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https://github.com/RIOT-OS/RIOT.git
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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.
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
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* Copyright (C) 2017 HAW Hamburg
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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_mpl3115a2
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* @{
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*
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* @file
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* @brief MPL3115A2 adaption to the RIOT actuator/sensor interface
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*
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* @author Sebastian Meiling <s@mlng.net>
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*
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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 "log.h"
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#include "saul.h"
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#include "mpl3115a2.h"
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static int read_pressure(const void *dev, phydat_t *res)
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{
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uint8_t state;
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uint32_t pressure;
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if (mpl3115a2_read_pressure((const mpl3115a2_t *)dev,
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&pressure, &state) != MPL3115A2_OK) {
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LOG_ERROR("[SAUL] mpl3115a2_read_pressure failed!\n");
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return -1;
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}
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/* pressure values > 100000, so /100 for int16_t which matches unit hPA */
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res->val[0] = (int16_t)(pressure/100);
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res->unit = UNIT_PA;
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res->scale = 2;
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return 1;
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}
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static int read_temperature(const void *dev, phydat_t *res)
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{
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int16_t temperature;
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if (mpl3115a2_read_temp((const mpl3115a2_t *)dev, &temperature) != MPL3115A2_OK) {
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LOG_ERROR("[SAUL] mpl3115a2_read_temp failed!\n");
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return -1;
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}
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res->val[0] = temperature;
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res->unit = UNIT_TEMP_C;
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res->scale = -1;
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return 1;
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}
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const saul_driver_t mpl3115a2_pressure_saul_driver = {
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.read = read_pressure,
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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 mpl3115a2_temperature_saul_driver = {
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.read = read_temperature,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_TEMP,
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};
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