单片机可设置温度上下限的温控

#include"STC89C51RC.H" #include<absacc.h> #include"ds18b20.h" #include"lcd1602.h" #include"ds1302.h" #include"2402.h" uchar data datadis[]={0x00,0x00,0x00,0x00,0x00}; uint temp=0; sbit K1=P3^5; sbit K2=P3^4; sbit K3=P3^3; sbit K4=P3^2; sbit K5=P3^0; sbit L1=P1^6; sbit speaker=P1^0; uchar keynum=1,flag,flag1,flag2,adder,q; uint k,count,th,tl; uchar th1=8; uchar th2=5; uchar th3=2; uchar th4=0; uchar tab,w; void delay(uchar z) { uchar x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } uchar key4() { if(K4==0) { delay(5); if(K4==0) { while(!K4); keynum++; if(keynum==5)keynum=1; } } return keynum; } void key_lcd() { if(flag1==1&&k==3) //k一定不能掉，不然会在其他菜单里出现乱码 { if(K3==0) //按键判断，选择设置温度的光标 { delay(5); if(K3==0) { while(!K3); flag++; //按键标识位 if(flag==5)flag=1; } } switch(flag) { case 1: { if(K1==0) { delay(5); if(K1==0) { th1++; while(!K1); if(th1==10)th1=0; } } if(K2==0) { delay(5); if(K2==0) { th1--; while(!K2); if(th1==-1)th1=9; } } write_cmd(0xc3); write_dat(th1+0x30); }break; case 2: { if(K1==0) { delay(5); if(K1==0) { th2++; while(!K1); if(th2==10)th2=0; } } if(K2==0) { delay(5); if(K2==0) { th2--; while(!K2); if(th2==-1)th2=9; } } write_cmd(0xc4); write_dat(th2+0x30); }break; case 3: { if(K1==0) { delay(5); if(K1==0) { th3++; while(!K1); if(th3==10)th3=0; } } if(K2==0) { delay(5); if(K2==0) { th3--; while(!K2); if(th3==-1)th3=9; } } write_cmd(0xcb); write_dat(th3+0x30); }break; case 4: { if(K1==0) { delay(5); if(K1==0) { th4++; while(!K1); if(th4==10)th4=0; } } if(K2==0) { delay(5); if(K2==0) { th4--; while(!K2); if(th4==-1)th4=9; } } write_cmd(0xcc); write_dat(th4+0x30); }break; default:break; } } else flag1=0; //m一定不能掉，否则在调节温度的时候会影响其他菜单 th=th1*10+th2; //获取设置温度的高位 tl=th3*10+th4; //获取设置温度的低位 } void alarm_speaker() //报警系统与当前温度进行比较并处理 { if(temp>(th*10)||temp<(tl*10)) { speaker=~speaker; L1=0; adder++; tab=temp/10; write_add(adder,tab); } else { speaker=1; L1=1; } } void main() { systemtime realtime; init_18b20(); init_lcd(); init_2402(); speaker=1; while(1) { k=key4(); get_ds1302(&realtime);//取时间 temp=read_temp(); //取温度 delay(200); //延时 保持数据稳定 避免数据刷新 switch(k) { case 1: //菜单一，显示时间 { write_cmd(0x80); print(" Time: "); print(realtime.TimeString); write_cmd(0xc0); print(" Date: "); print(realtime.DateString); } break; case 2: //菜单二，显示温度 { write_cmd(0x80); print(" DS18B20 is OK "); write_cmd(0xc0); print("NOW TEMP: . C "); if(flagt==1)datadis[0]=0x2d; else datadis[0]=temp/1000+0x30; datadis[1]=temp/100%10+0x30; datadis[2]=temp/10%10+0x30; datadis[3]=0x2e; datadis[4]=temp%10+0x30; write_cmd(0xca); print(datadis); }break; case 3: //菜单三，显示温度设置值 { write_cmd(0x80); print(" change temp: "); write_cmd(0xc0); print("TH= TL= "); write_cmd(0xc3); write_dat(th1+0x30); write_cmd(0xc4); write_dat(th2+0x30); write_cmd(0xc5); write_dat(0xdf); //摄氏度远点 write_cmd(0xc6); write_dat(0x43); write_cmd(0xcb); write_dat(th3+0x30); write_cmd(0xcc); write_dat(th4+0x30); write_cmd(0xcd); //摄氏度符号 write_dat(0xdf); write_cmd(0xce); write_dat(0x43); flag1=1; }break; case 4: //菜单四，记录报警温度 { write_cmd(0x80); print(" ALARM TEMP "); write_cmd(0xc0); print(" RECORD: "); write_cmd(0xcb); write_dat(0xdf); write_cmd(0xcc); write_dat(0x43); flag2=1; }break; default:break; } key_lcd(); //菜单三中温度设置的按键扫描 alarm_speaker(); //报警系统通过2402存储超出的温度，并记录 if(K5==0) //按下K5，就显示当前报警的温度 { delay(5); if(K5==0) { while(!K5); q=read_add(adder); } }; if(flag2==1&&k==4) //k一定不能掉，不然会在其他菜单里出现乱码，菜单四中需要显示存储的报警数据 { write_cmd(0xc9); write_dat(q/10%10+0x30); write_cmd(0xca); write_dat(q%10+0x30); } } }