/* $NetBSD: sgp40reg.h,v 1.1 2021/10/14 13:54:46 brad Exp $ */
/*
* Copyright (c) 2021 Brad Spencer <
[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _DEV_I2C_SGP40REG_H_
#define _DEV_I2C_SGP40REG_H_
#define SGP40_TYPICAL_ADDR 0x59
/* There are three documented commands for this chip, plus one that is called a
soft reset. But really the soft reset is a general reset of all devices on
the bus, hence it is not as usable as one would hope
*/
#define SGP40_MEASURE_RAW 0x260f
#define SGP40_MEASURE_TEST 0x280e
#define SGP40_HEATER_OFF 0x3615
/* The get serial number command is documented in version 1.1 of the
datasheet.
*/
#define SGP40_GET_SERIAL_NUMBER 0x3682
/* The get featureset command is not documented in any datasheet that could
be found. However, it is present and used in a lot of example code.
It has no additional arguments aside from the command itself, and returns
a uint16_t for the data and a uint8_t for the crc.
*/
#define SGP40_GET_FEATURESET 0x202f
/* The results of a self test are documented as being either everything is ok, or
something failed.
*/
#define SGP40_TEST_RESULTS_ALL_PASSED 0xd400
#define SGP40_TEST_RESULTS_SOME_FAILED 0x4b00
#endif
