Chamber Heater PID (#21156)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/gcode/config/M309.cpp

@@ -0,0 +1,48 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(PIDTEMPCHAMBER)
+
+#include "../gcode.h"
+#include "../../module/temperature.h"
+
+/**
+ * M309 - Set and/or Report the current Chamber PID values
+ *
+ *  P<pval> - Set the P value
+ *  I<ival> - Set the I value
+ *  D<dval> - Set the D value
+ */
+void GcodeSuite::M309() {
+  if (parser.seen('P')) thermalManager.temp_chamber.pid.Kp = parser.value_float();
+  if (parser.seen('I')) thermalManager.temp_chamber.pid.Ki = scalePID_i(parser.value_float());
+  if (parser.seen('D')) thermalManager.temp_chamber.pid.Kd = scalePID_d(parser.value_float());
+
+  SERIAL_ECHO_START();
+  SERIAL_ECHOLNPAIR(" p:", thermalManager.temp_chamber.pid.Kp,
+                    " i:", unscalePID_i(thermalManager.temp_chamber.pid.Ki),
+                    " d:", unscalePID_d(thermalManager.temp_chamber.pid.Kd));
+}
+
+#endif // PIDTEMPCHAMBER