upm/examples/c/max30100.c
Noel Eck bd47b9ed45 max30100: Initial commit - MAX30100 pulse oximeter
* c/c++ source
    * java/js/python/c/c++ examples
    * Doc image (png)
    * Tested on Intel Edison
    * TODO: Tuning for SpO2 reading

Signed-off-by: Noel Eck <noel.eck@intel.com>
2017-01-10 11:29:30 -08:00

131 lines
3.6 KiB
C

/*
* Author: Noel Eck <noel.eck@intel.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 <unistd.h>
#include <stdio.h>
#include <signal.h>
#include "max30100.h"
#include "upm_utilities.h"
bool shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
void my_sample_handler(max30100_value sample, void* arg)
{
printf("My callback sample IR: %d R: %d\n",
sample.IR, sample.R);
}
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
max30100_context* sensor = max30100_init(0);
if (!sensor)
{
printf("max30100_init() failed\n");
return -1;
}
/* Get the temperature */
float temp;
if (max30100_get_temperature(sensor, &temp) != UPM_SUCCESS)
{
printf("max30100_get_temperature failed\n");
goto max30100_exit;
}
/* Get the version */
uint16_t version;
if (max30100_get_version(sensor, &version) != UPM_SUCCESS)
{
printf("max30100_get_version failed\n");
goto max30100_exit;
}
printf("Temperature: %f C\n", temp);
printf("Version: 0x%04x\n", version);
/* Set high-res (50 Hz, 16-bit) */
if (max30100_set_high_res(sensor, true) != UPM_SUCCESS)
{
printf("max30100_set_high_res failed\n");
goto max30100_exit;
}
/* Set to sample SpO2 */
if (max30100_set_mode(sensor, MAX30100_MODE_SPO2_EN) != UPM_SUCCESS)
{
printf("max30100_set_mode failed\n");
goto max30100_exit;
}
/* Read continuously, stepping up the LED current every second,
* us GPIO 0 as the interrupt pin */
max30100_sample_continuous(sensor, 0, false, &my_sample_handler, sensor);
for (int i = MAX30100_LED_CURRENT_0_0_MA;
i <= MAX30100_LED_CURRENT_50_0_MA && shouldRun; i++)
{
/* Toggle the LED current */
printf("Setting LED current = %d\n", i);
if ( max30100_set_current(sensor, (MAX30100_LED_CURRENT)i,
(MAX30100_LED_CURRENT)i) != UPM_SUCCESS )
{
printf("max30100_set_current failed\n");
goto max30100_exit;
}
upm_delay(1);
}
/* Read individual samples */
for (int i = 0; i < 10; i++)
{
max30100_value samp;
if (max30100_sample(sensor, &samp) != UPM_SUCCESS)
{
printf("max30100_sample failed\n");
goto max30100_exit;
}
printf("Single value IR: %d R: %d\n", samp.IR, samp.R);
}
max30100_exit:
//! [Interesting]
printf("Exiting\n");
max30100_close(sensor);
return 0;
}