[Keyboard] Add Tau4 keyboard (#11361)

with default and i2cscanner keymaps

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

8 files changed, 421 insertions, 0 deletions

diff --git a/keyboards/tau4/common/glcdfont.c b/keyboards/tau4/common/glcdfont.c
new file mode 100755
index 0000000000..05577612a1
--- /dev/null
+++ b/keyboards/tau4/common/glcdfont.c
@@ -0,0 +1,105 @@
+/*
+Copyright 2020 Oliver Gaskell <me@gaskell.tech>
+
+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/>.
+*/
+
+#include "progmem.h"
+
+static const unsigned char PROGMEM font[] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3e, 0x5b, 0x4f, 0x5b, 0x3e, 0x00, 0x3e, 0x6b, 0x4f, 0x6b,
+    0x3e, 0x00, 0x1c, 0x3e, 0x7c, 0x3e, 0x1c, 0x00, 0x18, 0x3c, 0x7e, 0x3c, 0x18, 0x00, 0x1c, 0x57,
+    0x7d, 0x57, 0x1c, 0x00, 0x1c, 0x5e, 0x7f, 0x5e, 0x1c, 0x00, 0x00, 0x18, 0x3c, 0x18, 0x00, 0x00,
+    0xff, 0xe7, 0xc3, 0xe7, 0xff, 0x00, 0x00, 0x18, 0x24, 0x18, 0x00, 0x00, 0xff, 0xe7, 0xdb, 0xe7,
+    0xff, 0x00, 0x30, 0x48, 0x3a, 0x06, 0x0e, 0x00, 0x26, 0x29, 0x79, 0x29, 0x26, 0x00, 0x40, 0x7f,
+    0x05, 0x05, 0x07, 0x00, 0x40, 0x7f, 0x05, 0x25, 0x3f, 0x00, 0x5a, 0x3c, 0xe7, 0x3c, 0x5a, 0x00,
+    0x7f, 0x3e, 0x1c, 0x1c, 0x08, 0x00, 0x08, 0x1c, 0x1c, 0x3e, 0x7f, 0x00, 0x14, 0x22, 0x7f, 0x22,
+    0x14, 0x00, 0x5f, 0x5f, 0x00, 0x5f, 0x5f, 0x00, 0x06, 0x09, 0x7f, 0x01, 0x7f, 0x00, 0x00, 0x66,
+    0x89, 0x95, 0x6a, 0x00, 0x60, 0x60, 0x60, 0x60, 0x60, 0x00, 0x94, 0xa2, 0xff, 0xa2, 0x94, 0x00,
+    0x08, 0x04, 0x7e, 0x04, 0x08, 0x00, 0x10, 0x20, 0x7e, 0x20, 0x10, 0x00, 0x08, 0x08, 0x2a, 0x1c,
+    0x08, 0x00, 0x08, 0x1c, 0x2a, 0x08, 0x08, 0x00, 0x1e, 0x10, 0x10, 0x10, 0x10, 0x00, 0x0c, 0x1e,
+    0x0c, 0x1e, 0x0c, 0x00, 0x30, 0x38, 0x3e, 0x38, 0x30, 0x00, 0x06, 0x0e, 0x3e, 0x0e, 0x06, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5f, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x07,
+    0x00, 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14, 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12, 0x00, 0x23, 0x13,
+    0x08, 0x64, 0x62, 0x00, 0x36, 0x49, 0x56, 0x20, 0x50, 0x00, 0x00, 0x08, 0x07, 0x03, 0x00, 0x00,
+    0x00, 0x1c, 0x22, 0x41, 0x00, 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00, 0x00, 0x2a, 0x1c, 0x7f, 0x1c,
+    0x2a, 0x00, 0x08, 0x08, 0x3e, 0x08, 0x08, 0x00, 0x00, 0x80, 0x70, 0x30, 0x00, 0x00, 0x08, 0x08,
+    0x08, 0x08, 0x08, 0x00, 0x00, 0x00, 0x60, 0x60, 0x00, 0x00, 0x20, 0x10, 0x08, 0x04, 0x02, 0x00,
+    0x3e, 0x51, 0x49, 0x45, 0x3e, 0x00, 0x00, 0x42, 0x7f, 0x40, 0x00, 0x00, 0x72, 0x49, 0x49, 0x49,
+    0x46, 0x00, 0x21, 0x41, 0x49, 0x4d, 0x33, 0x00, 0x18, 0x14, 0x12, 0x7f, 0x10, 0x00, 0x27, 0x45,
+    0x45, 0x45, 0x39, 0x00, 0x3c, 0x4a, 0x49, 0x49, 0x31, 0x00, 0x41, 0x21, 0x11, 0x09, 0x07, 0x00,
+    0x36, 0x49, 0x49, 0x49, 0x36, 0x00, 0x46, 0x49, 0x49, 0x29, 0x1e, 0x00, 0x00, 0x00, 0x14, 0x00,
+    0x00, 0x00, 0x00, 0x40, 0x34, 0x00, 0x00, 0x00, 0x00, 0x08, 0x14, 0x22, 0x41, 0x00, 0x14, 0x14,
+    0x14, 0x14, 0x14, 0x00, 0x00, 0x41, 0x22, 0x14, 0x08, 0x00, 0x02, 0x01, 0x59, 0x09, 0x06, 0x00,
+    0x3e, 0x41, 0x5d, 0x59, 0x4e, 0x00, 0x7c, 0x12, 0x11, 0x12, 0x7c, 0x00, 0x7f, 0x49, 0x49, 0x49,
+    0x36, 0x00, 0x3e, 0x41, 0x41, 0x41, 0x22, 0x00, 0x7f, 0x41, 0x41, 0x41, 0x3e, 0x00, 0x7f, 0x49,
+    0x49, 0x49, 0x41, 0x00, 0x7f, 0x09, 0x09, 0x09, 0x01, 0x00, 0x3e, 0x41, 0x41, 0x51, 0x73, 0x00,
+    0x7f, 0x08, 0x08, 0x08, 0x7f, 0x00, 0x00, 0x41, 0x7f, 0x41, 0x00, 0x00, 0x20, 0x40, 0x41, 0x3f,
+    0x01, 0x00, 0x7f, 0x08, 0x14, 0x22, 0x41, 0x00, 0x7f, 0x40, 0x40, 0x40, 0x40, 0x00, 0x7f, 0x02,
+    0x1c, 0x02, 0x7f, 0x00, 0x7f, 0x04, 0x08, 0x10, 0x7f, 0x00, 0x3e, 0x41, 0x41, 0x41, 0x3e, 0x00,
+    0x7f, 0x09, 0x09, 0x09, 0x06, 0x00, 0x3e, 0x41, 0x51, 0x21, 0x5e, 0x00, 0x7f, 0x09, 0x19, 0x29,
+    0x46, 0x00, 0x26, 0x49, 0x49, 0x49, 0x32, 0x00, 0x03, 0x01, 0x7f, 0x01, 0x03, 0x00, 0x3f, 0x40,
+    0x40, 0x40, 0x3f, 0x00, 0x1f, 0x20, 0x40, 0x20, 0x1f, 0x00, 0x3f, 0x40, 0x38, 0x40, 0x3f, 0x00,
+    0x63, 0x14, 0x08, 0x14, 0x63, 0x00, 0x03, 0x04, 0x78, 0x04, 0x03, 0x00, 0x61, 0x59, 0x49, 0x4d,
+    0x43, 0x00, 0x00, 0x7f, 0x41, 0x41, 0x41, 0x00, 0x02, 0x04, 0x08, 0x10, 0x20, 0x00, 0x00, 0x41,
+    0x41, 0x41, 0x7f, 0x00, 0x04, 0x02, 0x01, 0x02, 0x04, 0x00, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00,
+    0x00, 0x03, 0x07, 0x08, 0x00, 0x00, 0x20, 0x54, 0x54, 0x78, 0x40, 0x00, 0x7f, 0x28, 0x44, 0x44,
+    0x38, 0x00, 0x38, 0x44, 0x44, 0x44, 0x28, 0x00, 0x38, 0x44, 0x44, 0x28, 0x7f, 0x00, 0x38, 0x54,
+    0x54, 0x54, 0x18, 0x00, 0x00, 0x08, 0x7e, 0x09, 0x02, 0x00, 0x18, 0xa4, 0xa4, 0x9c, 0x78, 0x00,
+    0x7f, 0x08, 0x04, 0x04, 0x78, 0x00, 0x00, 0x44, 0x7d, 0x40, 0x00, 0x00, 0x20, 0x40, 0x40, 0x3d,
+    0x00, 0x00, 0x7f, 0x10, 0x28, 0x44, 0x00, 0x00, 0x00, 0x41, 0x7f, 0x40, 0x00, 0x00, 0x7c, 0x04,
+    0x78, 0x04, 0x78, 0x00, 0x7c, 0x08, 0x04, 0x04, 0x78, 0x00, 0x38, 0x44, 0x44, 0x44, 0x38, 0x00,
+    0xfc, 0x18, 0x24, 0x24, 0x18, 0x00, 0x18, 0x24, 0x24, 0x18, 0xfc, 0x00, 0x7c, 0x08, 0x04, 0x04,
+    0x08, 0x00, 0x48, 0x54, 0x54, 0x54, 0x24, 0x00, 0x04, 0x04, 0x3f, 0x44, 0x24, 0x00, 0x3c, 0x40,
+    0x40, 0x20, 0x7c, 0x00, 0x1c, 0x20, 0x40, 0x20, 0x1c, 0x00, 0x3c, 0x40, 0x30, 0x40, 0x3c, 0x00,
+    0x44, 0x28, 0x10, 0x28, 0x44, 0x00, 0x4c, 0x90, 0x90, 0x90, 0x7c, 0x00, 0x44, 0x64, 0x54, 0x4c,
+    0x44, 0x00, 0x00, 0x08, 0x36, 0x41, 0x00, 0x00, 0x00, 0x00, 0x77, 0x00, 0x00, 0x00, 0x00, 0x41,
+    0x36, 0x08, 0x00, 0x00, 0x02, 0x01, 0x02, 0x04, 0x02, 0x00, 0x3c, 0x26, 0x23, 0x26, 0x3c, 0x00,
+    0x00, 0x06, 0x0e, 0x0e, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0xff, 0xff, 0xff, 0xff, 0x0f, 0x0f, 0x0f,
+    0x0f, 0x0f, 0x0f, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0,
+    0xf0, 0xf8, 0xfc, 0x3e, 0x1e, 0x06, 0x01, 0x00, 0x00, 0x00, 0x7f, 0x41, 0x41, 0x41, 0x7f, 0x00,
+    0x7f, 0x41, 0x41, 0x41, 0x7f, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0x7e, 0x5b, 0x4f, 0x5b, 0xfe, 0xc0,
+    0x00, 0x00, 0xc0, 0x00, 0xdc, 0xd7, 0xde, 0xde, 0xde, 0xd7, 0xdc, 0x00, 0xc0, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xe0, 0x30, 0x1c, 0x0e, 0xfe, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
+    0x0f, 0x1f, 0x3f, 0x3c, 0x78, 0x70, 0x60, 0x00, 0x00, 0x00, 0x7f, 0x41, 0x41, 0x41, 0x7f, 0x00,
+    0x7f, 0x41, 0x41, 0x41, 0x7f, 0x00, 0x30, 0x7b, 0x7f, 0x78, 0x30, 0x20, 0x20, 0x30, 0x78, 0x7f,
+    0x3b, 0x00, 0x03, 0x00, 0x0f, 0x7f, 0x0f, 0x0f, 0x0f, 0x7f, 0x0f, 0x00, 0x03, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x7f, 0x7f, 0xff, 0xf0, 0xf0, 0x70,
+    0x00, 0x00, 0xe0, 0xe0, 0x00, 0x04, 0x0f, 0x0f, 0x0c, 0x0c, 0x0c, 0x0c, 0xff, 0x0e, 0x0c, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
diff --git a/keyboards/tau4/config.h b/keyboards/tau4/config.h
new file mode 100755
index 0000000000..d7e6ffe1bb
--- /dev/null
+++ b/keyboards/tau4/config.h
@@ -0,0 +1,72 @@
+/*
+Copyright 2020 Oliver Gaskell <me@gaskell.tech>
+
+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      0x6060
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    taukeyboards
+#define PRODUCT         tau4
+
+/* key matrix size */
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 12
+
+/* key matrix pins */
+#define MATRIX_ROW_PINS { F4, F5, F6, F7 }
+#define MATRIX_COL_PINS { D4, D6, D7, B4, B5, B6, C6, C7, F1, F0, B0, B1 }
+#define UNUSED_PINS
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCE 5
+
+#define RGB_DI_PIN B2
+#ifdef RGB_DI_PIN
+#define RGBLIGHT_ANIMATIONS
+#define RGBLIGHT_LAYERS
+#define RGBLED_NUM 10
+#define RGBLIGHT_HUE_STEP 8
+#define RGBLIGHT_SAT_STEP 16
+#define RGBLIGHT_VAL_STEP 8
+#define RGBLIGHT_LIMIT_VAL 128
+#endif
+
+#define ENCODERS_PAD_A { B3 }
+#define ENCODERS_PAD_B { B7 }
+#define ENCODER_RESOLUTION 1
+
+// Buggy, currently disabled
+/* #define EXTERNAL_EEPROM_I2C_BASE_ADDRESS 0b10100000
+#define EXTERNAL_EEPROM_I2C_ADDRESS(loc) (EXTERNAL_EEPROM_I2C_BASE_ADDRESS | ((((loc) >> 8) & 0x07) << 1))
+#define EXTERNAL_EEPROM_BYTE_COUNT 2048
+#define EXTERNAL_EEPROM_PAGE_SIZE 16
+#define EXTERNAL_EEPROM_ADDRESS_SIZE 1
+#define EXTERNAL_EEPROM_WRITE_TIME 5 */
+
+#define OLED_DISPLAY_ADDRESS 0x3C
+#define OLED_BRIGHTNESS 255
+#define OLED_IC OLED_IC_SSD1306
+#define OLED_DISPLAY_WIDTH 128
+#define OLED_DISPLAY_HEIGHT 32
+#define OLED_FONT_H "keyboards/tau4/common/glcdfont.c"
diff --git a/keyboards/tau4/keymaps/default/keymap.c b/keyboards/tau4/keymaps/default/keymap.c
new file mode 100755
index 0000000000..aff188e4c6
--- /dev/null
+++ b/keyboards/tau4/keymaps/default/keymap.c
@@ -0,0 +1,145 @@
+/*
+Copyright 2020 Oliver Gaskell <me@gaskell.tech>
+
+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/>.
+*/
+
+#include QMK_KEYBOARD_H
+
+enum layers {
+    _QWERTY = 0,
+    _NUMPAD,
+    _LOWER,
+    _RAISE,
+    _ADJUST
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [_QWERTY] = LAYOUT_ortho_4x12(
+        KC_MUTE, KC_Q,    KC_W,    KC_E,    KC_R,       KC_T,   KC_Y,   KC_U,       KC_I,    KC_O,    KC_P,    KC_BSPC,
+        KC_ESC,  KC_A,    KC_S,    KC_D,    KC_F,       KC_G,   KC_H,   KC_J,       KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+        KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,       KC_B,   KC_N,   KC_M,       KC_COMM, KC_DOT,  KC_SLSH, KC_ENT,
+        KC_BSPC, KC_LCTL, KC_LGUI, KC_LALT, MO(_LOWER), KC_SPC, KC_SPC, MO(_RAISE), KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT),
+
+    [_NUMPAD] = LAYOUT_ortho_4x12(
+        KC_TRNS, KC_TRNS,     KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_P7, KC_P8,   KC_P9,   KC_PSLS,
+        KC_TRNS, KC_TRNS,     KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_P4, KC_P5,   KC_P6,   KC_PAST,
+        KC_TRNS, TG(_NUMPAD), KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_P1, KC_P2,   KC_P3,   KC_PENT,
+        KC_TRNS, KC_TRNS,     KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_P0, KC_PDOT, KC_PMNS, KC_PPLS),
+
+    [_LOWER] = LAYOUT_ortho_4x12(
+        KC_VOLD, KC_EXLM,       KC_AT,    KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN,      KC_RPRN,       KC_INS,
+        KC_NLCK, KC_F7,         KC_F8,    KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_LCBR, KC_RCBR, KC_UNDS,      KC_PLUS,       LSFT(KC_NUHS),
+        KC_TRNS, LSFT(KC_NUBS), KC_GRAVE, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, LSFT(KC_GRV), LSFT(KC_NUBS), KC_TRNS,
+        KC_TRNS, KC_TRNS,       KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_HOME, KC_PGDN,      KC_PGUP,       KC_END),
+
+    [_RAISE] = LAYOUT_ortho_4x12(
+        KC_VOLU, KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_DEL,
+        KC_CAPS, KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_LBRC, KC_RBRC, KC_MINS, KC_EQL,  KC_NUHS,
+        KC_TRNS, KC_PSCR, KC_SLCK, KC_PAUS, KC_APP,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_GRV,  KC_NUBS, KC_TRNS,
+        KC_TAB,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_MSTP, KC_MPRV, KC_MPLY, KC_MNXT),
+
+    [_ADJUST] = LAYOUT_ortho_4x12(
+        KC_TRNS, RGB_TOG,     RGB_MOD, RGB_HUD, RGB_HUI,  RGB_SAD,  RGB_SAI, RGB_VAD, RGB_VAI, KC_TRNS, KC_TRNS, RESET,
+        KC_TRNS, RGB_M_P,     RGB_M_B, RGB_M_R, RGB_M_SW, RGB_M_SN, RGB_M_K, RGB_M_X, RGB_M_G, RGB_M_T, KC_TRNS, KC_TRNS,
+        KC_TRNS, TG(_NUMPAD), KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+        KC_TRNS, KC_TRNS,     KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
+
+const rgblight_segment_t PROGMEM _RAISE_lighting[] = RGBLIGHT_LAYER_SEGMENTS(
+    {7, 1, 1, 202, 110}
+);
+const rgblight_segment_t PROGMEM _LOWER_lighting[] = RGBLIGHT_LAYER_SEGMENTS(
+    {7, 1, 125, 188, 80}
+);
+const rgblight_segment_t PROGMEM _ADJUST_lighting[] = RGBLIGHT_LAYER_SEGMENTS(
+    {7, 1, 32, 25, 127}
+);
+const rgblight_segment_t PROGMEM _NUMPAD_lighting[] = RGBLIGHT_LAYER_SEGMENTS(
+    {7, 1, HSV_BLUE}
+);
+const rgblight_segment_t PROGMEM _DEFAULT_lighting[] = RGBLIGHT_LAYER_SEGMENTS(
+    {7, 1, HSV_OFF}
+);
+const rgblight_segment_t* const PROGMEM my_rgb_layers[] = RGBLIGHT_LAYERS_LIST(
+    _DEFAULT_lighting,
+    _NUMPAD_lighting,
+    _LOWER_lighting,
+    _RAISE_lighting,
+    _ADJUST_lighting
+);
+
+void keyboard_post_init_user(void) {
+    rgblight_layers = my_rgb_layers;
+
+    // Uncomment for debug mode
+    /* debug_enable=true;
+    debug_matrix=true; */
+}
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+    state = update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+
+    rgblight_set_layer_state(_QWERTY, layer_state_cmp(state, _QWERTY));
+    rgblight_set_layer_state(_NUMPAD, layer_state_cmp(state, _NUMPAD));
+    rgblight_set_layer_state(_LOWER, layer_state_cmp(state, _LOWER));
+    rgblight_set_layer_state(_RAISE, layer_state_cmp(state, _RAISE));
+    rgblight_set_layer_state(_ADJUST, layer_state_cmp(state, _ADJUST));
+
+    return state;
+}
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+    if (index == 0) { /* First encoder */
+        if (clockwise) {
+            tap_code(KC_VOLU);
+        } else {
+            tap_code(KC_VOLD);
+        }
+    }
+}
+
+
+#ifdef OLED_DRIVER_ENABLE
+
+static void render_status(void) {
+    oled_write_P(PSTR("Tau.4 v1.0\n\n"), false);
+    oled_write_P(PSTR("Layer:\n"), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case _QWERTY:
+            oled_write_P(PSTR("Default  "), false);
+            break;
+        case _NUMPAD:
+            oled_write_P(PSTR("Numpad   "), false);
+            break;
+        case _LOWER:
+            oled_write_P(PSTR("Lower    "), false);
+            break;
+        case _RAISE:
+            oled_write_P(PSTR("Raise    "), false);
+            break;
+        case _ADJUST:
+            oled_write_P(PSTR("Adjust   "), false);
+            break;
+        default:
+            oled_write_P(PSTR("Undefined"), false);
+    }
+}
+
+void oled_task_user(void) {
+    render_status();
+}
+#endif
diff --git a/keyboards/tau4/keymaps/default/readme.md b/keyboards/tau4/keymaps/default/readme.md
new file mode 100644
index 0000000000..ee5d1b8398
--- /dev/null
+++ b/keyboards/tau4/keymaps/default/readme.md
@@ -0,0 +1,5 @@
+Default keymap:
+
+![Keymap](http://gaskell.tech/tau/images/tau4keymap.png)
+
+This layout supports 2x1u spacebar and 1x2u, and an encoder in the topmost position.
diff --git a/keyboards/tau4/readme.md b/keyboards/tau4/readme.md
new file mode 100644
index 0000000000..beea3f07a9
--- /dev/null
+++ b/keyboards/tau4/readme.md
@@ -0,0 +1,16 @@
+# τ.4
+
+![Tau.4](http://gaskell.tech/tau/images/tau4.jpg)
+
+A 40% ortholinear keyboard, developed by Oliver Gaskell. More info on [gaskell.tech](https://gaskell.tech/tau/four.html)
+
+* Keyboard Maintainer: [Oliver Gaskell](https://github.com/ogaskell)
+* Hardware Supported: Tau4 PCB rev1.0, Tau4 PCB rev1.1
+* Hardware Availability: Group Buy - Opens 05 Feb 2021 [More Details](https://gaskell.tech/tau/four.html)
+
+
+Make example for this keyboard (after setting up your build environment):
+
+    make tau4:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/tau4/rules.mk b/keyboards/tau4/rules.mk
new file mode 100755
index 0000000000..712646abc5
--- /dev/null
+++ b/keyboards/tau4/rules.mk
@@ -0,0 +1,28 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+ENCODER_ENABLE = yes        # Rotary Encoder support
+OLED_DRIVER_ENABLE = yes    # OLED display support
+# EEPROM_DRIVER ?= i2c        # Driver for external EEPROM chip
+# This is currently not working due to QMK not officially supporting the chip used on the Tau4, I am working on a fix.
+
+LAYOUTS = ortho_4x12
diff --git a/keyboards/tau4/tau4.c b/keyboards/tau4/tau4.c
new file mode 100755
index 0000000000..3002566cea
--- /dev/null
+++ b/keyboards/tau4/tau4.c
@@ -0,0 +1,18 @@
+/*
+Copyright 2020 Oliver Gaskell <me@gaskell.tech>
+
+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/>.
+*/
+
+#include "tau4.h"
diff --git a/keyboards/tau4/tau4.h b/keyboards/tau4/tau4.h
new file mode 100755
index 0000000000..d9ff502116
--- /dev/null
+++ b/keyboards/tau4/tau4.h
@@ -0,0 +1,32 @@
+/*
+Copyright 2020 Oliver Gaskell <me@gaskell.tech>
+
+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 "quantum.h"
+
+#define LAYOUT_ortho_4x12( \
+	K000, K001, K002, K003, K004, K005, K006, K007, K008, K009, K010, K011, \
+	K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, \
+	K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, \
+	K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311  \
+) { \
+	{ K000,  K001,  K002,  K003,  K004,  K005,  K006,  K007,  K008,  K009,  K010,  K011 }, \
+	{ K100,  K101,  K102,  K103,  K104,  K105,  K106,  K107,  K108,  K109,  K110,  K111 }, \
+	{ K200,  K201,  K202,  K203,  K204,  K205,  K206,  K207,  K208,  K209,  K210,  K211 }, \
+	{ K300,  K301,  K302,  K303,  K304,  K305,  K306,  K307,  K308,  K309,  K310,  K311 }  \
+}