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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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62
examples/c/dfrec.c
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@ -26,6 +26,8 @@
#include <signal.h>
#include "dfrec.h"
#include "upm_utilities.h"
#include "mraa.h"
bool shouldRun = true;
@ -37,40 +39,46 @@ void sig_handler(int signo)
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a DFRobot EC sensor on analog pin A0, with a ds18b20
// temperature sensor connected to UART 0, and a device index (for
// the ds1820b uart bus) of 0, and an analog reference voltage of
// 5.0.
dfrec_context sensor = dfrec_init(0, 0, 0, 5.0);
if (!sensor)
{
printf("dfrec_init() failed.\n");
return(1);
if (mraa_init() != MRAA_SUCCESS)
perror("Failed to initialize mraa\n");
return -1;
}
// Every 2 seconds, update and print values
while (shouldRun)
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a DFRobot EC sensor on analog pin A0, with a ds18b20
// temperature sensor connected to UART 0, and a device index (for
// the ds1820b uart bus) of 0, and an analog reference voltage of
// 5.0.
dfrec_context sensor = dfrec_init(0, 0, 0, 5.0);
if (!sensor)
{
dfrec_update(sensor);
printf("EC = %f ms/cm\n", dfrec_get_ec(sensor));
printf("Volts = %f, Temperature = %f C\n",
dfrec_get_volts(sensor), dfrec_get_temperature(sensor));
printf("\n");
sleep(2);
printf("dfrec_init() failed.\n");
return(1);
}
//! [Interesting]
// Every 2 seconds, update and print values
while (shouldRun)
{
dfrec_update(sensor);
printf("Exiting...\n");
printf("EC = %f ms/cm\n", dfrec_get_ec(sensor));
printf("Volts = %f, Temperature = %f C\n",
dfrec_get_volts(sensor), dfrec_get_temperature(sensor));
printf("\n");
dfrec_close(sensor);
upm_delay(2);
}
return 0;
//! [Interesting]
printf("Exiting...\n");
dfrec_close(sensor);
return 0;
}