99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
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/*
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* Copyright (c) 2020 Sven Herrmann
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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_MPR_CONFIGURATION_H_
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#define ZEPHYR_DRIVERS_SENSOR_MPR_CONFIGURATION_H_
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/*
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* Pressure Range
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*
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* MIN is always 0
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*/
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#define MPR_P_MIN (0)
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#if defined(CONFIG_MPR_PRESSURE_RANGE_0001)
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#define MPR_P_MAX (1)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_01_6)
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#define MPR_P_MAX (1.6)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_02_5)
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#define MPR_P_MAX (2.5)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0015)
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#define MPR_P_MAX (15)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0025)
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#define MPR_P_MAX (25)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0030)
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#define MPR_P_MAX (30)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0060)
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#define MPR_P_MAX (60)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0100)
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#define MPR_P_MAX (100)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0160)
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#define MPR_P_MAX (160)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0250)
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#define MPR_P_MAX (250)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0400)
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#define MPR_P_MAX (400)
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#elif defined(CONFIG_MPR_PRESSURE_RANGE_0600)
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#define MPR_P_MAX (600)
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#else
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#error "MPR: Unknown pressure range."
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#endif
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/*
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* Pressure Unit
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*/
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#if defined(CONFIG_MPR_PRESSURE_UNIT_P)
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/* psi to kPa conversion factor: 6.894757 * 10^6 */
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#define MPR_CONVERSION_FACTOR (6894757)
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#elif defined(CONFIG_MPR_PRESSURE_UNIT_K)
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/* kPa to kPa conversion factor: 1 * 10^6 */
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#define MPR_CONVERSION_FACTOR (1000000)
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#elif defined(CONFIG_MPR_PRESSURE_UNIT_B)
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/* bar to kPa conversion factor: 100 * 10^6 */
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#define MPR_CONVERSION_FACTOR (100000000)
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#elif defined(CONFIG_MPR_PRESSURE_UNIT_M)
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/* mbar to kPa conversion factor: 0.1 * 10^6 */
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#define MPR_CONVERSION_FACTOR (100000)
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#else
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#error "MPR: Unknown pressure unit."
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#endif
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/*
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* Transfer function
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*/
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#if defined(CONFIG_MPR_TRANSFER_FUNCTION_A)
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#define MPR_OUTPUT_MIN (0x19999A) /* 10% of 2^24 */
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#define MPR_OUTPUT_MAX (0xE66666) /* 90% of 2^24 */
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#elif defined(CONFIG_MPR_TRANSFER_FUNCTION_B)
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#define MPR_OUTPUT_MIN (0x66666) /* 2.5% of 2^24 */
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#define MPR_OUTPUT_MAX (0x399999) /* 22.5% of 2^24 */
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#elif defined(CONFIG_MPR_TRANSFER_FUNCTION_C)
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#define MPR_OUTPUT_MIN (0x333333) /* 20% of 2^24 */
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#define MPR_OUTPUT_MAX (0xCCCCCC) /* 80% of 2^24 */
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#else
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#error "MPR: Unknown pressure reference."
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#endif
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#define MPR_OUTPUT_RANGE (MPR_OUTPUT_MAX - MPR_OUTPUT_MIN)
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#endif /* ZEPHYR_DRIVERS_SENSOR_MPR_CONFIGURATION_H_ */
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