激光传感器探测目标程序设计，要求有目标时 能驱动蜂鸣器报警，二极管发光

推荐回答

#include <REG52.h> #include <INTRINS.h> unsigned char code displaybit[]={0xfe,0xfd,0xfb,0xf7, 0xef,0xdf,0xbf,0x7f}; unsigned char code displaycode[]={0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71,0x00,0x40}; unsigned char code dotcode[32]={0,3,6,9,12,16,19,22, 25,28,31,34,38,41,44,48, 50,53,56,59,63,66,69,72, 75,78,81,84,88,91,94,97}; unsigned char displaycount; unsigned char displaybuf[8]={16,16,16,16,16,16,16,16}; unsigned char timecount; unsigned char readdata[8]; sbit DQ=P3^7; bit sflag; bit resetpulse(void) { unsigned char i; DQ=0; for(i=255;i>0;i--); DQ=1; for(i=60;i>0;i--); return(DQ); for(i=200;i>0;i--); } void writemandtods18b20(unsigned char mand) { unsigned char i; unsigned char j; for(i=0;i<8;i++) { if((mand & 0x01)==0) { DQ=0; for(j=35;j>0;j--); DQ=1; } else { DQ=0; for(j=2;j>0;j--); DQ=1; for(j=33;j>0;j--); } mand=_cror_(mand,1); } } unsigned char readdatafromds18b20(void) { unsigned char i; unsigned char j; unsigned char temp; temp=0; for(i=0;i<8;i++) { temp=_cror_(temp,1); DQ=0; _nop_(); _nop_(); DQ=1; for(j=10;j>0;j--); if(DQ==1) { temp=temp | 0x80; } else { temp=temp | 0x00; } for(j=200;j>0;j--); } return(temp); } void main(void) { TMOD=0x01; TH0=(65536-4000)/256; TL0=(65536-4000)%256; ET0=1; EA=1; while(resetpulse()); writemandtods18b20(0xcc); writemandtods18b20(0x44); TR0=1; while(1) { ; } } void t0(void) interrupt 1 using 0 { unsigned char x; unsigned int result; TH0=(65536-4000)/256; TL0=(65536-4000)%256; if(displaycount==2) { P0=displaycode[displaybuf[displaycount]] | 0x80; } else { P0=displaycode[displaybuf[displaycount]]; } P2=displaybit[displaycount]; displaycount++; if(displaycount==8) { displaycount=0; } timecount++; if(timecount==150) { timecount=0; while(resetpulse()); writemandtods18b20(0xcc); writemandtods18b20(0xbe); readdata[0]=readdatafromds18b20(); readdata[1]=readdatafromds18b20(); for(x=0;x<8;x++) { displaybuf[x]=16; } sflag=0; if((readdata[1] & 0xf8)!=0x00) { sflag=1; readdata[1]=~readdata[1]; readdata[0]=~readdata[0]; result=readdata[0]+1; readdata[0]=result; if(result>255) { readdata[1]++; } } readdata[1]=readdata[1]<<4; readdata[1]=readdata[1] & 0x70; x=readdata[0]; x=x>>4; x=x & 0x0f; readdata[1]=readdata[1] | x; x=2; result=readdata[1]; while(result/10) { displaybuf[x]=result%10; result=result/10; x++; } displaybuf[x]=result; if(sflag==1) { displaybuf[x+1]=17; } x=readdata[0] & 0x0f; x=x<<1; displaybuf[0]=(dotcode[x])%10; displaybuf[1]=(dotcode[x])/10; while(resetpulse()); writemandtods18b20(0xcc); writemandtods18b20(0x44); } }