update code base to Marlin 2.0.9.2

Marlin/src/libs/hex_print.h

@@ -0,0 +1,41 @@
+/**
+ * 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/>.
+ *
+ */
+#pragma once
+
+#include <stdint.h>
+
+//
+// Utility functions to create and print hex strings as nybble, byte, and word.
+//
+
+FORCE_INLINE char hex_nybble(const uint8_t n) {
+  return (n & 0xF) + ((n & 0xF) < 10 ? '0' : 'A' - 10);
+}
+char* hex_byte(const uint8_t b);
+char* hex_word(const uint16_t w);
+char* hex_address(const void * const w);
+
+void print_hex_nybble(const uint8_t n);
+void print_hex_byte(const uint8_t b);
+void print_hex_word(const uint16_t w);
+void print_hex_address(const void * const w);
+void print_hex_long(const uint32_t w, const char delimiter);