Setting up TCM2208 Drivers

[CaptInsano]

As per most of the advice out there on the Anycubic i3 Mega, I have changed out the stock stepper drivers for the TCM2208. They are working perfectly under the stock firmware and are much quieter that the stock drivers.

I am now looking to change from stock firmware to Marlin to take full advantage of these drivers.

I have installed the TCM2208 library and under configuration.h, I have changed the driver settings:

`

define X_DRIVER_TYPE TMC2208

define Y_DRIVER_TYPE TMC2208

define Z_DRIVER_TYPE TMC2208

define X2_DRIVER_TYPE TMC2208

define Y2_DRIVER_TYPE TMC2208

define Z2_DRIVER_TYPE TMC2208

define E0_DRIVER_TYPE TMC2208

`

When compiling however i get the following errors:

stepper_indirection.cpp:299:32: error: 'X_SERIAL_RX_PIN' was not declared in this scope

followed for similar errors for Y, Z, Z2, E0 etc.

I have looked and looked but cannot find any obvious answer to this.

Where do I define the correct pins?

[newPOPE]

What is the reason for change firmware? I just change drivers, turn motors pins and setup voltage to 1.2V and everything works. As firmware I am using my fork of this because need to correct XYskew factor.

[derhopp]

You have to edit pins_TRIGORILLA_14.h .

From my experience it is worth utilizing the features of the communication to the stepper driver. E.g. hybrid mode or diagnostics... and much more.

[CaptInsano]

Thanks for the help.

Just had a look at the pins_TRIGORILLA_14.h file and I cannot see any X_SERIAL_RX_PIN variable to change as per the error above?

Thanks again!

[otherguy]

Following this because I still have the same thing on my to-do list.

As far as I'm aware you need to solder a Y-cable to the UART pin on the stepper driver and connect it to a free pin on the board. Then specify these pins in pins_TRIGORILLA_14.h.

[derhopp]

Simply add the necessary defines of the pin you have used for connecting the UART to the trigorilla to pins_TRIGORILLA_14.h yourself. But make sure that these pins aren’t used, as some processor pins have multiple connectors on the board or/and are not listed in the pins file.

The default firmware doesn’t have the defines, as the stock printer doesn’t have TMCs.

[otherguy]

@derhopp did you do that on yours? Any chance you could show a photo of where you connected the UART pins?

[derhopp]

I don't use TMC2208s but I use six TMC2130 with full SPI access. My I use the following pins... https://drive.google.com/open?id=1Fy8QxFAcTLMPc_V28V5CENHZI3NIAREf