C51代码(1602显示器+串口接收温度、适度、报警信号)

1、#include<reg52.h>#include<intrins.h>#define unchar unsigned charsbit RS=P20;sbit RW=P21;sbit E=P22;sbit BF=P07;sbit BEEP=P36;unchar code status="STATUS:"unchar code ok="OK!"unchar code warning="WARNING!"unchar code temp="TEMP:"unchar code cent=&quo

2、t;/C"unchar code list="0123456789"unchar code hum="HUM:"unchar code per="%"unchar valueold="00.00"unchar valuenew="00.00"unchar humold="00"unchar humnew="00"char flag=0;bit last0=1;bit last1=1;bit last2=1;bit last3=1;bit wen=

3、1;unchar count=0;unchar jieshou;unchar wendu=0x00;unchar shidu=0x00;void delayms()unchar i,j;for(i=0;i<10;i+)for(j=0;j<33;j+);void delay(unchar n)for(;n>0;n-)delayms();unchar busytest()bit result;RS=0;RW=1;E=1;_nop_();_nop_();_nop_();_nop_();result=BF;E=0;return result;void wrcode(unchar x)

4、while(busytest()=1);RS=0;RW=0;E=0;_nop_();_nop_();P0=x;_nop_();_nop_();_nop_();_nop_();E=1;_nop_();_nop_();_nop_();_nop_();E=0;void wrddram(unchar add)wrcode(add|0x80);void wrdata(unchar dat)while(busytest()=1);RS=1;RW=0;E=0;_nop_();_nop_();P0=dat;_nop_();_nop_();_nop_();_nop_();E=1;_nop_();_nop_();

5、_nop_();_nop_();E=0;void lcd_initial()delay(15);wrcode(0x38); /0011 、1000 ：001（8位口）、（双行）（5*7点阵）00delay(5);wrcode(0x0c); /0000 、1100：0000 、1（开显示）（关光标）（字符不闪烁）delay(5);wrcode(0x06); /0000、0110：0000、01（光标右移）（整体不移位） delay(5);wrcode(0x01); /清屏delay(5);void display1()unchar i;lcd_initial();delay(10);wrcode

6、(0x01);wrddram(0x00);i=0;while(statusi!='0')wrdata(statusi);i+;delay(100);wrddram(0x47);i=0;while(oki!='0')wrdata(oki);i+;delay(100);delay(100);void buzzer()unchar j; for(j=0;j<200;j+)BEEP=0;delay(2);BEEP=1;delay(2);void display2()unchar i,m;lcd_initial();delay(10);for(m=0;m<3;

7、m+)buzzer();wrcode(0x01);wrddram(0x00);i=0;while(statusi!='0')wrdata(statusi);i+;delay(100);wrddram(0x47);i=0;while(warningi!='0')wrdata(warningi);i+;delay(100);void display3()unchar i;lcd_initial();delay(10);wrcode(0x01);wrddram(0x00);i=0;while(tempi!='0')wrdata(tempi);i+;de

8、lay(100);wrddram(0x47);i=0;while(valueoldi!='0')wrdata(valueoldi);i+;delay(100);i=0;while(centi!='0')wrdata(centi);i+;delay(100);void display4()unchar i;lcd_initial();delay(10);wrcode(0x01);wrddram(0x00);i=0;while(humi!='0')wrdata(humi);i+;delay(100);wrddram(0x47);i=0;while(h

9、umoldi!='0')wrdata(humoldi);i+;delay(100);i=0;while(peri!='0')wrdata(peri);i+;delay(100);void send(unchar c)SBUF=c;delay(10);void process1()unchar TEMPN,TEMPD;TEMPN=(wendu>>2);TEMPD=(wendu&0x03);valuenew0=(listTEMPN/10);valuenew1=(listTEMPN%10);TEMPD*=25;valuenew3=(listTEMP

10、D/10);valuenew4=(listTEMPD%10);void process2()humnew0=(listshidu/10);humnew1=(listshidu%10);void alter1()unchar i,addr=0x47;for(i=0;i<5;i+)if(valueoldi!=valuenewi)valueoldi=valuenewi;wrddram(addr);wrdata(valueoldi);addr+;void alter2()unchar i,addr=0x47;for(i=0;i<2;i+)if(humoldi!=humnewi)humold

11、i=humnewi;wrddram(addr);wrdata(humoldi);addr+;void int_initial()TMOD=0x21;TH1=0xfa;TL1=0xfa;TR1=1;TH0=0x04;TL0=0x00;ET0=1;TR0=1;IT0=1;EX0=1;SCON=0x50;ES=1;IP=0x10;EA=1;void int0() interrupt 0 /unchar i;EX0=0;if(flag!=2)&&(flag!=3)flag+;elseflag=0;if(flag=1)wen=1;elsewen=0; delay(200);EX0=1;v

12、oid t0() interrupt 1count+;if(count=10)count=0;if(wen)send(0x00);elsesend(0x01);void uart() interrupt 4if(RI)jieshou=SBUF;if(jieshou=0xff)flag=3;if(jieshou=0x00)flag=0;if(wen)wendu=jieshou;process1(); elseshidu=jieshou; process2(); RI=0;if(TI)TI=0;void main()/unchar i,j;int_initial();delay(200);while(1)switch(flag)case 0 :if(last0=1)display1();last0=0;last1=1;last2=1;last3=1; break;case 1 :if(last1=1)display3();