數碼管顯示部分的原理圖（開發板中只需要截圖顯示部分即可）：http://www.zg4o1577.cn/f/51hei-5.pdf
電路:ds18b20接在p2.2 數碼管用8位共陰極數碼管，2個573鎖存 詳見上面的51hei單片機開發板的pdf圖，本人測試成了.
程序源代碼：
- #include<reg51.h>
- #define uchar unsigned char
- #define uint unsigned int
- sbit wela=P2^7;
- sbit dula=P2^6;
- sbit DS=P2^2;
- uchar A;
- uint dian;
- uchar smg_change[6]={10,10,10,10,10,10};
- unsigned char code duanma[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00};
- unsigned char code weima[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
- void delay(unsigned int a)
- {
- while(a--);
- }
- void init_tempr()
- {
- uchar n;
- DS=1;
- delay(8);
- DS=0;
- delay(80); //500us
- DS=1;
- delay(8);
- n=DS;
- delay(4);
- }
- void write_byte(uchar dat)
- {
- uchar i;
- for(i=0;i<8;i++)
- {
- DS=0;
- DS=dat&0x01;
- delay(4);
- DS=1;
- dat>>=1;
- }
- delay(4);
- }
- uchar read_byte(void)
- {
- uchar i,value;
- for(i=0;i<8;i++)
- {
- DS=0;
- value>>=1;
- DS=1;
- if(DS)
- value|=0x80;
- delay(4);
- }
- return value;
- }
- uchar readtempr(void)
- {
- uint temp, a,b;
- init_tempr();
- write_byte(0xcc);
- write_byte(0x44);
- delay(300);
- init_tempr();
- write_byte(0xcc);
- write_byte(0xbe);
- a=read_byte();
- b=read_byte();
- temp=b;
- temp<<=4;
- temp+=(a&0xf0)>>4;
- dian=(a&0x0f)*10*6/10;
- return temp;
- }
- void display()
- {
- uchar i;
- for(i=0;i<6;i++)
- {
- P0=0X00;
- dula=1;
- dula=0;
- P0=weima[i];
- wela=1;
- wela=0;
- P0=duanma[smg_change[i]];
- dula=1;
- dula=0;
- delay(200);
- }
- P0=weima[1];
- wela=1;
- wela=0;
- P0=duanma[smg_change[1]]|0x80;
- dula=1;
- dula=0;
- delay(200);
- P0=0X00;
- dula=1;
- dula=0;
- }
- void dis_deal()
- {
- smg_change[0]=A/10;
- smg_change[1]= A%10;
- smg_change[2]=dian/10 ;
- smg_change[3]=dian%10 ;
- }
- void main()
- {
- while(1)
- {
- A=readtempr();
- dis_deal();
- display();
- }
- }
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