ds18b20--C51程序

#include<reg51.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int uchar code duan[]={192, 249, 164, 176, 153, 146, 130, 248, 128, 144,191,255}; uchar code xs[]={0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9}; uchar zeng,xiao,fuhao,h,l; char hh,hl,temp; uchar data wei_m[4]; uchar bdata dm,c; sbit c7=c^7; sbit DQ=P3^3; sbit dm0=dm^0; sbit k1=P1^7;//模式键 sbit k2=P1^5;//加 sbit k3=P1^6;//减 sbit beep=P3^7; void de60us(uchar x) { uchar a,b; for(a=x;a>0;a--){ b=8; while(b--); } } void dsplay(void) { uchar i; wei_m[0]=duan[xs[xiao]]; wei_m[1]=duan[zeng%10]&0x7f; wei_m[2]=duan[(zeng/10)%10]; wei_m[3]=duan[zeng/100]; if((zeng/100)==0) {wei_m[3]=duan[fuhao];} P2=0x7f; for(i=0;i<4;i++) { P0=wei_m[i]; de60us(80); P0=0xff; P2=(P2>>1)|0x80; } } void xieshi(void) { uchar i; wei_m[0]=duan[temp%10]; wei_m[1]=duan[(temp/10)%10]; wei_m[2]=duan[temp/100]; if((temp/100)==0) {wei_m[2]=duan[fuhao];} P2=0x7f; for(i=0;i<4;i++){ P0=wei_m[i]; de60us(50); P0=0xff; P2=(P2>>1)|0x80; } } void reset(void) { DQ=1; _nop_(); DQ=0; de60us(8); DQ=1; de60us(1); while(DQ==1); while(DQ==0); _nop_(); } void writ(uchar com) { uchar b; for(b=0;b<8;b++) { dm=com; DQ=0; _nop_(); DQ=dm0; de60us(1); DQ=1; com=dm>>1; _nop_(); _nop_(); } } uchar read(void) { uchar a; for(a=0;a<8;a++) { DQ=1; DQ=0; _nop_(); c=c>>1; DQ=1; _nop_(); _nop_();c7=DQ; de60us(1); } return(c); } void clxs(void) { fuhao=(h<<4)&0x80; if(fuhao==0x80) { fuhao=10; l=(~l)+0x01;h=(~h);} else {fuhao=11; } zeng=(h<<4)|(l>>4); xiao=l&0x0f; dsplay(); } void key(void) { uchar a=1; do{ if(k1==0){de60us(250);if(k1==0){while(k1==0);de60us(100);a++;}} switch(a){ case 1:{ wei_m[3]=0x89; fuhao=hh&0x80; if(fuhao==0x80) { fuhao=10;temp=~hh+1; } else { fuhao=11;temp=hh; } xieshi(); if(k2==0) { de60us(250); if(k2==0) { while(k2==0); de60us(100); hh++; if(hh>125){ hh=-55; }}} if(k3==0){ de60us(250); if(k3==0) { while(k3==0); de60us(100); hh--; if(hh<-55){ hh=125; }}} };break; case 2:{ wei_m[3]=0xc7; fuhao=hl&0x80; if(fuhao==0x80) { fuhao=10; temp=~hl+1; } else {fuhao=11;temp=hl;} xieshi(); if(k2==0) { de60us(250); if(k2==0) { while(k2==0); de60us(100); hl++; if(hl>125){ hl=-55; }}} if(k3==0) { de60us(250); if(k3==0) { while(k3==0); de60us(100); hl--; if(hl<-55){ hl=125; }}} };break; default :break; } }while(a<3); } void main(void) { uchar bj; hh=27;hl=18; while(1) { if(k1==0){de60us(250);if(k1==0){while(k1==0);key();}} reset(); writ(0xcc); writ(0x44); reset(); writ(0xcc); writ(0xbe); l=read(); h=read(); bj=(h<<4)|(l>>4); if((bj>hh)||(bj<hl)){beep=~beep;} clxs(); } }