Work around M303 E-2 issue by rewriting E-1 to E-2 automatically

matthewlloyd · Jul 4, 2021 · 12840af · 12840af
1 parent 6bc86d4
commit 12840af
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/lib/Marlin/Marlin/src/gcode/temperature/M303.cpp b/lib/Marlin/Marlin/src/gcode/temperature/M303.cpp
@@ -46,7 +46,7 @@ void GcodeSuite::M303() {
   #else
     #define EI H_BED
   #endif
-  const heater_ind_t e = (heater_ind_t)parser.intval('E');
+  heater_ind_t e = (heater_ind_t)parser.intval('E');
   if (!WITHIN(e, SI, EI)) {
     SERIAL_ECHOLNPGM(MSG_PID_BAD_EXTRUDER_NUM);
     return;
@@ -60,6 +60,10 @@ void GcodeSuite::M303() {
     KEEPALIVE_STATE(NOT_BUSY);
   #endif
 
+  // Llama: work around https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/798
+  if (e == -1)
+      e = (heater_ind_t) -2;
+
   thermalManager.PID_autotune(temp, e, c, u);
 }