89c51+Ds1302实现的电子打铃器

#include<reg51.h> #include<intrins.h> bit ringoff=1; bit keyrelease; unsigned int C,state,i; unsigned int H,M,S; unsigned int RH,RM; unsigned char keyinput=0x00 ; unsigned char input=0x00 ; unsigned char code table[]={ 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xc6 }; unsigned char code dispbit[]={ 0x01,0x02,0x04,0x08,0x10,0x20 }; unsigned int buffer[]={0,0,0,0,0,0}; void delayMS(unsigned int t) { unsigned char i; while(t--) for(i=0;i<125;i++); } void keyprice(unsigned char key); void display (); void main(){ C=0; TMOD=0x01; TH0=(65535-50000)/256; TL0=(65536-50000)%256; EA=1; ET0=1; TR0=1; keyrelease=1; P3=0XFE; while(1){ keyinput = P1&0Xf0; if(keyinput!=0xf0){ delayMS(1); if(keyinput!=0x0f) { if( keyrelease ==1) { keyrelease=0; input=keyinput; } } else{ keyrelease=1; keyprice(input); input=0xff; } } else{ keyrelease=1; keyprice(input); input=0xff; } if(ringoff==0&&H==RH&&M==RM) { P3=0XFF; } display(); } } void time1() interrupt 1 { TH0 =(65535-10000)/256; TL0 =(65536-10000)%256; TR0=1; C++; if( C==100) { S++; C=0; if(S>=60) { M++; S=0; if(M>=60) { H++; S=0; if(H>=24) { H=0; } } } } } void keyprice(unsigned char key){ switch(key){ case 0xe0: state++; if(state>5) state=0; break; case 0xd0: switch(state){ case 0x01: if(H>0) H--; else H=23; break; case 0x02: if(M>0) M--; else M=59; break; case 0x03: if(S>0) S--; else S=59; break; case 0x04: if(RH>0) RH--; else RH=23; break; case 0x05: if(RM>0) RM--; else RM=59; break; } break; case 0xb0: switch(state){ case 0x01: if(H<23) H++; else H=0; break; case 0x02: if(M<59) M++; else M=0; break; case 0x03: if(S<59) S++; else S=0; break; case 0x04: if(RH<23) RH++; else RH=0; break; case 0x05: if(RM<59) RM++; else RM=0; break; } break; case 0x70: ringoff=~ringoff; break; default : break; } } void display () { if(state==4 || state==5) { buffer[0]=RH/10; buffer[1]=RH%10; buffer[2]=RM/10; buffer[3]=RM%10; buffer[4]=0xff; buffer[5]=0xff; for(i=0;i<4;i++) { P0=table[buffer[i]]; P2=dispbit[i]; delayMS(1); P2=0x0; } } else { buffer[0]=H/10; buffer[1]=H%10; buffer[2]=M/10; buffer[3]=M%10; buffer[4]=S/10; buffer[5]=S%10; for(i=0;i<6;i++) { P0=table[buffer[i]]; P2=dispbit[i]; delayMS(1); P2=0x0; } } }