基于单片机的多路温度检测系统设计

#include#define uint unsigned int #define uchar unsigned charsbit lcdrs=P30;sbit lcdrw=P31;sbit lcden=P32;/LCD选通线sbit DQ=P17;/18B20引脚uint value;/温度值sbit sound=P16;/蜂鸣器sbit warning=P35;/LED报警灯sbit greenled=P36;/LED报警灯sbit k1=P10;/setsbit k2=P11;/+sbit k3=P12;/-char max=40;/初始温度最大值char min=10;/初始温度最小值uchar change_flag;/按键次数uchar code table1=0x28,0x30,0xc5,0xb8,0x00,0x00,0x00,0x8e;/rom1 测得的序列号uchar code table2=0x28,0x31,0xc5,0xb8,0x00,0x00,0x00,0xb9;/rom2uchar code table3=0x28,0x32,0xc5,0xb8,0x00,0x00,0x00,0xe0;/rom3uchar code table4=0x28,0x33,0xc5,0xb8,0x00,0x00,0x00,0xd7;/rom4uchar code table5=Temple;uchar code table6=max: min: ;uint temper5;/温度值缓存bit fg=0;/温度正负标志void delay(uint n) uint x,y; for(x=n;x0;x-) for(y=110;y0;y-); void write_com(uchar com)lcdrs=0;/rs=0时输入指令P2=com;delay(5);lcden=1;/en=1时读取信息delay(5);lcden=0;/1 - 0 执行指令void write_dat(uchar dat)lcdrs=1; /rs=1时输入数据P2=dat;delay(5);lcden=1;delay(5);lcden=0;void init_lcd()lcden=0;lcdrw=0;write_com(0x38); /8位数据，双列，5*7字形write_com(0x0c); /开启显示屏，关光标，光标不闪烁write_com(0x06); /显示地址递增，即写一个数据后，显示位置右移一位write_com(0x01);void delay_us(uchar t)/微妙延时while(t-);void init_ds18b20()/数据初始化DQ=1;delay_us(4);DQ=0;delay_us(80);DQ=1;delay_us(200);void write_ds18b20(uchar dat) /写数据uchar i;for(i=0;i1;delay_us(10);uchar read_ds18b20() /读数据uchar i=0,readat=0;for(i=0;i1; /八位全部都是0，向右移一位后，仍然全是0DQ=1;if(DQ) /如果DQ为1，readat进行或运算，如果为0，则子语句不执行，直接for循环此时采集的数据是0readat=readat|0x80;/此时最高位为1 ，然后再进行for循环 最高位成为第七位，依次往复delay_us(10);return readat;void check_rom(uchar a) /匹配序列号uchar j; write_ds18b20(0x55);if(a=1)for(j=0;j8;j+)write_ds18b20(table1j);if(a=2)for(j=0;j8;j+)write_ds18b20(table2j);if(a=3)for(j=0;j8;j+)write_ds18b20(table3j);if(a=4)for(j=0;j8;j+)write_ds18b20(table4j);uint change_ds18b20(uchar z)/为DS18B20序号uchar tl,th;init_ds18b20(); /初始化write_ds18b20(0xcc); /跳过init_ds18b20(); if(z=1)check_rom(1); / 匹配rom1if(z=2)check_rom(2); / 匹配rom2if(z=3)check_rom(3); / 匹配rom3if(z=4)check_rom(4); / 匹配rom4write_ds18b20(0x44);init_ds18b20();write_ds18b20(0xcc);init_ds18b20();if(z=1)check_rom(1); /if(z=2)check_rom(2); /if(z=3)check_rom(3); /if(z=4)check_rom(4); /write_ds18b20(0xbe); /启动读暂存器。读内部ram中9字节温度数据tl=read_ds18b20();th=read_ds18b20();value=th;value=value8;value=value|tl;if(th = 0x80)fg=1; value=value+1;value=value*(0.0625*10);return value;void display_lcd1602(uchar z)/显示各个温度 uchar i; if(z=1) write_com(0x80); for(i=0;i6;i+) write_dat(table5i);delay(3); write_dat(0x2d); write_dat(0x41); write_dat(0x3a); if(fg=1) write_dat(0xb0); if(fg=0) write_dat(0x20); write_dat(value/100+0x30); write_dat(value%100/10+0x30); write_dat(0x2e); write_dat(value%10+0x30); write_dat(0xdf); write_dat(0x43); if(z=2) write_com(0x80); for(i=0;i6;i+) write_dat(table5i);delay(3); write_dat(0x2d); write_dat(0x42); write_dat(0x3a); if(fg=1) write_dat(0xb0); if(fg=0) write_dat(0x20); write_dat(value/100+0x30); write_dat(value%100/10+0x30); write_dat(0x2e); write_dat(value%10+0x30); write_dat(0xdf); write_dat(0x43); if(z=3) write_com(0x80); for(i=0;i6;i+) write_dat(table5i);delay(3); write_dat(0x2d); write_dat(0x43); write_dat(0x3a); if(fg=1) write_dat(0xb0); if(fg=0) write_dat(0x20); write_dat(value/100+0x30); write_dat(value%100/10+0x30); write_dat(0x2e); write_dat(value%10+0x30); write_dat(0xdf); write_dat(0x43); if(z=4) write_com(0x80); for(i=0;i6;i+) write_dat(table5i);delay(3); write_dat(0x2d); write_dat(0x44); write_dat(0x3a); if(fg=1) write_dat(0xb0); if(fg=0) write_dat(0x20); write_dat(value/100+0x30); write_dat(value%100/10+0x30); write_dat(0x2e); write_dat(value%10+0x30); write_dat(0xdf); write_dat(0x43); void lcd_set_mun()/显示设置菜单 uchar i; write_com(0x80); for(i=0;i16;i+) write_dat(table6i);delay(3); void lcd_set(char max,char min)/显示最大最小值uchar x1,x2,x3,x4; uchar flag_max,flag_min;if(max0)flag_max=1;max=-max;elseflag_max=0;if(min2) change_flag=0; while(k1=0);void key2()if(k2=0) if(change_flag=1) max+;if(change_flag=2) min+; while(k2=0);void key3()if(k3=0) if(change_flag=1) max-; if(change_flag=2) min-; while(k3=0);void key()/按钮 key2();key1();key3();void alarm(uint t ) int tt;/t是温度绝对值，tt是有符号数，需要转换t=t*0.1;if(fg=0) /正温度tt=t;if(fg=1)/负温度tt=t+1;if(ttmax)sound=0;warning=1; greenled=0; elseif(ttmin)sound=0;warning=1; greenled=0; elsesound=1;warning=0; greenled=1; void main()uchar m=1;uchar i;uchar a=1,b=