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Silicon Laboratories SI4421 Manuel d'utilisateur

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Rev. 0.1 11/08 Copyright © 2008 by Silicon Laboratories RF Wireless Foundation CB1
RF WIRELESS FOUNDATION COURSE BOOK ONE
Overview
This course book comes as the lab manual of the “Wireless Foundation Course” for use in the practical sessions. It
is assumed that the student has completed the lecture sessions prior to attempting this lab section.
In this foundation course, students will use the EZRadio
®
wireless product line from Silicon Laboratories to
calculate variables, generate code, and create a simple wireless link. Using EZRadio technology, students will
come to understand RF basics by implementing simple tasks using the Si4421 Universal FSK transceiver on an
EZLink™ platform.
RF basic lessons:
Lesson 1: Optimizing the RF parameters
Lesson 2: CW link between two EZLink modules
Lesson 3: Sending packets
Introducing the Hardware Platform
During these lab sessions the EZLink platform will be used for code development. The firmware pre-loaded onto
the EZLink platforms is not the standard firmware, it is specific to this foundation course. The firmware image
should be available on the course CDROM or pre-installed onto the course PCs (if provided). When pre-installed,
the image typically can be found in the following folder:
C:\Silabs\SRW\RF Basic Lesson\ (assuming C: is the local Hard Disc)
In the event that your PC is setup differently then your course leader will be able to re-direct you to the correct
location.
Figure 1. EZLink
EZLink's development hardware can be connected to a PC via a standard USB cable. The PC will recognize the
hardware as a serial device since the hardware comes equipped with a USB to UART converter on the EZLink
peripheral board.
The serial settings used for communication are as follows:
Data rate: 9.6 kbps
Bits: 8
Parity: NO
Stop bit: 1
Handshake: NONE
DESK NUMBER: __________
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Résumé du contenu

Page 1 - DESK NUMBER: __________

Rev. 0.1 11/08 Copyright © 2008 by Silicon Laboratories RF Wireless Foundation CB1RF WIRELESS FOUNDATION COURSE BOOK ONEOverviewThis course book comes

Page 2 - 2 Rev. 0.1

RF WIRELESS FOUNDATION COURSE BOOK ONE10 Rev. 0.1What is Happening on the Receiver Side?The modulated data is represented by two frequencies: and ,

Page 3 - Figure 2. Select Mode

RF WIRELESS FOUNDATION COURSE BOOK ONERev. 0.1 11Exercise 2—How to Set the Second EZLink Module as a CW ReceiverThe example project shows a very simpl

Page 4 - 4 Rev. 0.1

RF WIRELESS FOUNDATION COURSE BOOK ONE12 Rev. 0.1LESSON 3: SENDING PACKETSThere are few rules which are needed when sending data through an RF link; h

Page 5 - Deviation

RF WIRELESS FOUNDATION COURSE BOOK ONERev. 0.1 13Exercise 1—How to Send Packets with Addressing FieldsThis exercise uses a project which sends and rec

Page 6 - 6 Rev. 0.1

RF WIRELESS FOUNDATION COURSE BOOK ONE14 Rev. 0.1Figure 17. WDS Terminal Emulator

Page 7

RF WIRELESS FOUNDATION COURSE BOOK ONERev. 0.1 15NOTES:

Page 8 - 8 Rev. 0.1

RF WIRELESS FOUNDATION COURSE BOOK ONE16 Rev. 0.1CONTACT INFORMATIONSilicon Laboratories Inc.4635 Boston LaneAustin, TX 78735Tel: 1+(512) 416-8500Fax:

Page 9 - Rev. 0.1 9

RF WIRELESS FOUNDATION COURSE BOOK ONE2 Rev. 0.1LESSON 1: OPTIMIZING THE RF PARAMETERSExercise 1—How to Calculate RF Link ParametersOne of the earlies

Page 10 - Tips & Tricks

RF WIRELESS FOUNDATION COURSE BOOK ONERev. 0.1 3Exercise 2—Entering Parameters into WDSThe wireless development suite (WDS) contains a software module

Page 11 - Rev. 0.1 11

RF WIRELESS FOUNDATION COURSE BOOK ONE4 Rev. 0.1Figure 4. Start Radio Control Panel2. Load the “Si4421_Configuration.swc” configuration file(the locat

Page 12 - LESSON 3: SENDING PACKETS

RF WIRELESS FOUNDATION COURSE BOOK ONERev. 0.1 53. Set Center Frequency, Baseband Bandwidth, and Deviation according to your calculations.Figure 6. Se

Page 13

RF WIRELESS FOUNDATION COURSE BOOK ONE6 Rev. 0.1Exercise 3—How to Generate a Header File for Our SoftwareAt the top level, the WDS Chip configurator i

Page 14 - 14 Rev. 0.1

RF WIRELESS FOUNDATION COURSE BOOK ONERev. 0.1 7LESSON 2: CW LINK BETWEEN TWO EZLINK MODULESIn review of the lecture portion of this course, this less

Page 15 - Rev. 0.1 15

RF WIRELESS FOUNDATION COURSE BOOK ONE8 Rev. 0.1Figure 9. Output Spectrum (CW), if FSK = 0 and mp = 0 (Positive Modulation)Figure 10. Output Spectrum

Page 16 - CONTACT INFORMATION

RF WIRELESS FOUNDATION COURSE BOOK ONERev. 0.1 9Exercise 1—How to Set Up an EZLink Si4421 Module as a CW TransmitterThis example project modulates the

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