ds18b20与51单片机多路温度传感器

51 单片机 C 程序#include#include#define uchar unsigned charsbit RS=P35; /定义 LCD 端口sbit RW=P36;sbit E=P37;sbit DQ=P34; /定义单总线端口uchar LCD_3,LCD_2,LCD_1,LCD_0;uchar ds18b20_romA8=0x8e,0x00,0x00,0x00,0xb8,0xc5,0x30,0x28;/四个 DS18B20 的 64 位 ROM 地址uchar ds18b20_romB8=0x52,0x00,0x00,0x00,0xb8,0xc5,0x34,0x28;uchar ds18b20_romC8=0x65,0x00,0x00,0x00,0xb8,0xc5,0x35,0x28;uchar ds18b20_romD8=0x3c,0x00,0x00,0x00,0xb8,0xc5,0x36,0x28;uchar code LCDData =“0123456789“; uchar code dot_tab =“0112334456678899“; uchar first_line16=“A:000.0 B:000.0“; /LCD 第一行显示缓存数组uchar second_line16=“C:000.0 D:000.0“; /LCD 第二行显示缓存数组/*/延时程序/*void delay(unsigned int N)unsigned int i;for(i=0;ii;temp=tempwrite_bit(temp);delay(5);/*/64 位的 ROM 序列号匹配/*bit match_rom(uchar *rom)uchar i;ds18b20_init();write_byte(0x55);for(i=8;i0;i-)write_byte(*(rom+i-1);return 1;/*/从 ds18b20 中读出 64 位序列号/*/*uchar * read_rom(void)uchar rom8,i;ds18b20_init();write_byte(0x33);for(i=8;i0;i-)romi-1=read_byte();return */*/将 64 位序列号显示在 LCD 上显示出来/*/*void print_char(uchar a)if(a=0LCD_3=LCDDatatemp/100; /查表得温度百位LCD_2=LCDData(temp%100)/10; /查表得温度十位LCD_1=LCDData(temp%100)%10; /查表得温度个位 void display(void)uchar i;write_command(0x80);for(i=0;i16;i+)write_data(first_linei);write_command(0xc0);for(i=0;i16;i+)write_data(second_linei);void main(void) uchar temp_data_l,temp_data_h;/*uchar *ds18b20_rom;*/init_lcd1602();/*while(1)uchar i;ds18b20_rom=read_rom(); /读序列号write_command(0x80);for(i=0;i8;i+) ds18b20_romAi=*ds18b20_rom;ds18b20_rom+;write_command(0x80);for(i=0;i8;i+) /显示序列号print_char(ds18b20_romAi/16);print_char(ds18b20_romAi%16);*/while(1)ds18b20_init();write_byte(0xcc);write_byte(0x44); /启动温度转换delay(700);match_rom(ds18b20_romA); /匹配第一路write_byte(0xbe); /读温度temp_data_l= read_byte(); /温度低 8 位temp_data_h = read_byte(); /温度高 8 位 convert_T(temp_data_h,temp_data_l);first_line2=LCD_3; /温度转换后的各位first_line3=LCD_2; /分别存入显示缓存数组中first_line4=LCD_1;first_line6=LCD_0;match_rom(ds18b20_romB); /匹配第二路write_byte(0xbe); /读温度temp_data_l= read_byte(); /温度低 8 位temp_data_h = read_byte(); /温度高 8 位 convert_T(temp_data_h,temp_data_l);first_line10=LCD_3; /温度转换后的各位first_line11=LCD_2; /分别存入显示缓存数组中first_line12=LCD_1;first_line14=LCD_0;display();match_rom(ds18b20_romC); /匹配第三路write_byte(0xbe); /读温度temp_data_l= read_byte(); /温度低 8 位temp_data_h = read_byte(); /温度高 8 位 convert_T(temp_data_h,temp_data_l);second_line2=LCD_3; /温度转换后的各位second_line3=LCD_2; /分别存入显示缓存数组中second_line4=LCD_1;second_line6=LCD_0;match_rom(ds18b20_romD); /匹配第四路write_byte(0xbe); /读温度temp_data_l= read_byte(); /温度低 8 位temp_data_h = read_byte(); /温度高 8 位 convert_T(temp