LCD上显示温湿度

12864LCD显示温湿度第一种方式：/*DHT11与12864LCD*/#include #define uchar unsigned char#define uint unsigned intuchar lcd_x,lcd_y,data_byte=0,count;uint TH_data,TL_data,RH_data,RL_data,CK_data;uint TH_temp,TL_temp,RH_temp,RL_temp,CK_temp;uchar num;sbit RS = P20;/并行指令，数据选择信号sbit RW = P21;/读写信号sbit EN = P22;/并行使能信号sbit PSB = P23;/并串口选择信号sbit RST = P25;/复位信号sbit io = P10;/DHT11总线void read_io();/开始信号，读数据并校验void delay(uint a);/延时函数void LCD_init();/LCD初始化程序void write_cmd(uchar cmd);/写指令void write_data(uchar dat);/写数据bit check_busy();/检测LCD忙信号/void clear_gcrom();/清除GCROMvoid delay1();/10us延时void lcd_dis_code(uint cmd_addr,uchar num,uchar dis);/显示函数void lcd_pos(unsigned char X,unsigned char Y);/LCD显示位置计算uchar code lcd=温湿度检测系统 ;uchar code lcd1= 温度:;uchar code lcd2= 湿度:;uchar code lcd3=;uchar code lcd4=%RH;uchar str1= ;uchar str2= ; void main()uchar k,j;LCD_init();lcd_dis_code(0x80,16,lcd);lcd_dis_code(0x88,9,lcd1);lcd_dis_code(0x98,9,lcd2);lcd_dis_code(0x8e,2,lcd3);lcd_dis_code(0x9e,5,lcd4);while(1)read_io();/读取温湿度数据/clear_gcrom();/湿度for(k=0; k2; k+)lcd_pos(4,k+4);write_data(str1k);/clear_gcrom();/温度for(j=0; j2; j+)lcd_pos(3,j+4);write_data(str2j);delay(500);void delay1()/延时10usunsigned char i;for(i=0; i3; i+);void lcd_pos(unsigned char X,unsigned char Y)unsigned char pos;if ( X = 1 ) pos = 0x80 ; else if ( X = 2 ) pos = 0x90 ; else if ( X = 3 ) pos = 0x88 ; else pos = 0x98 ; write_cmd(Y | pos);/数据指针=80+地址变量/*DHT11模块*/uchar receive_byte()/接收一个字节uchar i,temp;for(i=0;i8; i+)count = 2;while(!io) & count+)/等待50us低电平结束，并防止死循环temp = 0;delay1();delay1();delay1();if (io=1) temp = 1;count = 2;while(io & count+);elsetemp = 0;data_byte=1;data_byte|=temp;return (data_byte);void read_io()/开始信号，读数据并校验io = 0;delay(18);/主机拉低18msio = 1;/DATA总线由上拉电阻拉高 主机延时20usdelay1();delay1();delay1();delay1();io = 1;/主机设置为输入高电平，判断从机响应信号if(!io)count = 2;while(!io)&count+);/判断DHT11发出80us低电平响应信号是否结束count = 2;while(io & count+);/判断DHT11拉高总线80us高电平是否结束RH_temp = receive_byte(); RL_temp = receive_byte(); TH_temp = receive_byte(); TL_temp = receive_byte(); CK_temp = receive_byte();io = 1;num = (RH_temp + RL_temp + TH_temp + TL_temp);/数据校验if(num = CK_temp)RH_data = RH_temp; RL_data = RL_temp;TH_data = TH_temp; TL_data = TL_temp; CK_data = CK_temp;/湿度整数部分str10 = (char)(0x30 + RH_data/10);str11 = (char)(0x30 + RH_data%10);/温度整数部分str20 = (char)(0x30 + TH_data/10);str21 = (char)(0x30 + TH_data%10);/*E N D*/*12864模块程序*/*void clear_gcrom()uchar i,j,k;lcd_x = 0x80;lcd_y = 0x80;write_cmd(0x34);for(i = 0 ; i 2 ; i+)/上下两屏幕for(j = 0 ; j 32 ; j+)write_cmd(lcd_y+j);write_cmd(lcd_x); for(k = 0 ; k 16 ; k+)write_data(0x00);lcd_x = 0x88;write_cmd(0x36);write_cmd(0x30);*/ void lcd_dis_code(uint cmd_addr,uchar num,uchar dis)uint i;write_cmd(cmd_addr);for(i=0; inum; i+)write_data(disi);void LCD_init()PSB = 1;RST = 0;delay(5);RST = 1;delay(5);write_cmd(0x34);/扩充指令delay(5);write_cmd(0x30);/基本指令delay(5);write_cmd(0x0c);/显示开关光标delay(5);write_cmd(0x01);/清屏delay(5);bit check_busy()bit temp;RS = 0;RW = 1;EN = 1;delay(5);temp = (bit)(P0&0x80); /按位与操作EN = 0;return (temp);void write_cmd(uchar cmd)while(check_busy();RS = 0;RW = 0;EN = 0;delay(5);P0 = cmd;delay(5);EN = 1;delay(5);EN = 0;void write_data(uchar dat)while(check_busy();RS = 1;RW = 0;EN = 0;P0 = dat;delay(5);EN = 1;delay(5);EN = 0;void delay(uint a)uchar i;while(a-)for(i=0; i113; i+);/*E N D*/第二种编程方式，其实大体都差不了多少#include#include/*宏定义*/#defineuintunsignedint#defineucharunsignedchar#definenoACK0#defineACK1#defineSTATUS_REG_W0x06#defineSTATUS_REG_R0x07#defineMEASURE_TEMP0x03#defineMEASURE_HUMI0x05#defineRESET0x1eenumTEMP,HUMI;typedefunion/定义共用同类型unsignedinti;floatf;value;/*位定义*/sbitlcdrs=P20;sbitlcdrw=P21;sbitlcden=P22;sbitSCK=P10;sbitDATA=P11;/*变量定义*/uchartable2=SHT11温湿度检测;uchartable3=温度为：;uchartable4=湿度为：;uchartable5=.;ucharwendu6;ucharshidu6;/*1ms延时函数*/voiddelay(intz)intx,y;for(x=z;x0;x-)for(y=125;y0;y-);/*50us延时函数*/voiddelay_50us(uintt)uintj;for(;t0;t-)for(j=19;j0;j-);/*50ms延时函数*/voiddelay_50ms(uintt)uintj;for(;t0;t-)for(j=6245;j0;j-);/*12864液晶写指令*/voidwrite_12864com(ucharcom)lcdrs=0;lcdrw=0;delay_50us(1);P0=com;lcden=1;delay_50us(10);lcden=0;delay_50us(2);/*12864液晶写数据*/voidwrite_dat(uchardat)lcdrs=1;lcdrw=0;delay_50us(1);P0=dat;lcden=1;delay_50us(10);lcden=0;delay_50us(2);/*12864液晶初始化*/voidinit12864lcd(void)delay_50ms(2);write_12864com(0x30);delay_50us(4);write_12864com(0x30);delay_50us(4);write_12864com(0x0f);delay_50us(4);write_12864com(0x01);delay_50us(240);write_12864com(0x06);delay_50us(10);write_12864com(0x0c);delay_50us(10);/*12864液晶显示函数*/voiddisplay1(void)uchari;write_12864com(0x80);for(i=0;i18;i+)write_dat(table2i);delay_50us(1);/*12864液晶显示函数*/voiddisplay2(void) uchari;write_12864com(0x90);for(i=0;i18;i+)write_dat(table3i);delay_50us(1);/*12864液晶显示函数*/voiddisplay3(void)uchari;write_12864com(0x88);for(i=0;i8;i+)write_dat(table4i);delay_50us(1);/*12864液晶显示函数*/voiddisplaywendu(void)uchari;write_12864com(0x94);for(i=0;i3;i+)write_dat(wendui);delay_50us(1);for(i=0;i1;i+)write_dat(table5i);delay_50us(1);for(i=4;i5;i+)write_dat(wendui);delay_50us(1);/*12864液晶显示函数*/voiddisplayshidu(void)uchari;write_12864com(0x8C);for(i=0;i3;i+)write_dat(shidui);delay_50us(1);for(i=0;i1;i+)write_dat(table5i);delay_50us(1);for(i=4;i0;i=1)/高位为1，循环右移if(i&value)DATA=1;/和要发送的数相与，结果为发送的位elseDATA=0;SCK=1;_nop_();_nop_();_nop_();/延时3usSCK=0;DATA=1;/释放数据线SCK=1;error=DATA;/检查应答信号，确认通讯正常_nop_();_nop_();_nop_();SCK=0;DATA=1;returnerror;/error=1通讯错误/*SHT11读字节程序*/chars_read_byte(unsignedcharack)unsignedchari,val=0;DATA=1;/释放数据线for(i=0x80;i0;i=1)/高位为1，循环右移SCK=1;if(DATA)val=(val|i);/读一位数据线的值SCK=0;DATA=!ack;/如果是校验，读取完后结束通讯；SCK=1;_nop_();_nop_();_nop_();/延时3usSCK=0;_nop_();_nop_();_nop_();DATA=1;/释放数据线returnval;/*SHT11启动传输*/voids_transstart(void)DATA=1;SCK=0;/准备_nop_();SCK=1;_nop_();DATA=0;_nop_();SCK=0;_nop_();_nop_();_nop_();SCK=1;_nop_();DATA=1;_nop_();SCK=0;/*SHT11连接复位*/voids_connectionreset(void)unsignedchari;DATA=1;SCK=0;/准备for(i=0;i9;i+)/DATA保持高，SCK时钟触发9次，发送启动传输，通迅即复位SCK=1;SCK=0;s_transstart();/启动传输/*SHT11温湿度检测*/ chars_measure(unsignedchar*p_value,unsignedchar*p_checksum,unsignedcharmode)unsignederror=0;unsignedinti;s_transstart();/启动传输switch(mode)/选择发送命令caseTEMP:error+=s_write_byte(MEASURE_TEMP);break;/测量温度caseHUMI:error+=s_write_byte(MEASURE_HUMI);break;/测量湿度default:break;for(i=0;i100)rh_true=100;/湿度最大修正if(rh_true0.1)rh_true=0.1;/湿度最小修正 *p_temperature=t_C;/返回温度结果*p_humidity=rh_true;/返回湿度结果/*主函数*/voidmain(void)unsignedinttemp,humi;valuehumi_val,temp_val;/定义两个共同体，一个用于湿度，一个用于温度unsignedcharerror;/用于检验是否出现错误unsignedcharchecksum;/CRCinit12864lcd();dis