HS1101湿度计（PCB+原理图）

#include<at89x52.h> #define uchar unsigned char #define uint unsigned int unsigned char code table[] = {'0','1','2','3','4','5','6','7','8','9'}; uchar num=0; uint number; uchar WAN,QIAN,BAI,SHI,GE; void timero(void) interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; num++; } void delay(uint x) { uchar i; while(x--) for(i=125;i!=0;i--); } void init() { //P2=table[0]; //P1=0x00; TMOD=0x51; TH0=-50000/256; TL0=-50000%256; ET0=1; TR0=1; TR1=1; EA=1; } sbit int1=P3^3; //定义管脚功能 sbit cs=P3^5; sbit wr=P3^7; sbit rd=P3^6; #define LCD_data P0 sbit LCD_RS=P2^7; sbit LCD_RW=P2^6; sbit LCD_EN=P2^5; sbit LCD_PSB=P2^4; //sbit LCD_RST=P0^6; unsigned int date; void delay_ms(uint x) { int i,j; for(j = 0; j < x; j++) { for(i = 0; i < 110; i++) { ; } } } void delay10ms(void) //延时10ms { unsigned char i,j; for(i=20;i>0;i--) for(j=248;j>0;j--); } void write_cmd(uchar cmd)//写入指令 { LCD_RS=0; LCD_RW=0; LCD_EN=0; P0=cmd; delay_ms(5); LCD_EN=1; delay_ms(5); LCD_EN=0; } /*设定显示位置*/ void lcd_pos(uchar X, uchar Y) { uchar pos; if(X == 0) { X = 0x80; } else if(X == 1) { X = 0x90; } else if(X == 2) { X = 0x88; } else if(X == 3) { X = 0x98; } pos = X + Y; write_cmd(pos); //显示地址 } /*写显示数据到LCD*/ /* RS=H ——表示DB0-DB7为显示数据 RW=L ——RW=L,E='H-L',DB0-DB7数据被写到IR或DR E=高脉冲 DB0-DB7=显示数据 */ void write_dat(uchar dat)//写入数据 { LCD_RS=1; LCD_RW=0; LCD_EN=0; P0=dat; delay_ms(1); LCD_EN=1; delay_ms(1); LCD_EN=0; } /*LCD初始化*/ void lcd_init() { // LCD_RST=1;// 禁用LCD复位 LCD_PSB=1;//并口方式 write_cmd(0x30);//基本操作指令 delay_ms(1); write_cmd(0x0c);//打开显示，光标关闭 delay_ms(1); write_cmd(0x01);//清除LCD显示类容,执行要4.6ms。 delay_ms(5); write_cmd(0x06);//光标右移，整体不移 } void display_init() { uint i; uchar dis1[]={"湿度："}; lcd_pos(0,0); i=0; while(dis1[i]!='\0') // { write_dat(dis1[i]); i++; } } void dis_refresh() //BCD码 { lcd_pos(0,3); write_dat(table[date/1000]); //显示千位 write_dat(table[date%1000/100]); write_dat(table[date%100/10]); write_dat(table[date%10]); } void main() { init(); lcd_init();//液晶初始化 display_init();//液晶显示 while(1) { if(num>=20) { num=0; number=TH1*256+TL1; TH1 = 0; TL1 = 0; if(( 5623<= number)&&( number<=6852) )//相对湿度在有效范围内（0％－－100%） { if(( 6734<number)&&( number<= 6852) ) { SHI = 0; GE =(6852 -number)*10/118; } if( (6618<number)&&( number<= 6734) ) { SHI = 1; GE =(6734 -number)*10/116; } if( (6503<number)&&( number<= 6618 ) ) { SHI = 2; GE =(6618 -number)*10/115; } if( (6388<number)&&( number<= 6503 ) ) { SHI = 3; GE =(6503 -SHI)*10/115; } if( (6271<number)&&( number<= 6388 ) ) { SHI = 4; GE =(6388 -number)*10/117; } if( (6152<number)&&( number<= 6271 ) ) { SHI = 5; GE =(6271 -number)*10/119; } if( (6029<number)&&( number<= 6152 ) ) { SHI = 6; GE =(6152 -number)*10/123; } if( (5901<number)&&( number<= 6029 ) ) { SHI = 7;GE =(6029 -number)*10/128; } if( (5766<number)&&( number<= 5901 )) { SHI= 8; GE =(5901 -number)*10/135; } if( (5623<number)&&(number<= 5766)) { SHI = 9; GE =(5766 -number)*10/143; } } else { GE = 0; SHI = 0; } } date=SHI*10+GE; //读出数据湿度 dis_refresh(); //BCD码 } }