1 /* $NetBSD: sgp40reg.h,v 1.1 2021/10/14 13:54:46 brad Exp $ */ 2 3 /* 4 * Copyright (c) 2021 Brad Spencer <brad@anduin.eldar.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #ifndef _DEV_I2C_SGP40REG_H_ 20 #define _DEV_I2C_SGP40REG_H_ 21 22 #define SGP40_TYPICAL_ADDR 0x59 23 24 /* There are three documented commands for this chip, plus one that is called a 25 soft reset. But really the soft reset is a general reset of all devices on 26 the bus, hence it is not as usable as one would hope 27 */ 28 29 #define SGP40_MEASURE_RAW 0x260f 30 #define SGP40_MEASURE_TEST 0x280e 31 #define SGP40_HEATER_OFF 0x3615 32 /* The get serial number command is documented in version 1.1 of the 33 datasheet. 34 */ 35 #define SGP40_GET_SERIAL_NUMBER 0x3682 36 /* The get featureset command is not documented in any datasheet that could 37 be found. However, it is present and used in a lot of example code. 38 It has no additional arguments aside from the command itself, and returns 39 a uint16_t for the data and a uint8_t for the crc. 40 */ 41 #define SGP40_GET_FEATURESET 0x202f 42 43 /* The results of a self test are documented as being either everything is ok, or 44 something failed. 45 */ 46 47 #define SGP40_TEST_RESULTS_ALL_PASSED 0xd400 48 #define SGP40_TEST_RESULTS_SOME_FAILED 0x4b00 49 50 #endif 51