RP2040 CANbus implementation

This implementation only does CAN 2.0B which is ancient, all patents should have expired by now.
Bosch sell licences CAN protocol | Bosch Semiconductors for Automotive

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Hi @Bondus do you have a schematic or something like that for this? Iā€™m pretty interested in trying to making one. Or if you can tell me what CAN transceiver chip you used?

Hello everyone. I am implementing a program for working with droneCAN and RP 2040-zero. I encountered such a problem that messages are not sent from can2040. I send heartbeat so that droneCAN sends me a message, but in the end, as it turns out, messages are not sent at all, I am attaching the code and logs from the program. Maybe someone has encountered this? Or can help? (I will immediately answer that the connection via RX and TX is correct, there is a resistance of 120 ohms)
code.txt (6.2 KB)
Logs:
Statistics can output all 0, and output heartbeat send