Remora - Rpi Software Stepping Using External Microcontroller via SPI

i would be interested even in low speed ones for hand wheel encoders for manual operation.

Hand wheels/MPG may be read using any leftover GPIO. The STM32's have hardware cou8nters for high speed quadrature encoders.

I know the supply chains are still messed up and from what it sounds its going to be over a year till they are near normal.
With the fact that people can get the STM32 chips is this board going to become the main for remora project going forward?

Hi, I'm really enjoying the STM32 development version. A few things still to work out as time permits. Working on issues with the software serial implementation that is needed for TMC stepper drivers. Once this is done I'll be moving the board to my work horse 3D printer. Why?.. because the SPI communication is so much more stable and fast! I've not had one rejected SPI packet, but with the LPC1768 I've had 13hr print jobs fail half way through because of SPI data corruption.

So, will the STM32 become the focus moving forward? With the huge number of STM32 based boards I think it makes sense, but I am setting up the code base to abstract out the hardware better so its easier to maintain for both LPC and STM32 versions.

I need to get myself a STM32F1 based board to work on support for these common boards as well. Time, or lack off, is always an issue though....

That makes sense.
Now to dive into the stm boards and see what would fit best.
Seems this lpc board of mine may go into a printer once the stm32 board gets here

Very interesting
BTT is working on a H743 board (480mhz)

it could be the ultimate solution, i will try to port your code to H7XX once ur done.

It's just a board that uses a STM32H743II
www.st.com/content/st_com/en/products/mi...753/stm32h743ii.html

How available is this device?

The board is hopefully available from overseas resellers, the chip itself like every other stm32 is not available until at least q2 2022.

For those interested the testing repo for the STM32 version of Remora has been updated to include TMC UART driver support.

I need to get analog input (temperature) module up and running then a merge into one code base will be possible.

Im down to clown, but I have a few questions.
do I need to make a config file like the previous version, except with stm32 pin names?
Is motenable, PC_13 only other hardcoded pin? (not including sd, spi, tx/rx)
Do you think you can fudge up a board using an stlink to load the bootloader/firmware? .....asking for a friend.....