[Keyboard] Zen keyboard update for Rev2 (#5522)

* Updated Zen keyboard for rev2 support

* Fixing r1 compile errors

* PR feedback and changes for Proton-C compile errors

37 files changed, 662 insertions, 987 deletions

diff --git a/keyboards/zen/common/glcdfont.c b/keyboards/zen/common/glcdfont.c
new file mode 100644
index 0000000000..3b4ccfa95c
--- /dev/null
+++ b/keyboards/zen/common/glcdfont.c
@@ -0,0 +1,239 @@
+// This is the SOL 6x8 font
+
+#pragma once
+
+#ifdef __AVR__
+ #include <avr/io.h>
+ #include <avr/pgmspace.h>
+#elif defined(ESP8266)
+ #include <pgmspace.h>
+#else
+ #define PROGMEM
+#endif
+
+static const unsigned char font[] PROGMEM = {
+  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, 0x00, 0x00, 0x00, 0x80, 0x00,
+  0x00, 0x00, 0x00, 0x80, 0x80, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x80, 0x80,
+  0x80, 0x80, 0x80, 0x80, 0x80, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x80, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x80, 0x00, 0x00, 0x0C, 0x90,
+  0xB0, 0xE0, 0x72, 0x31, 0x9B, 0xDE,
+  0xCE, 0xEC, 0xEE, 0xE9, 0xE9, 0xEC,
+  0xCF, 0xDA, 0x99, 0x3E, 0x62, 0xE4,
+  0xC4, 0x70, 0x10, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x60,
+  0xC0, 0xC0, 0x80, 0x80, 0x02, 0x85,
+  0x85, 0x87, 0x85, 0x89, 0x89, 0x92,
+  0xEA, 0xC6, 0xC4, 0x48, 0x50, 0x60,
+  0x40, 0x40, 0x40, 0x40, 0xC0, 0xE0,
+  0x50, 0x28, 0x10, 0x10, 0x60, 0xC0,
+  0x40, 0x40, 0x40, 0x40, 0x80, 0x80,
+  0x80, 0x80, 0x80, 0xE0, 0xF8, 0xFC,
+  0xF8, 0xF0, 0x00, 0x00, 0x00, 0x00,
+  0xE0, 0xF0, 0xF0, 0xF0, 0xE0, 0xEC,
+  0xEE, 0xF7, 0xF3, 0x70, 0x20, 0x00,
+  0x7C, 0x7C, 0x7C, 0x7E, 0x00, 0x7E,
+  0x7E, 0x7E, 0x7F, 0x7F, 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, 0xE0, 0xEC, 0xDF,
+  0xFC, 0xE0, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x7F, 0x80, 0x80,
+  0x80, 0x70, 0x0F, 0x00, 0x00, 0x80,
+  0x7F, 0x00, 0x00, 0x7F, 0x80, 0x80,
+  0x80, 0x80, 0x80, 0x80, 0x80, 0x7F,
+  0x00, 0x00, 0x80, 0x80, 0x80, 0x80,
+  0x80, 0x80, 0x80, 0xFF, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x40, 0x21, 0x33, 0x3B, 0x7B,
+  0xFF, 0x00, 0x7C, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0x7C, 0x01,
+  0xFF, 0xDE, 0x8C, 0x04, 0x0C, 0x08,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x01, 0x01, 0x7F, 0x80,
+  0x80, 0xBE, 0xBE, 0x80, 0x80, 0x80,
+  0xC1, 0xFF, 0x80, 0x04, 0x32, 0x5E,
+  0x1C, 0x3D, 0x26, 0x10, 0xC1, 0xFF,
+  0x3E, 0x00, 0x00, 0x08, 0x36, 0xC1,
+  0x08, 0x08, 0x14, 0x77, 0x94, 0x94,
+  0x94, 0xF7, 0x94, 0xF7, 0x9C, 0x9C,
+  0xFF, 0xFF, 0x1E, 0x00, 0x00, 0x00,
+  0x0F, 0x1F, 0x3F, 0x7F, 0x7F, 0x7F,
+  0x7F, 0x7F, 0x3F, 0x1E, 0x0C, 0x00,
+  0x1F, 0x1F, 0x1F, 0x3F, 0x00, 0x3F,
+  0x3F, 0x3F, 0x7F, 0x7F, 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,
+  0x40, 0x7C, 0x3F, 0x3F, 0x23, 0x01,
+  0x23, 0x3F, 0x37, 0x6C, 0x40, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x06, 0x02, 0x06,
+  0x4D, 0x4F, 0x8C, 0xF9, 0x73, 0x37,
+  0x27, 0x2F, 0x2F, 0xAF, 0xEF, 0x6F,
+  0x77, 0x17, 0x33, 0x79, 0xCC, 0x1F,
+  0x31, 0x20, 0x21, 0x02, 0x02, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x40, 0xE0,
+  0xA0, 0xA0, 0xD0, 0x90, 0x48, 0x48,
+  0x25, 0x2B, 0x11, 0x09, 0x05, 0x03,
+  0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+  0x01, 0x03, 0x02, 0x04, 0x03, 0x01,
+  0x01, 0x01, 0x01, 0x01, 0x01, 0x00,
+  0x00, 0x00, 0x00, 0x03, 0x0F, 0x1F,
+  0x0F, 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,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  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/zen/config.h b/keyboards/zen/config.h
index 4478062eb0..6868dc1354 100644
--- a/keyboards/zen/config.h
+++ b/keyboards/zen/config.h
@@ -15,17 +15,6 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 #include "config_common.h"
-
-#endif  // CONFIG_H
-
-#undef  RGBLED_NUM
-#define RGBLIGHT_ANIMATIONS
-#define RGBLED_NUM 16
-
-#ifndef TAPPING_TERM
-#define TAPPING_TERM 100
-#endif
diff --git a/keyboards/zen/keymaps/default/rules.mk b/keyboards/zen/keymaps/default/rules.mk
deleted file mode 100644
index 73142a1680..0000000000
--- a/keyboards/zen/keymaps/default/rules.mk
+++ /dev/null
@@ -1,3 +0,0 @@
-RGBLIGHT_ENABLE = yes
-BACKLIGHT_ENABLE = yes
-
diff --git a/keyboards/zen/keymaps/jwlawrence/rules.mk b/keyboards/zen/keymaps/jwlawrence/rules.mk
deleted file mode 100644
index 73142a1680..0000000000
--- a/keyboards/zen/keymaps/jwlawrence/rules.mk
+++ /dev/null
@@ -1,3 +0,0 @@
-RGBLIGHT_ENABLE = yes
-BACKLIGHT_ENABLE = yes
-
diff --git a/keyboards/zen/keymaps/xyverz/rules.mk b/keyboards/zen/keymaps/xyverz/rules.mk
deleted file mode 100644
index 73142a1680..0000000000
--- a/keyboards/zen/keymaps/xyverz/rules.mk
+++ /dev/null
@@ -1,3 +0,0 @@
-RGBLIGHT_ENABLE = yes
-BACKLIGHT_ENABLE = yes
-
diff --git a/keyboards/zen/matrix.c b/keyboards/zen/matrix.c
deleted file mode 100644
index 34655237b5..0000000000
--- a/keyboards/zen/matrix.c
+++ /dev/null
@@ -1,466 +0,0 @@
-/*
-Copyright 2017 Danny Nguyen <danny@keeb.io>
-
-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/>.
-*/
-
-/*
- * scan matrix
- */
-#include <stdint.h>
-#include <stdbool.h>
-#include <avr/io.h>
-#include "wait.h"
-#include "print.h"
-#include "debug.h"
-#include "util.h"
-#include "matrix.h"
-#include "split_util.h"
-#include "pro_micro.h"
-#include "config.h"
-#include "timer.h"
-#include "backlight.h"
-
-#ifdef USE_I2C
-#  include "i2c.h"
-#else // USE_SERIAL
-#  include "serial.h"
-#endif
-
-#ifndef DEBOUNCING_DELAY
-#   define DEBOUNCING_DELAY 5
-#endif
-
-#if (DEBOUNCING_DELAY > 0)
-    static uint16_t debouncing_time;
-    static bool debouncing = false;
-#endif
-
-#if (MATRIX_COLS <= 8)
-#    define print_matrix_header()  print("\nr/c 01234567\n")
-#    define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
-#    define matrix_bitpop(i)       bitpop(matrix[i])
-#    define ROW_SHIFTER ((uint8_t)1)
-#else
-#    error "Currently only supports 8 COLS"
-#endif
-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
-#define ERROR_DISCONNECT_COUNT 5
-
-#define SERIAL_LED_ADDR 0x00
-
-#define ROWS_PER_HAND (MATRIX_ROWS/2)
-
-static uint8_t error_count = 0;
-
-static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
-static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
-
-/* matrix state(1:on, 0:off) */
-static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
-#if (DIODE_DIRECTION == COL2ROW)
-    static void init_cols(void);
-    static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
-    static void unselect_rows(void);
-    static void select_row(uint8_t row);
-    static void unselect_row(uint8_t row);
-#elif (DIODE_DIRECTION == ROW2COL)
-    static void init_rows(void);
-    static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
-    static void unselect_cols(void);
-    static void unselect_col(uint8_t col);
-    static void select_col(uint8_t col);
-#endif
-
-__attribute__ ((weak))
-void matrix_init_kb(void) {
-    matrix_init_user();
-}
-
-__attribute__ ((weak))
-void matrix_scan_kb(void) {
-    matrix_scan_user();
-}
-
-__attribute__ ((weak))
-void matrix_init_user(void) {
-}
-
-__attribute__ ((weak))
-void matrix_scan_user(void) {
-}
-
-inline
-uint8_t matrix_rows(void)
-{
-    return MATRIX_ROWS;
-}
-
-inline
-uint8_t matrix_cols(void)
-{
-    return MATRIX_COLS;
-}
-
-void matrix_init(void)
-{
-    debug_enable = true;
-    debug_matrix = true;
-    debug_mouse = true;
-    // initialize row and col
-    unselect_rows();
-    init_cols();
-
-    TX_RX_LED_INIT;
-
-    // initialize matrix state: all keys off
-    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
-        matrix[i] = 0;
-        matrix_debouncing[i] = 0;
-    }
-
-    matrix_init_quantum();
-}
-
-uint8_t _matrix_scan(void)
-{
-    int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
-#if (DIODE_DIRECTION == COL2ROW)
-    // Set row, read cols
-    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
-#       if (DEBOUNCING_DELAY > 0)
-            bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
-
-            if (matrix_changed) {
-                debouncing = true;
-                debouncing_time = timer_read();
-            }
-
-#       else
-            read_cols_on_row(matrix+offset, current_row);
-#       endif
-
-    }
-
-#elif (DIODE_DIRECTION == ROW2COL)
-    // Set col, read rows
-    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
-#       if (DEBOUNCING_DELAY > 0)
-            bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
-            if (matrix_changed) {
-                debouncing = true;
-                debouncing_time = timer_read();
-            }
-#       else
-             read_rows_on_col(matrix+offset, current_col);
-#       endif
-
-    }
-#endif
-
-#   if (DEBOUNCING_DELAY > 0)
-        if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
-            for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
-                matrix[i+offset] = matrix_debouncing[i+offset];
-            }
-            debouncing = false;
-        }
-#   endif
-
-    return 1;
-}
-
-#ifdef USE_I2C
-
-// Get rows from other half over i2c
-int i2c_transaction(void) {
-    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
-
-    int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
-    if (err) goto i2c_error;
-
-    // start of matrix stored at 0x00
-    err = i2c_master_write(0x00);
-    if (err) goto i2c_error;
-
-    // Start read
-    err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
-    if (err) goto i2c_error;
-
-    if (!err) {
-        int i;
-        for (i = 0; i < ROWS_PER_HAND-1; ++i) {
-            matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
-        }
-        matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
-        i2c_master_stop();
-    } else {
-i2c_error: // the cable is disconnceted, or something else went wrong
-        i2c_reset_state();
-        return err;
-    }
-
-    return 0;
-}
-
-#else // USE_SERIAL
-
-int serial_transaction(void) {
-    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
-
-    if (serial_update_buffers()) {
-        return 1;
-    }
-
-    for (int i = 0; i < ROWS_PER_HAND; ++i) {
-        matrix[slaveOffset+i] = serial_slave_buffer[i];
-    }
-
-#ifdef BACKLIGHT_ENABLE
-    // Write backlight level for slave to read
-    serial_master_buffer[SERIAL_LED_ADDR] = get_backlight_level();
-#endif
-    return 0;
-}
-#endif
-
-uint8_t matrix_scan(void)
-{
-    uint8_t ret = _matrix_scan();
-
-#ifdef USE_I2C
-    if( i2c_transaction() ) {
-#else // USE_SERIAL
-    if( serial_transaction() ) {
-#endif
-        // turn on the indicator led when halves are disconnected
-        TXLED1;
-
-        error_count++;
-
-        if (error_count > ERROR_DISCONNECT_COUNT) {
-            // reset other half if disconnected
-            int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
-            for (int i = 0; i < ROWS_PER_HAND; ++i) {
-                matrix[slaveOffset+i] = 0;
-            }
-        }
-    } else {
-        // turn off the indicator led on no error
-        TXLED0;
-        error_count = 0;
-    }
-    matrix_scan_quantum();
-    return ret;
-}
-
-void matrix_slave_scan(void) {
-    _matrix_scan();
-
-    int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
-
-#ifdef USE_I2C
-    for (int i = 0; i < ROWS_PER_HAND; ++i) {
-        i2c_slave_buffer[i] = matrix[offset+i];
-    }
-#else // USE_SERIAL
-    for (int i = 0; i < ROWS_PER_HAND; ++i) {
-        serial_slave_buffer[i] = matrix[offset+i];
-    }
-
-#ifdef BACKLIGHT_ENABLE
-    // Read backlight level sent from master and update level on slave
-    backlight_set(serial_master_buffer[SERIAL_LED_ADDR]);
-#endif
-#endif
-}
-
-bool matrix_is_modified(void)
-{
-    if (debouncing) return false;
-    return true;
-}
-
-inline
-bool matrix_is_on(uint8_t row, uint8_t col)
-{
-    return (matrix[row] & ((matrix_row_t)1<<col));
-}
-
-inline
-matrix_row_t matrix_get_row(uint8_t row)
-{
-    return matrix[row];
-}
-
-void matrix_print(void)
-{
-    print("\nr/c 0123456789ABCDEF\n");
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        phex(row); print(": ");
-        pbin_reverse16(matrix_get_row(row));
-        print("\n");
-    }
-}
-
-uint8_t matrix_key_count(void)
-{
-    uint8_t count = 0;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        count += bitpop16(matrix[i]);
-    }
-    return count;
-}
-
-#if (DIODE_DIRECTION == COL2ROW)
-
-static void init_cols(void)
-{
-    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
-        uint8_t pin = col_pins[x];
-        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
-        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
-    }
-}
-
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
-{
-    // Store last value of row prior to reading
-    matrix_row_t last_row_value = current_matrix[current_row];
-
-    // Clear data in matrix row
-    current_matrix[current_row] = 0;
-
-    // Select row and wait for row selecton to stabilize
-    select_row(current_row);
-    wait_us(30);
-
-    // For each col...
-    for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
-
-        // Select the col pin to read (active low)
-        uint8_t pin = col_pins[col_index];
-        uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
-
-        // Populate the matrix row with the state of the col pin
-        current_matrix[current_row] |=  pin_state ? 0 : (ROW_SHIFTER << col_index);
-    }
-
-    // Unselect row
-    unselect_row(current_row);
-
-    return (last_row_value != current_matrix[current_row]);
-}
-
-static void select_row(uint8_t row)
-{
-    uint8_t pin = row_pins[row];
-    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
-    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
-}
-
-static void unselect_row(uint8_t row)
-{
-    uint8_t pin = row_pins[row];
-    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
-    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
-}
-
-static void unselect_rows(void)
-{
-    for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
-        uint8_t pin = row_pins[x];
-        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
-        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
-    }
-}
-
-#elif (DIODE_DIRECTION == ROW2COL)
-
-static void init_rows(void)
-{
-    for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
-        uint8_t pin = row_pins[x];
-        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
-        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
-    }
-}
-
-static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
-{
-    bool matrix_changed = false;
-
-    // Select col and wait for col selecton to stabilize
-    select_col(current_col);
-    wait_us(30);
-
-    // For each row...
-    for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
-    {
-
-        // Store last value of row prior to reading
-        matrix_row_t last_row_value = current_matrix[row_index];
-
-        // Check row pin state
-        if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
-        {
-            // Pin LO, set col bit
-            current_matrix[row_index] |= (ROW_SHIFTER << current_col);
-        }
-        else
-        {
-            // Pin HI, clear col bit
-            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
-        }
-
-        // Determine if the matrix changed state
-        if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
-        {
-            matrix_changed = true;
-        }
-    }
-
-    // Unselect col
-    unselect_col(current_col);
-
-    return matrix_changed;
-}
-
-static void select_col(uint8_t col)
-{
-    uint8_t pin = col_pins[col];
-    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
-    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
-}
-
-static void unselect_col(uint8_t col)
-{
-    uint8_t pin = col_pins[col];
-    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
-    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
-}
-
-static void unselect_cols(void)
-{
-    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
-        uint8_t pin = col_pins[x];
-        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
-        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
-    }
-}
-
-#endif
diff --git a/keyboards/zen/readme.md b/keyboards/zen/readme.md
index 0fb0ffb3b6..7ca7c69fe5 100644
--- a/keyboards/zen/readme.md
+++ b/keyboards/zen/readme.md
@@ -2,19 +2,26 @@
 
 A split ergo keyboard with a few goals in mind:
 
-- Be as thin as possible. Other split KBs (Let's Split, Nyquist, Iris) are 15.2mm thick. The Zen is only 8.0mm thick.
+- Be as thin as possible. Other split KBs (Let's Split, Nyquist, Iris) are 15.2mm thick. The Zen rev2 is only 13.2mm thick *including switches and caps* when using Kailh Choc low-profile switches, and 22.1mm using standard MX switches and DSA keycaps.
 - Layout designed for gaming. 1.5u pinky keys, ortho alphas, and angled thumb keys. After trying Ortholinear, Atreus62, and Ergodox, this is the best layout for gaming and typing.
-- RGB backlighting. 16 WS2812b LEDs shine through the perimeter switches. The SK6812 variant are cheap and easy to solder.
+- Per-key RGB lighting. 34 WS2812b LEDs per side make it exceptionally bright
 - Price. Using Arduino Pro Micro, SK6812 LEDs, and PCB FR4 for the case, the cost of each half without switches or caps can be reduced to under $20 when purchased at volume.
+- Options. The Zen rev2 comes with rotary encoder support, SSD1306 OLED pinout, USB-C or TRRS interconnect, and jumpers to enable compatibility with the [QMK Proton-C](https://olkb.com/parts/qmk-proton-c) and the [Keeb.io Elite-C](https://keeb.io/products/elite-c-usb-c-pro-micro-replacement-arduino-compatible-atmega32u4)
 
-Keyboard Maintainer: [Legonut](https://github.com/Legonut)  
-Hardware Supported: Zen rev1  
+Keyboard Maintainer: [Legonut](https://github.com/Legonut)
+Hardware Supported: Zen rev1, Zen rev2
 Hardware Availability: [RGBKB.net](https://www.rgbkb.net/)
 
-A build guide and more info for this keyboard can be found here: [Zen Build Guide](https://legonut.gitbooks.io/zen-keyboard/content/).
+A build guide and more info for this keyboard can be found here: [Zen Build Guide](https://rgbkb.gitbook.io/sol-build-guide/zygomorph-build-guide/untitled).
 
 Make example for this keyboard (after setting up your build environment):
 
-    make zen/rev1:default
+    make zen/rev2:default
+
+To build for a Proton-C:
+
+    make zen/rev2:default CTPC=yes
+
+**Note:** The Proton-C does not have split keyboard, or encoder support. Also OLED driver support is untested. Will update as status changes.
 
 See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
diff --git a/keyboards/zen/rev1/config.h b/keyboards/zen/rev1/config.h
index f480cadcc5..88f39af484 100644
--- a/keyboards/zen/rev1/config.h
+++ b/keyboards/zen/rev1/config.h
@@ -15,15 +15,12 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef REV1_CONFIG_H
-#define REV1_CONFIG_H
-
-#include QMK_KEYBOARD_CONFIG_H
+#pragma once
 
 /* USB Device descriptor parameter */
-#define VENDOR_ID       0xCEEB
-#define PRODUCT_ID      0x1256
-#define DEVICE_VER      0x0200
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x3060
+#define DEVICE_VER      0x0001
 #define MANUFACTURER    Legonut
 #define PRODUCT         Project Zen
 #define DESCRIPTION     Split gaming keyboard
@@ -40,12 +37,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
+#define SOFT_SERIAL_PIN   D0
+
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
-/* number of backlight levels */
-// #define BACKLIGHT_LEVELS 3
-
 /* Set 0 if debouncing isn't needed */
 #define DEBOUNCING_DELAY 5
 
@@ -54,9 +50,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
 
-#define BACKLIGHT_PIN F4
-#define BACKLIGHT_LEVELS 5
-
 /* ws2812 RGB LED */
 #define RGB_DI_PIN D1
 
@@ -79,5 +72,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_ONESHOT
 //#define NO_ACTION_MACRO
 //#define NO_ACTION_FUNCTION
-
-#endif
diff --git a/keyboards/zen/keymaps/333fred/config.h b/keyboards/zen/rev1/keymaps/333fred/config.h
index 1634f368cc..1634f368cc 100644
--- a/keyboards/zen/keymaps/333fred/config.h
+++ b/keyboards/zen/rev1/keymaps/333fred/config.h
diff --git a/keyboards/zen/keymaps/333fred/keymap.c b/keyboards/zen/rev1/keymaps/333fred/keymap.c
index 3dd7698039..3dd7698039 100644
--- a/keyboards/zen/keymaps/333fred/keymap.c
+++ b/keyboards/zen/rev1/keymaps/333fred/keymap.c
diff --git a/keyboards/zen/keymaps/333fred/rules.mk b/keyboards/zen/rev1/keymaps/333fred/rules.mk
index 38b7155504..1359e81c09 100644
--- a/keyboards/zen/keymaps/333fred/rules.mk
+++ b/keyboards/zen/rev1/keymaps/333fred/rules.mk
@@ -1,5 +1,4 @@
 RGBLIGHT_ENABLE = yes
-BACKLIGHT_ENABLE = no
 NKRO_ENABLE = yes
 KEY_LOCK_ENABLE = yes
 TAP_DANCE_ENABLE = yes
diff --git a/keyboards/zen/keymaps/jwlawrence/config.h b/keyboards/zen/rev1/keymaps/default/config.h
index 38e4d73f0d..4a549c5b1f 100644
--- a/keyboards/zen/keymaps/jwlawrence/config.h
+++ b/keyboards/zen/rev1/keymaps/default/config.h
@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_USER_H
-#define CONFIG_USER_H
+#pragma once
 
 #include "config_common.h"
 
@@ -37,5 +36,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_HUE_STEP 8
 #define RGBLIGHT_SAT_STEP 8
 #define RGBLIGHT_VAL_STEP 8
-
-#endif
diff --git a/keyboards/zen/keymaps/default/keymap.c b/keyboards/zen/rev1/keymaps/default/keymap.c
index b2adffd1e7..b2adffd1e7 100644
--- a/keyboards/zen/keymaps/default/keymap.c
+++ b/keyboards/zen/rev1/keymaps/default/keymap.c
diff --git a/keyboards/zen/rev1/keymaps/default/rules.mk b/keyboards/zen/rev1/keymaps/default/rules.mk
new file mode 100644
index 0000000000..1e3cebb145
--- /dev/null
+++ b/keyboards/zen/rev1/keymaps/default/rules.mk
@@ -0,0 +1 @@
+RGBLIGHT_ENABLE = yes
diff --git a/keyboards/zen/keymaps/default/config.h b/keyboards/zen/rev1/keymaps/jwlawrence/config.h
index d813085e46..d813085e46 100644
--- a/keyboards/zen/keymaps/default/config.h
+++ b/keyboards/zen/rev1/keymaps/jwlawrence/config.h
diff --git a/keyboards/zen/keymaps/jwlawrence/keymap.c b/keyboards/zen/rev1/keymaps/jwlawrence/keymap.c
index 13edd0db8d..13edd0db8d 100644
--- a/keyboards/zen/keymaps/jwlawrence/keymap.c
+++ b/keyboards/zen/rev1/keymaps/jwlawrence/keymap.c
diff --git a/keyboards/zen/rev1/keymaps/jwlawrence/rules.mk b/keyboards/zen/rev1/keymaps/jwlawrence/rules.mk
new file mode 100644
index 0000000000..1e3cebb145
--- /dev/null
+++ b/keyboards/zen/rev1/keymaps/jwlawrence/rules.mk
@@ -0,0 +1 @@
+RGBLIGHT_ENABLE = yes
diff --git a/keyboards/zen/keymaps/kageurufu/keymap.c b/keyboards/zen/rev1/keymaps/kageurufu/keymap.c
index 761100dbe5..75884635cd 100644
--- a/keyboards/zen/keymaps/kageurufu/keymap.c
+++ b/keyboards/zen/rev1/keymaps/kageurufu/keymap.c
@@ -1,8 +1,8 @@
 #include QMK_KEYBOARD_H
 #include "kageurufu.h"
 #ifdef PROTOCOL_LUFA
-#include "lufa.h"
-#include "split_util.h"
+  #include "lufa.h"
+  #include "split_util.h"
 #endif
 
 extern keymap_config_t keymap_config;
diff --git a/keyboards/zen/keymaps/xyverz/config.h b/keyboards/zen/rev1/keymaps/xyverz/config.h
index 818f899897..d3e21ea172 100644
--- a/keyboards/zen/keymaps/xyverz/config.h
+++ b/keyboards/zen/rev1/keymaps/xyverz/config.h
@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_USER_H
-#define CONFIG_USER_H
+#pragma once
 
 #include "config_common.h"
 
@@ -31,5 +30,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_HUE_STEP 8
 #define RGBLIGHT_SAT_STEP 8
 #define RGBLIGHT_VAL_STEP 8
-
-#endif
diff --git a/keyboards/zen/keymaps/xyverz/keymap.c b/keyboards/zen/rev1/keymaps/xyverz/keymap.c
index 6250086ed9..6250086ed9 100644
--- a/keyboards/zen/keymaps/xyverz/keymap.c
+++ b/keyboards/zen/rev1/keymaps/xyverz/keymap.c
diff --git a/keyboards/zen/rev1/keymaps/xyverz/rules.mk b/keyboards/zen/rev1/keymaps/xyverz/rules.mk
new file mode 100644
index 0000000000..1e3cebb145
--- /dev/null
+++ b/keyboards/zen/rev1/keymaps/xyverz/rules.mk
@@ -0,0 +1 @@
+RGBLIGHT_ENABLE = yes
diff --git a/keyboards/zen/rev1/rev1.h b/keyboards/zen/rev1/rev1.h
index c2444f047f..a12f2ea789 100644
--- a/keyboards/zen/rev1/rev1.h
+++ b/keyboards/zen/rev1/rev1.h
@@ -1,5 +1,4 @@
-#ifndef REV1_H
-#define REV1_H
+#pragma once
 
 #include "zen.h"
 
@@ -36,5 +35,3 @@
         { k80, k81, k82, k83, k84, k85, KC_NO }, \
         { k90, k91, k92, k93, k94, k95, k96 } \
     }
-
-#endif
diff --git a/keyboards/zen/rev1/rules.mk b/keyboards/zen/rev1/rules.mk
index d7463419b4..e69de29bb2 100644
--- a/keyboards/zen/rev1/rules.mk
+++ b/keyboards/zen/rev1/rules.mk
@@ -1,2 +0,0 @@
-RGBLIGHT_ENABLE = yes
-BACKLIGHT_ENABLE = yes
diff --git a/keyboards/zen/rev2/config.h b/keyboards/zen/rev2/config.h
new file mode 100644
index 0000000000..dc37472f6b
--- /dev/null
+++ b/keyboards/zen/rev2/config.h
@@ -0,0 +1,98 @@
+/*
+Copyright 2017 Danny Nguyen <danny@hexwire.com>
+
+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
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x3061
+#define DEVICE_VER      0x0002
+#define MANUFACTURER    Legonut
+#define PRODUCT         "Project Zen"
+#define DESCRIPTION     "Split gaming keyboard"
+
+/* key matrix size */
+// Rows are doubled-up
+
+// wiring of each half
+#ifdef CONVERT_TO_PROTON_C
+  #define MATRIX_ROWS 5
+  #define MATRIX_COLS 7
+#else
+  #define MATRIX_ROWS 10
+  #define MATRIX_COLS 7
+#endif
+
+// Proton-C does pin conversion
+#define MATRIX_ROW_PINS { C6, E6, B5, D7, B4 }
+#define MATRIX_COL_PINS { F4, F5, F6, F7, B3, B1, B2 }
+
+#define NUMBER_OF_ENCODERS 1
+
+#define ENCODERS_PAD_A  { D4 }
+#define ENCODERS_PAD_B  { D2 }
+
+#define RGB_DI_PIN         B6
+#define SOFT_SERIAL_PIN    D3
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* define if matrix has ghost */
+//#define MATRIX_HAS_GHOST
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCING_DELAY 5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* ws2812 RGB LED */
+#define RGBLED_NUM 34    // Number of LEDs
+
+// If using 90 Degree rotation, increase block cout
+#ifdef OLED_ROTATE90
+  #define OLED_DISPLAY_CUSTOM
+  #define OLED_DISPLAY_WIDTH 128
+  #define OLED_DISPLAY_HEIGHT 32
+  #define OLED_MATRIX_SIZE (OLED_DISPLAY_HEIGHT / 8 * OLED_DISPLAY_WIDTH) // 512 (compile time mathed)
+  #define OLED_BLOCK_TYPE uint16_t // Type to use for segmenting the oled display for smart rendering, use unsigned types only
+  #define OLED_BLOCK_COUNT (sizeof(OLED_BLOCK_TYPE) * 8) // 8 (compile time mathed)
+  #define OLED_BLOCK_SIZE (OLED_MATRIX_SIZE / OLED_BLOCK_COUNT) // 32 (compile time mathed)
+  #define OLED_SOURCE_MAP { 0, 8, 16, 24 }
+  #define OLED_TARGET_MAP { 24, 16, 8, 0 }
+#endif
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+// #define NO_DEBUG
+
+/* disable print */
+// #define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
diff --git a/keyboards/zen/rev2/keymaps/debug/keymap.c b/keyboards/zen/rev2/keymaps/debug/keymap.c
new file mode 100644
index 0000000000..e2d3d6a356
--- /dev/null
+++ b/keyboards/zen/rev2/keymaps/debug/keymap.c
@@ -0,0 +1,19 @@
+#include QMK_KEYBOARD_H
+#include <stdio.h>
+
+// extern keymap_config_t keymap_config;
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { { { KC_TRNS } } };
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    static char buf[10] = " ";
+
+    if (record->event.pressed) {
+      snprintf(buf, 10, "C%dR%d ", record->event.key.col, record->event.key.row);
+
+      send_string(buf);
+    }
+    return false;
+
+  return true;
+}
diff --git a/keyboards/zen/rev2/keymaps/default/keymap.c b/keyboards/zen/rev2/keymaps/default/keymap.c
new file mode 100644
index 0000000000..41003e4a55
--- /dev/null
+++ b/keyboards/zen/rev2/keymaps/default/keymap.c
@@ -0,0 +1,117 @@
+#include QMK_KEYBOARD_H
+
+extern keymap_config_t keymap_config;
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+#define _QWERTY 0
+#define _NAV 2
+
+
+enum custom_keycodes {
+  QWERTY = SAFE_RANGE,
+  NAV,
+
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  /* Qwerty
+   * ,-----------------------------------------.              .-----------------------------------------.
+   * | GESC |   1  |   2  |   3  |   4  |   5  |              |   6  |   7  |   8  |   9  |   0  | Bksp |
+   * |------+------+------+------+------+------|              |------+------+------+------+------+------|
+   * | Tab  |   Q  |   W  |   E  |   R  |   T  |              |   Y  |   U  |   I  |   O  |   P  |   \  |
+   * |------+------+------+------+------+------|              |------+------+------+------+------+------|
+   * |CAPS(NAV)|A  |   S  |   D  |   F  |   G  |              |   H  |   J  |   K  |   L  |   ;  |  "   |
+   * |------+------+------+------+------+------+------..------+------+------+------+------+------+------|
+   * | Shift|   Z  |   X  |   C  |   V  |   B  |RGBPrv||RGBNxt|   N  |   M  |   ,  |   .  |   /  |Enter |
+   * |------+------+------+------+------+------+------||------+------+------+------+------+------+------|
+   * | Ctrl | GUI  | Alt  |RGBTOG| NAV  |Space |Delete||Enter |Space |  NAV |   -  |   =  | PGUP | PGDN |
+   * `----------------------------------+-------------''------------------------------------------------'
+   *                                    |Space |Delete||Enter |Space |
+   *                                    '-------------''-------------'
+   */
+  [_QWERTY] = LAYOUT( \
+    KC_GESC,          KC_1,    KC_2,    KC_3,    KC_4,     KC_5,                       KC_6,     KC_7,     KC_8,    KC_9,    KC_0,    KC_BSPC, \
+    KC_TAB,           KC_Q,    KC_W,    KC_E,    KC_R,     KC_T,                       KC_Y,     KC_U,     KC_I,    KC_O,    KC_P,    KC_BSLS, \
+    LT(_NAV, KC_CAPS),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,    RGB_RMOD,RGB_MOD,  KC_N,     KC_M,     KC_COMM, KC_DOT,  KC_SLSH, KC_ENT,  \
+    KC_LCTL,          KC_LGUI, KC_LALT, RGB_TOG, MO(_NAV), KC_SPC,  KC_DEL,  KC_ENT,   KC_SPACE, MO(_NAV), KC_MINS, KC_EQL,  KC_PGUP, KC_PGDN, \
+                                                           KC_SPC,  KC_DEL,  KC_ENT,   KC_SPACE \
+  ),
+
+  /* NAV
+   * ,-----------------------------------------.              .-----------------------------------------.
+   * | GESC |   1  |   2  |   3  |   4  |   5  |              |   6  |   7  |   8  |   9  |   0  | Bksp |
+   * |------+------+------+------+------+------|              |------+------+------+------+------+------|
+   * | Tab  |   Q  |   W  |   E  |   R  |   T  |              |   Y  |   U  |   I  |   O  |   P  |   \  |
+   * |------+------+------+------+------+------|              |------+------+------+------+------+------|
+   * |CAPS(NAV)|A  |   S  |   D  |   F  |   G  |              |   H  |   J  |   K  |   L  |   ;  |  "   |
+   * |------+------+------+------+------+------+------..------+------+------+------+------+------+------|
+   * | Shift|   Z  |   X  |   C  |   V  |   B  |      ||      |   N  |   M  |   ,  |   .  |   /  |Enter |
+   * |------+------+------+------+------+------+------||------+------+------+------+------+------+------|
+   * | Ctrl | GUI  | Alt  |RGBTOG| NAV  |Space |Delete||Enter |Space |  NAV |   -  |   =  | PGUP | PGDN |
+   * `----------------------------------+-------------''------------------------------------------------'
+   *                                    |Space |Delete||Enter |Space |
+   *                                    '-------------''-------------'
+   */
+  [_NAV] = LAYOUT( \
+    KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,                     KC_F7,   KC_F8,    KC_F9,   KC_F10,  KC_F11,  KC_F12,  \
+    _______, RGB_SAI, RGB_VAI, RGB_SAD, RESET,   KC_LBRC,                   KC_RBRC, KC_PGUP,  KC_UP,   KC_PGDN, KC_INS,  KC_HOME, \
+    _______, RGB_HUD, RGB_VAD, RGB_HUI, _______, _______,                   _______, KC_LEFT,  KC_DOWN, KC_RGHT, KC_DEL,  KC_END,  \
+    KC_LSFT, _______, _______, _______, _______, _______, _______, _______, _______, _______,  _______, KC_MPLY, KC_MPRV, KC_MNXT, \
+    KC_LCTL, KC_LGUI, KC_LALT, RGB_MOD, _______, _______, _______, _______, _______, _______,  _______, KC_MUTE, KC_VOLU, KC_VOLD, \
+                                                 _______, _______, _______, _______
+  ),
+
+};
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+  if (index == 0) { /* First encoder */
+    if (clockwise) {
+      tap_code(KC_PGDN);
+    } else {
+      tap_code(KC_PGUP);
+    }
+  } else if (index == 1) { /* Second encoder from slave */
+    if (clockwise) {
+      tap_code(KC_UP);
+    } else {
+      tap_code(KC_DOWN);
+    }
+  }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case QWERTY:
+      if (record->event.pressed) {
+        set_single_persistent_default_layer(1UL<<_QWERTY);
+      }
+      return false;
+      break;
+    //case COLEMAK:
+      //if (record->event.pressed) {
+        //set_single_persistent_default_layer(1UL<<_COLEMAK);
+      //}
+      //return false;
+      //break;
+  }
+  return true;
+}
+
+
+#if OLED_DRIVER_ENABLE
+const char* layer_name_user(uint32_t layer) {
+  switch (layer) {
+    case _QWERTY:
+      return PSTR("QWRTY");
+    case _NAV:
+      return PSTR("NAV\n");
+    default:
+      return PSTR("UNDEF");
+  }
+}
+#endif
diff --git a/keyboards/zen/rev2/rev2.c b/keyboards/zen/rev2/rev2.c
new file mode 100644
index 0000000000..4104460db1
--- /dev/null
+++ b/keyboards/zen/rev2/rev2.c
@@ -0,0 +1,66 @@
+#include "rev2.h"
+
+#ifdef OLED_DRIVER_ENABLE
+#include "split_util.h"
+#include "oled_driver.h"
+
+__attribute__((weak))
+void render_logo(void) {
+  static const char PROGMEM sol_logo[] = {
+    0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,0x90,0x91,0x92,0x93,0x94,
+    0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,0xb0,0xb1,0xb2,0xb3,0xb4,
+    0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,0xd2,0xd3,0xd4,0};
+
+  oled_write_P(sol_logo, false);
+}
+
+__attribute__((weak))
+const char* layer_name_user(uint32_t layer) {
+  switch (layer) {
+    default:
+      return PSTR("UNDEF\n");
+  }
+}
+
+__attribute__((weak))
+void render_status(void) {
+  // Setup for 90 degree rendering because it's awesome!
+  // It can house 16 lines of text, with 5 letters each line
+  // Render to mode icon
+  static const char PROGMEM mode_logo[2][4] = {
+    {0x97,0x98,0x0a,0},
+    {0xb7,0xb8,0x0a,0} };
+
+  oled_write_P(mode_logo[0], false); // Line 1
+  oled_write_P(mode_logo[1], false); // Line 2
+
+  // Define layers here, Have not worked out how to have text displayed for each layer. Copy down the number you see and add a case for it below
+  oled_set_cursor(0, 3); // Line 3
+  oled_write_P(PSTR("Layer"), false); // Line 4
+  oled_write_P(layer_name_user(biton32(layer_state)), false);
+
+  // Host Keyboard LED Status
+  uint8_t led_usb_state = host_keyboard_leds();
+  oled_set_cursor(0, OLED_MAX_LINES - 4); // Line 13
+  oled_write_P(led_usb_state & (1<<USB_LED_NUM_LOCK) ? PSTR("NUMLK") : PSTR("     "), false); // Line 14
+  oled_write_P(led_usb_state & (1<<USB_LED_CAPS_LOCK) ? PSTR("CAPLK") : PSTR("     "), false); // Line 15
+  oled_write_P(led_usb_state & (1<<USB_LED_SCROLL_LOCK) ? PSTR("SCRLK") : PSTR("     "), false); // Line 16
+}
+
+#ifdef OLED_ROTATE90
+bool oled_init_user(bool flip180) {
+  return true;
+}
+#endif
+
+__attribute__((weak))
+void oled_task_user(void) {
+  if (is_keyboard_master()) {
+    render_status();
+  } else {
+    render_logo();
+    oled_scroll_left();
+  }
+}
+
+#endif
diff --git a/keyboards/zen/rev2/rev2.h b/keyboards/zen/rev2/rev2.h
new file mode 100644
index 0000000000..101622988d
--- /dev/null
+++ b/keyboards/zen/rev2/rev2.h
@@ -0,0 +1,56 @@
+#pragma once
+
+#include "zen.h"
+
+//void promicro_bootloader_jmp(bool program);
+#include "quantum.h"
+
+
+#ifdef USE_I2C
+#include <stddef.h>
+#ifdef __AVR__
+    #include <avr/io.h>
+    #include <avr/interrupt.h>
+#endif
+#endif
+
+//void promicro_bootloader_jmp(bool program);
+
+#ifdef CONVERT_TO_PROTON_C
+  #define LAYOUT( \
+      k00, k01, k02, k03, k04, k05,             k55, k54, k53, k52, k51, k50, \
+      k10, k11, k12, k13, k14, k15,             k65, k64, k63, k62, k61, k60, \
+      k20, k21, k22, k23, k24, k25,             k75, k74, k73, k72, k71, k70, \
+      k30, k31, k32, k33, k34, k35, k16,   k66, k85, k84, k83, k82, k81, k80, \
+      k40, k41, k42, k43, k44, k36, k26,   k76, k86, k94, k93, k92, k91, k90, \
+                               k45, k46,   k96, k95 \
+      ) \
+      { \
+          { k00, k01, k02, k03, k04, k05, KC_NO }, \
+          { k10, k11, k12, k13, k14, k15, k16 }, \
+          { k20, k21, k22, k23, k24, k25, k26 }, \
+          { k30, k31, k32, k33, k34, k35, k36 }, \
+          { k40, k41, k42, k43, k44, k45, k46 } \
+      }
+#else
+  #define LAYOUT( \
+      k00, k01, k02, k03, k04, k05,             k55, k54, k53, k52, k51, k50, \
+      k10, k11, k12, k13, k14, k15,             k65, k64, k63, k62, k61, k60, \
+      k20, k21, k22, k23, k24, k25,             k75, k74, k73, k72, k71, k70, \
+      k30, k31, k32, k33, k34, k35, k16,   k66, k85, k84, k83, k82, k81, k80, \
+      k40, k41, k42, k43, k44, k36, k26,   k76, k86, k94, k93, k92, k91, k90, \
+                               k45, k46,   k96, k95 \
+      ) \
+      { \
+          { k00, k01, k02, k03, k04, k05, KC_NO }, \
+          { k10, k11, k12, k13, k14, k15, k16 }, \
+          { k20, k21, k22, k23, k24, k25, k26 }, \
+          { k30, k31, k32, k33, k34, k35, k36 }, \
+          { k40, k41, k42, k43, k44, k45, k46 }, \
+          { k50, k51, k52, k53, k54, k55, KC_NO }, \
+          { k60, k61, k62, k63, k64, k65, k66 }, \
+          { k70, k71, k72, k73, k74, k75, k76 }, \
+          { k80, k81, k82, k83, k84, k85, k86 }, \
+          { k90, k91, k92, k93, k94, k95, k96 } \
+      }
+#endif
diff --git a/keyboards/zen/rev2/rules.mk b/keyboards/zen/rev2/rules.mk
new file mode 100644
index 0000000000..d1fe410525
--- /dev/null
+++ b/keyboards/zen/rev2/rules.mk
@@ -0,0 +1,14 @@
+ENCODER_ENABLE = yes
+
+OLED_DRIVER_ENABLE = no
+OLED_ROTATE90 = yes
+
+# Setup so that OLED and 90 degree rotation can be turned on/off easily
+# with "OLED_DRIVER_ENABLE = yes" or "OLED_ROTATE90 = no" in user's rules.mk file
+ifeq ($(strip $(OLED_DRIVER_ENABLE)), yes)
+  # Custom local font file
+  OPT_DEFS += -DOLED_FONT_H=\"common/glcdfont.c\"
+  ifeq ($(strip $(OLED_DRIVER_ENABLE)), yes)
+    OPT_DEFS += -DOLED_ROTATE90
+  endif
+endif
diff --git a/keyboards/zen/rules.mk b/keyboards/zen/rules.mk
index 4e82689111..f5d64a7f03 100644
--- a/keyboards/zen/rules.mk
+++ b/keyboards/zen/rules.mk
@@ -1,51 +1,26 @@
-SRC += matrix.c \
-	   split_util.c \
-	   serial.c
-
-# MCU name
-#MCU = at90usb1287
+# Pro Micro or Elite-C
+# Automagically converted to Proton-C
 MCU = atmega32u4
-
-# Processor frequency.
-#     This will define a symbol, F_CPU, in all source code files equal to the
-#     processor frequency in Hz. You can then use this symbol in your source code to
-#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
-#     automatically to create a 32-bit value in your source code.
-#
-#     This will be an integer division of F_USB below, as it is sourced by
-#     F_USB after it has run through any CPU prescalers. Note that this value
-#     does not *change* the processor frequency - it should merely be updated to
-#     reflect the processor speed set externally so that the code can use accurate
-#     software delays.
 F_CPU = 16000000
-
-#
-# LUFA specific
-#
-# Target architecture (see library "Board Types" documentation).
 ARCH = AVR8
-
-# Input clock frequency.
-#     This will define a symbol, F_USB, in all source code files equal to the
-#     input clock frequency (before any prescaling is performed) in Hz. This value may
-#     differ from F_CPU if prescaling is used on the latter, and is required as the
-#     raw input clock is fed directly to the PLL sections of the AVR for high speed
-#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
-#     at the end, this will be done automatically to create a 32-bit value in your
-#     source code.
-#
-#     If no clock division is performed on the input clock inside the AVR (via the
-#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
+BOOTLOADER = dfu
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-# Bootloader
-#     This definition is optional, and if your keyboard supports multiple bootloaders of
-#     different sizes, comment this out, and the correct address will be loaded 
-#     automatically (+60). See bootloader.mk for all options.
-BOOTLOADER = caterina
+ifeq ($(strip $(CTPC)), yes)
+  CONVERT_TO_PROTON_C=yes
+endif
 
-# Interrupt driven control endpoint task(+60)
-OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+ifeq ($(strip $(CONVERT_TO_PROTON_C)), yes)
+  SPLIT_KEYBOARD = no       # currently unsupported on ARM
+  RGBLIGHT_ENABLE = no      # currently unsupported on ARM
+
+  EXTRAFLAGS += -DUSE_PROTON_C
+else
+  # Currently moved to Pro Micro only section because of lack of Proton-C support
+  SPLIT_KEYBOARD = yes
+  RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight.
+endif
 
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
@@ -57,17 +32,11 @@ EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 CONSOLE_ENABLE = no         # Console for debug(+400)
 COMMAND_ENABLE = yes        # Commands for debug and configuration
 NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
 MIDI_ENABLE = no            # MIDI controls
 AUDIO_ENABLE = no           # Audio output on port C6
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
-RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight. 
-SUBPROJECT_rev1 = yes
-USE_I2C = no
-# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
-CUSTOM_MATRIX = yes
+SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
-DEFAULT_FOLDER = zen/rev1
+DEFAULT_FOLDER = zen/rev2
diff --git a/keyboards/zen/serial.c b/keyboards/zen/serial.c
deleted file mode 100644
index 74bcbb6bf6..0000000000
--- a/keyboards/zen/serial.c
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- * WARNING: be careful changing this code, it is very timing dependent
- */
-
-#ifndef F_CPU
-#define F_CPU 16000000
-#endif
-
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <util/delay.h>
-#include <stdbool.h>
-#include "serial.h"
-
-#ifndef USE_I2C
-
-// Serial pulse period in microseconds. Its probably a bad idea to lower this
-// value.
-#define SERIAL_DELAY 24
-
-uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
-uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
-
-#define SLAVE_DATA_CORRUPT (1<<0)
-volatile uint8_t status = 0;
-
-inline static
-void serial_delay(void) {
-  _delay_us(SERIAL_DELAY);
-}
-
-inline static
-void serial_output(void) {
-  SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
-}
-
-// make the serial pin an input with pull-up resistor
-inline static
-void serial_input(void) {
-  SERIAL_PIN_DDR  &= ~SERIAL_PIN_MASK;
-  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
-}
-
-inline static
-uint8_t serial_read_pin(void) {
-  return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
-}
-
-inline static
-void serial_low(void) {
-  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
-}
-
-inline static
-void serial_high(void) {
-  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
-}
-
-void serial_master_init(void) {
-  serial_output();
-  serial_high();
-}
-
-void serial_slave_init(void) {
-  serial_input();
-
-  // Enable INT0
-  EIMSK |= _BV(INT0);
-  // Trigger on falling edge of INT0
-  EICRA &= ~(_BV(ISC00) | _BV(ISC01));
-}
-
-// Used by the master to synchronize timing with the slave.
-static
-void sync_recv(void) {
-  serial_input();
-  // This shouldn't hang if the slave disconnects because the
-  // serial line will float to high if the slave does disconnect.
-  while (!serial_read_pin());
-  serial_delay();
-}
-
-// Used by the slave to send a synchronization signal to the master.
-static
-void sync_send(void) {
-  serial_output();
-
-  serial_low();
-  serial_delay();
-
-  serial_high();
-}
-
-// Reads a byte from the serial line
-static
-uint8_t serial_read_byte(void) {
-  uint8_t byte = 0;
-  serial_input();
-  for ( uint8_t i = 0; i < 8; ++i) {
-    byte = (byte << 1) | serial_read_pin();
-    serial_delay();
-    _delay_us(1);
-  }
-
-  return byte;
-}
-
-// Sends a byte with MSB ordering
-static
-void serial_write_byte(uint8_t data) {
-  uint8_t b = 8;
-  serial_output();
-  while( b-- ) {
-    if(data & (1 << b)) {
-      serial_high();
-    } else {
-      serial_low();
-    }
-    serial_delay();
-  }
-}
-
-// interrupt handle to be used by the slave device
-ISR(SERIAL_PIN_INTERRUPT) {
-  sync_send();
-
-  uint8_t checksum = 0;
-  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
-    serial_write_byte(serial_slave_buffer[i]);
-    sync_send();
-    checksum += serial_slave_buffer[i];
-  }
-  serial_write_byte(checksum);
-  sync_send();
-
-  // wait for the sync to finish sending
-  serial_delay();
-
-  // read the middle of pulses
-  _delay_us(SERIAL_DELAY/2);
-
-  uint8_t checksum_computed = 0;
-  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
-    serial_master_buffer[i] = serial_read_byte();
-    sync_send();
-    checksum_computed += serial_master_buffer[i];
-  }
-  uint8_t checksum_received = serial_read_byte();
-  sync_send();
-
-  serial_input(); // end transaction
-
-  if ( checksum_computed != checksum_received ) {
-    status |= SLAVE_DATA_CORRUPT;
-  } else {
-    status &= ~SLAVE_DATA_CORRUPT;
-  }
-}
-
-inline
-bool serial_slave_DATA_CORRUPT(void) {
-  return status & SLAVE_DATA_CORRUPT;
-}
-
-// Copies the serial_slave_buffer to the master and sends the
-// serial_master_buffer to the slave.
-//
-// Returns:
-// 0 => no error
-// 1 => slave did not respond
-int serial_update_buffers(void) {
-  // this code is very time dependent, so we need to disable interrupts
-  cli();
-
-  // signal to the slave that we want to start a transaction
-  serial_output();
-  serial_low();
-  _delay_us(1);
-
-  // wait for the slaves response
-  serial_input();
-  serial_high();
-  _delay_us(SERIAL_DELAY);
-
-  // check if the slave is present
-  if (serial_read_pin()) {
-    // slave failed to pull the line low, assume not present
-    sei();
-    return 1;
-  }
-
-  // if the slave is present syncronize with it
-  sync_recv();
-
-  uint8_t checksum_computed = 0;
-  // receive data from the slave
-  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
-    serial_slave_buffer[i] = serial_read_byte();
-    sync_recv();
-    checksum_computed += serial_slave_buffer[i];
-  }
-  uint8_t checksum_received = serial_read_byte();
-  sync_recv();
-
-  if (checksum_computed != checksum_received) {
-    sei();
-    return 1;
-  }
-
-  uint8_t checksum = 0;
-  // send data to the slave
-  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
-    serial_write_byte(serial_master_buffer[i]);
-    sync_recv();
-    checksum += serial_master_buffer[i];
-  }
-  serial_write_byte(checksum);
-  sync_recv();
-
-  // always, release the line when not in use
-  serial_output();
-  serial_high();
-
-  sei();
-  return 0;
-}
-
-#endif
diff --git a/keyboards/zen/serial.h b/keyboards/zen/serial.h
deleted file mode 100644
index 15fe4db7b4..0000000000
--- a/keyboards/zen/serial.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#ifndef MY_SERIAL_H
-#define MY_SERIAL_H
-
-#include "config.h"
-#include <stdbool.h>
-
-/* TODO:  some defines for interrupt setup */
-#define SERIAL_PIN_DDR DDRD
-#define SERIAL_PIN_PORT PORTD
-#define SERIAL_PIN_INPUT PIND
-#define SERIAL_PIN_MASK _BV(PD0)
-#define SERIAL_PIN_INTERRUPT INT0_vect
-
-#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
-#define SERIAL_MASTER_BUFFER_LENGTH 1
-
-// Buffers for master - slave communication
-extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
-extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
-
-void serial_master_init(void);
-void serial_slave_init(void);
-int serial_update_buffers(void);
-bool serial_slave_data_corrupt(void);
-
-#endif
diff --git a/keyboards/zen/split_rgb.c b/keyboards/zen/split_rgb.c
deleted file mode 100644
index 6d7cb44cf0..0000000000
--- a/keyboards/zen/split_rgb.c
+++ /dev/null
@@ -1,41 +0,0 @@
-#include <stdint.h>
-#include <stdbool.h>
-#include "split_util.h"
-#include "progmem.h"
-#include "print.h"
-#include "rgblight.h"
-
-#ifdef USE_I2C
-#  include "i2c.h"
-#else // USE_SERIAL
-#  include "serial.h"
-#endif
-
-
-rgblight_config_t rgblight_config;
-
-void rgblight_slave_update(void) {
-  //rgblight_effect_christmas();
-}
-
-
-void rgblight_set(void) {
-  if (rgblight_config.enable) {
-    #ifdef RGBW
-      ws2812_setleds_rgbw(led, RGBLED_NUM);
-    #else
-      ws2812_setleds(led, RGBLED_NUM);
-    #endif
-  } else {
-    for (uint8_t i = 0; i < RGBLED_NUM; i++) {
-      led[i].r = 0;
-      led[i].g = 0;
-      led[i].b = 0;
-    }
-    #ifdef RGBW
-      ws2812_setleds_rgbw(led, RGBLED_NUM);
-    #else
-      ws2812_setleds(led, RGBLED_NUM);
-    #endif
-  }
-}
diff --git a/keyboards/zen/split_rgb.h b/keyboards/zen/split_rgb.h
deleted file mode 100644
index 5f552890af..0000000000
--- a/keyboards/zen/split_rgb.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef SPLIT_RGB_H
-#define SPLIT_RGB_H
-
-void rgblight_slave_update(void);
-
-#endif
diff --git a/keyboards/zen/split_util.c b/keyboards/zen/split_util.c
deleted file mode 100644
index 346cbc9089..0000000000
--- a/keyboards/zen/split_util.c
+++ /dev/null
@@ -1,86 +0,0 @@
-#include <avr/io.h>
-#include <avr/wdt.h>
-#include <avr/power.h>
-#include <avr/interrupt.h>
-#include <util/delay.h>
-#include <avr/eeprom.h>
-#include "split_util.h"
-#include "matrix.h"
-#include "keyboard.h"
-#include "config.h"
-#include "timer.h"
-
-#ifdef USE_I2C
-#  include "i2c.h"
-#else
-#  include "serial.h"
-#endif
-
-volatile bool isLeftHand = true;
-
-static void setup_handedness(void) {
-  #ifdef EE_HANDS
-    isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
-  #else
-    // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
-    #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
-      isLeftHand = !has_usb();
-    #else
-      isLeftHand = has_usb();
-    #endif
-  #endif
-}
-
-static void keyboard_master_setup(void) {
-#ifdef USE_I2C
-    i2c_master_init();
-#ifdef SSD1306OLED
-    matrix_master_OLED_init ();
-#endif
-#else
-    serial_master_init();
-#endif
-}
-
-static void keyboard_slave_setup(void) {
-  timer_init();
-#ifdef USE_I2C
-    i2c_slave_init(SLAVE_I2C_ADDRESS);
-#else
-    serial_slave_init();
-#endif
-}
-
-bool has_usb(void) {
-   USBCON |= (1 << OTGPADE); //enables VBUS pad
-   _delay_us(5);
-   return (USBSTA & (1<<VBUS));  //checks state of VBUS
-}
-
-void split_keyboard_setup(void) {
-   setup_handedness();
-
-   if (has_usb()) {
-      keyboard_master_setup();
-   } else {
-      keyboard_slave_setup();
-   }
-   sei();
-}
-
-void keyboard_slave_loop(void) {
-   matrix_init();
-
-   while (1) {
-      matrix_slave_scan();
-   }
-}
-
-// this code runs before the usb and keyboard is initialized
-void matrix_setup(void) {
-    split_keyboard_setup();
-
-    if (!has_usb()) {
-        keyboard_slave_loop();
-    }
-}
diff --git a/keyboards/zen/split_util.h b/keyboards/zen/split_util.h
deleted file mode 100644
index 595a0659e1..0000000000
--- a/keyboards/zen/split_util.h
+++ /dev/null
@@ -1,20 +0,0 @@
-#ifndef SPLIT_KEYBOARD_UTIL_H
-#define SPLIT_KEYBOARD_UTIL_H
-
-#include <stdbool.h>
-#include "eeconfig.h"
-
-#define SLAVE_I2C_ADDRESS           0x32
-
-extern volatile bool isLeftHand;
-
-// slave version of matix scan, defined in matrix.c
-void matrix_slave_scan(void);
-
-void split_keyboard_setup(void);
-bool has_usb(void);
-void keyboard_slave_loop(void);
-
-void matrix_master_OLED_init (void);
-
-#endif
diff --git a/keyboards/zen/zen.h b/keyboards/zen/zen.h
index 56fc64fe26..cee7652d62 100644
--- a/keyboards/zen/zen.h
+++ b/keyboards/zen/zen.h
@@ -1,7 +1,8 @@
-#ifndef ZEN_H
-#define ZEN_H
-
-#include "rev1.h"
-#include "quantum.h"
+#pragma once
 
+#if KEYBOARD_zen_rev1
+    #include "rev1.h"
+#elif KEYBOARD_zen_rev2
+    #include "rev2.h"
 #endif
+#include "quantum.h"