TSL2581, TSL2583
LIGHT-TO-DIGITAL CONVERTER
TAOS134 − MARCH 2011
18
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r
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
www.taosinc.com
APPLICATION INFORMATION: SOFTWARE
The following pseudo code illustrates a procedure for reading the TSL258x device (ALS) using word
transactions:
Command = 0x80 //Set Command bit and Control Reg
Power_On = 0x01
//Power on device
WriteByte (Address, Command, Power_On)
Command = 0x81 //Set Command bit and ALS Timing Reg
ATIME = 0xb6 //200 ms integration cycle
//Configure ALS Timing Register for 200 ms integration cycle
WriteByte (Address, Command, ATIME)
Command = 0x80 //Set Command bit and Control Reg
ADC_En = 0x03 //Enable ADC Channels
//Keep device powered on and enable ADC prior to reading channel data
WriteByte (Address, Command, ADC_En | Power_On)
// Read ADC Channels Using Read Word Protocol − RECOMMENDED
//Address the Ch0 lower data register and configure for Read Word
Command = 0Xb4 //Set Command bit and Word bit
//Reads two bytes from sequential registers 0x14 and 0x15
//Results are returned in DataLow and DataHigh variables
ReadWord (Address, Command, DataLow, DataHigh)
Channel0 = 256 * DataHigh + DataLow
//Address the Ch1 lower data register and configure for Read Word
Command = 0xb6 //Set Command bit and Word bit
//Reads two bytes from sequential registers 0x16 and 0x17
//Results are returned in DataLow and DataHigh variables
ReadWord (Address, Command, DataLow, DataHigh)
Channel1 = 256 * DataHigh + DataLow //Shift DataHigh to upper byte
