51单片机测并温显示

1、要求：测当前温度，并在数码管上显示晶振 :11.0592MH程序如下：#include #define uchar unsigned char#define uint unsigned intsbit DS=P2A2;uint temp;uchar flag1;sbit dula=卩2人6;sbit wela=卩2人7;unsigned char code table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71;unsigned char code table1=0xbf,0x8

2、6,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef;/define interface/ variable of temperature/ sign of the result positive or negativevoid delay(uint count)uint i;while(count)/delayi=200; while(i0) i-;count-;void dsreset(void)uint i;DS=0;i=103;while(i0)i-;DS=1;i=4; while(i0)i-;/send reset and initialization

3、commandbit tmpreadbit(void)uint i;/read a bitbit dat;DS=0;i+;DS=1;i+;i+; dat=DS; i=8;while(i0)i-; return (dat);/i+ for delayuchar tmpread(void)uchar i,j,dat;dat=0;for(i=1;i=8;i+) j=tmpreadbit(); dat=(j1); / 读出的数据最低位在最前面，这样刚好一个字节在 return(dat);/read a byte dateDAT里void tmpwritebyte(uchar dat) /write a

4、 byte to ds18b20 uint i;uchar j;bit testb; for(j=1;j1;if(testb) /write 1DS=0; i+;i+;DS=1; i=8;while(i0)i-;elseDS=0;/write 0i=8;while(i0)i-; DS=1; i+;i+;/ address all drivers on bus /initiates a single temperature conversionvoid tmpchange(void)dsreset();delay(1);tmpwritebyte(0xcc); tmpwritebyte(0x44);/DS18B20 begin changeuint tmp()float tt; uchar a,b; dsreset(); delay(1);tmpwritebyte(0xcc); tmpwritebyte(0xbe);