6 files changed, 174 insertions, 0 deletions
diff --git a/keyboards/mechlovin/hex4b/rev2/chconf.h b/keyboards/mechlovin/hex4b/rev2/chconf.h
new file mode 100644
index 0000000000..fe716d6552
--- /dev/null
+++ b/keyboards/mechlovin/hex4b/rev2/chconf.h
@@ -0,0 +1,24 @@
+/* Copyright 2020 QMK
+ *
+ * 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
+
+#define CH_CFG_ST_TIMEDELTA 0
+
+#define CH_CFG_USE_CONDVARS_TIMEOUT FALSE
+
+#include_next <chconf.h>
+
diff --git a/keyboards/mechlovin/hex4b/rev2/config.h b/keyboards/mechlovin/hex4b/rev2/config.h
new file mode 100644
index 0000000000..af956f3ec0
--- /dev/null
+++ b/keyboards/mechlovin/hex4b/rev2/config.h
@@ -0,0 +1,56 @@
+/*
+Copyright 2020 Team Mechlovin
+
+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 DEVICE_VER   0x0002
+#define PRODUCT      Hex-4B Rev.2
+
+
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+
+#define MATRIX_ROW_PINS { A4, B12, B13, B14, B15, A1 }
+#define MATRIX_COL_PINS { B11, B10, B2, B1, B0, A7, A6, A5, A3, C13, B7, B6, B5, B4, B3 }
+#define UNUSED_PINS
+
+#define LED_NUM_LOCK_PIN C15
+#define LED_CAPS_LOCK_PIN B9
+#define LED_SCROLL_LOCK_PIN A15
+//#define LED_COMPOSE_PIN B3
+//#define LED_KANA_PIN B4
+
+#define BACKLIGHT_PIN B8
+#define BACKLIGHT_LEVELS 5
+#define BACKLIGHT_PWM_DRIVER PWMD4
+#define BACKLIGHT_BREATHING
+
+/* Bootmagic Lite key configuration, Backspace */
+#define BOOTMAGIC_LITE_ROW 1
+#define BOOTMAGIC_LITE_COLUMN 14
+\ No newline at end of file
diff --git a/keyboards/mechlovin/hex4b/rev2/halconf.h b/keyboards/mechlovin/hex4b/rev2/halconf.h
new file mode 100644
index 0000000000..1f5149b1aa
--- /dev/null
+++ b/keyboards/mechlovin/hex4b/rev2/halconf.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 QMK
+ *
+ * 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
+
+#define HAL_USE_PWM TRUE
+
+#include_next <halconf.h>
+
diff --git a/keyboards/mechlovin/hex4b/rev2/mcuconf.h b/keyboards/mechlovin/hex4b/rev2/mcuconf.h
new file mode 100644
index 0000000000..10c578ca04
--- /dev/null
+++ b/keyboards/mechlovin/hex4b/rev2/mcuconf.h
@@ -0,0 +1,26 @@
+/* Copyright 2020 QMK
+ *
+ * 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_next <mcuconf.h>
+
+#undef STM32_PWM_USE_TIM4
+#define STM32_PWM_USE_TIM4 TRUE
+
+
+
diff --git a/keyboards/mechlovin/hex4b/rev2/readme.md b/keyboards/mechlovin/hex4b/rev2/readme.md
new file mode 100644
index 0000000000..328c869704
--- /dev/null
+++ b/keyboards/mechlovin/hex4b/rev2/readme.md
@@ -0,0 +1,28 @@
+# hex4b
+
+![hex4b](https://i.imgur.com/lArfGgHh.jpeg)
+
+A PCB for HEX.4B 75% keyboard.
+
+* Keyboard Maintainer: [Mechlovin' Studio](https://github.com/mechlovin)
+* Hardware Supported: Hex.4B Rev.2 PCB, APM32F103CBT6
+* Hardware Availability: [Hex Keyboard](https://hexkeyboards.com/)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make mechlovin/hex4b/rev2:default
+
+Flashing example for this keyboard:
+
+    make mechlovin/hex4b/rev2:default:flash
+
+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).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Bootloader reset**: Hold down the key at (0,13) in the matrix (Backspace) and plug in the keyboard
+* **Keycode in layout**: Press the key mapped to `RESET` if it is available
+* **Hardware reset**: Press reset button (located on the top side of the PCB)
+\ No newline at end of file
diff --git a/keyboards/mechlovin/hex4b/rev2/rules.mk b/keyboards/mechlovin/hex4b/rev2/rules.mk
new file mode 100644
index 0000000000..a61a25009b
--- /dev/null
+++ b/keyboards/mechlovin/hex4b/rev2/rules.mk
@@ -0,0 +1,18 @@
+# MCU name
+MCU = STM32F103
+
+# Bootloader selection
+BOOTLOADER = stm32duino
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = yes        # Console for debug
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+NKRO_ENABLE = yes           # Enable N-Key Rollover
+BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+AUDIO_ENABLE = no           # Audio output