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f72efb1daf
The Silicon Labs Si705x sensors (Si7050/1/3/4/5) are very similar to the Si7021 sensors featuring only a temperature sensor and no humidity sensor. The only difference between the Si705x is the temperature accuracy of the reading, ranging from +/- 0.1 C in the Si7051 to +/- 1 C in the Si7050. This patch adds support for this family of sensors extending the functionality of the existing si70xx driver. Following the style of other modules, this implements a pseudomodule per supported chip, adding si7050, si7051, si7053, si7054 and si7055 pseudomodules. As a minor change this patch also implements the missing si70xx_get_serial, si70xx_get_id and si70xx_get_revision functions that were declared in the si70xx.h header but implemented as private functions. The si70xx_get_id() may be relevant for the application to know at run time exactly which version of the hardware is installed. The updated test running with a Si7051 shows the following output, which seems consistent with the room temperature conditions during the test. ``` make SI70XX_VARIANT=si7051 -C tests/driver_si70xx/ all flash ``` ``` SI70XX temperature and humidity sensor test application Initializing sensor... [OK] Found SI7051 sensor, revision 32 temperature: 24.71 C temperature: 24.69 C ```
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/*
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* Copyright (C) 2016 Bas Stottelaar <basstottelaar@gmail.com>
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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_si70xx
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* @{
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*
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* @file
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* @brief SAUL adoption for Si7006/13/20/21 sensor.
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*
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* @author Bas Stottelaar <basstottelaar@gmail.com>
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*
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* @}
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*/
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#include "saul.h"
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#include "si70xx.h"
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static int read_temperature(const void *dev, phydat_t *res)
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{
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res->val[0] = (int32_t) si70xx_get_temperature((const si70xx_t *)dev);
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res->unit = UNIT_TEMP_C;
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res->scale = -2;
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return 1;
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}
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#if SI70XX_HAS_HUMIDITY_SENSOR
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static int read_relative_humidity(const void *dev, phydat_t *res)
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{
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res->val[0] = (int32_t) si70xx_get_relative_humidity((const si70xx_t *)dev);
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res->unit = UNIT_PERCENT;
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res->scale = -2;
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return 1;
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}
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#endif /* SI70XX_HAS_HUMIDITY_SENSOR */
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const saul_driver_t si70xx_temperature_saul_driver = {
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.read = read_temperature,
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.write = saul_notsup,
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.type = SAUL_SENSE_TEMP
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};
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#if SI70XX_HAS_HUMIDITY_SENSOR
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const saul_driver_t si70xx_relative_humidity_saul_driver = {
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.read = read_relative_humidity,
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.write = saul_notsup,
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.type = SAUL_SENSE_HUM
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};
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#endif /* SI70XX_HAS_HUMIDITY_SENSOR */
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