75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
|
/**************************************************************************/
|
||
|
|
/*!
|
||
|
|
@file Adafruit_Si7021.h
|
||
|
|
@author Limor Fried (Adafruit Industries)
|
||
|
|
@license BSD (see license.txt)
|
||
|
|
|
||
|
|
This is a library for the Adafruit Si7021 breakout board
|
||
|
|
----> https://www.adafruit.com/products/3251
|
||
|
|
|
||
|
|
Adafruit invests time and resources providing this open source code,
|
||
|
|
please support Adafruit and open-source hardware by purchasing
|
||
|
|
products from Adafruit!
|
||
|
|
|
||
|
|
@section HISTORY
|
||
|
|
|
||
|
|
v1.0 - First release
|
||
|
|
*/
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
#ifndef __Si7021_H__
|
||
|
|
#define __Si7021_H__
|
||
|
|
|
||
|
|
#if ARDUINO >= 100
|
||
|
|
#include "Arduino.h"
|
||
|
|
#else
|
||
|
|
#include "WProgram.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*=========================================================================
|
||
|
|
I2C ADDRESS/BITS
|
||
|
|
-----------------------------------------------------------------------*/
|
||
|
|
#define SI7021_DEFAULT_ADDRESS (0x40)
|
||
|
|
|
||
|
|
#define SI7021_MEASRH_HOLD_CMD 0xE5
|
||
|
|
#define SI7021_MEASRH_NOHOLD_CMD 0xF5
|
||
|
|
#define SI7021_MEASTEMP_HOLD_CMD 0xE3
|
||
|
|
#define SI7021_MEASTEMP_NOHOLD_CMD 0xF3
|
||
|
|
#define SI7021_READPREVTEMP_CMD 0xE0
|
||
|
|
#define SI7021_RESET_CMD 0xFE
|
||
|
|
#define SI7021_WRITERHT_REG_CMD 0xE6
|
||
|
|
#define SI7021_READRHT_REG_CMD 0xE7
|
||
|
|
#define SI7021_WRITEHEATER_REG_CMD 0x51
|
||
|
|
#define SI7021_READHEATER_REG_CMD 0x11
|
||
|
|
#define SI7021_ID1_CMD 0xFA0F
|
||
|
|
#define SI7021_ID2_CMD 0xFCC9
|
||
|
|
#define SI7021_FIRMVERS_CMD 0x84B8
|
||
|
|
|
||
|
|
|
||
|
|
/*=========================================================================*/
|
||
|
|
|
||
|
|
class Adafruit_Si7021 {
|
||
|
|
public:
|
||
|
|
Adafruit_Si7021(void);
|
||
|
|
bool begin(void);
|
||
|
|
|
||
|
|
float readTemperature(void);
|
||
|
|
void reset(void);
|
||
|
|
void readSerialNumber(void);
|
||
|
|
float readHumidity(void);
|
||
|
|
|
||
|
|
uint32_t sernum_a, sernum_b;
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
uint8_t readRegister8(uint8_t reg);
|
||
|
|
uint16_t readRegister16(uint8_t reg);
|
||
|
|
void writeRegister8(uint8_t reg, uint8_t value);
|
||
|
|
|
||
|
|
int8_t _i2caddr;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
#endif // __Si7021_H__
|