做了一個(gè)DHT11溫濕度傳感器的1602的顯示，用8051做的，換成60s2的片子以后不行了...
我想應(yīng)該是機(jī)械周期的事吧，應(yīng)該怎么改呢，大家有遇到的幫幫我、、、這是簡(jiǎn)單的顯示程序：
#include<STC12C5A60S2.h>
#define uchar unsigned char
#define uint unsigned int
/*引腳定義*/
uchar code table[]="0123456789";
sbit en=P2^1;
sbit rs=P2^0;
sbit io=P1^1;
/*定義變量*/
uchar data_byte=0,count,SHISHI,SHIGE,WENSHI,WENGE;
uint TH_data,TL_data,RH_data,RL_data,CK_data;
uint TH_temp,TL_temp,RH_temp,RL_temp,CK_temp;
uchar num;
/*延時(shí)程序*/
void delayms(unsigned int xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
/*10微妙延時(shí)程序*/
void delay1()
{
unsigned char i;
for(i=0; i<3; i++);
}
/*寫命令*/
void command(uchar com)
{
rs=0;
P0=com;
en=1;
delayms(5);
en=0;
delayms(5);
}
/*寫數(shù)據(jù)*/
void information(uchar date)
{
rs=1;
P0=date;
en=1;
delayms(5);
en=0;
delayms(5);
}
/*初始化*/
void init()
{
en=0;
command(0x38);//設(shè)置16x2顯示，5x7點(diǎn)陣，8位數(shù)據(jù)接口
command(0x0c);//設(shè)置開顯示，不顯示光標(biāo)
command(0x06);//寫一個(gè)字符后地址指針加一
command(0x01);//顯示清零，數(shù)據(jù)指針清零
}
/**********************DHT11模塊**********************/
uchar receive_byte()//接收一個(gè)字節(jié)
{
uchar i,temp;
for(i=0;i<8; i++)
{
count = 2;
while((!io)&&count++)//等待50us低電平結(jié)束并防止死循環(huán)
temp = 0;
delay1();
delay1();
delay1();
if (io==1)
{
temp = 1;
count = 2;
while(io && count++);
}
else
temp = 0;
data_byte<<=1;
data_byte|=temp;
}
return (data_byte);
}
/*DHT11開始函數(shù)*/
void read_io()//開始信號(hào)讀數(shù)據(jù)并校驗(yàn)
{
io = 0;
delayms(18);//主機(jī)拉低18ms
io=1;//DATA總線由上拉電阻拉高 主機(jī)延時(shí)20us
delay1();
delay1();
delay1();
delay1();
io = 1;//主機(jī)設(shè)置為輸入高電平判斷從機(jī)響應(yīng)信號(hào)
if(!io)
{
count = 2;
while((!io)&&count++);//判斷DHT11發(fā)出80us低電平響應(yīng)信號(hào)是否結(jié)束
count = 2;
while(io && count++);//判斷DHT11拉高總線80us高電平是否結(jié)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);//數(shù)據(jù)校驗(yàn)
if(num==CK_temp)
{
RH_data=RH_temp;
RL_data=RL_temp;
TH_data=TH_temp;
TL_data=TL_temp;
CK_data=CK_temp;
}
}
//濕度整數(shù)部分
SHISHI = RH_data/10;
SHIGE = RH_data%10;
//溫度整數(shù)部分
WENSHI =(char) TH_data/10;
WENGE = (char) TH_data%10;
}
/*主函數(shù)*/
void main()
{
P4SW=0x70;
init();
while(1)
{
read_io();
command(0x80);
information(table[WENSHI]);
command(0x81);
information(table[WENGE]);
}
}
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