Remora - ethernet

That is the intended behaviour and is telling you that the communication to the board is not working.

Did you change the line in the configuration.h file and recompile?

Line 640 in main.cpp also would need to be corrected from else if ((recBytes == 64) && (rxBuffer.header == PRU_WRITE))

to

else if ((recBytes == SPI_BUF_SIZE) && (rxBuffer.header == PRU_WRITE))

There could be other issues as well and I note that the code on github is by far not the latest as it is using a polling method for the W5500.

Thank you for your answer. Recompile does not work, mbed studio say lots of errors there. I used the available bin file. The logic analyzer does not see SPI communication. I have too little knowledge to solve it, so I give up and look for another alternative.

hey satsuna, are you using the octopus firmware in the ehternet repo? I never tried the ethernet ones yet. Ill give it a try tonight and see whats going on. what pins are connected to your w5500 => octopus ?

Hi cakeslob, I just followed the instructions:
remora-docs.readthedocs.io/en/latest/hardware/octopus.html

I think the wire is too long for SPI. There are several rules that must be followed for high speed, because SPI not will work well. If this works, a new board is required to function properly. Maybe a LAN8720 or similar would be better. and would use a very fast SPI line for the motor controls and each motor have an MCU that manage the motor and the encoder. SimpleFoc might be a good option and would avoid the step/dir/en logic.

Is Remora working on a BTT Octopus over ethernet? I don't have SPI available on the host, trying to find out what the max uart speed on the host PC is but from what I gather Remora only runs debug over uart. I've got extra ethernet ports so I can go that way assuming the Octopus does actual ethernet over the RJ45 and not just CAN

Lol maybe you're right, I didn't even look at it that good. I was planning on using Marlin over uart with a project but Marlin sucks.

So the only thing Remora can actually do with an Octopus is SPI then?

I should have paid a little more attention to the comments at the beginning of this thread. I didn't realize what the "w5500" was. Has anyone gotten Remora working over ethernet with the w5500 on an Octopus?

I dont think theres a problem with it working, Scott just tells me its not ready for the big time yet, he needs to work on some DMA stuff to make it better.

I should have that w5500 board today. I have Marlin sort of running on the Octopus I put in the PnP machine I just built but I'm not a fan of Marlin so I want to try running LinuxCNC through linuxcncrsh. That's a whole nother battle but if I can get Remora running on it with just a basic Axis config I'll probably stick with it and figure the rest out later.