Docklight Application Note: Low Latency Monitoring with Docklight Tap
Contents
1. MA EA ARDA EN EREN E ME EA me A m AIT nO E Click Next to continue Hardware Update Wizard This wizard helps you install software for USB Serial Converter A ff your hardware with an installation CD QEA or floppy disk insert it now What do you want the wizard to do Install the software automatically Recommended Click Next to continue Hardware Update Wizard Please choose your search and installation options tase Yy Search for the best driver in these locations Use the check boxes below to limit or expand the default search which includes local paths and removable media The best driver found will be installed Search removable media floppy CD ROM Include this location in the search Dtemp Docklight_Tap_Driverss CDM 2 04 16 WHO t Bont search will choose the driver to install Choose this option to select the device driver from a list Windows does not guarantee that the diver you choose will be the best match for your hardware lee Ite O O T T pe onna pop f pf Heggelbacher Docklight Application Note ee Low Latency Monitoring with Docklight Tap Win 7 Update 2011 11 28 He Applies to Docklight V1 9 Docklight Scripting V1 9 20090602 e 1 1 Docklight Tap 2009 05 11 Schaar amp EZ Tap 008 06 17 S amp S Heggelbacher Nam jachmann und Heggelbacher www fu h edv de NIN Page Docklight Application Note lt2. Online Help F1 for details Data Bits 8 Stop Bits 1 4 Review and adjust the COM Port Settings baud rate parity and confirm all settings with OK Project Settings Communication Flow Control Communication Filter Communication Mode l 1 2 Monitorin Dend Recewe OAS g receive on Recernve Channel 1 Receive Channel 2 TAPO TAF Choose a COM port e g COMS or a USB Monitoring Tap e g TAPO or epecity a network connection See the Online Help F1 for details COM Port Settings Baud Rate Data Bits 8 r Parity Stop Bits 1 Parity Error Char 115200 LIF Cancel Help po tte 2011 11 28 po th Heggelbacher__ Docklight Application Note a EE PAuth Flachmann __ Low Latency Monitoring with Docklight Tap Win 7 Update _ 2011 11 28 Hej Applies to Docklight V1 9 Docklight Scripting V1 9 2009 0602 He Docklight Tap 2009 05 11 Schaar amp EZ Tap 2008 06 17 Heggelbacher Sn www furedy de Page Docklight Application Note Docklight_Application_Note_DocklightTap doc 5 Choose the menu Tools gt Options then select the following display options e Plain Text Output faster display but no colors amp fonts e Communication Window Modes HEX only or at least deactivate any representation you do not need 42 Options 42 Options Display Display Modes DateTime Stamps Control Characters Shortcuts Display Display Modes Date
3. Time Stamps Control Characters Shortcuts Communication Window Format Communication Window Modes Background Color Font Size ASCII Iw HE Binary Disable some of these seral data repesentations for faster display f Formatted Text Output Rich Text Format Control Characters ASCII O 31 E Add the character description in the ASCII communication window leg lt 5 T gt ETA Suppress original control char except lt CA2 lt LF gt line break 6 Choose the menu Tools gt Expert Options and select Communication Driver Mode External High Priority Process Mode then confirm with OK 7 Expert Options Performance Communication Drier Mode m Internal default High data throughput but lower monitoring accuracy typo 15 milliseconds External High Priority Process High monitoring accuracy limited by f seral device latency but lower data throughput and high CPL Usage Use Administrator user account for best results HAN Warning External Process Mode uses the highest process priority available High amounts of data traffic can freeze your PL Docklight Monitoring Mode Data Forwarding for COM ports default The data received on the fe first COM port is r e sent on the second COM and vice versa This allows routing serial data traffic through Docklight No Data Forwarding passive COM port monitoring only This can Po improve performance for AS24232 data monitoring using Docklig
4. 9 oo9 06 02 He 1 Docklight Tap 2009 05 11 Schaar amp 1 0 EZ Tap 008 06 17 Heggelbacher Docklight Application Note er Date Name ruonnntnanewow WWW fuh edv de oo NO a a N lt h _ lt ho E Docklight_Application_Note_DocklightTap doc 7 Copyright Copyright 2011 Flachmann amp Heggelbacher All rights reserved No parts of this work may be reproduced in any form or by any means graphic electronic or mechanical including photocopying recording taping or information storage and retrieval systems without the written permission of the publisher Trademarks Products that are referred to in this document may be either trademarks and or registered trademarks of the respective owners The publisher and the author make no claim to these trademarks Windows is a registered trademark of Microsoft Corporation in the United States and other countries Disclaimer While every precaution has been taken in the preparation of this document the publisher and the author assume no responsibility for errors or omissions or for damages resulting from the use of information contained in this document or from the use of programs and source code that may accompany it In no event shall the publisher and the author be liable for any loss of profit or any other commercial damage caused or alleged to have been caused directly or indirectly by this document Contact E Mail Support docklight fuh ed
5. Destination Files inside the ZIF archive will be extracted to the location you choose Select a folder to extract files to Files will be extracted to this directory Browse Password D ATemp Docklight_Tap Drivers 3 Connect the Docklight Tap to your PC and follow the Windows instructions for installing the drivers from the folder created above For detailed instructions please see the installation guides for the Docklight Tap FTDI chipset as available on the FTDI web site http ftdichip com Documents InstallGuides htm CO T T pe onas pot S f Hegoelbacher Docklight Application Note BAuth _ Flachmann Low Latency Monitoring with Docklight Tap Win 7 Update _ 2011 11 28 Hej Applies to Docklight V1 9 Docklight Scripting V1 9 Vi 2 minor coreotions 2009 06 02 He TE F Heggelbacher paman unaneggeseer WWW fuh edv de Docklight Application Note Page 7 10 Docklight_Application_Note_DocklightTap doc On Windows XP the basic installation process can look like this Found New Hardware Wizard Welcome to the Found New PASS Hardware Wizard SS Windows will search for current and updated software by looking on your computer on the hardware installation CD or on the Windows Update Web site with your permission d our privacy policy Can Windows connect to Windows Update to search for software Yes this time only Yes now and every time connect a device
6. Docklight_Application_Note_DocklightTap doc Docklight Application Note Low Latency Monitoring with Docklight Tap Table of Contents Docklight Application Note Low Latency Monitoring with Docklight Tap cccccccssseeeesseeeeeeeeeeeeeeneeeeeeneees 1 1 DOCKION VO auth estarsesost EEEE EE can cet ann EE EAA EEE E E E E EEEE E N EEES 1 AU Gee gree ee ee en E E ee ee ee 1 3 Limitations in PC Windows based RS232 monitoring cccccecsseeeeeeeceeeeeeeeeeaeeeeeeseaeegeeeeesaeaseeeeesaegeeeeenaas 2 4 Reference Configuration cccccccccsssseccccesseececceeseeeecceauseceecsaeueeeecseausecessseaaeeeeeessueeeeesssageeeessssageeeessagages 2 5 Low Latency Setup for RS232 monitoring cccceeecceecceeeeeeeeecaeeeeeeesaeeeeeeeeseeseeeesseaeeeeeeesaaeeeeessaeseeeeeenaas 3 e DIVOS O sexnapacuanaceaneawsanncadactenaseencmauneucapaevanediaun tons adnoaucaaang vousaweted inane dacnacnduammannsuanscummtedquneiaenedevaan 6 6 1 Windows 7 and Windows Vista 64 and 32 bit editions ceececccccseeeeeeeeeaeeeeeeeeeaeeeeeeeeseaaseeeesaaaees 6 6 2 WINGOWS AFF sasusatecashiviataeaterstesontacsusdetecnciartatnsabitanitasotienibetemensbistassdoladsdiuieiactuniniedeesbntedetanmicasaiesisnessn 7 L TOGO GN asec scist ae E EEE E EE AEEA 10 o Foe O Ser S E E 10 1 Docklight Tap Docklight Tap is a RS232 data tap solution for high performance time critical monitoring It is especially designed to ensure low latency for the data capturi
7. a oe Conmmmunication ports open Plain Text Mode TAPO TAP 9600 None 8 1 Send Sequences Communication Expert option high priority mode Sending sequences is not possible with the curently selected communication Decimal Binary mode Receive Only Click here to 42720049 TAP1 ee ee 4 27 2009 TAPO Change Communication Mode 4 27 2009 TAP1 42772009 TAFU 42772009 TAP1 4 27 2009 TAPU 472772009 TAF 42742009 TAPU 472772009 TAF 42772009 TAPU Pedee 37 2009 TAF1 Active Hame Sequence wy 472772009 TAPU 4 27 2009 4 27 2009 427 2009 4 27 2009 4272009 4 27 2009 4 27 2009 427 2009 4 27 2009 4 27 2009 4 27 2009 4 27 2009 4272009 4272009 4272009 4272009 427 2009 4 27 2009 OC T T pe oa CT T T p Heooebacner amn Flachmann V1 2 minor corrections 200906 02 He A amp Heggelbacher www fuh edv de TAF1 TAPO TAP1 TAPO TAP1 TAFO TAP I TAP O TAP TAPO TAP1 TAPO TAP TAPO TAP I TAPO TAP TAPO Docklight Application Note Low Latency Monitoring with Docklight Tap Win 7 Update _ 2011 11 28 Hej Applies to Docklight V1 9 Docklight Scripting V1 9 Page 5 10 Docklight Application Note Docklight_Application_Note_DocklightTap doc 6 Driver Installation 6 1 Windows 7 and Windows Vista 64 and 32 bit editions Driver download on Windows 7 and Windows Vista is fully automatic via Window
8. details about the driver files Generic USB Hub Generic USB Hub Update Driver To update the driver software for this device Intel R 5 Series 3400 Series Chipset Fay Intel R 5 Series 3400 Series Chipset Fi Rall Back Driver if the device fails after updating the driver roll Nokia Internet Stick DC Control SIERO Sa EEAO Ree AON USB C ite Devi ee Disable Disables the selected device USB Composite Device as m Device Uninstall To uninstall the driver Advanced oot Hu USB Root Hub USB Serial Converter A USB Serial Converter B O T T pe 2071 11 28 pot S f p Heggelbacher Docklight Application Note ee E ee ee Low Latency Monitoring with Docklight Tap Win 7 Update _ 2011 11 28 Hej Applies to Docklight V1 9 Docklight Scripting V1 9 2009 0602 He Docklight Tap 2009 05 11 Schaar amp EZ Tap 2008 06 17 He Heggelbacher numama WWW fuh edv de Page Docklight Application Note Docklight_Application_Note_DocklightTap doc For additional instructions please see the installation guides for the Docklight Tap FIDI chipset as available on the FTDI web site http ftdichip com Documents InstallGuides htm 6 2 Windows XP 1 Download the Docklight Tap FTDI USB device drivers from here http www docklight de download Docklight Tap Drivers zi 2 Extract the contents of the zip archive to a folder on your computer Extraction Wizard Select a
9. ht Monitoring Cable Cancel Help 7 Confirm the following warning with OK CT T T pe ona pot f f p Hegoelbacher Docklight Application Note ee E ee ee Low Latency Monitoring with Docklight Tap Win 7 Update _ 2011 11 28 Hej Applies to Docklight V1 9 Docklight Scripting V1 9 2009 0602 He Docklight Tap 2009 05 11 Schaar amp EZ Tap 2008 06 17 He Heggelbacher ne WwW fuh edv de Page Docklight Application Note Docklight_Application_Note_DocklightTap doc Expert Options A You have choosen Expert Options High Priority Mode This can influence other applications and basic Windows operations or even freeze block your computer completely Are you sure you want use this settings OK iE NOTE The above warning says it all since the amount of CPU time required by Docklight is directly dependent on the amount of data you are monitoring your PC can become irresponsive if Docklight receives more data it can handle amp process at the same time If in doubt try with the default setting Internal first before you active External High Priority Process mode 8 Press Start Communication F5 in Docklight and start your monitoring application The Docklight data acquisition is now running in an external high priority process and the monitoring accuracy should be as listed in section 1 lt Docklight Scripting V1 9 15B vi Stop Communication Fa mx FAAR Za
10. klight_Application_Note_DocklightTap doc 2 Start Docklight V1 9 or Docklight Scripting V1 9 choose the menu Tools gt Project Settings and select Communication Mode Monitoring For Receive Channel 1 and Receive Channel 2 select the TAP ports available from the from the dropdown lists e g TAPO and TAP1 For optimum performance use the additional settings described in Section 5 Low Latency Setup for RS232 monitoring 3 Review and adjust the COM Port Settings baud rate parity and confirm all settings with OK 4 Press Start Communication F5 in Docklight and start your monitoring application Please see the following sections for additional technical background information and how to achieve best performance for your RS232 monitoring application 3 Limitations in PC Windows based RS232 monitoring Many RS232 monitoring applications including Docklight can only provide limited accuracy when it comes to time tagging the serial data As a result data from the two different communication directions can be displayed in chronologically incorrect order or several telegrams from one communication direction can appear as one chunk of data This behavior is not caused by poor programming but rather a limitation of the PC Windows system architecture and the various hardware and software layers involved Unspecified delays and timing inaccuracies can be introduced by e The COM device s UART e g the internal FIFO First I
11. lt lt oO lo Docklight_Application_Note_DocklightTap doc Once the Docklight Tap driver has been correctly installed the Docklight Tap will appear in the Windows Device Manager as follows Universal Serial Bus Controllers gt USB Serial Converter A and USB Serial Converter B Ports COM amp LPT gt 2x USB Serial Port e g USB Serial Port COM7 and USB Serial Port COM8 y Device Manager Noles Ss File Acton View Favorites Window Help a B we Monitors BB Network adapters E E PCMCIA adapters Ports COM amp LPT a g F Communications Port COM 1 4 USB Serial Port COM l F USB Serial Port COM ol Processors A Secure Digital host controllers Sound video and game controllers g Storage volumes System devices 2 Universal Serial Bus controllers Generic USB Hub e I i z Intel R 82801F6 FBM USB Universal Host Controller 2658 g Intel R 8280 1FB FEM USB Universal Host Controller 2659 Intel R 82801F6 FBM USB Universal Host Controller 2654 Intel R 82801FB FBM USB Universal Host Controller 2658 n Intel R 3280 1FB FEM USB Enhanced Host Controller 265C USB Composite Device ool USB Mass Storage Device USB Printing Support USB Root Hub USB Root Hub USE Root Hub f USB Root Hub USE Root Hub er USE Serial Converter A gt USB Serial Converter B NOTE There is a good chance that you already have FTDI bus and port d
12. n First Out data buffer e The USB bus when using USB to Serial converters e The serial device driver for Windows e The task process scheduling in a multitasking operating system like Windows e The accuracy of the date time provider Docklight V1 9 introduced a new time provider for time stamps with real milliseconds accuracy If you compare the result to other Windows serial monitoring applications you will find that these applications come with milliseconds resolution too but the actual granularity of the time stamp is many times larger and can go up to 15 milliseconds This is because of the standard Windows time provider update interval which e g is around 15 milliseconds on Windows XP Docklight V1 9 also uses a high speed API available for the Docklight Tap chipset FTDI D2XX instead of virtual COM port drivers This results in best in class latency times and data throughput 4 Reference Configuration We have tested the Docklight Tap successfully using the following reference configuration e ASUS EeePC 1000H netbook 1 6 GHz Intel Atom processor 2 GB Ram e Windows XP Professional Version 2002 Service Pack 3 e Docklight Tap connected directly to built in USB port no USB hub used No other USB device connected besides the Docklight Tap and the pointing device mouse e Docklight Tap drivers installed according to section 6 below e Docklight V1 9 or Docklight Scripting V1 9 e User account with Administrator privilege
13. ng Docklight Tap is connected to the PC using a USB standard cable Its software driver adds two USB serial converters in Windows These can be accessed for full duplex passive monitoring using Docklight Communication Mode Monitoring Using the setup described in the following sections typical monitoring performance is as follows e Correct chronological order when monitoring communications with inter telegram delays of 5 milliseconds or more e Date time stamp accuracy better than 5 milliseconds For technical data and dimensions see our Docklight Tap Product Information Sheet 2 2 Quick Start 1 Make sure you have installed the latest Docklight Tap USB drivers FTDI device drivers On Windows 7 and Windows Vista this is fully automatic just plug in the Docklight Tap USB cable and Windows Update will download and install the correct drivers if required For Windows XP the drivers can be downloaded from the following link htto www docklight de download Docklight Tap Drivers zi For details see Section 6 Driver Installation Ppt 2011 11 28 O Poth Heggelbacher po cktight Application Note a V1 2 mi Po Low Latency Monitoring with Docklight Tap in 7 Update 2011 11 28 He Applies to Docklight V1 9 Docklight Scripting V1 9 2009 06 02 e Docklight Tap 2009 05 11 Schaar amp Page EZ Tap 2008 06 17 Heggelbacher Docklight Application Note 1 10 www fuh edv de 3 2 Doc
14. rivers on your PC and after connecting the Docklight Tap the drivers are installed fully automatic In this case check the driver version for both USB Serial Converter A B and USB Serial Port COM7 COM8 Update the drivers if necessary USB Serial Converter A Properties Leg USB Serial Port COM7 Properties General Anschlusseinstellungen Driver Details USB Serial Port COM of 5 USE Seral Converter Driver Prowider FTO Driver Date 1702 2009 Driver Provider FTE Driver Date 1702 2009 Driver Version 24160 Driver Version 7416 0 Digital Signer Microsoft Windows Hardware Compatibility Publi Driver Details To view details about the driverfiles Digital Signer Microsoft Windows Hardware Compatibility Publi Driver Details To view details about the driverfiles Update Driver To update the driver for this device f the device tails after updating the driver roll Pol Back Dever back to the previously installed driver To uninstall the driver Advanced Update Driver To update the driver for this device If the device fails after updating the driver roll Bol Back Davee back to the previously installed diver Uninstall To uninstall the diver Advanced CPt J 2019 11 28 pth Heggelbacher_ pocktight Application Note E eee ae Low Latency Monitoring with Docklight Tap Win 7 Update 2011 11 28 He Applies to Docklight V1 9 Docklight Scripting V1
15. s Update After plugging in the Docklight Tap USB cable the device drivers are installed automatically if required Driver Software Installation 7 Installing device driver software USB Composite Device wf Ready to use Dual R5232 in stalling driver software Dual R5232 Installing driver software A Driver Software Installation Your device is ready to use USB Composite Dewice T Ready to use USB Serial Converter A af Ready to use USB Serial Converter B wf Ready to use USB Serial Port COMIT wf Ready to use USB Serial Port COM16 wf Ready to use If in doubt open the Windows Device Manager and make sure that both the two USB Serial Port COMxx COMyy and the USB Serial Converter A B devices are appearing with correctly installed FTDI device drivers ey Device Manager File Action View Help i B i e a Network adapters USB Serial Converter A Properties 4 PCMCIA adapters 5 cea i Ey O2Micro OZ711EZ1 MZ1 MemoryCal General Advanced Driver Details a Ports COM amp LPT 1 USB Serial Port COM16 i13 USB Serial Port COM17 T Processors Driver Provider FTDI DP Security Devices Driver Date 18 03 2011 JERS Sens ensors Driver Version 2 8 14 0 USB Serial Converter A amp Sound video and game controllers lt gt Storage controllers Digital Signer Microsoft Windows Hardware Compatibility Publish JE System devices 4 9 Universal Serial Bus controllers To view
16. s to allow Docklight to control the process priority to a maximum extend O T T pe oa gt l f Heggelbacher Docklight Application Note mi PAuth Flachmann Low Latency Monitoring with Docklight Tap V1 2 mi 3 Win 7 Update 2011 11 28 Applies to Docklight V1 9 Docklight Scripting V1 9 2009 0602 He Docklight Tap 2009 05 11 Flachmann amp Page EZ Tap 2008 06 17 gt Heggelbacher Docklight Application Note 2 10 Name www fuh edv de a Docklight_Application_Note_DocklightTap doc 5 Low Latency Setup for RS232 monitoring After successfully installing the Docklight Tap USB drivers perform the following configuration steps 1 Disconnect LAN WLAN or any other network connection not needed during the test to avoid performance limitations due to automatic update operations a s o NOTE We do NOT recommend unloading or deactivating any Antivirus or Internet Security software Log on as an Administrator Start Docklight V1 9 or Docklight Scripting V1 9 choose the menu Tools gt Project Settings and select Communication Mode Monitoring For Receive Channel 1 and Receive Channel 2 select the TAP ports available from the from the dropdown lists e g TAPO and TAP1 Project Settings Communication Flow Control Communication Filter Communication Mode l 1 2 Monitorin Dend Receive OWS g receive sid Recernve Channel 1 Receive Channel 2 COM ba USB Monitoring Tap e g TAPO bee the
17. v de Flachmann amp Heggelbacher Waldkirchbogen 27 D 82061 Neuried Munich Germany http www fuh edv de 8 References 1 Docklight V1 9 User Manual from edition 04 2009 http www docklight de pdt docklight_manual pdf 2 Docklight Tap Product Information Sheet http www docklight de pdt docklight_tap paf O O T T pe 2071 11 28 p of S f p Hegoelbacher Docklight Application Note E es ee E Low Latency Monitoring with Docklight Tap Win 7 Update 2011 11 28 He Applies to Docklight V1 9 Docklight Scripting V1 9 2009 0602 He Docklight Tap 2009 05 11 Flachmann amp Page EZTap _ 2008 06 17 He Q 7 Heggelbacher Docklight Application Note 10 10 www fuh edv de
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