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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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39
examples/c/mpr121.c
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@ -7,24 +7,33 @@
#include <unistd.h>
#include "mpr121.h"
#include "upm_utilities.h"
#include "mraa.h"
int main()
{
mpr121_context dev = mpr121_init(MPR121_I2C_BUS, MPR121_DEFAULT_I2C_ADDR);
if (mraa_init() != MRAA_SUCCESS)
{
perror("Failed to initialize mraa\n");
return -1;
}
if(mpr121_config_an3944(dev) != UPM_SUCCESS){
printf("unable to configure device\n");
}
uint32_t states;
while(1){
if(mpr121_read_buttons(dev, &states, 0) != UPM_SUCCESS){
printf("Error while reading button values\n");
}
printf("retrieved button states: %d\n", states);
upm_delay(1);
}
mpr121_context dev = mpr121_init(MPR121_I2C_BUS, MPR121_DEFAULT_I2C_ADDR);
mpr121_close(dev);
printf("all done!!\n");
if(mpr121_config_an3944(dev) != UPM_SUCCESS){
printf("unable to configure device\n");
}
uint32_t states;
while(1){
if(mpr121_read_buttons(dev, &states, 0) != UPM_SUCCESS){
printf("Error while reading button values\n");
}
printf("retrieved button states: %d\n", states);
upm_delay(1);
}
return 0;
mpr121_close(dev);
printf("all done!!\n");
return 0;
}