How can I use a stepper extender on the SKR 1.4 using TMC2208 in UART mode ?

bigtreetech / BIGTREETECH-SKR-V1.3

32bit board with LPC1768, support marlin2.0 and smoothieware, support lcd2004/12864, On-board TMC2130 SPI interface and TMC2208 UART interface no additional wiring is required

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How can I use a stepper extender on the SKR 1.4 using TMC2208 in UART mode ? #507

Closed rafik24 closed 3 years ago

rafik24 commented 3 years ago

Hi, I am using an SKR 1.4 Turbo and I am adding 2 extra extruders stepper motors, for the first I am using a TMC2208 in UART mode on the E1 connector. However for the third motor I am using a TMC2208 on an expender boar on exp1 pins for STEPS/DIR/EN.

I there a way to connect the PDN(UART) pin to the SKR 1.4 pins (Could maybe use the RX0 and TX0 pins of the TFT connector ? If yes what are these pins numbers / P1_XX ??)

Could you please help ?

Thanks in advance, Rafik

radek8 commented 3 years ago

https://github.com/bigtreetech/BTT-Expansion-module/blob/master/BTT%20EXP-MOT/BTT%20EXP-MOT%20V1.0-SCH.pdf

radek8 commented 3 years ago

rafik24 commented 3 years ago

Thank you so much @radek8 for your prompt response pointing me in the right direction.

I ordered an extension board so tomorrow will be the day of trialing.

Many thanks !!!

rafik24 commented 3 years ago

Hi,

Received the expander board and configured the pins in klipper and all is working great.

Many thanks !