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Altera_Forum's avatar
Altera_Forum
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13 years ago

Avalon- Wishbone Wrapper OpenCores CAN Protocoll Controller

Hi, I know that this has been discussed in some old threats but I could not get some real help from those. I want to use the CAN Protocoll Controller in my NIOSII system designed with QSYS. I t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

I don't have the time to carefully analyze your code now.

Just a few question which could help to identify your problem:

- do you connect to a CAN device on the other side or do you test the core without bus connection?

- are timing registers correctly configured for the bus baudrate? IIRC 25MHz clock frequency is generally not used for CAN since you can't achieve all standard baudrates; if you can have it, use 24MHZ or 48MHz.

- Do you see any waveform on bus lines when you call the send_msg the first time?