標(biāo)題:
[求助]這個DS18B20測溫程序,怎樣可以改成可調(diào)溫控程序?
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作者:
流浪乞丐
時間:
2012-6-13 12:33
標(biāo)題:
[求助]這個DS18B20測溫程序,怎樣可以改成可調(diào)溫控程序?
#include
#include
#define uint unsigned int #define uchar unsigned char uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,0x7f,0x6f}; //不帶小數(shù)點 uchar code table1[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd, 0x87,0xff,0xef}; //帶小數(shù)點 uchar Ds; uint temp; sbit ds=P1^7; sbit du=P2^6; sbit we=P2^7; sbit beep=P2^2; sbit jd=P2^3; sbit key_up=P3^2; sbit key_down=P3^4; float futemp; /************ 延時函數(shù) ************/ void delay(uint z) //ms延時 { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } /************ DS18B20函數(shù) ***********/ dsreset(void) //DS18B20復(fù)位 初始化函數(shù) { uint i; ds=0; i=103; while(i>0) i--; ds=1; i=4; while(i>0) i--; Ds=ds; i=4; while(i>0) i--; return Ds; } bit tempreadbit(void) //讀一位數(shù)據(jù)函數(shù) { uint i; bit dat; ds=0;i++; ds=1;i++;i++; dat=ds; i=8;while(i>0) i--; return(dat); } uchar tempread(void) //讀一個字節(jié)數(shù)據(jù)函數(shù) { uchar i,j,dat; dat=0; for(i=1;i<=8;i++) { j=tempreadbit(); dat=(j<<7)|(dat>>1); } return(dat); } void tempwritebyte(uchar dat) //寫一個字節(jié)數(shù)據(jù)函數(shù) { uint i; uchar j; bit testb; for(j=1;j<=8;j++) { testb=dat&0x01; dat=dat>>1; if(testb) //寫1 { ds=0; i++;i++; ds=1; i=8;while(i>0) i--; } else //寫0 { ds=0; i=8;while(i>0) i--; ds=1; i++;i++; } } } /************ 獲取溫度并轉(zhuǎn)換 ***********/ void tempchange(void) //DS18B20 開始獲取溫度并轉(zhuǎn)換 { dsreset(); delay(1); tempwritebyte(0xcc); tempwritebyte(0x44); } uint get_temp() //讀取寄存器中存儲的溫度數(shù)據(jù) { uchar a,b; dsreset(); delay(1); tempwritebyte(0xcc); tempwritebyte(0xbe); a=tempread(); b=tempread(); temp=b; temp<<=8; temp=temp|a; futemp=temp*0.0625; temp=futemp*10+0.5; futemp=futemp+0.05; return temp; } /************ 按鍵掃描函數(shù) ************/ /************ 顯示子函數(shù) ***********/ void play(uint xs) { uchar bai,shi,ge; bai=xs/100; shi=xs%100/10; ge=xs%10; du=1; P0=table[bai]; du=0; P0=0xff; we=1; P0=0xdf; we=0; delay(1); du=1; P0=table1[shi]; du=0; P0=0xff; we=1; P0=0xbf; we=0; delay(1); du=1; P0=table[ge]; du=0; P0=0xff; we=1; P0=0x7f; we=0; delay(1); } /************ 主函數(shù) ***********/ void main() { while(1) { tempchange(); play(get_temp()); } }
[此貼子已經(jīng)被作者于2012-6-13 12:34:02編輯過]
作者:
ahshmj
時間:
2012-6-14 20:14
怎么是這樣的?
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