Hi Guys,
I have a doubt about the FlexCan simulink block from NXP,i wanna use the CAN PACK block with the FlexCAN block ,like as the Can block from TI,shown as below:
becasue the CAN Pack can load the DBC file shown above, we can give the value to the signal,then the eCan Trans block will send the signals out.
but the FlexCan block from NXP seems not connect the CAN PACK block in the simulink,because the dimensional is inconformity.
i have another question how can i send a 12 bit signal using the can block from NXP?
Hi edenli,
I do not have the Vehicle Network Toolbox license - but from the Matlab Help, the CAN PACK is going to output a full CAN frame message.
The NXP CAN block expects only the DATA payload (B7 - B0) (source)
Therefore, you need to de-serialized the message you get from the CAN PACK and extract DATA payload. Then since you need to transmit only 12bits you should keep only B0 and B1, pass it to the CAN Transmit and set up its length input to value 2 instead of 8.
That should to the trick.
Hope this helps!
Daniel
Hi Rui,
An example of PACK can be found here: How to Build and Configure a CAN with S32K to Emulate Automotive Body Control Infrastructure in the slave.mld model. (unpack example can be found in master.mdl)
I think its possible to import .c/.h which generated by Vector Geny tool, then call the signal function directly from Matlab.
Yes, there are multiples ways. Please check:
Tip #3: MBD Toolbox - Add custom code to your Simulink model
Tip #5: MBD Toolbox - Use S-Function to call your custom code anywhere in the model
or use Simulink Custom Code blocks
Hope this helps!
Daniel
Hi edenli,
I do not have the Vehicle Network Toolbox license - but from the Matlab Help, the CAN PACK is going to output a full CAN frame message.
The NXP CAN block expects only the DATA payload (B7 - B0) (source)
Therefore, you need to de-serialized the message you get from the CAN PACK and extract DATA payload. Then since you need to transmit only 12bits you should keep only B0 and B1, pass it to the CAN Transmit and set up its length input to value 2 instead of 8.
That should to the trick.
Hope this helps!
Daniel
Hi Rui Cui,
In case you have the Embedded Coder toolbox you could use the CAN Pack/Unpack blocks.
An example how to use it can be found here: https://community.nxp.com/thread/465130
Hope this helps!
Daniel
Hello Daniel,
Apparently, I didn't explain my question well. My question is similar as Eden Li: I want to load certain dbc first and then use S32K library/blocks to send my CAN message.
However, see following screenshot:
"FCAN_Send" need 8 bytes data. But by using "CAN Pack", the output data type is "CAN message", Matlab doesn't allow me to convert to any type. So I can't extract the data payload and convert to uint8.
Thanks,
Rui Cui
