// this is a private function that is used to get data from the sensor (infrared + full spectrum including infrared)
static inline int tsl2561_getdata(TSL2561 *sensor, uint16_t *full_spectrum, uint16_t *infrared) {
TSL2561_ON(sensor);
// wait for the internal ADC to complete conversion
switch(sensor->integration_time) {
case TSL2561_INTEGRATIONTIME_13MS:
usleep(20000);
break;
case TSL2561_INTEGRATIONTIME_101MS:
usleep(150000);
break;
case TSL2561_INTEGRATIONTIME_402MS:
usleep(450000);
break;
}
//usleep(450000);
// reads two bytes from channel 0 (full spectrum + infrared)
//*full_spectrum = wiringPiI2CReadReg16(_fd, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN0_LOW);
*full_spectrum = tsl2561_read16(sensor, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN0_LOW);
//fprintf(stdout, "got 0x%04X for full spectrum light\n", *full_spectrum);
// reads two bytes from channel 1 (infrared)
//*infrared = wiringPiI2CReadReg16(_fd, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN1_LOW);
*infrared = tsl2561_read16(sensor, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN1_LOW);
//fprintf(stdout, "got 0x%04X for ir light\n", *infrared);
// turn the device off to save power
TSL2561_OFF(sensor);
return 0;
}
int
tsl2561_get_data(uint16_t *broadband, uint16_t *ir, struct tsl2561 *tsl2561)
{
int rc;
int delay_ticks;
/* Wait integration time ms before getting a data sample */
switch (tsl2561->cfg.integration_time) {
case TSL2561_LIGHT_ITIME_13MS:
delay_ticks = 14 * OS_TICKS_PER_SEC / 1000;
break;
case TSL2561_LIGHT_ITIME_101MS:
delay_ticks = 102 * OS_TICKS_PER_SEC / 1000;
break;
case TSL2561_LIGHT_ITIME_402MS:
default:
delay_ticks = 403 * OS_TICKS_PER_SEC / 1000;
break;
}
os_time_delay(delay_ticks);
*broadband = *ir = 0;
rc = tsl2561_read16(TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN0_LOW,
broadband);
if (rc) {
goto err;
}
rc = tsl2561_read16(TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN1_LOW,
ir);
if (rc) {
goto err;
}
#if MYNEWT_VAL(TSL2561_STATS)
switch (tsl2561->cfg.integration_time) {
case TSL2561_LIGHT_ITIME_13MS:
STATS_INC(g_tsl2561stats, samples_13ms);
break;
case TSL2561_LIGHT_ITIME_101MS:
STATS_INC(g_tsl2561stats, samples_101ms);
break;
case TSL2561_LIGHT_ITIME_402MS:
STATS_INC(g_tsl2561stats, samples_402ms);
default:
break;
}
#endif
err:
return rc;
}
/**
* Gets a new data sample from the light sensor.
*
* @param The sensor interface
* @param broadband The full (visible + ir) sensor output
* @param ir The ir sensor output
*
* @return 0 on success, non-zero on failure
*/
int
tsl2561_get_data(struct sensor_itf *itf, uint16_t *broadband, uint16_t *ir)
{
int rc;
*broadband = *ir = 0;
rc = tsl2561_read16(itf, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT |
TSL2561_REGISTER_CHAN0_LOW, broadband);
if (rc) {
goto err;
}
rc = tsl2561_read16(itf, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT |
TSL2561_REGISTER_CHAN1_LOW, ir);
if (rc) {
goto err;
}
return 0;
err:
return rc;
}
