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d2f8d4df22
Honeywell ABP2 pressure sensors series. Implement all sensors features, only supporting the SPI version of the sensor. Prepare future support for the I2C interface by emphasizing where to implement the code that will support the I2C bus version.
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/*
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* Copyright (C) 2024 CNRS, France
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup drivers_abp2
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* @{
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*
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* @file
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* @brief ABP2 adaption to the SAUL framework.
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*
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* @author David Picard <david.picard@clermont.in2p3.fr>
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* @}
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*/
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#include <string.h>
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#include <stdio.h>
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#include "saul.h"
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#include "abp2.h"
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static int read_press(const void *dev, phydat_t *press)
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{
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abp2_raw_t rawData;
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if (abp2_measure_read((abp2_t *)dev, &rawData)) {
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return -ECANCELED;
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}
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/* abp2_pressure() returns an int32_t in thousandths of user units.
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* i.e. µbar in this context.
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* Convert to tenths of millibars to fit in phydat_t.val[0],
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* a int16_t, while maintaining a 0.1 mbar resolution */
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press->val[0] = abp2_pressure((abp2_t *)dev, &rawData) / 100;
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press->scale = -4;
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press->unit = UNIT_BAR;
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return 1;
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}
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static int read_temp(const void *dev, phydat_t *temp)
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{
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abp2_raw_t rawData;
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if (abp2_measure_read((abp2_t *)dev, &rawData)) {
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return -ECANCELED;
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}
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/* abp2_temperature() returns milli-degrees Celsius */
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temp->val[0] = abp2_temperature((abp2_t *)dev, &rawData);
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temp->scale = -3;
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temp->unit = UNIT_TEMP_C;
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return 1;
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}
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const saul_driver_t abp2_saul_driver_press = {
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.read = read_press,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_PRESS,
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};
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const saul_driver_t abp2_saul_driver_temp = {
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.read = read_temp,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_TEMP
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};
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