DavidBoJ

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mcp251xfd spi0.0 can0: Transmit Event FIFO buffer not empty 2-CH CAN FD HAT Rev2.1

My controller is still working testing it with cangen. However I have another system a waveshare carrier board with cm4 and isolated CAN 2.0B https://www.waveshare.com/wiki/Template:Compute_Module_4_PoE_4G_Module_Spec Here a snippet of /boot/config.txt:...

mcp251xfd spi0.0 can0: Transmit Event FIFO buffer not empty 2-CH CAN FD HAT Rev2.1

Here it is I renamed the file so we don't get confused with the mcp251xfd. [config_cm4.txt](https://github.com/raspberrypi/linux/files/9070803/config_cm4.txt) What error messages? There is no errors in the syslog related to mcp2515 or...

mcp251xfd spi0.0 can0: Transmit Event FIFO buffer not empty 2-CH CAN FD HAT Rev2.1

I want to point out that the carrier board has good lightning-proof, and ESD protection. I think better than the HAT CAN FD controller and I am still concerned about...

mcp251xfd spi0.0 can0: Transmit Event FIFO buffer not empty 2-CH CAN FD HAT Rev2.1

Your suggested config.txt on Pi 4

mcp251xfd spi0.0 can0: Transmit Event FIFO buffer not empty 2-CH CAN FD HAT Rev2.1

I have not tried out your last proposal (speed=10000000) because I discovered that your config.txt file didn't allow me enable a can1 network. I get pi@cilix-19:~ $ sudo ip link...

mcp251xfd spi0.0 can0: Transmit Event FIFO buffer not empty 2-CH CAN FD HAT Rev2.1

I have now flashed my carrier board with Bullseye I have not CODESYS installed, so it is as simple as possible. Then I connected my Pi 4 with the FD...