wenduchuangan.rar_ad0808 protues_温度 ad0808

#include<reg52.h> #include<intrins.h> typedef unsigned char uint8; #define uint unsigned int #define uchar unsigned char sbit DQ=P3^3; uchar code Bw[10]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; uchar code Xsw[16]={0x30,0x31,0x31,0x32,0x33,0x33,0x34,0x35,0x36,0x36,0x37,0x38,0x38,0x39,0x39}; sbit RS=P2^0; sbit RW=P2^1; sbit EN=P2^2; sbit BUSY=P0^7; uchar wendu; uchar temp_g,temp_d; unsigned char code word1[]={"Temperature:"}; void delay(uint xms) { uint i,j; for(i=xms;i>0;--i) for(j=110;j>0;j--); } void Delayus(int t) {int s; for(s=0;s<t;s++); } void wait(void) { P0=0xFF; do { RS=0; RW=1; EN=0; EN=1; } while(BUSY==1); EN=0; } void w_dat(uint8 dat) { wait(); EN=0; P0=dat; RS=1; RW=0; EN=1; EN=0; } void w_cmd(uint8 cmd) { wait(); EN=0; P0=cmd; RS=0; RW=0; EN=1; EN=0; } void w_string(uint8 addr_start,uint8 *p) { w_cmd(addr_start); while(*p!='\0') { w_dat(*p++); } } void Init_LCD1602(void) { w_cmd(0x38); w_cmd(0x0c); w_cmd(0x06); w_cmd(0x01); } uchar Reset() { uchar d; DQ=0; Delayus(29); DQ=1; Delayus(3); d=DQ; Delayus(25); return(d); } void write_bit(uchar bitval) { DQ=0; if(bitval==1) DQ=1; Delayus(5); DQ=1; } void ds18write_byte(char val) { uchar i; uchar temp; for(i=0;i<8;i++) { temp=val>>i; temp&=0x01; write_bit(temp); } Delayus(5); } uchar read_bit() { uchar i; DQ=0; DQ=1; for(i=0;i<3;i++) return(DQ); } uchar ds18read_byte() { uchar i; uchar value=0; for(i=0;i<8;i++) { if(read_bit()) value|=0x01<<i; Delayus(6); } return(value); } int Readtemperature() { uchar temp_d,temp_g,k,get[2],temp; Reset(); ds18write_byte(0xcc); ds18write_byte(0x44); Delayus(0); Reset(); ds18write_byte(0xcc); ds18write_byte(0xbe); for(k=0;k<2;k++) { get[k]=ds18read_byte(); } temp_d=get[0]; temp_g=get[1]; if((temp_g&0xf0)==0xf0) { temp_d=~temp_d; if(temp_d==0xff) { temp_d=temp_d+0x01; temp_g=~temp_g; temp_g=temp_g+0x01; } else { temp_d=temp_d+0x01; temp_g=~temp_g; } w_cmd(0xc5); w_dat(Xsw[temp_d&0x0f]); temp=((temp_d&0xf0)>>4)|((temp_g&0x0f)<<4); w_cmd(0xc1); w_dat(0x2d); } else { w_cmd(0xc5); w_dat(Xsw[temp_d&0x0f]); temp=((temp_d&0xf0)>>4)|((temp_g&0x0f)<<4); w_cmd(0xc1); w_dat(Bw[temp/100]); } return temp; } main() { Init_LCD1602(); w_string(0x80,word1); while(1) { wendu=Readtemperature(); temp_g=wendu%100/10+'0'; temp_d=wendu%10+'0'; w_cmd(0xc2); delay(2); w_dat(temp_g); delay(2); w_dat(temp_d); delay(2); w_cmd(0xc4); delay(2); w_dat(0x2e); delay(2); w_cmd(0xc6); delay(2); w_dat(0xdf); delay(2); w_dat(0x43); } }