使用普通IO模拟I2C与SHT10温湿度传感器交互程序

温度湿模块SHT10（转）2008-07-20 19:24/*******************************************************************************
* 标题: 易奇单片机开发板温度湿模块SHT10演示程序                              *
* 文件: SHT10_1602.c                                                         *
* 日期: 2008-1-7                                                             *
* 版本: 2.0 （在EZ-ISP51-U V2.0 + EZ-KDT-P上测试通过）                       *
* 邮箱: EaziMcu@163.com                                                      *
* 网站： http://www.EaziMCU.com                                               *
********************************************************************************
* 描述:                                                                       *
*       LCD1602显示SHT10采集的温度和湿度,温度达上限，蜂鸣器报警                *
*       引用端口：p0,p2 控制1602液晶屏，P3.6 P3.7控制温度芯片，P3.5蜂鸣器      *
********************************************************************************/
#include<reg51.h>
#include <intrins.h>
#include <stdio.h>
#include <string.h>

#define uchar unsigned char
#define uint unsigned int

#define TEMPUP 24   //温度上限, 达到该温度蜂鸣器报警
typedef unsigned char BYTE;
typedef unsigned int WORD;
typedef bit BOOL ; 
/*******************************************/
sbit buzzer = P3^5; //蜂鸣器
BOOL start;
/******************************************/

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// 1602相关控制信号及变量 
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
sbit rs = P2^0; 
sbit rw = P2^1;
sbit ep = P2^2;
BYTE dis1[16];
BYTE dis2[16];

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// SHT10 相关控制信号及变量 
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
enum {TEMP,HUMI};
sbit DATA = P3^6;
sbit SCK = P3^7;

unsigned char Tem[2];
unsigned char Hum[2];
uchar showbuf[6];
uchar error;
////////////////////////////////////////////////
//温湿度传感器地址定义
///////////////////////////////////////////////
#define noACK 0
#define ACK   1
                            //adr command r/w
#define STATUS_REG_W 0x06   //000   0011    0
#define STATUS_REG_R 0x07   //000   0011    1
#define MEASURE_TEMP 0x03   //000   0001    1
#define MEASURE_HUMI 0x05   //000   0010    1
#define RESET        0x1e   //000   1111    0