/*	定時器，可以設置小時和分鐘；	可以設置開始時間，和結束時間，在P3.7口輸出變化情況(opto=0xFF P3.7=1, opto=0x7F P3.7=0)*/#include <reg52.h>     #include <stdio.h>      unsigned  char sec100,sec,min,hour,day,month,flag1,temp,opto;unsigned char digit,buffer[4],onHour1,onMin1,offHour1,offMin1;char cputick,key,delay,count1;char keyflag, showdelay;unsigned char showsave;//char convert[10] = {0x3F,0x0c,0x76,0x5e,0x4d,0x5b,0x7b,0x0e,0x7f,0x5f};// 數碼管的編碼，需要取反輸出0-9char convert[10] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};// 各個月的天數char days[12] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};void pause(int); void scanLED();void manualOnOff();void savetimeOnOff1(); void setmin();void sethour();void setonHour();void setonMin();void setoffHour();void setoffMin();void setday();void setmonth();void showOnce();void savetimeOff1();void blinkset();void time();void timeToBuffer();void dateToBuffer();void blink();void offmsd();void keyexe();void keydelay();void comparetime();/*---------------------------------------------------------------------------*//* 定時器零的中斷服務程序 *//*---------------------------------------------------------------------------*/void timer0int (void)  interrupt 1  using 1  {	TL0 = 0;	TH0 |= 0xB8;						// reload timer 0 with 0B800H 22.1184MHZ	cputick++;	time();								// update realtime clock          }/*---------------------------------------------------------------------------*//* 主函數 *//*---------------------------------------------------------------------------*/void main(){	EA = 1;								// 允許所有中斷	ET0 = 1;							// 允許定時器0中斷 	TMOD |= 0x01;						// timer 0 run 16 bit counter 	TR0 = 1;							// run timer 0 	opto = 0xff;						// 控制P3.7的輸出 	cputick = 0;						// 每10ms加1	month = 1;							// 月的初始值	day = 1;							// 日的初始值 	hour = 18;							// 小時的初始值  	min = 0;							// 分鐘的初始值  	sec = 0;							// 秒的初始值  	key = -1;							// 首次按鍵	keyflag = 0;						// 設置鍵沒有按下  	flag1 = 0;	showsave = 0;						// 記錄閃爍多少次沒有按鍵自動恢復時間顯示  	onHour1 = 18;						// 18:01 turn lamp on  	onMin1 = 01;  	offHour1 = 18;						// 18:02 turn lamp off  	offMin1 = 02;  	count1 = 0;	buffer[0] = 0x00;  	buffer[1] = 0x00;  	buffer[2] = 0x00;  	buffer[3] = 0x00;  	while(1)  	{		while ( cputick < 1)			// 如果定時器中斷沒有執行，則顯一直	  		scanLED();				    // 掃描顯示，否則獲取時間值，再顯示		cputick = 0;		/*----------以下每10ms執行一次---------------------------------------*/    	timeToBuffer();					// 將時間值的7段碼輸入buffer中    	offmsd();						// 關閉最高位的零顯示    	blink();						// 處理秒點的閃爍, 亮50*10ms		blinkset();					    // 處理設置時的閃爍    	keyexe();						// 判斷鍵盤按鍵，執行相應動作    	keydelay();					    // 延時50*10ms后清除不可按鍵標志flag1 &= ~0x80    	comparetime();				    // 判斷是否到了開始或結束時間		/*-------------------------------------------------------------------*/  	}}/*---------------------------------------------------------------------------*//* 由中斷服務程序調用，主要是設置秒分時的變量值 *//*---------------------------------------------------------------------------*/void time (){   	sec100++;	if (sec100 >= 30)		opto |= 0x20;					// set P3.5 to beep off		if (sec100==50||sec100==100)		// 設置時的閃爍間隔	{		showdelay = 25;		flag1 |= 0x08;	}   	if (sec100 >= 100)					// 100 * 10 ms = 1 s   	{	   	sec100 = 0;		flag1 |= 0x05;					// set bit 0, bit 2    	temp = 50;    	sec++;    	if (sec >= 60)    	{			sec = 0;     		flag1 |= 0x02;				// set bit 1     		min++;     		if (min >= 60)     		{				min = 0;     			hour++;				opto &= 0xDF;               // clear bit P3.5 to beep     			if (hour >= 24)     			{					hour = 0;					day++;					if (day > days[month-1])					{						day = 1;						month++;						if (month > 12)							month = 1;					}			    }			} 		}	}}/*----------------------------------------------------------------------------*//* 掃描4個數碼管和4個按鍵, if key pressed key = 0-3 else key = -1 *//*----------------------------------------------------------------------------*/void scanLED(){	int i;	        digit = 0x08;    key = -1;    for( i = 0; i < 4; i++)				// 4-DIGIT scanning    {		P1 = ~buffer[i];				// send complement[segment]			     	P3 = ~digit & opto;				// send complement[digit]	    pause(160);						// delay a while    	P1 = 0xff;						// off LED        if ((P3 & 0x10) == 0)			// if key pressed P3.4 became low        	key = i;					// save key position to key variable        digit>>=1;						// next digit    }}/*----------------------------------------------------------------------------*//* 把時間值轉換為數碼管編碼 *//*----------------------------------------------------------------------------*/void timeToBuffer(){	if (keyflag < 3)		// 如果設置鍵按下的次數小于3，則顯示時間	{		buffer[0] = convert[min%10];	    buffer[1] = convert[min/10];	    buffer[2] = convert[hour%10];	    buffer[3] = convert[hour/10];	}	else if (keyflag < 5)	// 否則顯示日期	{		buffer[0] = convert[day%10];	    buffer[1] = convert[day/10];		buffer[2] = convert[month%10];		buffer[3] = convert[month/10];		// 屏蔽0，不顯示	    if (buffer[3] == convert[0])				    buffer[3] = 0x00;	    if (buffer[1] == convert[0])				    buffer[1] = 0x00;	}	else if (keyflag < 7)	{		buffer[0] = convert[onMin1%10];		buffer[1] = convert[onMin1/10];		buffer[2] = convert[onHour1%10];		buffer[3] = convert[onHour1/10];		}	else	{		buffer[0] = convert[offMin1%10];		buffer[1] = convert[offMin1/10];		buffer[2] = convert[offHour1%10];		buffer[3] = convert[offHour1/10];	}}/*----------------------------------------------------------------------------*//* 點亮秒針 *//*----------------------------------------------------------------------------*/void blink(){	if((flag1 & 0x04) != 0)				// check bit 2 if set decrement 										// temp until zero    {		temp--;									if (temp != 0)        {  			// 顯示日期時不顯示秒閃爍			if (keyflag < 3)			{ 				buffer[0] |= 0x80;    	    	buffer[1] |= 0x80;			}        }        else		   	flag1 &= ~0x04;	}}/*----------------------------------------------------------------------------*//* 閃爍設置位*//*----------------------------------------------------------------------------*/void blinkset(){	if((flag1 & 0x08) != 0 && key!=3) // 如果閃爍間隔到且前后兩次按鍵不一樣，就閃爍    {		showdelay--;									if (showdelay != 0)        {   			if (keyflag != 0)			{				// 如果是在小時和月份狀態				switch (keyflag)				{				case 1:				case 3:				case 5:				case 7:					buffer[3] = 0x00;			// 關閉顯示，實現閃爍					buffer[2] = 0x00;					break;								case 2:					buffer[0] = 0x80;			// 關閉顯示，實現閃爍					buffer[1] = 0x80;					break;				case 4:				case 6:				case 8:					buffer[0] = 0x00;			// 關閉顯示，實現閃爍					buffer[1] = 0x00;					break;					}			}        }        else		{		   	flag1 &= ~0x08;			if (showsave++ > 20)			   // 如果閃爍20次都沒有按鍵，自動恢復時間顯示			{				keyflag = 0;				showsave = 0;			}		}	}}/*----------------------------------------------------------------------------*//* 執行鍵盤命令 *//*----------------------------------------------------------------------------*/void keyexe(){	if (key != -1)    {    	if ((flag1 & 0x80) == 0)										// within 0.5 sec after 1st press										// the following execution is not allowed        {        	flag1 |= 0x80;            delay = 25;					      		switch(key)			{        	case (0):					// key position 0        		manualOnOff();			// service key 0				keyflag=0;        		break;        	case (1):					// key position 1        		savetimeOnOff1();		// service key 1				keyflag=0;        		break;        	case (2):					// key position 2				keyflag++;				// keyflag 1: set hour				if (keyflag>8)			//		   2: set min					keyflag=0;			//		   3: set month											//		   4: set day        		break;        	case (3):					// key position 3				showsave = 0;        		switch(keyflag)				{				case (0):					dateToBuffer();			// show date					break;				case (1):	        		sethour();							break;				case (2):					setmin();					break;				case (3):					setmonth();					break;				case (4):					setday();					break;				case (5):					setonHour();					break;				case (6):					setonMin();					break;				case (7):					setoffHour();					break;				case (8):					setoffMin();					break;				}			}		}    }}/*----------------------------------------------------------------------------*//* 顯示日期 *//*----------------------------------------------------------------------------*/void dateToBuffer(){	buffer[0] = convert[day%10];    buffer[1] = convert[day/10];	buffer[2] = convert[month%10];	buffer[3] = convert[month/10];    if (buffer[3] == convert[0])			    buffer[3] = 0x00;    if (buffer[1] == convert[0])			    buffer[1] = 0x00;	showOnce();}/*----------------------------------------------------------------------------*//* 設置小時 *//*----------------------------------------------------------------------------*/void sethour(){	hour++;    if ( hour== 24)    	hour = 0;}void setonHour(){	onHour1++;	if (onHour1 == 24)		onHour1 = 0;}void setoffHour(){	offHour1++;	if (offHour1 == 24)		offHour1 = 0;}/*----------------------------------------------------------------------------*//* 設置分鐘 *//*----------------------------------------------------------------------------*/void setmin(){    min++;    sec = 0;    if( min == 60 )    	min = 0;}void setonMin(){	onMin1++;	if (onMin1 == 60)		onMin1 = 0;}void setoffMin(){	offMin1++;	if (offMin1 == 60)		offMin1 = 0;}/*----------------------------------------------------------------------------*//* 設置日 *//*----------------------------------------------------------------------------*/void setday(){	day++;	if (day > days[month-1])		day = 1;}/*----------------------------------------------------------------------------*//* 設置月 *//*----------------------------------------------------------------------------*/void setmonth(){	month++;	if (month > 12)		month = 1;}/*----------------------------------------------------------------------------*//* 設置開始和結束時間 *//*----------------------------------------------------------------------------*/void savetimeOnOff1(){    count1++;    if (count1 == 1)    {    	onHour1 = hour;    	onMin1 = min;    	buffer[0] = 0x00;    	buffer[1] = 0x54;    	buffer[2] = 0x5C;    	buffer[3] = 0x78;				// show "on" at led    	showOnce();    }    else    {        count1 = 0;        savetimeOff1();    }}/*----------------------------------------------------------------------------*//* 保存結束時間 *//*----------------------------------------------------------------------------*/void savetimeOff1(){    offHour1 = hour;    offMin1 = min;    buffer[0] = 0x71;    buffer[1] = 0x71;    buffer[2] = 0x5C;    buffer[3] = 0x78;					// show "off" at led    showOnce();	}/*----------------------------------------------------------------------------*//* 手工點亮 on 或者 off *//*----------------------------------------------------------------------------*/void manualOnOff(){    opto= ~opto | 0x7f;					// complement bit 7 which in turn activates P3.7    if ((opto & 0x80) == 0)    {    	buffer[0] = 0;        buffer[1] = 0;        buffer[2] = 0x54;        buffer[3] = 0x5C;				// show "on"        showOnce();    }    else    {        buffer[0] = 0;        buffer[1] = 0x71;        buffer[2] = 0x71;        buffer[3] = 0x5C;				// show "off"        showOnce();    }}/*----------------------------------------------------------------------------*//* 顯示數碼值 *//*----------------------------------------------------------------------------*/void showOnce(){    int i;    for(i=0;i<400;i++)    	scanLED();}/*----------------------------------------------------------------------------*//* 鍵盤延遲 *//*----------------------------------------------------------------------------*/void keydelay(){    if ((flag1 & 0x80) !=0)    {    	delay--;        if(delay == 0)            flag1 &= ~0x80;    }}/*----------------------------------------------------------------------------*//* 比較是否到了設定的開始或結束時間, 設定opto *//*----------------------------------------------------------------------------*/void comparetime(){    if((flag1 & 0x01) != 0 )    {        flag1 &= ~0x01;    	if(hour == onHour1 && min == onMin1)            opto = 0x7f;				// clear P3.7 turning opto on    	if(hour == offHour1 && min == offMin1)            opto = 0xff;				// set bit P3.7 turning opto off    }}/*----------------------------------------------------------------------------*//* 如果小時的最高位為零，則關閉顯示零 *//*----------------------------------------------------------------------------*/void offmsd(){    if (buffer[3] == convert[0])		// if msd = '0' then put blank instead	    buffer[3] = 0x00;}/*----------------------------------------------------------------------------*//* 延遲 *//*----------------------------------------------------------------------------*/void pause(int j){	int i;   	for (i = 0; i < j; i++);}