Rigol SD-FLEXRAY-DS4 FLEXRAY BUS Serial Decode Option

• For the DS4000 Oscilloscope
• Software Key will be sent via email

FlexRay Decoding (Option)

Press Decode1 → Decode and select “FlexRay” to open the FlexRay decoding function menu.

1. Source - Press Source to select any channel (CH1 to CH4) as the signal source channel.

2. Signal Path - Press Signal Path to select the signal path (A or B) that matches the FlexRay bus signal.

3. Signal Type - Press Signal Type to select the type of signal that matches the FlexRay bus. The signal types available include BP, BM and TX/RX.

4. Baud - Press Baud to set the signal rate (2.5Mb/s, 5Mb/s or 10Mb/s) that matches the FlexRay bus signal.

5. Sample Point Position - The sample point is the point within the bit’s time.The oscilloscope samples the bit level at this point. “Sample Point” is expressed by the percentage of “the time from the start of bit to the sample bit time” in “bit’s time”.
Press Sample Point and use to adjust this parameter with a step of 1% and the range is from 5% to 95%.

6. Threshold - Refer to the introduction in “Parallel Decoding”.

7. Display-related Setting

• Press Package to set whether to display the FlexRay in package.
• Press Format to set the display format of the bus to Hex, Decimal, Binary or ASCII.
• Press Offset and use to adjust the vertical display position of the bus.
• Press BusStatus to enable or disable bus display.

8. Decoding Table
The decoding table lists the decoded data, the corresponding time and error information in table format. It can be used to observe relatively longer decoded data to solve the problem that some data could not be seen clearly on the screen.

Press Event Table → Event Table to select “ON” (note that this operation is only available when BusStatus is set to “ON”) to enter the decoding table interface as shown in the figure below. If an USB storage device is currently connected to the instrument, press Export to export the data table to the external USB storage device in CSV format.

9. Explanation of the Decoded FlexRay Frame Data
The decoded FlexRay frame data is as shown in the figure below.

• TSS: transmission start sequence and is expressed by light purple patch.
• Frame Type: FlexRay frame can be NORMAL, SYNC, SUP or NULL. The frame type in the figure above is “NOR” and is expressed by purple patch.
• Frame ID: decimal number and is expressed by blue patch.
• Effective Loading Length: decimal number and is expressed by brown patch.
• Head CRC: hexadecimal number and is expressed by blue-green patch. When CRC is invalid, it is expressed by red patch.
• Cycle Number: decimal number and is expressed by pink patch.

Data: displayed in the format (Hex, Decimal, Binary or ASCII) specified in Format and expressed by green patch.

End CRC: hexadecimal number and is expressed by blue-green patch. When CRC is invalid, it is expressed by red patch.

DTS: dynamic end sequence and is expressed by light purple patch.