CAN Bus logger: Difference between revisions

Latest revision as of 18:04, 27 February 2020

The script shown below will output all CAN bus messages received on CAN channel 1 to the RaceCapture/Pro log window.

This is useful for seeing raw data from the CAN bus and can serve as a general diagnostic aid.

Using the CAN Bus logger

Use the CAN bus logger script preset (see below) to enable logging
- Note: Ensure any existing script is erased before copying in this logger script.
Set the correct baud rate in RaceCapture's CAN Settings page
- Typical baud rates are: 250000, 500000 and 1000000
- It's a good idea to also set the same baud rate in the CAN Bus configuration view.
Click the write configuration button (down arrow button on left) to write the script to RaceCapture/Pro.
Check the check box to poll the log file. This will cause messages from the script to show up in the bottom window.
Click the circular-arrow button to re-load the script.

Script

Use the Preset

We recommend using the provided preset for the CAN bus logger - just press Preset below the scripting window.

Note: You may need to update your presets by pressing the cloud update button.

Watching for messages

If RaceCapture/Pro is receiving CAN bus messages, you will see them in the window below the script.

I don't see data

If you don't see the CAN bus messages you were expecting, there could be a number of issues:

Baud rate is incorrect. Determine the correct baud rate for the BUS and try agian.
Bus termination is incorrect. RaceCapture/Pro has built in CAN bus termination. Ensure your CAN bus is balanced with terminators on each end.
Interference / poor wire connection. Try shortening the wire or checking the connections.
Incorrect Wiring for CAN bus connections. See the Quick Reference for the pinout for the CAN bus connections. Ensure you're connected to the CAN bus used in the script (CAN 1 is the default for the script).
Reversed CAN High and CAN Low wiring. Re-check the wiring.

Advanced: Using a Terminal Program

To gather large amounts of data, we recommend connecting directly to RaceCapture/Pro's serial console using a terminal program like Hyperterminal, RealTerm, minicom or similar.

Close the RaceCapture app
Connect to the RaceCapture device using HyperTerminal, RealTerm or Minicom using the COM port assigned by the operating system.
Press <Enter> to see a list of commands
View the log by issuing the command 'viewLog' at the serial console.
You will see a dump of the CAN bus data to the screen.

@@ Line 1: / Line 1: @@
-The following script will output all CAN bus messages received on CAN channel 1 to the RaceCapture/Pro log window.
+The script shown below will output all CAN bus messages received on CAN channel 1 to the RaceCapture/Pro log window.
-After writing the script, you can observe the output in the log monitor window in the RaceCapture app.
+This is useful for seeing raw data from the CAN bus and can serve as a general diagnostic aid.
-However, to gather large amounts of data, we recommend connecting directly to RaceCapture/Pro's serial console using a terminal program like Hyperterminal, RealTerm, minicom or similar.
+==Using the CAN Bus logger==
+* Use the CAN bus logger script preset (see below) to enable logging
+** '''Note:''' Ensure any existing script is erased before copying in this logger script.
+* Set the correct baud rate in RaceCapture's '''CAN Settings''' page
+** Typical baud rates are: 250000, 500000 and 1000000
+** It's a good idea to also set the same baud rate in the CAN Bus configuration view.
+* Click the write configuration button (down arrow button on left) to write the script to RaceCapture/Pro.
+* Check the check box to poll the log file. This will cause messages from the script to show up in the bottom window.
+* Click the circular-arrow button to re-load the script.
-* You can view the log by issuing the command 'viewLog' at the serial console.
+[[Image:RaceCapture_CAN_bus_logger_scrip_view.png]]
+==Script==
+===Use the Preset===
+We recommend using the provided preset for the CAN bus logger - just press '''Preset''' below the scripting window.
+* '''Note''': You may need to update your presets by pressing the cloud update button.
-<pre>
+==Watching for messages==
---500K baud. set your baud rate here.
+If RaceCapture/Pro is receiving CAN bus messages, you will see them in the window below the script.
-initCAN(0, 500000)
-setTickRate(30)  --onTick() will be called at 30Hz.
+==I don't see data==
+If you don't see the CAN bus messages you were expecting, there could be a number of issues:
+* Baud rate is incorrect.  Determine the correct baud rate for the BUS and try agian.
+* Bus termination is incorrect. RaceCapture/Pro has built in CAN bus termination. Ensure your CAN bus is balanced with terminators on each end.
+* Interference / poor wire connection. Try shortening the wire or checking the connections.
+* Incorrect Wiring for CAN bus connections. See the [[RaceCapturePro#Quick_Reference|Quick Reference]] for the pinout for the CAN bus connections. Ensure you're connected to the CAN bus used in the script (CAN 1 is the default for the script).
+* Reversed CAN High and CAN Low wiring. Re-check the wiring.
---this function drains all pending CAN messages
+==Advanced: Using a Terminal Program==
---and outputs messages to the log
+To gather large amounts of data, we recommend connecting directly to RaceCapture/Pro's serial console using a terminal program like Hyperterminal, RealTerm, minicom or similar.
-function outputCAN()
-	repeat
+* Close the RaceCapture app
-		id, ext, data = rxCAN(0, 100)
+* Connect to the RaceCapture device using HyperTerminal, RealTerm or Minicom using the COM port assigned by the operating system.
-		if id ~= nil then
+* Press <Enter> to see a list of commands
-			print(id ..', ')
+* View the log by issuing the command 'viewLog' at the serial console.
-			for i = 1,#data do
+* You will see a dump of the CAN bus data to the screen.
-				print(data[i] ..', ')
-			end
-			println('')
-		end
-	until id == nil
-end
-function onTick()
-	outputCAN()
-end
-</pre>