ds18b02芯片怎么在lcd1602上顯示溫度？求幫助

ID:904303 · 發表于 2021-4-12 11:03

如題

ID:904303 · 發表于 2021-4-13 09:59

#include <reg52.h>
#include <intrins.h>
#include <stdio.h>
#include "./delay/delay.h"

sbit ds = P1^0;
bit ack = 0;

sbit RS = P2^4;
sbit RW = P2^5;
sbit E  = P2^6;

#define LCDPORT P0
#define LCD_WRITE_DATA 1
#define LCD_WRITE_COM  0

void lcd1602_write(unsigned char byte,unsigned char flag)
{
      if(flag)
            {
                        RS = 1;
            }
            else
            {
                        RS = 0;
            }
            RW = 0;
            E = 1;
            LCDPORT = byte;
            delay_us(5);
            E = 0;
}

void lcd1602_dis_str(unsigned char x, unsigned char y, unsigned char *str)
{
      if((x > 15) || (y > 1))
            {
                        return ;
            }
            if(0 == y)
            {
                        lcd1602_write(0x80 + x,LCD_WRITE_COM);
            }
            else
            {
                        lcd1602_write(0x80 + 0x40 + x,LCD_WRITE_COM);
            }
            while(*str != '\0')
            {
                        lcd1602_write(*str,LCD_WRITE_DATA);
                        str++;
            }
}

void lcd_init()
{
      delay_ms(15);
      lcd1602_write(0x38,LCD_WRITE_COM);
      delay_ms(5);
            lcd1602_write(0x38,LCD_WRITE_COM);
      delay_ms(5);
            lcd1602_write(0x38,LCD_WRITE_COM);
      delay_ms(5);
            lcd1602_write(0x38,LCD_WRITE_COM);
      delay_ms(5);
            lcd1602_write(0x08,LCD_WRITE_COM);
      delay_ms(5);
            lcd1602_write(0x01,LCD_WRITE_COM);
      delay_ms(5);
      lcd1602_write(0x06,LCD_WRITE_COM);
      delay_ms(5);
            lcd1602_write(0x0c,LCD_WRITE_COM);
      delay_ms(5);
}

void ds_reset()
{
      ds = 1;
      ds = 0;
      delay_us(200);
      delay_us(200);
      ds = 1;
      delay_us(30);
      if(0 == ds)
            {
                        ack = 1;
            }
            else
            {
                        ack = 0;
            }
            delay_us(200);
            delay_us(100);
}

void ds_send_byte(unsigned char byte)
{
      unsigned char i;
      for(i = 0; i < 8; i++)
      {
                        ds = 0;
                        _nop_();
                        _nop_();
                        ds = byte & 0x01;
                        byte >>= 1;
                        delay_us(30);
                        ds = 1;
            }
            delay_us(30);
}

bit ds_read_bit()
{
      bit tmp;
      ds = 1;
      ds = 0;
      _nop_();
      _nop_();
      ds = 1;
      tmp = ds;
      delay_us(30);
      return tmp;
}

unsigned char ds_read_byte()
{
      unsigned char i,j,k;
      for(i = 0; i < 8; i++)
      {
                        j = ds_read_bit();
                        k = (j << 7) | (k >> 1);
            }
            return k;
}

void main()
{
      unsigned char a;
      unsigned int temp;
      unsigned int b;

      float wendu;

      unsigned char disbuf[20];

      lcd_init();
      while(1)
            {
                              ds_reset();
                              ds_send_byte(0xcc);
                              ds_send_byte(0x44);

                              ds_reset();
                              ds_send_byte(0xcc);
                              ds_send_byte(0xbe);
                              a = ds_read_byte();
                              b = ds_read_byte();
                              temp = (b << 8) | a;
                              wendu = (float)temp * 0.0625;
                        sprintf(disbuf,"temp is %7.3f",wendu);
                        lcd1602_dis_str(0,0,disbuf);
      }
}

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ds18b02芯片怎么在lcd1602上顯示溫度？求幫助