✨ M256 LCD brightness (#22478)

Marlin/src/gcode/lcd/M256.cpp

@@ -0,0 +1,37 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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 HAS_LCD_BRIGHTNESS
+
+#include "../gcode.h"
+#include "../../lcd/marlinui.h"
+
+/**
+ * M256: Set the LCD brightness
+ */
+void GcodeSuite::M256() {
+  if (parser.seenval('B')) ui.set_brightness(parser.value_int());
+  SERIAL_ECHOLNPAIR("LCD Brightness: ", ui.brightness);
+}
+
+#endif // HAS_LCD_BRIGHTNESS

Marlin/src/gcode/lcd/M73.cpp

@@ -35,13 +35,13 @@
  *   M73 P25 ; Set progress to 25%
  */
 void GcodeSuite::M73() {
-  if (parser.seen('P'))
+  if (parser.seenval('P'))
     ui.set_progress((PROGRESS_SCALE) > 1
       ? parser.value_float() * (PROGRESS_SCALE)
       : parser.value_byte()
     );
   #if BOTH(LCD_SET_PROGRESS_MANUALLY, USE_M73_REMAINING_TIME)
-    if (parser.seen('R')) ui.set_remaining_time(60 * parser.value_ulong());
+    if (parser.seenval('R')) ui.set_remaining_time(60 * parser.value_ulong());
   #endif
 }