8279做的時(shí)鐘程序C語言源代碼

???? #include
???? #include
???? #define????? Z8279??? XBYTE[0x8FFF] //定義外部命令口
???? #define????? D8279??? XBYTE[0x8FFE] //定義外部數(shù)據(jù)口
???? #define????? LEDWR0?? 0x90??? //寫端口命令
#define uchar unsigned char
???
???? void view8279(void);
uchar?? hour1=0,hour2=0,min1=0,min2=0,sec1=0,sec2=0,num_20; //時(shí)分秒的十位和個(gè)位，初值為零
???? uchar led[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};//定義0到F的鍵碼
???
???? void main(void)
???? {
????? TMOD=0x01;
????? TH0=0x3c;
????? TL0=0xb0;
????? IE=0x82;
????? TR0=1;
????? num_20=20;
????? while(1)
????? {}
???? }
???
???? void shizhong(void) interrupt 1
???? {????????? //7?????????????????
????? TH0=0x3c;
????? TL0=0xb0;
????? num_20--;
????? if(num_20!=0) return;
????
????? if(sec1==5 && sec2==9)
????? {????????? //05
??? sec1=0;
??? sec2=0;
?????? if(min1==5 && min2==9)
?????? {???????? //03
???? min1=0;
???? min2=0;
??????? if(hour1==5 && hour2==9)
??????? {??????? //01
???????? hour1=0;
???????? hour2=0;
???? }??????? //01
???????? else if(hour2==9)
???????? {?????? //02
????????? hour1++;
????????? hour2=0;
???????? }?????? //02
???????? else hour2++;
??????? }??????? //03
??????? else if(min2==9)
??????? {??????? //04
???????? min1++;
???????? min2=0;
??????? }??????? //04
???????? else min2++;
?????? }
??????????? //05
?????? else if(sec2==9)
?????? {???????? //06
??????? sec1++;
??????? sec2=0;
?????? }???????? //06
?????? else sec2++;
???
????
????? view8279();
????? num_20=20;???????? //7
???? }
???
???? void view8279(void)
???? {??
????? if (1)??? //在正常顯示情況下顯示各位數(shù)字
????? {
????????? Z8279=LEDWR0;
??????????? D8279=led[sec2];
??????????? D8279=led[sec1];
????? D8279=0x40;?????
??????????? D8279=led[min2];
??????????? D8279=led[min1];
??????????? D8279=0x40;
??????????? D8279=led[hour2];
??????????? D8279=led[hour1];
????? }
???? }