S i 11 4 6 U V I R S l i d e r 2 E K
Demo Kit
Si1146 UVIRS
L I D E R
2EK D
EMO
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1. Kit Contents
The Si1146 UVIRSlider2EK Demo Kit contains the following items:
Si1146
UVIRSlider2EK Demo Board
Si1146 UVIRSlider2EK Demo Board Quick Start Guide
USB Cable
2. Introduction
The Si1146 UVIRSlider2EK Demo Board implements a UV Index sensing function based around the Si1146 UV,
infrared proximity, and ambient light sensor. As shown in Figure 1, the main components of the board are the
Si1146 sensor (U2), the C8051F800 microcontroller (U1), and two infrared emitters (DS1 and DS2). Hardware is
also provided on-board to facilitate code development for the C8051F800 and communications with software
support packages over a USB interface.
The firmware running on the C8051F800 measures the UV Index of the environment of the Si1146 sensor and
indicates the UV Index detected by illuminating blue LEDs on the board.
The board is also capable of running a touchless slider algorithm using infrared light energy detected by the
Si1146, while each of the two infrared emitters are independently activated. The infrared light from these emitters
will be reflected back to the Si1146 by any object that is placed in proximity to the board. The left-right position is
then calculated from these two measurements and used to illuminate the appropriate signal LED. If no object is
close enough to the board, the measured signal levels will fall below pre-determined thresholds, and no signal
LEDs will be illuminated. In addition to indicating the current position, the algorithm is also able to detect different
gestures from the infrared sensor, as described in Table 2 on page 3. The Si1146’s ambient light sensor (ALS) is
also monitored by the software, which can determine the amount of ambient light present.
On this board, the infrared emitters used are OSRAM part number SFH 4056. These emitters have a power rating
of 40 mW and a half-angle of 22 degrees. Other emitters with different characteristics may also be used,
depending on the specific application requirements.
Note:
The touchless infrared position and gesture detection implemented in the example is patent pending.
DS12
DS11
DS13
UVIRSLIDER2EK
SILICON LABS
www.silabs.com
DS10
+5V_IN
U3
F326
P1
DS14
DS8
DS9
DS5
DS6
DS7
DS4
DS3
U1
F800
DS1
U2
DS2
Figure 1. Si1146 Slider Demo Board
Rev. 0.1 1/14
Copyright © 2014 by Silicon Laboratories
Si1146 Slider Demo Kit
Si1146 UVIRSlider2EK
3. Running the Pre-Loaded UV Index Demo
1. The board receives its power over the USB interface. Connect one end of a USB cable to the USB
connector (P1) on the Si1146 UVIRSlider2EK Demo Board and the other end to a USB Port on the PC.
2. The red LED DS10 should light on the board, indicating that it is receiving power from the USB.
3. The visible blue LEDs will light according to the perceived UV Index of the environment above the board.
4. See Table 1 on page 2 for a description on what the number of blue LEDs illuminated represents.
Table 1. UV Demo Output Description
# Blue LEDs
5
4
3
2
1
UV Index
11+
8,9,10
6,7
3,4,5
1,2
UV Index Description
Extreme
Very High
High
Moderate
Low
4. Software Overview
The UVIRSLIDER2EK is supported by the UVIRSLIDER Demo application and the Si114x Programmer's Toolkit.
The software can be downloaded from the web at:
http://www.silabs.com/products/sensors/pages/optical-sensor-
software.aspx.
The UVIRSLIDER Demo application allows the user to select the UV Index demo, the IR Slider demo, or the UDP
Waveform Viewer. The UV demo includes a GUI that displays the full 11+ UV Index value and the 5-level UV sun
exposure level. The IRSLIDER demo tracks the movement of your hand over the 8 LEDs on the board using
proximity to sense the position of your hand. The IRSLIDER demo can also detect hand gestures as described in
Table 2. The UDP Waveform Viewer allows users to see real-time infrared proximity and ambient light
measurements from the Si1146 in a graphical form.
The Si114x Programmer's Toolkit API enables rapid development of Si114x software in a PC environment using
the Si1146 UVIRSlider2EK Demo Board. The Si114x Programmer's Toolkit contains example source code that
allows developers to get started quickly and then tailor the code to their needs. In addition, the Silicon Labs
Integrated Development Environment (IDE) provides a means of developing code for the C8051F800 and uses the
USB connection on the board to program the MCU and perform in-system debugging.
4.1. Using the UVIRSlider2EK Demo Board with the UVIRSLIDER Demo Application
The Si1146 UVIRSlider2EK Demo Board is supported by the UVIRSLIDER Demo application. The UVIRSLIDER
Demo application allows the user to run the UV Index or IR Slider demos as well as launch the UDP Waveform
Viewer. The UDP Waveform Viewer allows users to see real-time infrared proximity and ambient light
measurements from the Si1146 in a graphical form. The communications interface to the Si1146 UVIRSlider2EK
Demo Board is provided over the USB connection.
To use the UVIRSLIDER Demo with the Si1146 UVIRSlider2EK Demo Board, perform the following steps:
1. Connect the Si1146 UVIRSlider2EK Demo Board to the PC using a USB cable.
2. Launch the UVIRSLIDER Demo. If you do not have this application, it is available for download at the link
provided at the beginning of the Software Overview description.
3. Select the desired demo from the Main Menu.
4. Follow the instructions on the screen for how to use the demo.
5. The UDP Waveform Viewer can be launched by pressing on the Waveform Viewer button on the demo
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Si11 46 UVIRSlider2EK
application screen.
Note:
The the Si114x Programmer’s Toolkit, and the IDE cannot connect to the Si1146 UVIRSlider2EK Demo Board at the
same time. Be certain to disconnect from the board in one software package before trying to connect in the other.
Figure 2 shows an example of the UVIRSLIDER Demo main window when connected to the Si1146
UVIRSlider2EK Demo Board.
Figure 2. UVIRSLIDER Demo Main Window
Table 2. Recognized Gestures
Gesture Name
Pause
Swipe Left
Swipe Right
Parameter
Position
Speed
Speed
Description of Action and LED Indication
Hold hand steady in a single position above the board for 3/4 sec-
ond. Current position LED will blink briefly.
Move hand rapidly from the right side to the left side of the board.
LEDs will briefly indicate a leftward sweep pattern.
Move hand rapidly from the left side to the right side of the board.
LEDs will briefly indicate a rightward sweep pattern.
Rev. 0.1
3
Si1146 UVIRSlider2EK
4.2. Si114x Programmer’s Toolkit
4.2.1. Software API
The Si114x Programmer’s Toolkit API enables rapid development of Si114x software in a PC environment using
the Si1146 UVIRSlider2EK Demo Board. By emulating an I
2
C interface over USB, the Si114x Programmer’s Toolkit
API allows source code to be developed on a PC and then migrated quickly and easily to an MCU environment
once target hardware is available. Either commercially-available or free PC-based C compilers can be used for
software development with the Si114x Programmer’s Toolkit API.
The Si114x Programmer’s Toolkit API also includes the Si114x UDP Waveform Viewer Application. This tool runs in
conjunction with user applications to display and debug the measurements taken from the Si1146 UVIRSlider2EK
Demo Board.
Note:
The Si114x Programmer’s Toolkit and IDE cannot connect to the Si1146 UVIRSlider2EK Demo Board at the same time.
Be certain to disconnect from the board in one software package before trying to connect in the other.
4.2.2. Command Line Utilities
For evaluation of the Si1146 UVIRSlider2EK Demo Board without the need to develop and compile source code, a
flexible set of command line utilities is also provided with the Si114x Programmer’s Toolkit. These utilities can be
used to configure and read samples from the Si1146 UVIRSlider2EK Demo Board. For automated configuration
and scripting, the command line utilities can be embedded into .bat files.
4.2.3. Sample Source Code
For faster application development, the Si114x Programmer’s Toolkit contains example source code for the Si1146
UVIRSlider2EK Demo Board and for each of the command line utilities. Developers can get started quickly by
using the Si114x example source code and then tailoring it to their needs.
4.2.4. Downloading the Si114x Programmer’s Toolkit
The Si114x Programmer’s Toolkit and associated documentation is available from the web at the following URL:
http://www.silabs.com/products/sensors/pages/optical-sensor-software.aspx.
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Si11 46 UVIRSlider2EK
4.3. Silicon Laboratories IDE
The Silicon Laboratories IDE integrates a source-code editor, a source-level debugger, and an in-system Flash
programmer. This tool can be used to develop and debug code for the C8051F800 MCU, which is included on the
Si1146 UVIRSlider2EK Demo Board. The use of several third-party compilers and assemblers is supported by the
IDE.
4.3.1. IDE System Requirements
The Silicon Laboratories IDE requirements are:
Pentium-class
host PC running Microsoft Windows 2000 or newer
One available USB port
4.3.2. Third Party Toolsets
The Silicon Laboratories IDE has native support for many 8051 compilers. The full list of natively-supported tools is
as follows:
Keil
IAR
Raisonance
Tasking
SDCC
4.3.3. Downloading the Example Firmware Image
Source code that has been developed and compiled for the C8051F800 MCU on the Si1146 UVIRSlider2EK Demo
Board may be downloaded to the board using the Silicon Laboratories IDE. Follow the instructions below to update
or refresh the .HEX image in the Si1146 UVIRSlider2EK Demo Board.
1. Connect the Si1146 UVIRSlider2EK Demo Board to the PC using a USB cable.
2. Launch the Silicon Labs IDE, and click on
Options->Connection Options.
3. Select “USB Debug Adapter”, and then select the board from the list (it should show up as “TS” followed by
a serial number).
4. Select “C2” as the debug interface, and press “OK”.
5. Connect to the board by pressing the “Connect” icon, or using the keyboard shortcut Alt+C.
6. Click on the “Download” icon, or use the keyboard shortcut Alt+D.
7. In the download dialog window, click “Browse”.
8. Change to Files of Type “Intel Hex (*.hex)” and then browse to select the file.
9. Click “Open” then “Download”.
10. To run the new image, either press “Run” or “Disconnect” in the IDE.
Note:
The Si114x Programmer’s Toolkit and the IDE cannot connect to the Si1146 UVIRSlider2EK Demo Board at the same
time. Be certain to disconnect from the board in one software package before trying to connect in the other.
Rev. 0.1
5
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