LCD1602溫濕顯示,全部在附件里。
我家原先有個溫濕度顯示器,用了幾年壞了;我想自己做一個,在網上套淘了STH10傳感器,用STC15F2K60S2單片機組成最小系統,用C語言編程調試完成。顯示溫濕度效果還可以見圖片。 編者:ROCKER(石頭)
IMG_20260603_152002.jpg (2.62 MB, 下載次數: 0)
下載附件
2026-6-5 16:08 上傳
單片機源程序如下:
- /****************************************************************
- ;功能說明:sht11和1602的溫濕度顯示
- ;微處理器:STC15f2k60s2
- ;編譯環境:Keil uVision V4.0
- ;創建日期:2025-9-24
- ;版 本:V1.0
- ;修改日期:2026.5.25 OK
- **********************************************************/
- /*************定義接口********************
- P0.x------DB0~DB7(LCD1602)
- P2.6------RS (LCD1602)
- P2.5------RW (LCD1602)
- P2.4------E (LCD1602)
- P2.1------DATA (SHT1x/7x)
- P2.2------SCK (SHT1x/7x)
- *****************************************/
- #include "stc15f.h"
- #include <intrins.h>
- #include <math.h>
- #include <stdio.h>
- //***************第一部分LCD1602設置 START**********************
- #define LCD_DB P0
- sbit LCD_RS=P2^6;
- sbit LCD_RW=P2^5;
- sbit LCD_E=P2^4;
- /******定義函數****************/
- #define uchar unsigned char
- #define uint unsigned int
- bit lcd_busy();
- void LCD_init(void); //初始化函數
- void LCD_write_command(uchar command); //寫指令函數
- void LCD_write_data(uchar dat);
- void LCD_disp_char(uchar x,uchar y,uchar dat);
- void LCD_disp_str(uchar x,uchar y,uchar *str);
- void delay_n10us(uint n);
- bit lcd_busy()
- {
- bit result;
- LCD_RS= 0;
- LCD_RW=1;
- LCD_E=1;
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- result = (bit)(P0 & 0x80);
- LCD_E=0;
- return result;
- }
- /*--------------------------------------
- ;模塊名稱:LCD_init();
- ;功 能:初始化LCD1602
- ;-------------------------------------*/
- void LCD_init(void)
- {
- delay_n10us(10);
- LCD_write_command(0x38);
- delay_n10us(10);
- LCD_write_command(0x0c);//整體顯示,關光標,不閃爍
- delay_n10us(10);
- LCD_write_command(0x06);//設定輸入方式,增量不移位
- delay_n10us(10);
- LCD_write_command(0x01);
- delay_n10us(100);
- }
- /*--------------------------------------
- ;模塊名稱:LCD_write_command();
- ;功 能:LCD1602寫指令函數
- ;參數說明:dat為寫命令參數
- ;-------------------------------------*/
- void LCD_write_command(uchar dat)
- {
- while(lcd_busy());
- delay_n10us(10);
- LCD_RS=0; //指令
- LCD_RW=0; //寫入
- LCD_E=1; //允許
- LCD_DB=dat;
- delay_n10us(10);
- LCD_E=0;
- delay_n10us(10);
- }
- /*--------------------------------------
- ;模塊名稱:LCD_write_data();
- ;功 能:LCD1602寫數據函數
- ;參數說明:dat為寫數據參數
- ;-------------------------------------*/
- void LCD_write_data(uchar dat)
- {
- while(lcd_busy());
- delay_n10us(10);
- LCD_RS=1; //數據
- LCD_RW=0; //寫入
- LCD_E=1; //允許
- LCD_DB=dat;
- delay_n10us(10);
- LCD_E=0;
- delay_n10us(10);
- }
- /*--------------------------------------
- ;模塊名稱:LCD_disp_char();
- ;功 能:LCD1602顯示一個字符函數,在某個屏幕位置上顯示一個字符,X(0-15),y(1-2)。
- ;-------------------------------------*/
- void LCD_disp_char(uchar x,uchar y,uchar dat)
- {
- uchar address;
- if(y==1)
- address=0x80+x;
- else
- address=0xc0+x;
- LCD_write_command(address);
- LCD_write_data(dat);
- }
- /*--------------------------------------
- ;模塊名稱:LCD_disp_str();
- ;功 能:LCD1602顯示字符串函數,在某個屏幕起始位置{X(0-15),y(1-2)}上顯示一個字符串。
- ;-------------------------------------*/
- void LCD_disp_str(uchar x,uchar y,uchar *str)
- {
- uchar address;
- if(y==1)
- address=0x80+x;
- else
- address=0xc0+x;
- LCD_write_command(address);
- while(*str!='\0')
- {
- LCD_write_data(*str);
- str++;
- }
- }
- /*--------------------------------------
- ;模塊名稱:delay_n10us();
- ;功 能:延時函數,延時約n個10us
- ;修改說明:修改為較精確的延時函數,"_nop_()"延時1us@12M晶振
- ;-------------------------------------*/
- void delay_n10us(uint n)
- {
- uint i;
- for(i=n;i>0;i--)
- {
- _nop_();_nop_();_nop_();
- _nop_();_nop_();_nop_();
- }
- }
- //*********************第二部分sht10設置 START****************************************
- sbit SCK = P2^2;
- sbit DATA = P2^1;
- typedef union
- { unsigned int i;
- float f;
- }
- value;
- enum {TEMP,HUMI};
-
- #define noACK 0 //用于判斷是否結束通訊
- #define ACK 1 //結束數據傳輸
- //adr command r/w
- #define STATUS_REG_W 0x06 //000 0011 0
- #define STATUS_REG_R 0x07 //000 0011 1
- #define MEASURE_TEMP 0x03 //000 0001 1
- #define MEASURE_HUMI 0x05 //000 0010 1
- #define RESET 0x1e //000 1111 0
- /****************定義函數****************/
- void s_transstart(void);
- void s_connectionreset(void);
- char s_write_byte(unsigned char value);
- char s_read_byte(unsigned char ack);
- char s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode);//測量溫濕度函數
- void calc_dht90(float *p_humidity ,float *p_temperature);//溫濕度補償
- /*--------------------------------------
- ;模塊名稱:s_transstart();
- ;功 能:啟動傳輸函數
- ;-------------------------------------*/
- void s_transstart(void)
- // generates a transmission start
- {
- DATA=1; SCK=0;
- _nop_();
- SCK=1;
- _nop_();
- DATA=0;
- _nop_();
- SCK=0;
- _nop_();_nop_();_nop_();
- SCK=1;
- _nop_();
- DATA=1;
- _nop_();
- SCK=0;
- }
- /*--------------------------------------
- ;模塊名稱:s_connectionreset();
- ;功 能:連接復位函數
- ;-------------------------------------*/
- void s_connectionreset(void)
-
- {
- unsigned char i;
- DATA=1; SCK=0;
- for(i=0;i<9;i++)
- {
- SCK=1;
- SCK=0;
- }
- s_transstart();
- }
- /*--------------------------------------
- ;模塊名稱:s_write_byte();
- ;功 能:SHT1x/7x寫函數
- ;-------------------------------------*/
- char s_write_byte(unsigned char value)
- //----------------------------------------------------------------------------------
-
- {
- unsigned char i,error=0;
- for (i=0x80;i>0;i/=2)
- {
- if (i & value) DATA=1;
- else DATA=0;
- SCK=1;
- _nop_();_nop_();_nop_();
- SCK=0;
- }
- DATA=1;
- SCK=1;
- error=DATA;
- _nop_();_nop_();_nop_();
- SCK=0;
- DATA=1;
- return error;
- }
-
- /*--------------------------------------
- ;模塊名稱:s_read_byte();
- ;功 能:SHT1x/7x讀函數
- ;-------------------------------------*/
- char s_read_byte(unsigned char ack)
-
- {
- unsigned char i,val=0;
- DATA=1;
- for (i=0x80;i>0;i/=2)
- { SCK=1;
- if (DATA) val=(val | i);
- _nop_();_nop_();_nop_();
- SCK=0;
- }
- if(ack==1)DATA=0;
- else DATA=1;
- _nop_();_nop_();_nop_();
- SCK=1;
- _nop_();_nop_();_nop_();
- SCK=0;
- _nop_();_nop_();_nop_();
- DATA=1;
- return val;
- }
-
- /*--------------------------------------
- ;模塊名稱:s_measure();
- ;功 能:測量溫濕度函數
- ;-------------------------------------*/
- char s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode)
-
- {
- unsigned error=0;
- unsigned int i;
-
- s_transstart();
- switch(mode)
- {
- case TEMP : error+=s_write_byte(MEASURE_TEMP); break;
- case HUMI : error+=s_write_byte(MEASURE_HUMI); break;
- default : break;
- }
- for (i=0;i<65535;i++) if(DATA==0) break;
- if(DATA) error+=1;
- *(p_value) =s_read_byte(ACK);
- *(p_value+1)=s_read_byte(ACK);
- *p_checksum =s_read_byte(noACK);
- return error;
- }
-
- /*--------------------------------------
- ;模塊名稱:calc_dht90();
- ;功 能:溫濕度補償函數
- ;-------------------------------------*/
- void calc_dht90(float *p_humidity ,float *p_temperature)
- { const float C1=-4.0;
- const float C2=+0.0405;
- const float C3=-0.0000028;
- const float T1=+0.01;
- const float T2=+0.00008;
- float rh=*p_humidity; // rh: Humidity [Ticks] 12 Bit
- float t=*p_temperature; // t: Temperature [Ticks] 14 Bit
- float rh_lin; // rh_lin: Humidity linear
- float rh_true; // rh_true: Temperature compensated humidity
- float t_C; // t_C : Temperature [C]
- t_C=t*0.01 - 40; //calc. temperature from ticks to [C]
- rh_lin=C3*rh*rh + C2*rh + C1; //calc. humidity from ticks to [%RH]
- rh_true=(t_C-25)*(T1+T2*rh)+rh_lin; //calc. temperature compensated humidity [%RH]
- if(rh_true>100)rh_true=100;
- if(rh_true<0.1)rh_true=0.1;
- *p_temperature=t_C;
- *p_humidity=rh_true;
- }
- //*********************第二部分SHT1x/7x設置 END****************************************
- //*********主函數*****************
- void main(void)
- {
- value humi_val,temp_val;
- unsigned char error,checksum;
- unsigned int wendu,shidu;
- LCD_init();
- s_connectionreset();
- LCD_disp_str(0,1,"TE ");
- LCD_disp_str(0,2,"RH ");
- //*********初始化溫度顯示區*********
- LCD_disp_str(2,1, "TTT.T \xDF\C");
- //*********初始化濕度顯示區*********
- LCD_disp_str(2,2, "RRR.R%RH");
- delay_n10us(20000); //延時0.2s
- while(1)
- { error=0;
- error+=s_measure((unsigned char*) &humi_val.i,&checksum,HUMI);
- error+=s_measure((unsigned char*) &temp_val.i,&checksum,TEMP);
- if(error!=0) s_connectionreset();
- else
- { humi_val.f=(float)humi_val.i;
- temp_val.f=(float)temp_val.i;
- calc_dht90(&humi_val.f,&temp_val.f);
- wendu=10*temp_val.f;
- LCD_disp_char(2,1,wendu/1000+'0'); //顯示溫度百位
- LCD_disp_char(3,1,(wendu%1000)/100+'0'); //顯示溫度十位
- LCD_disp_char(4,1,(wendu%100)/10+'0'); //顯示溫度個位
- LCD_disp_char(6,1,(wendu%10)+'0'); //顯示溫度小數點后第一位
- shidu=10*humi_val.f;
- LCD_disp_char(2,2,shidu/1000+'0'); //顯示濕度百位
- LCD_disp_char(3,2,(shidu%1000)/100+'0'); //顯示濕度十位
- LCD_disp_char(4,2,(shidu%100)/10+'0'); //顯示濕度個位
- LCD_disp_char(6,2,(shidu%10)+'0'); //顯示濕度小數點后第一位
- }
- //----------wait approx. 0.8s to avoid heating up SHTxx------------------------------
- delay_n10us(80000); //延時約0.8s
- }
- }
- //end 2026-5-25 OK
復制代碼
程序 原理圖:
LCD1602溫度濕度顯示.7z
(49.4 KB, 下載次數: 0)
2026-6-9 23:27 上傳
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