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16f859dafd
This makes life easier when calling e.g. `saul_reg_write()` with data stored in flash. As now the signatures for reading and writing differ (in that `const` qualifier only), `saul_notsup()` is split into `saul_write_notsup()` and `saul_read_notsup()`. However, one is implemented as a symbol alias of the other, so that ROM consumption remains unchanged.
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/*
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* Copyright (C) 2020 Technische Universität Braunschweig
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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_scd30
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* @file
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* @brief SAUL adaption for Sensirion SCD30 sensor
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* @author Puhang Ding <czarsir@gmail.com>
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* @author Nishchay Agrawal <f2016088@pilani.bits-pilani.ac.in>
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* @author Jan Schlichter <schlichter@ibr.cs.tu-bs.de>
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*/
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#include "saul.h"
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#include "scd30.h"
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#include "scd30_internal.h"
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static void _float_fit(float src, phydat_t *data, uint32_t mul)
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{
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int32_t i32;
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i32 = src * mul;
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phydat_fit(data, &i32, 1);
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}
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static int _co2_read(const void *dev, phydat_t *res)
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{
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int ret = 0;
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scd30_measurement_t result;
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scd30_set_param(dev, SCD30_START, SCD30_DEF_PRESSURE);
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ret = scd30_read_triggered((scd30_t *)dev, &result);
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if (ret != 0) {
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return ret;
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}
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res->scale = -2;
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res->unit = UNIT_PPM;
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_float_fit(result.co2_concentration, res, 100);
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scd30_stop_measurements(dev);
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return 1;
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}
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static int _temp_read(const void *dev, phydat_t *res)
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{
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int ret = 0;
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scd30_measurement_t result;
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scd30_set_param(dev, SCD30_START, SCD30_DEF_PRESSURE);
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ret = scd30_read_triggered((scd30_t *)dev, &result);
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if (ret != 0) {
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return ret;
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}
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res->unit = UNIT_TEMP_C;
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res->scale = -2;
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_float_fit(result.temperature, res, 100);
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scd30_stop_measurements(dev);
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return 1;
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}
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static int _hum_read(const void *dev, phydat_t *res)
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{
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int ret = 0;
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scd30_measurement_t result;
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scd30_set_param(dev, SCD30_START, SCD30_DEF_PRESSURE);
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ret = scd30_read_triggered((scd30_t *)dev, &result);
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if (ret != 0) {
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return ret;
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}
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res->unit = UNIT_PERCENT;
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res->scale = -2;
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_float_fit(result.relative_humidity, res, 100);
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scd30_stop_measurements(dev);
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return 1;
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}
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const saul_driver_t scd30_co2_saul_driver = {
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.read = _co2_read,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_CO2,
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};
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const saul_driver_t scd30_temp_saul_driver = {
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.read = _temp_read,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_TEMP,
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};
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const saul_driver_t scd30_hum_saul_driver = {
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.read = _hum_read,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_HUM,
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};
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