Remora - Rpi Software Stepping Using External Microcontroller via SPI

It's very very early days, but I've managed to send SPI packets on a RPi 5 from LinuxCNC using the low level RP1 memory mapped peripheral. Hopefully we can get RPi 5 support for Remora up and going.

 

I came across this a while ago, have not looked into it though:
github.com/praktronics/rpi5-rp1-spi

Sounds like it's probably a bit late now to help you out much, but just thought I would mention it anyway.

In fact, it is that exact work that has got me started. A great starting point to build from.

SKR 1.4 uses LPC1768

I think the remora w5500 firmware is only for stm32, and not for the LPC1768/9

Raspberry Pi 5 support

As you may have seen in the rp1lib thread, I've been working on RPi 5 SPI support for LinuxCNC. It's ready for some testing and feedback!

github.com/scottalford75/Remora/tree/mai...omponents/Remora-spi

This version of the Remora component will detect which Raspberry Pi version it is running on and load the appropriate SPI and GPIO drivers, BCM2835 or rp1lib.

For the Raspberry Pi 5 there is future features that will need to be added to the loadrt command line:

1. The RPi 5 has 5 SPI instances available on the header
2. Each SPI instance has a choice of 2 - 4 chip select GPIO pins
3. Different method to configure frequency

For those that wish to test, remember this is a Beta version. Bugs may still be present.