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Si1140-DK

Si1140 DEVELOPMENT KIT USER’S GUIDE

1. Kit Contents

The Si1140 Development Kit contains the following items:

 Si1143 Evaluation Board

 Si1140DK Quick Start Guide

 1 USB Cable

2. Introduction

The Si1140DK is intended as an evaluation and development platform for the Si1143 infrared proximity and

ambient light sensor. As shown in Figure 1, the main components of the Si1143 Evaluation Board (Si1143_EB) are

the Si1143 sensor (U2), the C8051F800 microcontroller (U1), and the infrared emitters (DS1 through DS9). On this

PCB, 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.

The example firmware for the kit measures the infrared light energy detected by the Si1143 while each of three

infrared emitters are independently activated. The infrared light from these emitters will be reflected back to the

Si1143 by any object that is placed in proximity to the sensor. X, Y, and Z positions can be calculated from these

measurements. If no object is close enough to the board, the measured signal levels will fall below predetermined

thresholds, and the position calculations will not update. The Si1143’s ambient light sensor (ALS) is also monitored

by the firmware. The example firmware is intended to be used in conjunction with the Si114x

Performance Analysis

Tool to provide user feedback. In addition to calculating the current position, the firmware is able to detect different

gestures from the infrared sensor, as described in Table 2 on page 6.

Figure 1. Si1143 Evaluation Board

DS13

DS10

DS11

F326

SILICON LABS

www.silabs.com

Si1143-EB

DS12

F800

DS5

DS9

+5V_IN

DS1

DS3

DS2DS4

DS7

DS6

DS8

Downloaded from Arrow.com.

Summary of content (11 pages)

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S i 11 4 0 - D K S i 11 4 0 D E V E L O P M E N T K I T U SER ’ S G UIDE 1. Kit Contents The Si1140 Development Kit contains the following items: Si1143 Evaluation Board Si1140DK Quick Start Guide  1 USB Cable   2. Introduction The Si1140DK is intended as an evaluation and development platform for the Si1143 infrared proximity and ambient light sensor.
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Si1140-DK 3. Software Overview There are several optional software packages available to support the Si1143 Evaluation Board. The Si114x Performance Analysis Tool can be used for initial evaluation to collect data from the board over the USB interface and display it graphically. For users ready to develop their own software, the Si114x Programmer’s Toolkit API enables rapid development of Si114x software in a PC environment using the Si1143 Evaluation Board.
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Si1140-DK 3.1.1. Channel Selection Selecting which channels to display is done by checking the appropriate boxes on the Board Representation window, shown in Figure 3, and the Generic Data window, shown in Figure 4. There are two different groups of measurements available from the example firmware: raw data channels and generic data channels. 3.1.1.1. Raw Data Channels The raw data measurements can be seen by selecting the channels from the Board Representation window, shown in Figure 3.
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Si1140-DK 3.1.1.2. Generic Data Channels The generic data channels contain any data generated by the host MCU. These 16-bit channels can be anything from simple debug channels to calculated position values. See Table 1 for an explanation of all the channels shown in Figure 4. Figure 4. Generic Data Channel Selection 4 Downloaded from Arrow.com. Rev. 0.
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Si1140-DK Table 1. Generic Data Channels Name Label G0 Rad1 G1 Rad2 G2 Rad3 G3 X(mm) G4 Y(mm) G5 Z(mm) G6 iLED1 G7 iLED2 G8 iLED3 G9 VIS Type Description Using characterization of the PS measurements with objects at certain distances, it is possible to estimate the Linearized Distance Measurements distance of an object based on the PS measurement value. These three channels represent the distance estimations for each LED's measurement.
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Si1140-DK 3.1.2. Gesture Sensing In addition to infrared and ambient light measurements and distance calculations, the example firmware contains algorithms for gesture recognition. When connected to the board with the Performance Analysis Tool, a group window will appear, as shown in Figure 5. When a gesture is recognized by firmware, the gesture name and parameter information will be added to the top of the 3D Gesture group. Four gestures are supported by the example code.
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Si1140-DK 3.2. Si114x Programmer’s Toolkit 3.2.1. Software API The Si114x Programmer’s Toolkit API enables rapid development of Si114x software in a PC environment using the Si1140DK. By emulating an I2C 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.
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Si1140-DK 3.3. 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 Si1143 Evaluation Board. The use of several third-party compilers and assemblers is supported by the IDE. 3.3.1. IDE System Requirements The Silicon Laboratories IDE requirements:   Pentium-class host PC running Microsoft Windows 2000 or newer.
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Si1140-DK Figure 6. Si1143 Evaluation Board Schematic 4. Schematic Rev. 0.3 Downloaded from Arrow.com.
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Si1140-DK DOCUMENT CHANGE LIST Revision 0.2 to Revision 0.3  Replaced QuickSense Studio references and instructions with Si114x Programmer’s Toolkit. 10 Downloaded from Arrow.com. Rev. 0.
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