TMCStepper VS TMC429

Now take a look at the header file of the library TMCStepper you want to use, https://github.com/teemuatlut/TMCStepper/blob/master/src/TMCStepper.h

(...) /** * Beta feature! * Create a 50/50 square wave step pulse optimal for stepper drivers. */ //#define SQUARE_WAVE_STEPPING /** * Enable M122 debugging command for TMC stepper drivers. * M122 S0/1 will enable continuous reporting. */ //#define TMC_DEBUG /** * You can set your own advanced settings by filling in predefined functions. * A list of available functions can be found on the library github page * https://github.com/teemuatlut/TMCStepper * * Example: * #define TMC_ADV() { \ * stepperX.diag0_otpw(1); \ * stepperY.intpol(0); \ * } */ #define TMC_ADV() { } Any thoughts?

My problem is that the library I'm using for the TMC2208 is made for the AVR architecture which means the ESP8266 seems to be incompatible with the code. I belive I have a few options.

* https://github.com/teemuatlut/TMCStepper

The library is called TMCStepper, and this issue suggests softwareserial cannot be used. I have tested it myself and can confirm this. Solution would be to get an ESP32 that has multiple hardware serial connections.

I looked into the code and it turns out that TMCstepper makes use of basically 2 functions to write to the register (here lines 187 and 281), so should the example given above not work you have a second option !

Ok this makes a lot more sense. Does the TMC429look like it will work for you? You have 4 connections to the driver chip to the motor. 2 connections from the driver to the Arduino, the Arduino just needs the connection from the marlin microcontroller. So the wiring should be 4 data on the Arduino, 2 going the TMC, then 6-8 to motors.