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本帖最后由 lx490004 于 2017-3-2 20:09 編輯
這是小弟的程序，在開發(fā)板上試的程序，89c52rc
不知道為什么溫濕度固定顯示15
下面是程序，麻煩各位了
#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
typedef bit BOOL;
sbit io = P3^0;
sbit rs = P1^0;
sbit rw = P1^1;
sbit ep = P2^5;
uchar data_byte;
uchar RH,RL,TH,TL;
/********延時模塊***********/
void delay(uchar ms)
{ // 延時子程序
uchar i;
while(ms--)
{
for(i = 0;i<250;i++);
}
}
void delay1()//延時10us
{
uchar i;
i--;
i--;
i--;
i--;
i--;
i--;
}
void longdelay(uchar s) //長延時
{
while(s--)
{
delay(60);
}
}
BOOL lcd_bz()//測試LCD忙碌狀態(tài)
{
BOOL result;
rs = 0;
rw = 1;
ep = 1;
result = (BOOL)(P0 & 0x80);
ep = 0;
return result;
}
void write_cmd(uchar cmd)// 寫指令
{
while(lcd_bz());
rs = 0;
rw = 0;
ep = 0;
P0 = cmd;
ep = 1;
ep = 0;
}
void write_addr(uchar addr)//寫地址
{
write_cmd(addr|0x80);
}
void write_byte(uchar dat)//寫字節(jié)
{
while(lcd_bz());
rs = 1;
rw = 0;
ep = 0;
P0 = dat;
ep = 1;
ep = 0;
}
void lcd_init()// 初始化
{
write_cmd(0x38);
delay(1);
write_cmd(0x08);
delay(1);
write_cmd(0x01);
delay(1);
write_cmd(0x06);
delay(1);
write_cmd(0x0c);
delay(1);
}
void display(uchar addr, uchar q)//在某一地址上顯示一字節(jié)
{
delay(10);
write_addr(addr);
write_byte(q);
longdelay(2);
}
void start()//開始信號
{
io=1;
delay1();
io=0;
delay(20);//>18ms
io=1;
delay1();//20-40us
delay1();
delay1();
delay1();
delay1();
}
uchar receive_byte()//接收一個字節(jié)
{
uchar i,temp,count;
for(i=0;i<8;i++)
{
count=2;
while((!io)&&count++)//等待50us低電平結(jié)束
temp=0;
delay1();
delay1();
delay1();
delay1();
if(io==1)
temp=1;
count=2;
while((io)&&count++);
if(count==1)break;
data_byte<<=1;
data_byte|=temp;
}
return data_byte;
}
void receive()//接收數(shù)據(jù)
{
uchar T_H,T_L,R_H,R_L,check,num_check;
uchar count;
start();//開始信號
io=1;
if(!io)//讀取DHT11響應(yīng)信號
{
count=2;
while((!io)&&count++);//DHT11高電平80us是否結(jié)束
count=2;
while((io)&&count++);
R_H=receive_byte();
R_L=receive_byte();
T_H=receive_byte();
T_L=receive_byte();
check=receive_byte();
io=0;//拉低延時50us
delay1();
delay1();
delay1();
delay1();
delay1();
io=1;
num_check=R_H+R_L+T_H+T_L;
if(num_check=check)
{
RH=R_H;
RL=R_L;
TH=T_H;
TL=T_L;
check=num_check;
}
}
}
void main()
{
lcd_init();
delay(10);
while(1)
{
receive();
delay(100);
display(0x00,'R');
display(0x01,':');
display(0x02,RH/10+0x30);
display(0x03,RH%10+0x30);
display(0x04,'%');
display(0x40,'T');
display(0x41,':');
display(0x42,TH/10+0x30);
display(0x43,TH%10+0x30);
display(0x44,0xdf);
display(0x45,0x43);
}
}
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