Si1146 UVIRSlider2EK

2

Rev. 0.1

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.

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

Table 1. UV Demo Output Description

# Blue LEDs

UV Index

UV Index Description

5

11+

Extreme

4

8,9,10

Very High

3

6,7

High

2

3,4,5

Moderate

11,2

Low