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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/ds18b20.c
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@ -27,6 +27,8 @@
#include <signal.h>
#include "ds18b20.h"
#include "upm_utilities.h"
#include "mraa.h"
bool shouldRun = true;
@ -38,44 +40,50 @@ void sig_handler(int signo)
int main(int argc, char **argv)
{
signal(SIGINT, sig_handler);
//! [Interesting]
printf("Initializing...\n");
// Instantiate an DS18B20 instance using the uart 0
ds18b20_context sensor = ds18b20_init(0);
if (!sensor)
if (mraa_init() != MRAA_SUCCESS)
{
printf("ds18b20_init() failed.\n");
return(1);
perror("Failed to initialize mraa\n");
return -1;
}
printf("Found %d device(s)\n\n", ds18b20_devices_found(sensor));
signal(SIGINT, sig_handler);
// update and print available values every second
while (shouldRun)
//! [Interesting]
printf("Initializing...\n");
// Instantiate an DS18B20 instance using the uart 0
ds18b20_context sensor = ds18b20_init(0);
if (!sensor)
{
// update our values for all sensors
ds18b20_update(sensor, -1);
printf("ds18b20_init() failed.\n");
return(1);
}
int i;
for (i=0; i<ds18b20_devices_found(sensor); i++)
printf("Found %d device(s)\n\n", ds18b20_devices_found(sensor));
// update and print available values every second
while (shouldRun)
{
// update our values for all sensors
ds18b20_update(sensor, -1);
int i;
for (i=0; i<ds18b20_devices_found(sensor); i++)
{
printf("Device %02d: Temperature: %f C\n",
i, ds18b20_get_temperature(sensor, i));
printf("Device %02d: Temperature: %f C\n",
i, ds18b20_get_temperature(sensor, i));
}
printf("\n");
printf("\n");
sleep(2);
upm_delay(2);
}
printf("Exiting...\n");
printf("Exiting...\n");
ds18b20_close(sensor);
//! [Interesting]
ds18b20_close(sensor);
//! [Interesting]
return 0;
return 0;
}