Trinamic support question

[dresco]

Hi @terjeio

I would like to get Trinamic support into the H7 port (for the BTT SKR v3 board). I've bought a board with 2209 drivers for testing, and @Demitrius has a board with 5160 drivers on the way. Looking at the board pinouts, will need to use both soft UART and soft SPI.

Am looking at the F4 code as a starting point, and something puzzles me. The following code is not reached if built for 2209, as is inside an earlier #if TRINAMIC_SPI_ENABLE directive.. Is this a bug, or left over from the recent refactoring?

https://github.com/grblHAL/STM32F4xx/blob/be9965052f8ec7d0e56ccf56ca7c3c06123981cd/Src/btt_skr_2.0.c#L192-L204

[terjeio]

It is left over from refactoring. For soft UART tmc_uart.c is used. I'll remove the stray code in the next commit.

[dresco]

I've added TMC2209 support with soft UART, and appears to be working okay on my BTT SKR 3 board with 2209 drivers. Have pushed these updates to my H7 repo.

However, the TMC5160 is going to need a software SPI implementation for this BTT board, @terjeio I don't suppose you have anything like this already?

[terjeio]

Great. I do not have any soft SPI code at hand but it should be easier to implement than soft UART as the clock is supplied by the master when receiving data.

[dresco]

Cool, I'll keep an eye out for the TMC5160-BOB being back in stock anywhere & pick one up for testing..

[dresco]

Trinamic support for 2209 (soft UART) and 5160 (soft and hard SPI) is now in the H7 master branch.