save last extruder and set stepper directions too in case the extruder changed

fixes MarlinFirmware/Marlin#3144 and MarlinFirmware/Marlin#3083
9 years ago · 4338813814
parent 2ef49a9d53
commit 4338813814
1 changed files with 4 additions and 1 deletions
--- a/Marlin/stepper.cpp
+++ b/Marlin/stepper.cpp
@ -574,8 +574,11 @@ void set_stepper_direction() {
 // block begins.
 FORCE_INLINE void trapezoid_generator_reset() {

-  if (current_block->direction_bits != out_bits) {
+  static int8_t last_extruder = -1;
+
+  if (current_block->direction_bits != out_bits || current_block->active_extruder != last_extruder) {
    out_bits = current_block->direction_bits;
+    last_extruder = current_block->active_extruder;
    set_stepper_direction();
  }