/**
* This method sets the gain and the integration time
*
* If gain = false (0), device is set to low gain (1X)
* If gain = high (1), device is set to high gain (16X)
* If time = 0, integration will be 13.7ms
* If time = 1, integration will be 101ms
* If time = 2, integration will be 402ms
* If time = 3, use manual start / stop
*
* @param gain - the gain
* @param time - the time
*/
void TSL2561::set_timing(uint8_t gain, uint8_t time){
//! Read the timing location
i2c_packet* ptr = read_timing();
//! Get timing byte
if (ptr->valid_packet){
this->_timing = ptr->buffer[0];
//! Set gain (0 or 1)
if (gain)
this->_timing |= 0x10;
else
this->_timing &= ~0x10;
//! Set integration time (0 to 3)
this->_timing &= ~0x03;
this->_timing |= (time & 0x03);
//! Write the timing back
write_timing();
}
return;
}
/**
* This method starts a manual integration period.
*
* @return - if the command was successful
*/
bool TSL2561::manual_start(void){
//! We read
i2c_packet* ptr = read_timing();
//! Get timing byte
if (ptr->valid_packet){
//! Set integration time to 3 (manual integration)
this->_timing |= 0x03;
if (write_timing()){
//! Begin manual integration
this->_timing |= 0x08;
//! Write modified timing byte back to device
if (write_timing())
return true;
}
}
return false;
}
/**
* This method stops a manual integration period.
*
* @return bool - if the command was successful
*/
bool TSL2561::manual_stop(void){
//! We read
i2c_packet* ptr = read_timing();
//! Get timing byte
if (ptr->valid_packet){
//! Stop manual integration
this->_timing &= ~0x08;
//! Write modified timing byte back to device
if (write_timing())
return true;
}
return false;
}
/**
* Print timing information to all streams
*
* @param warmDeltaT warmup time (sec)
* @param sampleDeltaT sample time (sec)
*/
void write_timing(double warmDeltaT, double sampleDeltaT) {
write_timing(warmDeltaT, sampleDeltaT, sample_writer_);
write_timing(warmDeltaT, sampleDeltaT, diagnostic_writer_);
write_timing(warmDeltaT, sampleDeltaT, message_writer_);
}
