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bmp280/bme280: C port, C++ wraps C

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Some private methods (relating to calibration/compensation) are no
longer exposed.  In addition, the driver auto-detects the chip (BMP280
or BME280) and acts accordingly, rather than requiring the
specification of a chip id in the ctor.

The getHumidity() method no longer accepts an arguement representing
pressure at sea level.  A new method is provided to specify this.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
This commit is contained in:
Jon Trulson
2017-03-10 09:57:09 -07:00
parent 58cdfadf4e
commit c4a506f5a3
17 changed files with 1977 additions and 1215 deletions
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2
examples/c/CMakeLists.txt
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@ -150,6 +150,7 @@ add_example (wfs)
add_example (enc03r)
add_example (nunchuck)
add_example (bno055)
add_example (bmp280)
# Custom examples
add_custom_example (nmea_gps_i2c-example-c nmea_gps_i2c.c nmea_gps)
@ -161,3 +162,4 @@ add_custom_example (button_intr-example-c button_intr.c button)
add_custom_example (mcp2515-txrx-example-c mcp2515-txrx.c mcp2515)
add_custom_example (le910-example-c le910.c uartat)
add_custom_example (speaker_pwm-example-c speaker_pwm.c speaker)
add_custom_example (bme280-example-c bme280.c bmp280)

89
examples/c/bme280.c Normal file
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@ -0,0 +1,89 @@
/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2017 Intel Corporation.
*
* The MIT License
*
* 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 <unistd.h>
#include <stdio.h>
#include <signal.h>
#include "upm_utilities.h"
#include "bmp280.h"
bool shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main(int argc, char **argv)
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a BME280 instance using default i2c bus and
// address. We use the BMP280 driver to do all of our work, since
// the BMP280 and the BME280 are identical except for the fact
// that the BME280 includes a humidity sensor.
bmp280_context sensor = bmp280_init(BME280_DEFAULT_I2C_BUS,
BME280_DEFAULT_ADDR, -1);
if (!sensor)
{
printf("bmp280_init() failed\n");
return 1;
}
// For SPI, bus 0, you would pass -1 as the address, and a valid pin for CS:
// bmp280_init(BME280_DEFAULT_SPI_BUS,
// -1, 10)
while (shouldRun)
{
// update our values from the sensor
if (bmp280_update(sensor))
{
printf("bmp280_update() failed\n");
bmp280_close(sensor);
return 1;
}
printf("Compensation Temperature: %f C\n",
bmp280_get_temperature(sensor));
printf("Pressure: %f Pa\n", bmp280_get_pressure(sensor));
printf("Computed Altitude: %f m\n", bmp280_get_altitude(sensor));
printf("Relative Humidity: %f %%\n\n", bmp280_get_humidity(sensor));
upm_delay(1);
}
//! [Interesting]
printf("Exiting...\n");
bmp280_close(sensor);
return 0;
}

86
examples/c/bmp280.c Normal file
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@ -0,0 +1,86 @@
/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2017 Intel Corporation.
*
* The MIT License
*
* 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 <unistd.h>
#include <stdio.h>
#include <signal.h>
#include "upm_utilities.h"
#include "bmp280.h"
bool shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main(int argc, char **argv)
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a BMP280 instance using default i2c bus and address
bmp280_context sensor = bmp280_init(BMP280_DEFAULT_I2C_BUS,
BMP280_DEFAULT_ADDR, -1);
if (!sensor)
{
printf("bmp280_init() failed\n");
return 1;
}
// For SPI, bus 0, you would pass -1 as the address, and a valid pin for CS:
// bmp280_init(BMP280_DEFAULT_SPI_BUS,
// -1, 10)
while (shouldRun)
{
// update our values from the sensor
if (bmp280_update(sensor))
{
printf("bmp280_update() failed\n");
bmp280_close(sensor);
return 1;
}
printf("Compensation Temperature: %f C\n",
bmp280_get_temperature(sensor));
printf("Pressure: %f Pa\n", bmp280_get_pressure(sensor));
printf("Computed Altitude: %f m\n\n", bmp280_get_altitude(sensor));
upm_delay(1);
}
printf("Exiting...\n");
bmp280_close(sensor);
//! [Interesting]
return 0;
}