[Keyboard] Add Spider Island split 78 key ps2avrGB based keyboard (#9900)

keyboards/spiderisland/split78/config.h

@@ -0,0 +1,35 @@
+/*
+Copyright 2020 unrelenting.technology
+
+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/>.
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID    0xFEED
+#define PRODUCT_ID   0xF4E4
+#define DEVICE_VER   0x0001
+#define MANUFACTURER SpiderIsland
+#define PRODUCT      Split 78-key
+
+/* key matrix size */
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 14
+
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+#define BACKLIGHT_BREATHING