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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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58
examples/c/bh1750.c
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@ -26,6 +26,8 @@
#include <signal.h>
#include "bh1750.h"
#include "upm_utilities.h"
#include "mraa.h"
bool shouldRun = true;
@ -37,39 +39,45 @@ void sig_handler(int signo)
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a BH1750 sensor on default I2C bus (0), using the
// default I2C address (0x23), and setting the mode to highest
// resolution, lowest power mode.
bh1750_context sensor = bh1750_init(BH1750_DEFAULT_I2C_BUS,
BH1750_DEFAULT_I2C_ADDR,
BH1750_OPMODE_H2_ONCE);
if (!sensor)
if (mraa_init() != MRAA_SUCCESS)
{
printf("bh1750_init() failed.\n");
return 1;
perror("Failed to initialize mraa\n");
return -1;
}
// Every second, sample the BH1750 and output the measured lux value
signal(SIGINT, sig_handler);
while (shouldRun)
//! [Interesting]
// Instantiate a BH1750 sensor on default I2C bus (0), using the
// default I2C address (0x23), and setting the mode to highest
// resolution, lowest power mode.
bh1750_context sensor = bh1750_init(BH1750_DEFAULT_I2C_BUS,
BH1750_DEFAULT_I2C_ADDR,
BH1750_OPMODE_H2_ONCE);
if (!sensor)
{
float lux;
bh1750_get_lux(sensor, &lux);
printf("Detected Light Level (lux): %f\n", lux);
sleep(1);
printf("bh1750_init() failed.\n");
return 1;
}
//! [Interesting]
// Every second, sample the BH1750 and output the measured lux value
printf("Exiting\n");
while (shouldRun)
{
float lux;
bh1750_close(sensor);
bh1750_get_lux(sensor, &lux);
printf("Detected Light Level (lux): %f\n", lux);
upm_delay(1);
}
return 0;
//! [Interesting]
printf("Exiting\n");
bh1750_close(sensor);
return 0;
}