做了一个DHT11温湿度传感器的1602的显示,用8051做的,换成60s2的片子以后不行了...
我想应该是机械周期的事吧,应该怎么改呢,大家有遇到的帮帮我、、、这是简单的显示程序:
#include<STC12C5A60S2.h>
#define uchar unsigned char
#define uint unsigned int
/*引脚定义*/
uchar code table[]="0123456789";
sbit en=P2^1;
sbit rs=P2^0;
sbit io=P1^1;
/*定义变量*/
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;
/*延时程序*/
void delayms(unsigned int xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
/*10微妙延时程序*/
void delay1()
{
unsigned char i;
for(i=0; i<3; i++);
}
/*写命令*/
void command(uchar com)
{
rs=0;
P0=com;
en=1;
delayms(5);
en=0;
delayms(5);
}
/*写数据*/
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);//设置16x2显示,5x7点阵,8位数据接口
command(0x0c);//设置开显示,不显示光标
command(0x06);//写一个字符后地址指针加一
command(0x01);//显示清零,数据指针清零
}
/**********************DHT11模块**********************/
uchar receive_byte()//接收一个字节
{
uchar i,temp;
for(i=0;i<8; i++)
{
count = 2;
while((!io)&&count++)//等待50us低电平结束并防止死循环
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开始函数*/
void read_io()//开始信号读数据并校验
{
io = 0;
delayms(18);//主机拉低18ms
io=1;//DATA总线由上拉电阻拉高 主机延时20us
delay1();
delay1();
delay1();
delay1();
io = 1;//主机设置为输入高电平判断从机响应信号
if(!io)
{
count = 2;
while((!io)&&count++);//判断DHT11发出80us低电平响应信号是否结束
count = 2;
while(io && count++);//判断DHT11拉高总线80us高电平是否结束
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);//数据校验
if(num==CK_temp)
{
RH_data=RH_temp;
RL_data=RL_temp;
TH_data=TH_temp;
TL_data=TL_temp;
CK_data=CK_temp;
}
}
//湿度整数部分
SHISHI = RH_data/10;
SHIGE = RH_data%10;
//温度整数部分
WENSHI =(char) TH_data/10;
WENGE = (char) TH_data%10;
}
/*主函数*/
void main()
{
P4SW=0x70;
init();
while(1)
{
read_io();
command(0x80);
information(table[WENSHI]);
command(0x81);
information(table[WENGE]);
}
}
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