Followup to #17351

4 years ago · 11ce281694
1 changed files with 1 additions and 1 deletions
--- a/Marlin/src/module/stepper/trinamic.cpp
+++ b/Marlin/src/module/stepper/trinamic.cpp
@ -341,7 +341,7 @@ enum StealthIndex : uint8_t { STEALTH_AXIS_XY, STEALTH_AXIS_Z, STEALTH_AXIS_E };
        ptr[a] = p; return false;
      };
    } sp_helper;
-    #define HW_SERIAL_BEGIN(A) do{ if (sp_helper.began(TMCAxis::A, &A##_HARDWARE_SERIAL)) \
+    #define HW_SERIAL_BEGIN(A) do{ if (!sp_helper.began(TMCAxis::A, &A##_HARDWARE_SERIAL)) \
                                         A##_HARDWARE_SERIAL.begin(TMC_BAUD_RATE); }while(0)
    #if AXIS_HAS_UART(X)
      #ifdef X_HARDWARE_SERIAL