Optimize target_extruder, ignore T with mixing (#12432)

* Optimize target_extruder, ignore T with mixing * Give G-code Tn parity with tool_change
2018-11-14 17:33:04 -06:00
parent 5e586a6b39
commit d2bb53702a
18 changed files with 150 additions and 138 deletions
--- a/Marlin/src/gcode/feature/trinamic/M906.cpp
+++ b/Marlin/src/gcode/feature/trinamic/M906.cpp
@ -73,7 +73,8 @@ void GcodeSuite::M906() {
        #endif
        break;
      case E_AXIS: {
-        if (get_target_extruder_from_command()) return;
+        const int8_t target_extruder = get_target_extruder_from_command();
+        if (target_extruder < 0) return;
        switch (target_extruder) {
          #if AXIS_IS_TMC(E0)
            case 0: TMC_SET_CURRENT(E0); break;