Remora - Rpi Software Stepping Using External Microcontroller via SPI

Scotta,

If these boards dont come back much after the shortage what are the options?
Port to a stm32 based board?

STM32's are also hard to find right now, but that won't last forever.

I'm looking at porting this to STM32 for the future. Feel free to beat me too it

Speaking of that, Im not exactly sure how it all works, but embed is like arduino ide but better? So porting it to supported hardware is easier, and only hardware related things need addressed?

wow! thanks very much
you have been very very busy!
keep on truckin, I'll be fine
tomp

Hello,
Is there a difference between the diagram for skrv1.3 spi cable and your cable foto?
The disgram on readthedocs show a wire from what is labeled "p1.31" ( pin 4 of EXP2)
but your foto shows that socket empty., and instead a wire is connected to 3.25. ( pin 6 of EXP2)
Do I correctly see p1.31 is empty in your foto?
I am not geting the expected results and want to try correctly.
I just tried with what i see in the foto and still get bad spi ffffffff hitting F1 estop repreatedly
I then moved the 'reset' wire to the p1.31 and got same
Then I tried external 12V ps for skrv1.3
using screw terminal  '12/14' and GND, moved jumper from 5V to INT.
Result is same ( spi cable is from p1.35 on skr to reset gpio25 on rpi 3B+)
also tried with reset line from p3.25 to rpi gpio25, same ffffffff

it does not work as expected
but i DO need to resolve the diagram vs foto for later

the pin in question really is p1.31 and really is on pin2 of EXP2.
(not on pin 6 ). This is from the SKR V1.3 config.txt.

My skr v1.3 is no longer a candidate for Remora.
I have recieved an MKS v1.3 and will make an SPI cable for that.

thanks,
tomp
 

Tomp, you only need the 4 SPI connections and ground for SPI to work. If you have any questions about your wiring, Look at how he labeled the SPI signals on the EXP2 connector and then find any rPi pinout and look for the pins with the same SPI name.

I have even wired this thing wrong once and when I went back I realized it was looking at a connector backwards. When I look at rPi pinouts and signal names and make sure they match what Scotta shows for the EXP2 connector it works. Following wires and colors drives me nuts and signal names are the key IMO.