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examples: Cleaned up C examples.

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This commit cleans up multiple items with the UPM C example source.

    * Switch from usleep and sleep to upm_delay* methods
    * Include a mraa_init and check return value prior to using sensor
    * All example mains now return
    * Added include for mraa.h and upm_utilites.h to all examples
    * Reformatted/removed tabs
    * Updated author line for the examples I wrote

Signed-off-by: Noel Eck <noel.eck@intel.com>
This commit is contained in:
Noel Eck
2016-09-19 15:45:22 -07:00
parent 2ccdc3e673
commit 324af8fc92
35 changed files with 775 additions and 482 deletions
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80
examples/c/dfrorp.c
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@ -26,6 +26,8 @@
#include <signal.h>
#include "dfrorp.h"
#include "upm_utilities.h"
#include "mraa.h"
bool shouldRun = true;
@ -37,50 +39,56 @@ void sig_handler(int signo)
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a DFRobot ORP sensor on analog pin A0 with an analog
// reference voltage of 5.0.
dfrorp_context sensor = dfrorp_init(0, 5.0);
if (!sensor)
if (mraa_init() != MRAA_SUCCESS)
{
printf("dfrorp_init() failed.\n");
return(1);
perror("Failed to initialize mraa\n");
return -1;
}
// To calibrate:
//
// Disconnect the sensor probe (but leave the sensor interface board
// connected). Then run one of the examples while holding down the
// 'calibrate' button on the device. Read the ORP value reported
// (it should be fairly small).
//
// This value is what you should supply to
// dfrorp_set_orp_cal_offset(). Then reconnect the probe to the
// interface board and you should be ready to go.
//
// DO NOT press the calibrate button on the interface board while
// the probe is attached or you can permanently damage the probe.
dfrorp_set_calibration_offset(sensor, 0.97);
signal(SIGINT, sig_handler);
// Every second, update and print values
while (shouldRun)
//! [Interesting]
// Instantiate a DFRobot ORP sensor on analog pin A0 with an analog
// reference voltage of 5.0.
dfrorp_context sensor = dfrorp_init(0, 5.0);
if (!sensor)
{
dfrorp_update(sensor);
printf("ORP = %f mV\n", dfrorp_get_orp(sensor));
sleep(1);
printf("dfrorp_init() failed.\n");
return(1);
}
//! [Interesting]
// To calibrate:
//
// Disconnect the sensor probe (but leave the sensor interface board
// connected). Then run one of the examples while holding down the
// 'calibrate' button on the device. Read the ORP value reported
// (it should be fairly small).
//
// This value is what you should supply to
// dfrorp_set_orp_cal_offset(). Then reconnect the probe to the
// interface board and you should be ready to go.
//
// DO NOT press the calibrate button on the interface board while
// the probe is attached or you can permanently damage the probe.
dfrorp_set_calibration_offset(sensor, 0.97);
printf("Exiting...\n");
// Every second, update and print values
while (shouldRun)
{
dfrorp_update(sensor);
dfrorp_close(sensor);
printf("ORP = %f mV\n", dfrorp_get_orp(sensor));
return 0;
upm_delay(1);
}
//! [Interesting]
printf("Exiting...\n");
dfrorp_close(sensor);
return 0;
}