LIN Bus Demo
WWM_AE
北京普源精电科技有限公司
RIGOL TECHNOLOGIES,INC.
RIGOL TECHNOLOGIES, INC.
Preparation
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MSO/DS4000 Series (FW 00.02.02.05.02) with “SD-AUTO-DS4000” Option x 1
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DG1000Z Series Arbitrary Waveform Generator x 1
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USB Flash Device with “LIN.txt” file x 1
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BNC Cable x 1
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Power Cord x 2
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Step 1: Configure DG1000Z
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Insert USB Flash with “LIN.txt”to DG1000Z
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Verify current channel is set to CH1
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Press Store button
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Set File Type to Txt File
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Set Browser to Dir and select Disk D
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Set Browser to File and select file “LIN.txt”
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Press Read button
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Press Arb button
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Verify Mode is set to Sample Rate
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Verify the Sample Rate is set to 200kSa/s (other parameters using default value)
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Press Output button of current channel
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Connect the output to CH1 of MSO/DS4000 series
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Step 2: Configure MSO/DS4000
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Press Default button
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Set Vertical Scale to 1 V/div
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Set Horizontal Scale to 500 us/div
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Press Trigger MENU button
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Set Type to LIN
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Set Source to CH1
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Verify Trigger Level is set to proper value
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Set Version to 2.X
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Step 3: Trigger LIN Bus On Specified ID
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Set When to Identifier
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Set Identifier to 0
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Set Baud to 19200bps
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Set Sweep to Normal
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Press Decode1 button
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Set Decode to LIN
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Set BusStatus to ON
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Set Source to CH1
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Set Baud to 19200bps
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Set Version to 2.X or Both
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Set Parity to OFF
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Verify Threshold is set to proper value
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Step 4: Trigger LIN Bus On Specified ID&Data
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Set When to ID&Data
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Set Type to =
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Set Identifier to 3
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Rotate the multi-function knob to select CurrentBit and press down the knob to switch H or L.
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Verify the data is set to LLLHLLHL(Bin) or 12(Hex)
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Step 5: View Decoded Data
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Press Decode1 button
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Set Format to Binary
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Press Horizontal Scale Knob
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Adjust Horizontal scale and Horizontal position to view the decoded data.
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Step 6: Measure LIN Bus Bit Rate
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Adjust Horizontal Position to view the Sync
Break area at the beginning of the packet
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Set Horizontal Scale to 100us for clear
display of the waveform
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Press Cursor button and use manual cursor
to measure pulse with of the Sync pulses
•
Check pulse width with the bit rate in the
following table
LIN Bit Rate
LIN Sync Pulse Width
20 kbps
50 us
19.2 kbps
52.1 us
15 kbps
66.7 us
10 kbps
100 us
5 kbps
200 us
1 kbps
1 ms
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LIN Message Frame
LIN Message Frame Definitions
Break
Every LIN frame begins with the break, which comprises 13 dominant bits (nominal)
followed by a break delimiter of one bit (nominal) recessive.
Sync
The sync field is the second field transmitted by the master task in the header. Sync
is defined as the character x55.
Identifier
The ID field is the final field transmitted by the master task in the header. The LIN bus
provides a total of 64(0~63) IDs.
Data
The data bytes field is transmitted by the slave task in the response. This field
contains from one to eight bytes of payload data bytes.
Checksum
The checksum field is transmitted by the slave task in the response. The LIN bus
defines the use of one of two checksum algorithms to calculate the value in the eightbit checksum field.
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THANK YOU
RIGOL TECHNOLOGIES, INC.