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4 changes: 3 additions & 1 deletion boards/RAMPS/pins_RAMPS.hpp
Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,9 @@
#define DEC_DRIVER_ADDRESS 0b00
#endif

#define SW_SERIAL_UART 1
#ifndef SW_SERIAL_UART
#define SW_SERIAL_UART 1
#endif

// DRIVER_TYPE_TMC2209_UART requires 4 digital pins in Arduino pin numbering
#ifndef AZ_STEP_PIN
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