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*程序功能：STC15W404AS,DHT11讀取
*AUTHOR:BY LSK
/********************定義數(shù)據(jù)*************************/
#include <STC15F2K60S2.H>
#include <intrins.h>
typedef unsigned char U8; /* defined for unsigned 8-bits integer variable 無符號(hào)8位整型變量 */
typedef signed char S8; /* defined for signed 8-bits integer variable 有符號(hào)8位整型變量 */
typedef unsigned int U16; /* defined for unsigned 16-bits integer variable 無符號(hào)16位整型變量 */
typedef signed int S16; /* defined for signed 16-bits integer variable 有符號(hào)16位整型變量 */
typedef unsigned long U32; /* defined for unsigned 32-bits integer variable 無符號(hào)32位整型變量 */
typedef signed long S32; /* defined for signed 32-bits integer variable 有符號(hào)32位整型變量 */
typedef float F32; /* single precision floating point variable (32bits) 單精度浮點(diǎn)數(shù)（32位長(zhǎng)度） */
typedef double F64; /* double precision floating point variable (64bits) 雙精度浮點(diǎn)數(shù)（64位長(zhǎng)度） */
//
#define uchar unsigned char
#define uint unsigned int
#define Data_0_time 4
sbit RT_IO = P3^3 ;//P3.3腳外部中斷1
U8 U8FLAG,k;
U8 U8count,U8temp;
U8 U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;
U8 U8T_data_H_temp,U8T_data_L_temp,U8RH_data_H_temp,U8RH_data_L_temp,U8checkdata_temp;
U8 U8comdata;
U8 outdata[5]; //定義發(fā)送的字節(jié)數(shù)
U8 indata[5];
U8 count, count_r=0;
U8 str[5]={"DATA:"};
U16 U16temp1,U16temp2;
/*---------------------------------------------*/
SendData(U8 *a)
{
outdata[0] = a[0];
outdata[1] = a[1];
outdata[2] = a[2];
outdata[3] = a[3];
outdata[4] = a[4];
count = 1;
SBUF=outdata[0];
}
/*---------------------------------------------*/
void Delay(U16 j)
{
U8 i;
for(;j>0;j--)
{
for(i=0;i<27;i++);
}
}
/*---------------------------------------------*/
void Delay_10us(void)
{
U8 i;
i--;
i--;
i--;
i--;
i--;
i--;
}
/*---------------------------------------------*/
void COM(void)
{
U8 i;
for(i=0;i<8;i++)
{
U8FLAG=2;
while((!RT_IO)&&U8FLAG++);
Delay_10us();
Delay_10us();
Delay_10us();
U8temp=0;
if(RT_IO)U8temp=1;
U8FLAG=2;
while((RT_IO)&&U8FLAG++);
//超時(shí)則跳出for循環(huán)
if(U8FLAG==1)break;
//判斷數(shù)據(jù)位是0還是1 如果高電平高過預(yù)定0高電平值則數(shù)據(jù)位為 1
U8comdata<<=1;
U8comdata|=U8temp; //0
}
}
//-----濕度讀取子程序 ------------
void RH(void)
{
//主機(jī)拉低18ms
RT_IO=0;
Delay(180);
RT_IO=1;
//總線由上拉電阻拉高 主機(jī)延時(shí)20us
Delay_10us();
Delay_10us();
Delay_10us();
Delay_10us();
//主機(jī)設(shè)為輸入 判斷從機(jī)響應(yīng)信號(hào)
RT_IO=1;
//判斷從機(jī)是否有低電平響應(yīng)信號(hào) 如不響應(yīng)則跳出，響應(yīng)則向下運(yùn)行
if(!RT_IO) //T !
{
U8FLAG=2;
//判斷從機(jī)是否發(fā)出 80us 的低電平響應(yīng)信號(hào)是否結(jié)束
while((!RT_IO)&&U8FLAG++);
U8FLAG=2;
//判斷從機(jī)是否發(fā)出 80us 的高電平，如發(fā)出則進(jìn)入數(shù)據(jù)接收狀態(tài)
while((RT_IO)&&U8FLAG++);
//數(shù)據(jù)接收狀態(tài)
COM();
U8RH_data_H_temp=U8comdata;
COM();
U8RH_data_L_temp=U8comdata;
COM();
U8T_data_H_temp=U8comdata;
COM();
U8T_data_L_temp=U8comdata;
COM();
U8checkdata_temp=U8comdata;
RT_IO=1;
//數(shù)據(jù)校驗(yàn)
U8temp=(U8T_data_H_temp+U8T_data_L_temp+U8RH_data_H_temp+U8RH_data_L_temp);
if(U8temp==U8checkdata_temp)
{
U8RH_data_H=U8RH_data_H_temp;
U8RH_data_L=U8RH_data_L_temp;
U8T_data_H=U8T_data_H_temp;
U8T_data_L=U8T_data_L_temp;
U8checkdata=U8checkdata_temp;
}
}
}
/*-------------------------------------------------*/
void RSINTR() interrupt 4 using 2
{
U8 InPut3;
if(TI==1) //發(fā)送中斷
{
TI=0;
if(count!=5) //發(fā)送完5位數(shù)據(jù)
{
SBUF= outdata[count];
count++;
}
}
if(RI==1) //接收中斷
{
InPut3=SBUF;
indata[count_r]=InPut3;
count_r++;
RI=0;
if (count_r==5)//接收完4位數(shù)據(jù)
{
//數(shù)據(jù)接收完畢處理。
count_r=0;
str[0]=indata[0];
str[1]=indata[1];
str[2]=indata[2];
str[3]=indata[3];
str[4]=indata[4];
P0=0;
}
}
}
/*----------串口發(fā)數(shù)據(jù)------------------------------------*/
void main()
{
U8 i,j;
//uchar str[6]={"RS232"};
/* 系統(tǒng)初始化 */
SCON = 0x50; //8位數(shù)據(jù),可變波特率
AUXR |= 0x01; //串口1選擇定時(shí)器2為波特率發(fā)生器
AUXR |= 0x04; //定時(shí)器2時(shí)鐘為Fosc,即1T
T2L = 0xE0; //設(shè)定定時(shí)初值
T2H = 0xFE; //設(shè)定定時(shí)初值
AUXR |= 0x10; //啟動(dòng)定時(shí)器2
ES = 1;
EA = 1; // 打開所以中斷
TI = 0;
RI = 0;
SendData(str) ; //發(fā)送到串口
Delay(1); //延時(shí)100US（12M晶振)
while(1)
{
//------------------------
//調(diào)用溫濕度讀取子程序
RH();
//串口顯示程序
//--------------------------
str[0]=U8RH_data_H;
str[1]=U8RH_data_L;
str[2]=U8T_data_H;
str[3]=U8T_data_L;
str[4]=U8checkdata;
SendData(str) ; //發(fā)送到串口
//讀取模塊數(shù)據(jù)周期不易小于 2S
Delay(10000);
}
}
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