IWR6843: Receiving CAN data not working

Lachie Hill

Part Number: IWR6843

Hi,

I'm using the can-fd driver to send and receive CAN classic frames in the mmwave demo. Tx is working fine, but if there are any incoming CAN frames the program stops working and I have to power cycle the chip. I'm trying to eventually send the configuration commands via CAN. But for now I'm just trying to see if I can even print can frames with CLI_write. The driver is configured using the parameters from the document www.ti.com/.../spracf7.pdf, do I need to change some parameters? I've tried just calling CLI_write in the MCANAppCallback to print rxData to cli, which obviously didn't work. I also tried setting a flag in the callback and then calling CLI_write in another task without success. Do I need to create a task that monitors gRxPkts and processes them as they arrive? I can't seem to find a can rx example.

Thanks,

Lachie

over 4 years ago

0 Yogesh Siraswar over 4 years ago

TI__Mastermind 20765 points

Hi Lachie,

You should be able to print if you are sending only 1 frame. But if you are sending multiple frame, I will suggest to send a pattern and check that pattern internally and increase the rx packet count to know if the receive is working.

Thanks

Yogesh

0 Lachie Hill over 4 years ago in reply to Yogesh Siraswar

Prodigy 60 points

I‘m just trying one frame and it not working. The radar just crashes whenever the frame is sent to it. As I said above, I tried also putting a CLI_write of the frame data in MCANAppCallback but still nothing. Sending frames works though so I assume the can driver is working properly.

Is there a demo somewhere that receives CAN packets that I could see?

Thanks,

Lachie

0 Yogesh Siraswar over 4 years ago in reply to Lachie Hill

TI__Mastermind 20765 points

Hi Lachie,

You can refer to test code @C:\ti\mmwave_sdk_03_05_00_04\packages\ti\drivers\canfd\test\xwr68xx

Thanks

Yogesh

0 Lachie Hill over 4 years ago in reply to Yogesh Siraswar

Prodigy 60 points

I've used that code and i still cannot get the receive to work. If you had to put a receive that prints can messages on the can demo how would you do it?

0 Vaibhav Mahimkar over 4 years ago in reply to Lachie Hill

TI__Mastermind 23725 points

Hello

Sorry about the delay on our part.

Do you see the issue even on the send side or is it receive related only?

Is it possible to confirm if the electrical phy connections are sound and issues seem to be on the logical transactions side.

Thank you,

Vaibhav

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IWR6843: Receiving CAN data not working