Add MxSS keyboard (#3335)

* Added basic MxSS support

* Fixed split RSHFT for ISO layouts

* Updated readme.md for MxSS

* Added initial support for individual control of front RGB LEDs

* Changed RGBLED color selection to work using hue and saturation rather than RGB
Added code for LED state change on layer change

* Avoid needing an entire 8 bits to store the brightness value

* Added custom keycodes, along with their handlers

* Added EEPROM storage for front LED config

* Fixed up ability to use QMK Configurator and updated readme.md

* Applied suggested changes from pull request: https://github.com/standard/standard/issues/452

Updated name in license descriptions
Updated layouts to snake case
Corrected mistakes in info.json
Updated layer_colors to a weak attributed array in mxss.c

* Defined a new safe range for custom keycodes in keymap.c

1 files changed, 81 insertions, 0 deletions

diff --git a/keyboards/mxss/mxss_frontled.h b/keyboards/mxss/mxss_frontled.h
new file mode 100644
index 0000000000..1350266ba9
--- /dev/null
+++ b/keyboards/mxss/mxss_frontled.h
@@ -0,0 +1,81 @@
+/* Copyright 2018 Jumail Mundekkat / MxBlue
+ *
+ * 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 2 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 <http://www.gnu.org/licenses/>.
+ */
+
+// EEPROM management code taken from Wilba6582
+// https://github.com/Wilba6582/qmk_firmware/blob/zeal60/keyboards/zeal60/zeal_eeprom.h
+ 
+#ifndef MXSS_FRONTLED_H
+#define MXSS_FRONTLED_H
+
+#include "quantum_keycodes.h"
+
+// RGBLED index for front LEDs
+#define RGBLIGHT_FLED1 14
+#define RGBLIGHT_FLED2 15
+
+// Brightness increase step for front LEDs
+#define FLED_VAL_STEP 8
+
+// QMK never uses more then 32bytes of EEPROM, so our region starts there
+// Magic value to verify the state of the EEPROM
+#define EEPROM_MAGIC 0xC3E7
+#define EEPROM_MAGIC_ADDR ((void*)32)
+
+// Front LED settings
+#define EEPROM_FRONTLED_ADDR ((void*)34)
+
+// Modes for front LEDs
+#define FLED_OFF    0b00
+#define FLED_INDI   0b01
+#define FLED_RGB    0b10
+#define FLED_UNDEF  0b11
+
+// Hard-coded color for capslock indicator in FLED_INDI mode, H:0% S:100% = Red
+#define FLED_CAPS_H 0
+#define FLED_CAPS_S 255
+
+// Config storage format for EEPROM
+typedef union {
+  uint8_t raw;
+  struct {
+    uint8_t  mode    :2;
+    uint8_t  val     :6;
+  };
+} fled_config;
+
+// Structure to store hue and saturation values
+typedef struct _hs_set {
+    uint16_t hue; 
+    uint8_t sat;
+} hs_set;
+
+// Custom keycodes for front LED control
+enum fled_keycodes {
+  FLED_MOD = SAFE_RANGE,
+  FLED_VAI,
+  FLED_VAD,
+  NEW_SAFE_RANGE // define a new safe range
+};
+
+bool eeprom_is_valid(void);         // Check if EEPROM has been set up
+void eeprom_set_valid(bool valid);  // Change validity state of EEPROM
+void eeprom_update_conf(void);      // Store current front LED config to EEPROM
+
+void fled_mode_cycle(void);         // Cycle between the 3 modes for the front LEDs
+void fled_val_increase(void);       // Increase the brightness of the front LEDs
+void fled_val_decrease(void);       // Decrease the brightness of the front LEDs
+
+#endif //MXSS_FRONTLED_H
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