DHT11和LCD1602顯示屏顯示溫濕度測量儀

ID:1142651 · 發(fā)表于 2025-1-7 13:29

#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit Data = P1 ^ 6;

uchar rec_dat[9];

sbit lcdrs = P2 ^ 0;
sbit lcdrw = P2 ^ 1;
sbit lcden = P2 ^ 2;

sbit addr=P2^4;
sbit reducer=P2^5;
sbit addt=P2^6;
sbit reducet=P2^7;

int ET = 0, ER = 0;

uchar R_H, R_L, T_H, T_L, RH, RL, TH, TL;

void delay(uint n)
{
  uint x, y;
  for (x = n; x > 0; x--)
for (y = 110; y > 0; y--)
   ;
}
void write_com(uchar com)
{
  lcdrs = 0;
  P0 = com;
  delay(5);
  lcden = 1;
  delay(5);
  lcden = 0;
}
void write_dat(uchar dat)
{
  lcdrs = 1;
  P0 = dat;
  delay(5);
  lcden = 1;
  delay(5);
  lcden = 0;
}
void init_lcd()
{
  lcden = 0;
  lcdrw = 0;
  write_com(0x38);
  write_com(0x0c);
  write_com(0x06);
  write_com(0x01);
}
void DHT11_delay_us(uchar n)
{
  while (--n)
;
}
void DHT11_delay_ms(uint z)
{
  uint i, j;
  for (i = z; i > 0; i--)
for (j = 110; j > 0; j--)
   ;
}
void DHT11_start()
{
  Data = 1;
  DHT11_delay_us(2);
  Data = 0;
  DHT11_delay_ms(30);
  Data = 1;
  DHT11_delay_us(30);
}
uchar DHT11_rec_byte()
{
  uchar i, dat = 0;
  for (i = 0; i < 8; i++)
  {
while (!Data)
   ;
DHT11_delay_us(8);
dat <<= 1;
if (Data == 1)
   dat += 1;
while (Data)
   ;
  }
  return dat;
}
void DHT11_receive()
{
  uchar revise;
  DHT11_start();
  if (Data == 0)
  {
while (Data == 0)
   ;
DHT11_delay_us(40);
R_H = DHT11_rec_byte();
R_L = DHT11_rec_byte();
T_H = DHT11_rec_byte();
T_L = DHT11_rec_byte();
revise = DHT11_rec_byte();
DHT11_delay_us(25);
if ((R_H + R_L + T_H + T_L) == revise)
{
   RH = R_H;
   RL = R_L;
   TH = T_H;
   TL = T_L;
}
rec_dat[0]='0'+((RH+ER)/10);
      rec_dat[1]='0'+((RH+ER)%10);
      rec_dat[2]='.';
      rec_dat[3]='0'+(RL/10);
      rec_dat[4]='%';
rec_dat[5]=' ';
      rec_dat[6]='0'+((TH+ET)/10);
      rec_dat[7]='0'+((TH+ET)%10);
rec_dat[8]='.';
rec_dat[9]='0'+(TL/10);
  }
}

void main()
{
  uchar i;
  init_lcd();
  while (1)
  {

if (addr == 0)
{
   delay(30);
   ER += 1;
}
if (reducer == 0)
{
   delay(30);
   ER -= 1;
}
if (addt == 0)
{
   delay(30);
   ET += 1;
}
if (reducet == 0)
{
   delay(30);
   ET -= 1;
}

DHT11_delay_ms(100);
DHT11_receive();
write_com(0x80);

   for(i=0;i<=9;i++)
   write_dat(rec_dat[i]);
write_dat(0xdf);
write_dat('C');
  }
}

ID:404454 · 發(fā)表于 2025-4-3 17:48

有壇友做過成功的嗎？我看程序顯示部分的都看不明白，也想做個當擺設。

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