TAOS TSL2560 EVM, Руководство пользователя

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An Evaluation System for the TSL2560/61 Ambient Light Sensor
www.taosinc.com
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G
ETTING
S
TARTED
IMPORTANT: Before getting started, please review the “USB EVM Hardware and
Driver Description” section which contains information to insure that the proper USB
driver is loaded.
On most PCs, installation will automatically start when the CD-ROM is inserted into the drive. If the
installation does not begin:
ƒ
Click Start
ƒ
Click Run
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Type D:\setup and press Enter. IMPORTANT: Use the appropriate drive letter in the above
command to install the software. CD-ROMs are commonly D:
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The installation program will guide you through the product installation
Refer to the ReadMe file on CD for the latest installation instructions.
Two applications are loaded: “Automatic Brightness Control Demo” and “Device Utility”. Both
applications are discussed in the following pages.
A
UTOMATIC
B
RIGHTNESS
C
ONTROL
D
EMO
Software Description
To start the Automatic Brightness Control Demo application, click:
Start -> Programs -> TSL2560 USB EVM -> Automatic Brightness Control Demo
After the demo is executed, a “Monitor” dialog window (see below) will appear on top and an
application icon will appear in the system tray. The demo will continue to run until the monitor
application is closed.
The TSL2560/61 device can measure light levels ranging from approximately 0.1 lux to 40,000 lux.
No external circuitry is required for signal conditioning, and the integrating conversion technique used
in the ALS device eliminates the effect of fluorescent flicker, thereby increasing the stability of the
measurement.
The EVM application constantly monitors the ambient light level through the use of two photodiodes
on the TSL2560. One of the photodiodes (Channel 0) is sensitive to both visible and infrared light,
while the second photodiode (Channel 1) is sensitive primarily to infrared light. An integrating ADC
converts the photodiode currents to Channel 0 and Channel 1 digital outputs. Channel 1 digital output
is used to compensate for the effect of the infrared component of light on the Channel 0 digital
output.
Graphical User Interface (GUI)
The TSL2560 GUI is composed of three dialogs: Automatic Brightness Control Configuration ,
Advanced , and Monitor . A fourth dialog (Main) is hidden and manages the ALS’ system tray icon,
menu, and profile selection.