int TSL2561_INTR_HIGH_THRESHOLD(TSL2561 *sensor, uint16_t threshold)
{
int rc;
rc = tsl2561_write16(sensor, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_THRESHHOLDH_LOW, threshold);
if (rc != 0) // invalid read or sensor error
return -1;
else
return 0;
}
/**
* Sets the upper and lower interrupt thresholds
*
* @param The sensor interface
* @param rate Sets the rate of interrupts to the host processor:
* - 0 Every ADC cycle generates interrupt
* - 1 Any value outside of threshold range
* - 2 2 integration time periods out of range
* - 3 3 integration time periods out of range
* - 4 4 integration time periods out of range
* - 5 5 integration time periods out of range
* - 6 6 integration time periods out of range
* - 7 7 integration time periods out of range
* - 8 8 integration time periods out of range
* - 9 9 integration time periods out of range
* - 10 10 integration time periods out of range
* - 11 11 integration time periods out of range
* - 12 12 integration time periods out of range
* - 13 13 integration time periods out of range
* - 14 14 integration time periods out of range
* - 15 15 integration time periods out of range
* @param lower The lower threshold
* @param upper The upper threshold
*
* @return 0 on success, non-zero on failure
*/
int
tsl2561_setup_interrupt(struct sensor_itf *itf, uint8_t rate, uint16_t lower,
uint16_t upper)
{
int rc;
uint8_t intval;
/* Set lower threshold */
rc = tsl2561_write16(itf, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT |
TSL2561_REGISTER_THRESHHOLDL_LOW, lower);
if (rc) {
goto err;
}
/* Set upper threshold */
rc = tsl2561_write16(itf, TSL2561_COMMAND_BIT | TSL2561_WORD_BIT |
TSL2561_REGISTER_THRESHHOLDH_LOW, upper);
if (rc) {
goto err;
}
/* Set rate */
rc = tsl2561_read8(itf, TSL2561_COMMAND_BIT | TSL2561_REGISTER_INTERRUPT,
&intval);
if (rc) {
goto err;
}
/* Maintain the INTR Control Select bits */
rate = (intval & 0xF0) | (rate & 0xF);
rc = tsl2561_write8(itf, TSL2561_COMMAND_BIT | TSL2561_REGISTER_INTERRUPT,
rate);
if (rc) {
goto err;
}
return 0;
err:
return rc;
}
