led_context led_init_str(const char* name){
// make sure MRAA is initialized
int mraa_rv;
if ((mraa_rv = mraa_init()) != MRAA_SUCCESS)
{
printf("%s: mraa_init() failed (%d).\n", __FUNCTION__, mraa_rv);
return NULL;
}
led_context dev =
(led_context)malloc(sizeof(struct _led_context));
if (!dev)
return NULL;
dev->led_pin = -1;
dev->gpio = NULL;
dev->name = name;
dev->gpioled = mraa_led_init(name);
if (!dev->gpioled) {
printf("%s: Unable to initialize gpioled device (%s).\n", __FUNCTION__, dev->name);
free(dev);
return NULL;
}
dev->max_brightness = mraa_led_read_max_brightness(dev->gpioled);
return dev;
}
/**
* Instantiates an LED object
*
* @param led LED index to use
*/
Led(int led)
{
m_led = mraa_led_init(led);
if (m_led == NULL) {
throw std::invalid_argument("Invalid LED name specified");
}
}
