TMC429 controlling 2 TMC2209 stepper drivers

[arkem709]

Has anyone had any luck controlling a TMC429 over SPI and two (2) TMC2209 stepper drivers over software serial UART as described in the datasheet?

I was able to setup the hardware as described in the datasheet, and set MS1 and MS2 pins to address them correctly in hardware. I can't find any example code that has a TMC429 sending step/direction to two(2) TMC2209 and software serial UART being used for the TMC2209.

[daniel-frenkel]

I think you can ditch the TMC429 completely and just run the TMC2209s using their built-in pulse generator. That would be much simpler. Or you can use the TMC5130 or TMC5160 which work with this library and have a built in ramp generator as well.