sht_demo.h

盛世瑞恩公司SHT90温湿度传感器 测量温湿度的源代码 C语言 51单片机

/**********************************************************************************************
* file name: sht_demo.h
* file func: the sht90 hunmidity/temperature demo header file
* file Description:   the file is included in c file,and define some globle variables
* author:        qcx
* time:       2009/4/30
* version:    v1.1
***********************************************************************************************/
#ifndef SHT_DEMO_H
#define SHT_DEMO_H
#include <reg51.h>
typedef union
{  unsigned int i;
   float   f;
} value;              //定义数据结构类型
//-------------------------------------------------------------------------
//modul-val
//-------------------------------------------------------------------------
extern enum {TEMP,HUMI};

#define noACK  0            //无应答信号
#define ACK    1            //应答信号
                             // 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
sbit DATA = P1^1;
sbit SCK =  P1^0;
sbit m_succeed_led = P2^7;
//----------------------------------------------------------------------------------
extern char s_write_byte(unsigned char value);
extern char s_read_byte(unsigned char ack);
extern void s_transstart(void);
extern void s_connectionreset(void);
extern char s_softreset(void);
extern char s_read_statusreg(unsigned char *p_value, unsigned char *p_checksum);
extern char s_write_statusreg(unsigned char *p_value);
extern char s_measure(unsigned char *p_value,unsigned char *p_checksum,unsigned char mode);
extern void calc_sth(float *p_humidity,float *p_temperature);
extern float calc_dewpoint(float h,float t);
//---------------------------------------------------------------------------------------
#endif