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+/**
+ * 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(SKEW_CORRECTION_GCODE)
+
+#include "../gcode.h"
+#include "../../module/planner.h"
+
+/**
+ * M852: Get or set the machine skew factors. Reports current values with no arguments.
+ *
+ * S[xy_factor] - Alias for 'I'
+ * I[xy_factor] - New XY skew factor
+ * J[xz_factor] - New XZ skew factor
+ * K[yz_factor] - New YZ skew factor
+ */
+void GcodeSuite::M852() {
+ uint8_t ijk = 0, badval = 0, setval = 0;
+
+ if (parser.seen('I') || parser.seen('S')) {
+ ++ijk;
+ const float value = parser.value_linear_units();
+ if (WITHIN(value, SKEW_FACTOR_MIN, SKEW_FACTOR_MAX)) {
+ if (planner.skew_factor.xy != value) {
+ planner.skew_factor.xy = value;
+ ++setval;
+ }
+ }
+ else
+ ++badval;
+ }
+
+ #if ENABLED(SKEW_CORRECTION_FOR_Z)
+
+ if (parser.seen('J')) {
+ ++ijk;
+ const float value = parser.value_linear_units();
+ if (WITHIN(value, SKEW_FACTOR_MIN, SKEW_FACTOR_MAX)) {
+ if (planner.skew_factor.xz != value) {
+ planner.skew_factor.xz = value;
+ ++setval;
+ }
+ }
+ else
+ ++badval;
+ }
+
+ if (parser.seen('K')) {
+ ++ijk;
+ const float value = parser.value_linear_units();
+ if (WITHIN(value, SKEW_FACTOR_MIN, SKEW_FACTOR_MAX)) {
+ if (planner.skew_factor.yz != value) {
+ planner.skew_factor.yz = value;
+ ++setval;
+ }
+ }
+ else
+ ++badval;
+ }
+
+ #endif
+
+ if (badval)
+ SERIAL_ECHOLNPGM(STR_SKEW_MIN " " STRINGIFY(SKEW_FACTOR_MIN) " " STR_SKEW_MAX " " STRINGIFY(SKEW_FACTOR_MAX));
+
+ // When skew is changed the current position changes
+ if (setval) {
+ set_current_from_steppers_for_axis(ALL_AXES);
+ sync_plan_position();
+ report_current_position();
+ }
+
+ if (!ijk) {
+ SERIAL_ECHO_START();
+ serialprintPGM(GET_TEXT(MSG_SKEW_FACTOR));
+ SERIAL_ECHOPAIR_F(" XY: ", planner.skew_factor.xy, 6);
+ #if ENABLED(SKEW_CORRECTION_FOR_Z)
+ SERIAL_ECHOPAIR_F(" XZ: ", planner.skew_factor.xz, 6);
+ SERIAL_ECHOPAIR_F(" YZ: ", planner.skew_factor.yz, 6);
+ #endif
+ SERIAL_EOL();
+ }
+}
+
+#endif // SKEW_CORRECTION_GCODE