User guide
TSL2571 EVM
Version 1.4a
TSL2571 Light-to-Digital
Ambient Light Sensor
Content
1
2
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
Establishing basic functionality ............................................................................................ 4
TSL2571 EVM graphical user interface (GUI) ..................................................................... 5
Software overview ................................................................................................................ 5
Input side, “Functional” tab .................................................................................................. 7
Input side, “Register” tab ...................................................................................................... 8
Output side, “Register” tab ................................................................................................. 11
Output side, “Functional” tab .............................................................................................. 12
Output side, “PLOT” tab ..................................................................................................... 12
“LUXEQ” and “LUXEQPLOT” tabs ..................................................................................... 12
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TSL2571
The TSL2571 devices are packaged to support various operational uses. Software is provided to
control the devices. Throughout this document, the device will be referred to as TSL2571.
Initial hardware setup
The software should be installed prior to connecting any hardware to the computer. Follow the
instructions found in the Quick Start Guide (QSG). This will load the required driver for the USB
interface and also the control software and graphical user interface (GUI). The hardware consists of
the EVM v2.1a Controllerboard, the TSL2571 Daughterboard and a USB interface cable and a USB
Memory Stick. When the USB cable is connected the green LED should light up indicating that
power is being received via the USB interface, and the controllerboard processor is running. If the
green LED does not light up, check the USB cable connections; unplug the USB cable and try
again. If the green LED still does not light, check the PC for USB error messages. See the
Resources section at the end of this document for additional assistance.
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1
Establishing basic functionality
The software should be started using the desktop icon or by double clicking the
DigitalLightSensor.exe file from the installation directory. The default installation directory,
depending on the device and the operating system you are using, is:
C:\Program Files\
ams
\TSL2571EVM Windows 32 bit operating systems
C:\Program Files (x86)\
ams
\TSL2571EVM Windows 64 bit operating systems
A different install path may be selected by the user. When started, two windows will open on the
PC. The top window, or Parent Window (PW), is not typically needed and may be placed out of the
way. The bottom window, or Child Window (CW), is the main user interface and should be
positioned on the screen for easy access. Clicking on the red “X” on the PW will close both windows
and terminate the application. Clicking on the red “X” on the CW will close only the CW.
The “Functional” tabs on both the left and right side of the main display (bottom window) will be
selected by default. On the right side, numbers should be changing, showing that the ALS functions
are operational. By changing the ambient light source or waving your hand over the sensor at <4
inch (100mm) separation you should see the ALS readings change correspondingly.
The balance of this document identifies and describes the controls available on the different tabs of
the GUI. In combination with the TSL2571 datasheet, the QSG and application notes available on
the
ams
website, www.
ams
.com, there should be enough information to allow evaluation of the
TSL2571 device.
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2
2.1
TSL2571 EVM graphical user interface (GUI)
Software overview
On initialization the software displays two windows – a smaller “Digital Light Sensor” window and a
larger window containing controls pertinent to the device connected.
If “No Devices” appears, verify that the daughterboard is connected to the motherboard properly. If
“No_HID” appears, verify the USB cable is connected. A green LED on the motherboard indicates
that the USB cable is connected and providing power to the system. The “Reset” button can be
pressed, or the software can be restarted, to reinitialize the system.
The larger window contains the user interface with control buttons, fields, selection boxes and
output values for the identified device connected. Tabs are used to make control and evaluation of
specific device functions easy. For the TSL2571 devices the initial display screen is shown:
This window has inputs organized on the left, and outputs organized on the right. Values for register
variables may be set using multiple techniques. The Functional tab is commonly used to quickly
evaluate the device with nominal settings. The Input Register tab allows the register settings to be
changed, and the Output Register tab allows registers to be viewed. Other tabs provide additional
demonstration and test features for evaluation.
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