buf[1];
			D373_3&=~VOC_PLAY_MASK;			// VOC_PLAY=0
			OUT_373_3
			EA=1;
		}
	}
	if(Key==0){									// no key wait for process
		D373_1|=0xF0;
		D373_1&=(~KEY_ROW_1);				// Row_1 = 0
		Read_key();
		if(Pre_key==0){						// no key press
			D373_1|=0xF0;
			D373_1&=(~KEY_ROW_2);			// Row_2 = 0
			Read_key();
			if(Pre_key==0){					// no key press
				D373_1|=0xF0;
				D373_1&=(~KEY_ROW_3);		// Row_3 = 0
				Read_key();
				if(Pre_key==0){				// no key press
					D373_1|=0xF0;
					D373_1&=(~KEY_ROW_4);	// Row_4 = 0
					Read_key();
					if(Pre_key!=0)
						Pre_key+=12;
				}else
					Pre_key+=8;
			}else
				Pre_key+=4;
		}											// Now Pre_key=keyboard current status(0-16)
		if(Pre_key==0){						// no key press
			Key_stat=0;
		}
		if(Key_stat==0){						// no key pressed or wait for process
			if(Pre_key!=0){
				Last_key=Pre_key;				// Save key in Pre_key
				Key_stat=1;
				if(b_BELL==0){					// BELL is current off
					BELL_ON						// BELL on
					BELL_counter=10;
				}
			}
		}else if(Key_stat==1){				// key pressed, wait 20ms read again
			if(Pre_key==Last_key){			// key in has no change
				Key=Last_key;
				Key_stat=2;
			}
		}
	}else{										// Last key is waiting for process
		EA=0;
		D373_1&=0xF;							// Row_1234 = 0
		OUT_373_1
		EA=1;
		if((KEY_COL_1&KEY_COL_2&KEY_COL_3&KEY_COL_4)==1){	// All key released
			if(Key_stat==3){
				Key_stat=0;
				Key=0;
			}
		}
	}
}

void Key_Process(BYTE k)
{
	BYTE i,j;
	if(Menu_stat==0){							// Normal process mode
		if((b_Serial_mode==RS232_MODE)&&(!b_Send_busy)){
			Send_buf[3]=20;  Send_buf[4]=~20;
			Send_buf[5]=k;
			for(i=6; i<22; i++)
				Send_buf[i]=0;
			Send_Data();
		}
		if((k>='0')&&(k<='9')&&(Key_p<6)){	// Number input
			Key_buf[Key_p]=k;
			Key_p++;
			if(Key_p==6){						// Password length
				Set_28F040_Page(1);
				for(i=0; i<6; i++){
					j=Flash[0x2401+i];		// Password stored here
					if((j>='0')&&(j<='9')&&(j!=Key_buf[i]))
						goto Key_exit;
				}
				Menu_stat=1;					// Main menu
				Show_mainmenu();
				Key_exit:{}
			}
		}else{
			Key_p=0;
			if(k=='*'){
				Sys_Stat=SB;
				LCD_ShowStatus();
				newVOC_Play(4);
			}else if(k=='#'){
				Sys_Stat=XB;
				LCD_ShowStatus();
				newVOC_Play(6);
			}else if(k=='A'){
				Sys_Stat=JBS;
				LCD_ShowStatus();
				newVOC_Play(8);
			}else if(k=='B'){
				Sys_Stat=JBX;
				LCD_ShowStatus();
				newVOC_Play(10);
			}else if(k=='D'){
				Sys_Stat=LSJ;
				LCD_ShowStatus();
				newVOC_Play(12);
			}else{	// 'C':
				Sys_Stat=LSC;
				LCD_ShowStatus();
				newVOC_Play(14);
			}
		}
	}else{										// Main Menu working mode
		switch(k){
			case 'C':							// ESC
				Menu_stat=0;
				LCD_clrscr();
				Sys_Stat=SB;
				LCD_ShowStatus();
				b_20ms2=0;
				return;
			case '1':							// Add user
				Menu_stat=2;
				Menu_adduser();
				break;
			case '2':							// Change time
				Menu_stat=3;
				Menu_settime();
				break;
			case '3':							// Serial setup
				Menu_stat=4;
				Menu_serial();
				break;
			case '4':							// Delete user
				Menu_stat=5;
				Menu_deluser();
				break;
		}
	}
}