mirror of
https://github.com/eclipse/upm.git
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lm35: add C driver and example; FTI; C++ wraps C
Signed-off-by: Jon Trulson <jtrulson@ics.com>
This commit is contained in:
parent
cbf94414e2
commit
8624a07b77
@ -124,6 +124,7 @@ add_example (yg1006)
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add_example (biss0001)
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add_example (bmi160)
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add_example (jhd1313m1)
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add_example (lm35)
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# Custom examples
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add_custom_example (nmea_gps_i2c-example-c nmea_gps_i2c.c nmea_gps)
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72
examples/c/lm35.c
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72
examples/c/lm35.c
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@ -0,0 +1,72 @@
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <signal.h>
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#include "lm35.h"
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#include "upm_utilities.h"
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bool shouldRun = true;
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void sig_handler(int signo)
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{
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if (signo == SIGINT)
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shouldRun = false;
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}
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int main()
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{
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signal(SIGINT, sig_handler);
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//! [Interesting]
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// Instantiate a LM35 on analog pin A0, with a default analog
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// reference voltage of 5.0
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lm35_context sensor = lm35_init(0, 5.0);
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// Every half second, sample the sensor and output the temperature
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while (shouldRun)
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{
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float temp;
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if (lm35_get_temperature(sensor, &temp) != UPM_SUCCESS)
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{
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printf("lm35_get_temperature failed\n");
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return 1;
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}
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printf("Temperature: %3.2f C\n", temp);
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upm_delay_ms(500);
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}
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//! [Interesting]
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printf("Exiting\n");
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lm35_close(sensor);
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return 0;
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}
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@ -1,5 +1,9 @@
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set (libname "lm35")
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set (libdescription "upm DFRobot LM35 temperature sensor")
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set (module_src ${libname}.cxx)
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set (module_hpp ${libname}.hpp)
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upm_module_init()
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upm_mixed_module_init (NAME lm35
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DESCRIPTION "LM35 Temperature Sensor"
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C_HDR lm35.h
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C_SRC lm35.c
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CPP_HDR lm35.hpp
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CPP_SRC lm35.cxx
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FTI_SRC lm35_fti.c
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CPP_WRAPS_C
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REQUIRES mraa)
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106
src/lm35/lm35.c
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106
src/lm35/lm35.c
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@ -0,0 +1,106 @@
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <assert.h>
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#include "lm35.h"
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lm35_context lm35_init(int pin, float aref)
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{
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lm35_context dev =
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(lm35_context)malloc(sizeof(struct _lm35_context));
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if (!dev)
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return NULL;
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// make sure MRAA is initialized
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int mraa_rv;
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if ((mraa_rv = mraa_init()) != MRAA_SUCCESS)
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{
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printf("%s: mraa_init() failed (%d).\n", __FUNCTION__, mraa_rv);
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lm35_close(dev);
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return NULL;
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}
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// initialize the MRAA context
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if (!(dev->aio = mraa_aio_init(pin)))
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{
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printf("%s: mraa_aio_init failed.\n", __FUNCTION__);
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lm35_close(dev);
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return NULL;
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}
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dev->ares = (float)((1 << mraa_aio_get_bit(dev->aio)) - 1);
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dev->aref = aref;
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dev->scale = 1.0;
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dev->offset = 0.0;
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return dev;
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}
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void lm35_close(lm35_context dev)
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{
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assert(dev != NULL);
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if (dev->aio)
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mraa_aio_close(dev->aio);
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free(dev);
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}
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upm_result_t lm35_get_temperature(const lm35_context dev, float *temperature)
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{
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assert(dev != NULL);
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int val = mraa_aio_read(dev->aio);
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if (val < 0)
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{
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printf("%s: mraa_aio_read() failed\n", __FUNCTION__);
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*temperature = 0.0;
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return UPM_ERROR_OPERATION_FAILED;
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}
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// convert to mV
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float mV = ((float)val * (dev->aref / dev->ares) * 1000.0);
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// 10mV/degree C
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*temperature = mV / 10.0;
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*temperature = *temperature * dev->scale + (dev->offset * dev->scale);
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return UPM_SUCCESS;
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}
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void lm35_set_offset(const lm35_context dev, float offset)
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{
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assert(dev != NULL);
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dev->offset = offset;
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}
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void lm35_set_scale(const lm35_context dev, float scale)
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{
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assert(dev != NULL);
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dev->scale = scale;
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}
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@ -1,6 +1,6 @@
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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* Copyright (c) 2015-2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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@ -23,29 +23,43 @@
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*/
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#include <iostream>
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#include <stdexcept>
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#include "lm35.hpp"
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using namespace std;
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using namespace upm;
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LM35::LM35(int pin, float aref) :
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m_aio(pin)
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m_lm35(lm35_init(pin, aref))
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{
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m_aRes = m_aio.getBit();
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m_aref = aref;
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if (!m_lm35)
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throw std::runtime_error(string(__FUNCTION__)
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+ ": lm35_init() failed");
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}
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LM35::~LM35()
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{
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lm35_close(m_lm35);
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}
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float LM35::getTemperature()
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{
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int val = m_aio.read();
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float temp;
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upm_result_t rv = lm35_get_temperature(m_lm35, &temp);
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// convert to mV
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float temp = (float(val) * (m_aref / float(1 << m_aRes))) * 1000.0;
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if (rv)
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throw std::runtime_error(string(__FUNCTION__)
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+ ": lm35_get_temperature() failed");
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// 10mV/degree C
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return(temp / 10.0);
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return temp;
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}
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void LM35::setScale(float scale)
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{
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lm35_set_scale(m_lm35, scale);
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}
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void LM35::setOffset(float offset)
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{
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lm35_set_offset(m_lm35, offset);
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}
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104
src/lm35/lm35.h
Normal file
104
src/lm35/lm35.h
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@ -0,0 +1,104 @@
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <stdlib.h>
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#include <stdio.h>
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#include <upm.h>
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#include <mraa/aio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @file lm35.h
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* @library lm35
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* @brief C API for the LM35 Temperature Sensor
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*
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* @include lm35.c
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*/
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/**
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* device context
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*/
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typedef struct _lm35_context
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{
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mraa_aio_context aio;
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// ADC reference voltage
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float aref;
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// ADC resolution
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float ares;
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// scale and offset
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float scale;
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float offset;
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} *lm35_context;
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/**
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* LM35 initialization.
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*
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* @param pin Analog pin to use
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* @param aref Analog reference voltage
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*/
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lm35_context lm35_init(int pin, float aref);
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/**
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* LM35 close.
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*/
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void lm35_close(lm35_context dev);
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/**
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* Returns the temperature in degrees Celsius
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*
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* @param temperature A pointer to a float that will contain the
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* measured temperature.
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* @return UPM status
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*/
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upm_result_t lm35_get_temperature(const lm35_context dev,
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float *temperature);
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/**
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* Set sensor offset. This offset is applied to the return values
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* before scaling. Default is 0.0.
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*
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* @param dev sensor context pointer
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* @param offset Offset to apply.
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*/
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void lm35_set_offset(const lm35_context dev, float offset);
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/**
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* Set sensor scale. This scale is applied to the return values
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* before the offset is applied. Default is 1.0.
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*
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* @param dev sensor context pointer
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* @param scale Scale to apply.
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*/
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void lm35_set_scale(const lm35_context dev, float scale);
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#ifdef __cplusplus
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}
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#endif
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@ -1,6 +1,6 @@
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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* Copyright (c) 2015-2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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@ -25,70 +25,83 @@
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#include <iostream>
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#include <string>
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#include <mraa/aio.hpp>
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#include "lm35.h"
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namespace upm {
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/**
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* @brief DFRobot LM35 Linear Temperature Sensor
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* @defgroup lm35 libupm-lm35
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* @ingroup dfrobot analog temp
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*/
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/**
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* @library lm35
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* @sensor lm35
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* @comname DFRobot LM35 Linear Temperature Sensor
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* @altname LM35
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* @type temp
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* @man dfrobot
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* @web http://www.dfrobot.com/index.php?route=product/product&product_id=76
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* @con analog
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*
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* @brief API for the DFRobot LM35 Linear Temperature Sensor
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*
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* This sensor returns an analog voltage proportional to the
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* temperature of the ambient environment.
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*
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* It has a range of 2C to 150C.
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*
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* This driver was developed using the DFRobot LM35 Linear
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* Temperature Sensor
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*
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* @image html lm35.jpg
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* @snippet lm35.cxx Interesting
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*/
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class LM35 {
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public:
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/**
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* @brief DFRobot LM35 Linear Temperature Sensor
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* @defgroup lm35 libupm-lm35
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* @ingroup dfrobot analog temp
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*/
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/**
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* LM35 constructor
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* @library lm35
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* @sensor lm35
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* @comname DFRobot LM35 Linear Temperature Sensor
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* @altname LM35
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* @type temp
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* @man dfrobot
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* @web http://www.dfrobot.com/index.php?route=product/product&product_id=76
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* @con analog
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*
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* @param pin Analog pin to use
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* @param aref Analog reference voltage; default is 5.0 V
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*/
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LM35(int pin, float aref=5.0);
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/**
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* LM35 destructor
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*/
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~LM35();
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/**
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* Returns the temperature in degrees Celsius
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* @brief API for the DFRobot LM35 Linear Temperature Sensor
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*
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* @return The Temperature in degrees Celsius
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* This sensor returns an analog voltage proportional to the
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* temperature of the ambient environment.
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*
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* It has a range of 2C to 150C.
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*
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* This driver was developed using the DFRobot LM35 Linear
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* Temperature Sensor
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*
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* @image html lm35.jpg
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* @snippet lm35.cxx Interesting
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*/
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float getTemperature();
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protected:
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mraa::Aio m_aio;
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class LM35 {
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public:
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private:
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float m_aref;
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// ADC resolution
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int m_aRes;
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};
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/**
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* LM35 constructor
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*
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* @param pin Analog pin to use
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* @param aref Analog reference voltage; default is 5.0 V
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*/
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LM35(int pin, float aref=5.0);
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/**
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* LM35 destructor
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*/
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~LM35();
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/**
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* Returns the temperature in degrees Celsius
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*
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* @return The Temperature in degrees Celsius
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*/
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float getTemperature();
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/**
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* Set sensor scale. This scale is applied to the return values
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* before the offset is applied. Default is 1.0.
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*
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* @param scale Scale to apply.
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*/
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void setScale(float scale);
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/**
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* Set sensor offset. This offset is applied to the return values
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* before scaling. Default is 0.0.
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*
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* @param offset Offset to apply.
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*/
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void setOffset(float offset);
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protected:
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lm35_context m_lm35;
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private:
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};
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}
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|
135
src/lm35/lm35_fti.c
Normal file
135
src/lm35/lm35_fti.c
Normal file
@ -0,0 +1,135 @@
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/*
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||||
* Author: Jon Trulson <jtrulson@ics.com>
|
||||
* Copyright (c) 2016 Intel Corporation.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining
|
||||
* a copy of this software and associated documentation files (the
|
||||
* "Software"), to deal in the Software without restriction, including
|
||||
* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sublicense, and/or sell copies of the Software, and to
|
||||
* permit persons to whom the Software is furnished to do so, subject to
|
||||
* the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be
|
||||
* included in all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
||||
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
||||
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
||||
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include "lm35.h"
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "upm_fti.h"
|
||||
#include "upm_sensor.h"
|
||||
|
||||
/**
|
||||
* This file implements the Function Table Interface (FTI) for this sensor
|
||||
*/
|
||||
|
||||
const char upm_lm35_name[] = "LM35";
|
||||
const char upm_lm35_description[] = "LM35 Analog Temperature Sensor";
|
||||
const upm_protocol_t upm_lm35_protocol[] = {UPM_ANALOG};
|
||||
const upm_sensor_t upm_lm35_category[] = {UPM_TEMPERATURE};
|
||||
|
||||
// forward declarations
|
||||
const upm_sensor_descriptor_t upm_lm35_get_descriptor();
|
||||
const void* upm_lm35_get_ft(upm_sensor_t sensor_type);
|
||||
upm_result_t upm_lm35_get_value(void* dev, float* tempval,
|
||||
upm_temperature_u unit);
|
||||
void* upm_lm35_init_name();
|
||||
void upm_lm35_close(void* dev);
|
||||
upm_result_t upm_lm35_set_offset(void *dev, float offset);
|
||||
upm_result_t upm_lm35_set_scale(void *dev, float scale);
|
||||
|
||||
const upm_sensor_descriptor_t upm_lm35_get_descriptor()
|
||||
{
|
||||
upm_sensor_descriptor_t usd;
|
||||
usd.name = upm_lm35_name;
|
||||
usd.description = upm_lm35_description;
|
||||
usd.protocol_size = 1;
|
||||
usd.protocol = upm_lm35_protocol;
|
||||
usd.category_size = 1;
|
||||
usd.category = upm_lm35_category;
|
||||
return usd;
|
||||
}
|
||||
|
||||
static const upm_sensor_ft ft =
|
||||
{
|
||||
.upm_sensor_init_name = &upm_lm35_init_name,
|
||||
.upm_sensor_close = &upm_lm35_close,
|
||||
.upm_sensor_get_descriptor = &upm_lm35_get_descriptor
|
||||
};
|
||||
|
||||
static const upm_temperature_ft tft =
|
||||
{
|
||||
.upm_temperature_get_value = &upm_lm35_get_value,
|
||||
.upm_temperature_set_scale = &upm_lm35_set_scale,
|
||||
.upm_temperature_set_offset = &upm_lm35_set_offset,
|
||||
};
|
||||
|
||||
const void* upm_lm35_get_ft(upm_sensor_t sensor_type)
|
||||
{
|
||||
if (sensor_type == UPM_SENSOR)
|
||||
return &ft;
|
||||
|
||||
if (sensor_type == UPM_TEMPERATURE)
|
||||
return &tft;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void* upm_lm35_init_name()
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void upm_lm35_close(void* dev)
|
||||
{
|
||||
lm35_close((lm35_context)dev);
|
||||
}
|
||||
|
||||
upm_result_t upm_lm35_set_offset(void *dev, float offset)
|
||||
{
|
||||
lm35_set_offset((lm35_context)dev, offset);
|
||||
return UPM_SUCCESS;
|
||||
}
|
||||
upm_result_t upm_lm35_set_scale(void *dev, float scale)
|
||||
{
|
||||
lm35_set_scale((lm35_context)dev, scale);
|
||||
return UPM_SUCCESS;
|
||||
}
|
||||
|
||||
upm_result_t upm_lm35_get_value(void* dev, float* tempval,
|
||||
upm_temperature_u unit)
|
||||
{
|
||||
float temp = 0.0;
|
||||
upm_result_t rv = lm35_get_temperature((lm35_context)dev, &temp);
|
||||
|
||||
if (rv != UPM_SUCCESS)
|
||||
return rv;
|
||||
|
||||
switch (unit)
|
||||
{
|
||||
case CELSIUS:
|
||||
*tempval = temp;
|
||||
return UPM_SUCCESS;
|
||||
|
||||
case KELVIN:
|
||||
*tempval = temp + 273.15;
|
||||
return UPM_SUCCESS;
|
||||
|
||||
case FAHRENHEIT:
|
||||
*tempval = temp * (9.0/5.0) + 32.0;
|
||||
return UPM_SUCCESS;
|
||||
}
|
||||
|
||||
return UPM_ERROR_INVALID_PARAMETER;
|
||||
}
|
Loading…
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Reference in New Issue
Block a user