TMS320F28075: How to receive a CAN message on CANA and transmit it on CANB.

Hello Carsten,

Thank you for you question. Unfortunately, there is no direct way to do this purely in hardware. However, it is worth noting that this can be done efficiently by immediate transmission at CANB upon reception at CANA (using interrupts). Further efficiency can be gained by viewing the disassembly and reducing cycles (potentially by writing parts of the interrupt in assembly).

My assumption is that this system will have two separate CAN busses, and you would like a bridge between the two busses. If this is the case, then please view the following CAN repeater reference design that may be able to assist with this (and provide isolation if needed):

https://www.ti.com/tool/TIDA-01487

If this is not the case (if it is a single bus), then it may be more effective to simply utilize the bus traffic instead of re-transmitting to the network.

Regards,

Vince

Hi Vince,

We hoped that it was possible to fix in the HW setup but we had our doubt.

Thanks a lot for your quick response and answer.

Best regards,

Carsten