Quick Reference Manual V1.0 1
Contents 1.0 PRODUCT INTRODUCTION...3 2.0 SYSTEM REQUIREMENTS...5 3.0 INSTALLING PDF-D FLEXRAY PROTOCOL ANALYSIS SOFTWARE...5 4.0 CONNECTING TO AN OSCILLOSCOPE...6 5.0 CONFIGURE THE PDF-D SOFTWARE...11 5.1 SIGNAL INPUTS... 11 5.2 SIGNAL CONFIGURATION... 13 5.3 DATA REFERENCE... 14 5.4 DISPLAY OPTION... 15 6.0 RESULTS...16 6.1 DECODE TABLE INFORMATION... 16 6.2 LINKING DECODED FLEXRAY FRAME DATA TO WAVEFORM... 17 6.3 SHOW MORE DETAIL... 18 6.3.1 Overlay of decoded messages on the FlexRay waveform... 19 6.3.2 Eye Diagram Analysis... 20 6.3.3 Time Interval Error Plot (TIE Plot)... 22 6.3.4 Timing Measurements... 22 6.3.5 Sync Measurements... 23 6.4 FIND... 24 6.5 SAVE... 26 6.6 CLOSE THE DETAIL VIEW... 26 7.0 CLOSING THE PDF-D FLEXRAY DECODE ANALYSIS SOFTWARE...26 8.0 FEEDBACK...27 9.0 CONTACT INFORMATION...27 2
1.0 Product Introduction Engineers designing and integrating in-vehicle networks can monitor FlexRay protocol information in hexadecimal and decimal formats, analyze the electrical characteristics of a FlexRay signal using eye diagrams, time interval error plots and sync measurements with a Tektronix DPO/MSO4000 Series oscilloscope and the FlexRay Protocol Analysis Software The PDF-D FlexRay Protocol Analysis Software offers the best solution in the industry for debugging and testing of FlexRay signals using the award winning Tektronix DPO4000 and MSO4000 Series oscilloscopes. This software enables the designer to capture thousands of FlexRay messages and display the decoded data. The PDF-D FlexRay decode feature allows the users to view the decoded data in hexadecimal, decimal, octal and binary formats as specified. PDF-D Software overlays control and payload data of the FlexRay frame on the waveform for easy debugging FlexRay communication l issues. The protocol decode table highlights the header CRC, trailer CRC and eye diagram error frames (frames causing eye diagram failure) in red. 3
Signal Integrity Electronic control units (ECU s) should work in extreme operating conditions in an automobile. To ensure reliable operation of ECU s at extreme operating conditions, FlexRay signal should have enough design margins. PDF-D Software s signal integrity feature helps in quickly analyzing the electrical characteristics of FlexRay signal. Advanced features such as eye diagram analysis, time interval error plot, and sync measurements enables the user to know the eye opening, jitter, and synchronization in a FlexRay network. Features: Protocol decode Converts time domain waveform information into data domain and displays the contents in FlexRay message format Displays waveform and decoded data simultaneously in a single window allowing efficient debugging Ability to link any FlexRay frame or any message (data or address) to waveform allows efficient analysis of FlexRay communication Detailed view plots the waveform for the selected frame and overlays the decoded data on the waveform. Error frames are highlighted in red for easy debugging. Find function helps in quickly locating the specific data or address out of thousands of decoded FlexRay messages Time stamp with reference to trigger position allows users to know the time from the frame to the trigger event Offline analysis with Ref waveforms,.isf (Tektronix oscilloscope s internal waveform file format) and,.csv files Capability to save the decoded messages in.csv format Features: Signal Integrity Ability to view the eye diagram for selected message with the complete acquired data helps in pinpointing the cause for the eye diagram failure Quick analysis of the eye diagram as per FlexRay standard FlexRay frames causing eye diagram errors are highlighted in red in the decode table Time interval error analysis for each frames helps in understanding the influence of oscillator stability in each FlexRay node Sync measurements enable the user to know time lapse between the sync frames Average bit time measurement 4
2.0 System Requirements The following are the system requirements to install and use PDF-D FlexRay software OS RAM Disk Space Display Resolution Windows 2000 SP4, Windows XP SP2, Windows Vista 512 MB or more 10 MB or more 1,024x768 minimum 3.0 Installing PDF-D FlexRay Protocol Analysis Software The software requirements to install PDF-D Software on your PC are: TekVISA 3.3 or above version.net 2.0 Framework SP2 Follow the below steps to install the PDF-D Software. If your PC already has TekVISA and Dotnet framework software, you can skip step # 3 and 4. 1. Insert the PDF-D Software CD in the CD Drive of your PC. 2. Open the CD drive using My Computer or explorer. You will find the following files in the PDF-D Software CD dotnetfx.exe TekVISA. exe FlexRay Protocol Analysis Software VX.X.X.exe 3. To load dotnetfx.exe software, double click on dotnetfx.exe file. It will take you through the installation procedure of.net Framework software. 4. To load TekVISA software, double click on TekVISA.XXX.exe. Software will take you through the installation procedure. 5. To load PDF-D Software, double click on FlexRay Protocol Analysis Software V1.x.x.exe. Software will take you through the installation procedure. 6. At the end of the PDF-D Software installation, following icon is created in your PC desktop. FlexRay Protocol Analysis Solution.lnk 7. To launch the PDF-D Software, double click on the above shown icon. 5
4.0 Connecting to an Oscilloscope The PDF-D FlexRay Analysis Solution connects to an oscilloscope using TekVISA. To establish the connection between the oscilloscope and the application, you need to setup the oscilloscope and the PC. Configure the oscilloscope for USB connectivity TekVISA lets you use your MS-Windows computer to acquire data from your oscilloscope for use in an analysis package that runs on your PC, such as the PDF-D FlexRay Protocol Analysis software. You can use a common communications connection, such as USB, Ethernet, or GPIB, to connect the computer to the oscilloscope. To set up TekVISA communications between your oscilloscope and computer: 1. Load the VISA drivers on your computer. The TekVISA driver is provided with the CD you received with this software or with your oscilloscope. If you do not have a CD, you can download it from the Tektronix Web page (www.tektronix.com/software). 2. Connect the oscilloscope to your computer with the appropriate USB or Ethernet cable. 6
3. Press the Utility button on the oscilloscope front panel as shown below. 4. Press the Utility page in the oscilloscope menu. 5. Turn the multipurpose knob a on the oscilloscope and select I/O. 6. If you are using USB, the oscilloscope sets itself up automatically for you, if USB is enabled. Check USB on the lower-bezel menu to be sure that USB is enabled. If it is not enabled, press USB. Then press Enabled on the side-bezel menu. 7. To use Ethernet, press Ethernet Network Settings. If you are on a DHCP Ethernet network and are using a regular Ethernet cable to connect, on the side-bezel menu, set DHCP to On. If you are using a cross-over cable, set it to Off and set a hard coded TCP/IP address. After configuring the oscilloscope you need to configure TekVISA on your computer. 7
Configure TekVISA on your computer PDF-D FlexRay Analysis solution connects to the oscilloscope using TekVISA. To establish the connection between the oscilloscope and the application, you need to configure TekVISA on your computer. Steps to configure TekVISA: 1. Open the TekVISA Instrument Manager from Start Menu> All Programs >TekVISA> OpenChoice Instrument Manager as shown; 2. Click the Search Criteria button to configure the type of connection. 8
3. If you are using Ethernet, configure the network address as shown below and click Done. 4. Click Update in the Instrument Manager. You will then find your oscilloscope in the list of instruments. 9
5. To get an easier to recognize VISA name, select the instrument and click Properties. The following dialog box will appear. Provide a Device Name, for example DPO4000 and then click OK. 6. Click Update in the instrument list. You will find the newly created Device Name in the list of Instruments. 10
5.0 Configure the PDF-D Software Launch the FlexRay app by clicking FlexRay Protocol Analysis Solution icon on your PC desktop, The following screen appears when the application launches. Provide the new device name in the PDF-D FlexRay VISA Name and click Connect to Oscilloscope as shown. This interface allows you to set up the PDF-D application for FlexRay signal analysis. The three important components in configuration tab. Signal Inputs Signal Configuration Data Reference 5.1 Signal Inputs PDF-D allows you to input a FlexRay signal using CH1-CH4, Ref1-Ref4 or the Math channel on a DPO/MSO4000 Series oscilloscope. Using the drop down list you can select any of the channels. A FlexRay signal is a differential signal. You can probe the differential signal using a TDP0500 differential probe or with two single ended probes and a Ch1-Ch2 math function. This pseudo differential approach requires you to select the scope s Math waveform as the input. If you plan to probe the FlexRay signal using a TDP0500 probe: Connect the TDP0500 to any of CH1 to CH4 of DPO/MSO4000 Series oscilloscopes. Select CH1-CH4 in PDF-D depending upon the TDP0500 connectivity. For example, if TDP0500 is connected to CH1 in DPO/MSO4000 then select CH1 in PDF-D. 11
If you plan to probe the FlexRay signal using a pseudo differential method: Connect CH1 and CH2 of DPO/MSO4000 to BP and BM of FlexRay signal respectively. You can use the standard P6139A probes supplied with the oscilloscope. To get the differential FlexRay signal, set up the Math channel in DPO/MSO4000 Series oscilloscope as Math1 = CH1-CH2. Select Math in PDF-D depending upon the math channel configuration. If you want to analyze the single-ended FlexRay signals, use the following setup: Note: While conducting single-ended signal analysis, the eye-diagram feature is irrelevant, because the eye diagram analysis requires differential signal. Connect the BP or BM signals to any of CH1-CH4 of DPO/MSO4000 Series oscilloscope using P6139A probe. Select CH1-CH4 in the PDF-D software. If you want to analyze previously saved FlexRay waveforms: Load the FlexRay signals (.isf files) into any of the Reference channels of DPO/MSO4000 Series oscilloscope. Select Ref 1-Ref4 in the PDF-D Software. If you want to analyze FlexRay signals from a file: Load the FlexRay signal files using the file menu of PDF-D. PDF-D supports.isf and.csv files. 12
5.2 Signal Configuration Signal configuration enables you to input the characteristics of your FlexRay signal and test point information to the PDF-D Software. The signal configuration panel of PDF-D is as shown: Signal Type: This menu is used to select whether BP, BM or differential signal is used for analysis. Data rate: FlexRay supports 3 different data rates 10Mbps, 5Mbps and 2.5Mbps. Select the appropriate data rate using the drop-down list. Channel: FlexRay supports two channels for data exchange between FlexRay nodes. Many times one of the channels is used as for redundancy. Based on this selection the software computes the trailer CRC value and flags an error message if any difference is detected. You can select channel A or Channel B using the drop-down list. Eye Mask: This drop-down list enables you to select the Eye mask at test points TP1 or TP4. The FlexRay standard recommends eye diagram testing at test points TP1 and TP4. 13
5.3 Data Reference To analyze the FlexRay signals, PDF-D needs to identify the logical high and low transitions. For this, you need to provide the reference level as input. The reference level inputs can be specified as percentage or absolute units. The screen is as shown below. In the percentage mode, the PDF-D software measures the maximum and minimum amplitude of the FlexRay signal. If the Ref level is set as 50%, then any transition above 50% of amplitude is considered as logical 1 and below 50% of amplitude as logical 0.. 5% Ref Level (from 50% ref level) 50% Ref Level 5% Ref Level (from 50% ref level) Hysteresis level setup helps in isolating incorrect voltage transition occurring due to the electrical noise. 14
Any aberration (as shown in the above figure) within 50%+/-5% of 50% reference level is not considered a logical transition. The hysteresis level helps in isolating voltage transitions in the hysteresis region. If units are set to absolute, you can set the Reference level in volts. If the signal voltage amplitude is 5V then you can set Ref level at 2.5V. Hysteresis level can be 0.5V. Hide eye diagram error: By selecting this check box, PDF-D will not highlight the FlexRay frames causing an eye diagram error. 5.4 Display Option This menu allows you to configure the view of decoded FlexRay frame contents in different numerical formats. You can configure Frame ID, payload length, header CRC, cycle count, data and data annotation in hexadecimal, decimal, binary or octal numerical formats. To access display options, select Option in the menu bar. The following display appears. Use the drop-down list to select decimal, hexadecimal, octal or binary formats. This information is used to display the protocol decoded information of the FlexRay signal. Acquire Data: By clicking on acquire data, PDF-D software sends commands to the oscilloscope to acquire data using the current oscilloscope setup. The data is then imported into the PDF-D software, and the results are displayed. 15
6.0 Results The results tab displays the results after processing the acquired data. The results tab contains: Decode Table Show More Details Find Save 6.1 Decode table information The Decoded FlexRay frame contains the following information: Header Frame Type (FT) Reserved Bit (RB) Payload Preamble (PP) Null Frame Indicator (NI) Sync Frame Indicator (Sy) Start up Frame Indicator (St) Frame ID (F ID) Payload Length (PL) Header CRC (H CRC) Cycle Count (CC) Time Data Description Static Frame (S) or Dynamic Frame (D) Value of the Reserved Bit Payload Preamble in the Frame Header Displays the status of the Null Frame Indicator in the Frame Header Displays the status of the Sync Frame Indicator in the Frame Header Displays the status of the Start up Frame Indicator in the Frame Header Displays the Frame ID Displays the Payload Length of the Frame Displays the Decoded Header CRC value Displays the Decoded Cycle Count Displays the Start of the frame time from the Trigger Position Displays the Payload Data 16
The next figure explains the FlexRay frame content in a standard FlexRay frame. PDF-D displays the results as shown: Note that if the decoded data is displayed in hexadecimal, binary and octal formats then h, b, and o is appended to the data bytes. If it is in decimal format then there is no indication for the data bytes. 6.2 Linking decoded FlexRay frame data to waveform After the PDF-D completes the decoding, by default it zooms and places the cursors in the oscilloscope waveform. This waveform represents the first decoded frame in the decode table. You can scroll up and down the decoded table display. If you want to view the waveform for a particular FlexRay frames in decoded table, click on the frame. The waveform related to this frame is zoomed and cursors are placed at the start and end of 17
the frame in DPO/MSO4000. The DPO/MSO4000 oscilloscope display is as shown while linking the decoded frame to waveform. 6.3 Show more detail By selecting the Show More Details in the results panel, you can view the comprehensive analysis of the FlexRay frame. The following features are supported in detailed view. Overlay of decoded message on the FlexRay waveform Eye diagram analysis TIE plot Timing measurements Sync Measurements 18
A typical display of Show More Detail view along with the decoded table is as shown: 6.3.1 Overlay of decoded messages on the FlexRay waveform One of the components in detail view is the overlay of decoded messages on the FlexRay frame waveform. The component is displayed as shown: Fit to screen Pan/Zoom Undo The decoded information of the frame selected in the decode table is overlaid with the corresponding FlexRay waveform. To zoom this waveform: Step 1: Click on the pan/zoom button in waveform plot. Step 2: Move the mouse pointer over the waveform plot. Step 3: Click and drag to select the area to zoom on 19
To pan the zoomed waveform: Step 1: Click on the pan button. Step 2: Move the mouse pointer over the waveform plot. Step 3: Click and drag either left or right to pan left or right respectively To do undo the last action, click the undo button. 6.3.2 Eye Diagram Analysis The Eye diagram plot component in detail view is as shown. Maximize The eye diagram is built from all the FlexRay frames acquired in a single acquisition on the DPO/MSO4000 Series oscilloscope. The blue trace in the eye diagram is the eye for the selected frame in the decode table. To maximize the eye diagram plot area, click the maximize button eye diagram plot area, click.. To minimize the Eye diagram failures are highlighted in red as shown in the following figure. 20
The FlexRay frames causing these eye diagram failures are as also highlighted in red in the decode table as shown below. 21
6.3.3 Time Interval Error Plot (TIE Plot) This component of the Detail view offers the TIE plot for the selected frame. The plot is displayed as shown.. A TIE plot shows the time difference between the real clock and an ideal clock (standard specification) for each Unit Interval (UI) for the FlexRay frame selected in the decode table. The X axis of the TIE plot is UI and the Y axis is time in seconds. If the data rate is 10 Mbps, the UI is 100nsec (ideal clock). If the measured UI for each UI were 100nsec, then the plot would be a flat line at 0 seconds. If it varies against the reference UI value of 100nsec (for 10 Mbps), the difference value (measured UI value reference UI value) is plotted for each UI in the time axis. A UI increment starts from the beginning of the FlexRay frame. Using the TIE plot you can quickly observe the UI time variation in a selected frame. This UI variation might have occurred while data is being transmitted through the different segments of the network. Also, the impact of oscillator frequency variation in an ECU can be observed in a TIE plot. Electrical noise can impact the UI value which can be easily observed by a sudden change in UI value in a TIE plot. 6.3.4 Timing Measurements This component of the Detail view shows timing measurements for the selected frame. The measurements are displayed as shown. 22
The rise time is the amount of time the output voltage takes to reach from 20% to 80% of the amplitude. The fall time is the time the output voltage takes to reach from 80% to 20% of the amplitude. In PDF-D software rise and fall time are calculated for all the transitions in the frame and the average value is displayed. TSS duration is a programmable value in FlexRay nodes. The measured TSS value helps in identifying any TSS truncation issues due to signal paths in the network. 6.3.5 Sync Measurements This component in Detail view gives the following measurements. Previous Sync and Next Sync measurements measure the time lapsed and time at which next sync frame is expected for the selected frame. Previous Cycle Frame and Next Cycle Frame measurements measure the time lapsed for the same frame in previous communication cycle and time at which this frame is present in the next communication cycle. 23
6.4 Find Clicking on the Find button brings up the following dialog box You can find Frame Indicators, Frame Details, Frame Type and Error frames in the decode table. To search, do the following: Step 1: Select your search criteria in the Find menu Step 2: Enter the search value (if you are searching for Frame details) Step 3: Click on Find; PDF-D will search for frames meeting your criteria in the decode table. Step 3: If condition is present, that row is selected Step 4: To continue searching in rest of the decode table, click on Find until PDF-D displays following message. 24
You can also search for a combination of Find conditions. For example, search for Frame ID=14 and Data of Dh by setting the search conditions as shown below: You can also search for a combination of Frame details and Errors. For example to find frames with an ID of 24 that fail the eye diagram test, set the search conditions as follows: 25
6.5 Save The save feature allows you to save the decode table information in.csv file format. To save the data, click on the Save button. The following dialog appears: 6.6 Close the Detail View To close the Detail View, click on the close button at right corner of the Detail view display Or uncheck the Show More Details checkbox in the results panel.. 7.0 Closing the PDF-D FlexRay Decode Analysis Software To close the PDF-D FlexRay Decode Software, click on the close button at the right corner of the PDF-D Software user interface or by selecting Exit in the File menu. 26
8.0 Feedback Prodigy Test Solutions values your feedback on our products. To help us serve you better, please send us your suggestions, ideas, or comments on your application. Direct your feedback via email to contact@prodigytest.com and include the following information. Please be as specific as possible. General information: Oscilloscope model number and hardware options, if any probes used. Your name, company, mailing address, phone number, FAX number. Please indicate if you would like to be contacted by Prodigy Test Solutions about your suggestions or comments. Solution specific information: PDF-D software version number. Firmware version of the oscilloscope. Description of the problem such that technical support can duplicate the problem. If possible, save the oscilloscope setup files as a.set file. If possible, save the waveform on which you are performing the measurement as a.isf file. Once you have gathered this information, you can contact technical support by phone or through e-mail. If using e-mail, be sure to enter in the subject line PDF- D FlexRay Problem or PDF-D FlexRay Feedback and attach the.set and.isf files. 9.0 Contact Information Prodigy Test Solutions #15/130, 3 rd Floor, 1 st Cross, 8 th Main, BTM 1st Stage Bangalore 560029 Karnataka, India Email:contact@prodigytest.com Phone numbers: +91 80 26789555/+91 9880027949 27