110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
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* Copyright (c) 2018 Alexander Wachter.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_SENSOR_ENS210_ENS210_H_
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#define ZEPHYR_DRIVERS_SENSOR_ENS210_ENS210_H_
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#include <device.h>
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#include <drivers/gpio.h>
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#include <sys/util.h>
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/* Registers */
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#define ENS210_REG_PART_ID 0x00
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#define ENS210_REG_UID 0x04
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#define ENS210_REG_SYS_CTRL 0x10
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#define ENS210_REG_SYS_STAT 0x11
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#define ENS210_REG_SENS_RUN 0x21
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#define ENS210_REG_SENS_START 0x22
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#define ENS210_REG_SENS_STOP 0x23
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#define ENS210_REG_SENS_STAT 0x24
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#define ENS210_REG_T_VAL 0x30
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#define ENS210_REG_H_VAL 0x33
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#define ENS210_PART_ID 0x0210
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#if defined CONFIG_ENS210_TEMPERATURE_OFF
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#define ENS210_T_RUN 0
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#define ENS210_T_START 0
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#elif defined CONFIG_ENS210_TEMPERATURE_SINGLE
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#define ENS210_T_RUN 0
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#define ENS210_T_START 1
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#elif defined CONFIG_ENS210_TEMPERATURE_CONTINUOUS
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#define ENS210_T_RUN 1
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#define ENS210_T_START 1
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#endif
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#if defined CONFIG_ENS210_HUMIDITY_OFF
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#define ENS210_H_RUN 0
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#define ENS210_H_START 0
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#elif defined CONFIG_ENS210_HUMIDITY_SINGLE
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#define ENS210_H_RUN 0
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#define ENS210_H_START 1
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#elif defined CONFIG_ENS210_HUMIDITY_CONTINUOUS
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#define ENS210_H_RUN 1
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#define ENS210_H_START 1
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#endif
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/*
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* Polynomial
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* 0b 1000 1001 ~ x^7+x^3+x^0
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* 0x 8 9
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*/
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#define ENS210_CRC7_WIDTH 7
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#define ENS210_CRC7_POLY 0x89
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#define ENS210_CRC7_IVEC ((1UL << ENS210_CRC7_WIDTH) - 1)
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#define ENS210_CRC7_DATA_WIDTH 17
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#define ENS210_CRC7_DATA_MASK ((1UL << ENS210_CRC7_DATA_WIDTH) - 1)
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#define ENS210_CRC7_DATA_MSB (1UL << (ENS210_CRC7_DATA_WIDTH - 1))
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struct ens210_value_data {
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uint16_t val;
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uint8_t valid : 1;
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uint8_t crc7 : 7;
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} __packed;
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struct ens210_sys_ctrl {
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uint8_t low_power : 1;
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uint8_t reserved : 6;
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uint8_t reset : 1;
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} __packed;
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struct ens210_sys_stat {
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uint8_t sys_active : 1;
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uint8_t reserved : 7;
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} __packed;
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struct ens210_sens_run {
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uint8_t t_run : 1;
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uint8_t h_run : 1;
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uint8_t reserved : 6;
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} __packed;
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struct ens210_sens_start {
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uint8_t t_start : 1;
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uint8_t h_start : 1;
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uint8_t reserved : 6;
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} __packed;
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struct ens210_sens_stop {
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uint8_t t_stop : 1;
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uint8_t h_stop : 1;
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uint8_t reserved : 6;
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} __packed;
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struct ens210_sens_stat {
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uint8_t t_stat : 1;
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uint8_t h_stat : 1;
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uint8_t reserved : 6;
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} __packed;
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struct ens210_data {
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struct device *i2c;
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struct ens210_value_data temp;
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struct ens210_value_data humidity;
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};
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#endif /* ZEPHYR_DRIVERS_SENSOR_ENS210_ENS210_H_ */
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