Adds the Planck EZ, 3737 RGB, fixes out-of-tune notes (#5532)

* RGB Matrix overhaul
Breakout of animations to separate files
Integration of optimized int based math lib
Overhaul of rgb_matrix.c and animations for performance

* Updating effect function api for future extensions

* Combined the keypresses || keyreleases define checks into a single define so I stop forgetting it where necessary

* Moving define RGB_MATRIX_KEYREACTIVE_ENABLED earlier in the include chain

* Adds the Planck EZ, 3737 RGB, fixes out-of-tune notes

* fix bug in quantum/rgb_matrix_drivers.c

Co-Authored-By: jackhumbert <jack.humb@gmail.com>

* update command setting to the correct default

* correct rgb config

* remove commented-out lines

* update docs for the 3737

* Update docs/feature_rgb_matrix.md

Co-Authored-By: jackhumbert <jack.humb@gmail.com>

14 files changed, 956 insertions, 16 deletions

diff --git a/common_features.mk b/common_features.mk
index 046f94d1d..c3b6fa916 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -114,7 +114,7 @@ ifeq ($(strip $(RGBLIGHT_ENABLE)), yes)
     endif
 endif
 
-VALID_MATRIX_TYPES := yes IS31FL3731 IS31FL3733 custom
+VALID_MATRIX_TYPES := yes IS31FL3731 IS31FL3733 IS31FL3737 custom
 
 LED_MATRIX_ENABLE ?= no
 ifneq ($(strip $(LED_MATRIX_ENABLE)), no)
@@ -135,6 +135,7 @@ ifeq ($(strip $(LED_MATRIX_ENABLE)), IS31FL3731)
 endif
 
 RGB_MATRIX_ENABLE ?= no
+
 ifneq ($(strip $(RGB_MATRIX_ENABLE)), no)
 ifeq ($(filter $(RGB_MATRIX_ENABLE),$(VALID_MATRIX_TYPES)),)
     $(error RGB_MATRIX_ENABLE="$(RGB_MATRIX_ENABLE)" is not a valid matrix type)
@@ -151,19 +152,26 @@ ifeq ($(strip $(RGB_MATRIX_ENABLE)), yes)
 endif
 
 ifeq ($(strip $(RGB_MATRIX_ENABLE)), IS31FL3731)
-    OPT_DEFS += -DIS31FL3731
+    OPT_DEFS += -DIS31FL3731 -DSTM32_I2C -DHAL_USE_I2C=TRUE
     COMMON_VPATH += $(DRIVER_PATH)/issi
     SRC += is31fl3731.c
     SRC += i2c_master.c
 endif
 
 ifeq ($(strip $(RGB_MATRIX_ENABLE)), IS31FL3733)
-    OPT_DEFS += -DIS31FL3733
+    OPT_DEFS += -DIS31FL3733 -DSTM32_I2C -DHAL_USE_I2C=TRUE
     COMMON_VPATH += $(DRIVER_PATH)/issi
     SRC += is31fl3733.c
     SRC += i2c_master.c
 endif
 
+ifeq ($(strip $(RGB_MATRIX_ENABLE)), IS31FL3737)
+    OPT_DEFS += -DIS31FL3737 -DSTM32_I2C -DHAL_USE_I2C=TRUE
+    COMMON_VPATH += $(DRIVER_PATH)/issi
+    SRC += is31fl3737.c
+    SRC += i2c_master.c
+endif
+
 ifeq ($(strip $(TAP_DANCE_ENABLE)), yes)
     OPT_DEFS += -DTAP_DANCE_ENABLE
     SRC += $(QUANTUM_DIR)/process_keycode/process_tap_dance.c
diff --git a/docs/feature_rgb_matrix.md b/docs/feature_rgb_matrix.md
index ec1218954..36d9d0113 100644
--- a/docs/feature_rgb_matrix.md
+++ b/docs/feature_rgb_matrix.md
@@ -52,7 +52,9 @@ const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
 
 Where `Cx_y` is the location of the LED in the matrix defined by [the datasheet](http://www.issi.com/WW/pdf/31FL3731.pdf) and the header file `drivers/issi/is31fl3731.h`. The `driver` is the index of the driver you defined in your `config.h` (`0` or `1` right now).
 
-###  IS31FL3733
+###  IS31FL3733/IS31FL3737
+
+!> For the IS31FL3737, replace all instances of `IS31FL3733` below with `IS31FL3737`.
 
 There is basic support for addressable RGB matrix lighting with the I2C IS31FL3733 RGB controller. To enable it, add this to your `rules.mk`:
 
diff --git a/drivers/issi/is31fl3737.c b/drivers/issi/is31fl3737.c
new file mode 100644
index 000000000..649104927
--- /dev/null
+++ b/drivers/issi/is31fl3737.c
@@ -0,0 +1,252 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ *
+ * 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/>.
+ */
+
+#ifdef __AVR__
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#else
+#include "wait.h"
+#endif
+
+#include <string.h>
+#include "i2c_master.h"
+#include "progmem.h"
+#include "rgb_matrix.h"
+
+// This is a 7-bit address, that gets left-shifted and bit 0
+// set to 0 for write, 1 for read (as per I2C protocol)
+// The address will vary depending on your wiring:
+// 00 <-> GND
+// 01 <-> SCL
+// 10 <-> SDA
+// 11 <-> VCC
+// ADDR1 represents A1:A0 of the 7-bit address.
+// ADDR2 represents A3:A2 of the 7-bit address.
+// The result is: 0b101(ADDR2)(ADDR1)
+#define ISSI_ADDR_DEFAULT 0x50
+
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
+#define ISSI_INTERRUPTMASKREGISTER 0xF0
+#define ISSI_INTERRUPTSTATUSREGISTER 0xF1
+
+#define ISSI_PAGE_LEDCONTROL 0x00 //PG0
+#define ISSI_PAGE_PWM 0x01        //PG1
+#define ISSI_PAGE_AUTOBREATH 0x02 //PG2
+#define ISSI_PAGE_FUNCTION 0x03   //PG3
+
+#define ISSI_REG_CONFIGURATION 0x00 //PG3
+#define ISSI_REG_GLOBALCURRENT 0x01 //PG3
+#define ISSI_REG_RESET 0x11// PG3
+#define ISSI_REG_SWPULLUP 0x0F //PG3
+#define ISSI_REG_CSPULLUP 0x10 //PG3
+
+#ifndef ISSI_TIMEOUT
+  #define ISSI_TIMEOUT 100
+#endif
+
+#ifndef ISSI_PERSISTENCE
+  #define ISSI_PERSISTENCE 0
+#endif
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[20];
+
+// These buffers match the IS31FL3737 PWM registers.
+// The control buffers match the PG0 LED On/Off registers.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in IS31FL3737_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[DRIVER_COUNT][192];
+bool g_pwm_buffer_update_required = false;
+
+uint8_t g_led_control_registers[DRIVER_COUNT][24] = { { 0 } };
+bool g_led_control_registers_update_required = false;
+
+void IS31FL3737_write_register( uint8_t addr, uint8_t reg, uint8_t data )
+{
+    g_twi_transfer_buffer[0] = reg;
+    g_twi_transfer_buffer[1] = data;
+
+  #if ISSI_PERSISTENCE > 0
+    for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+      if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) == 0)
+        break;
+    }
+  #else
+    i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
+  #endif
+}
+
+void IS31FL3737_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer )
+{
+    // assumes PG1 is already selected
+
+    // transmit PWM registers in 12 transfers of 16 bytes
+    // g_twi_transfer_buffer[] is 20 bytes
+
+    // iterate over the pwm_buffer contents at 16 byte intervals
+    for ( int i = 0; i < 192; i += 16 ) {
+        g_twi_transfer_buffer[0] = i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
+        for ( int j = 0; j < 16; j++ ) {
+            g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
+        }
+
+    #if ISSI_PERSISTENCE > 0
+      for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) == 0)
+          break;
+      }
+    #else
+      i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT);
+    #endif
+    }
+}
+
+void IS31FL3737_init( uint8_t addr )
+{
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    // Unlock the command register.
+    IS31FL3737_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG0
+    IS31FL3737_write_register( addr, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL );
+    // Turn off all LEDs.
+    for ( int i = 0x00; i <= 0x17; i++ )
+    {
+        IS31FL3737_write_register( addr, i, 0x00 );
+    }
+
+    // Unlock the command register.
+    IS31FL3737_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG1
+    IS31FL3737_write_register( addr, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM );
+    // Set PWM on all LEDs to 0
+    // No need to setup Breath registers to PWM as that is the default.
+    for ( int i = 0x00; i <= 0xBF; i++ )
+    {
+        IS31FL3737_write_register( addr, i, 0x00 );
+    }
+
+    // Unlock the command register.
+    IS31FL3737_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG3
+    IS31FL3737_write_register( addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION );
+    // Set global current to maximum.
+    IS31FL3737_write_register( addr, ISSI_REG_GLOBALCURRENT, 0xFF );
+    // Disable software shutdown.
+    IS31FL3737_write_register( addr, ISSI_REG_CONFIGURATION, 0x01 );
+
+    // Wait 10ms to ensure the device has woken up.
+    #ifdef __AVR__
+    _delay_ms( 10 );
+    #else
+    wait_ms(10);
+    #endif
+}
+
+void IS31FL3737_set_color( int index, uint8_t red, uint8_t green, uint8_t blue )
+{
+    if ( index >= 0 && index < DRIVER_LED_TOTAL ) {
+        is31_led led = g_is31_leds[index];
+
+        g_pwm_buffer[led.driver][led.r] = red;
+        g_pwm_buffer[led.driver][led.g] = green;
+        g_pwm_buffer[led.driver][led.b] = blue;
+        g_pwm_buffer_update_required = true;
+    }
+}
+
+void IS31FL3737_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
+{
+    for ( int i = 0; i < DRIVER_LED_TOTAL; i++ )
+    {
+        IS31FL3737_set_color( i, red, green, blue );
+    }
+}
+
+void IS31FL3737_set_led_control_register( uint8_t index, bool red, bool green, bool blue )
+{
+    is31_led led = g_is31_leds[index];
+
+  uint8_t control_register_r = led.r / 8;
+  uint8_t control_register_g = led.g / 8;
+  uint8_t control_register_b = led.b / 8;
+  uint8_t bit_r = led.r % 8;
+  uint8_t bit_g = led.g % 8;
+  uint8_t bit_b = led.b % 8;
+
+    if ( red ) {
+        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
+    } else {
+        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
+    }
+    if ( green ) {
+        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
+    } else {
+        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
+    }
+    if ( blue ) {
+        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
+    } else {
+        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
+    }
+
+    g_led_control_registers_update_required = true;
+
+}
+
+void IS31FL3737_update_pwm_buffers( uint8_t addr1, uint8_t addr2 )
+{
+    if ( g_pwm_buffer_update_required )
+    {
+        // Firstly we need to unlock the command register and select PG1
+        IS31FL3737_write_register( addr1, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+        IS31FL3737_write_register( addr1, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM );
+
+        IS31FL3737_write_pwm_buffer( addr1, g_pwm_buffer[0] );
+        //IS31FL3737_write_pwm_buffer( addr2, g_pwm_buffer[1] );
+    }
+    g_pwm_buffer_update_required = false;
+}
+
+void IS31FL3737_update_led_control_registers( uint8_t addr1, uint8_t addr2 )
+{
+    if ( g_led_control_registers_update_required )
+    {
+        // Firstly we need to unlock the command register and select PG0
+        IS31FL3737_write_register( addr1, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+        IS31FL3737_write_register( addr1, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL );
+        for ( int i=0; i<24; i++ )
+        {
+            IS31FL3737_write_register(addr1, i, g_led_control_registers[0][i] );
+            //IS31FL3737_write_register(addr2, i, g_led_control_registers[1][i] );
+        }
+    }
+}
diff --git a/drivers/issi/is31fl3737.h b/drivers/issi/is31fl3737.h
new file mode 100644
index 000000000..69c4b9b53
--- /dev/null
+++ b/drivers/issi/is31fl3737.h
@@ -0,0 +1,207 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ *
+ * 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/>.
+ */
+
+
+#ifndef IS31FL3737_DRIVER_H
+#define IS31FL3737_DRIVER_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct is31_led {
+  uint8_t driver:2;
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+} __attribute__((packed)) is31_led;
+
+extern const is31_led g_is31_leds[DRIVER_LED_TOTAL];
+
+void IS31FL3737_init( uint8_t addr );
+void IS31FL3737_write_register( uint8_t addr, uint8_t reg, uint8_t data );
+void IS31FL3737_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer );
+
+void IS31FL3737_set_color( int index, uint8_t red, uint8_t green, uint8_t blue );
+void IS31FL3737_set_color_all( uint8_t red, uint8_t green, uint8_t blue );
+
+void IS31FL3737_set_led_control_register( uint8_t index, bool red, bool green, bool blue );
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void IS31FL3737_update_pwm_buffers( uint8_t addr1, uint8_t addr2 );
+void IS31FL3737_update_led_control_registers( uint8_t addr1, uint8_t addr2 );
+
+#define A_1   0x00
+#define A_2   0x01
+#define A_3   0x02
+#define A_4   0x03
+#define A_5   0x04
+#define A_6   0x05
+#define A_7   0x08
+#define A_8   0x09
+#define A_9   0x0A
+#define A_10  0x0B
+#define A_11  0x0C
+#define A_12  0x0D
+
+#define B_1   0x10
+#define B_2   0x11
+#define B_3   0x12
+#define B_4   0x13
+#define B_5   0x14
+#define B_6   0x15
+#define B_7   0x18
+#define B_8   0x19
+#define B_9   0x1A
+#define B_10  0x1B
+#define B_11  0x1C
+#define B_12  0x1D
+
+#define C_1   0x20
+#define C_2   0x21
+#define C_3   0x22
+#define C_4   0x23
+#define C_5   0x24
+#define C_6   0x25
+#define C_7   0x28
+#define C_8   0x29
+#define C_9   0x2A
+#define C_10  0x2B
+#define C_11  0x2C
+#define C_12  0x2D
+
+#define D_1   0x30
+#define D_2   0x31
+#define D_3   0x32
+#define D_4   0x33
+#define D_5   0x34
+#define D_6   0x35
+#define D_7   0x38
+#define D_8   0x39
+#define D_9   0x3A
+#define D_10  0x3B
+#define D_11  0x3C
+#define D_12  0x3D
+
+#define E_1   0x40
+#define E_2   0x41
+#define E_3   0x42
+#define E_4   0x43
+#define E_5   0x44
+#define E_6   0x45
+#define E_7   0x48
+#define E_8   0x49
+#define E_9   0x4A
+#define E_10  0x4B
+#define E_11  0x4C
+#define E_12  0x4D
+
+#define F_1   0x50
+#define F_2   0x51
+#define F_3   0x52
+#define F_4   0x53
+#define F_5   0x54
+#define F_6   0x55
+#define F_7   0x58
+#define F_8   0x59
+#define F_9   0x5A
+#define F_10  0x5B
+#define F_11  0x5C
+#define F_12  0x5D
+
+#define G_1   0x60
+#define G_2   0x61
+#define G_3   0x62
+#define G_4   0x63
+#define G_5   0x64
+#define G_6   0x65
+#define G_7   0x68
+#define G_8   0x69
+#define G_9   0x6A
+#define G_10  0x6B
+#define G_11  0x6C
+#define G_12  0x6D
+
+#define H_1   0x70
+#define H_2   0x71
+#define H_3   0x72
+#define H_4   0x73
+#define H_5   0x74
+#define H_6   0x75
+#define H_7   0x78
+#define H_8   0x79
+#define H_9   0x7A
+#define H_10  0x7B
+#define H_11  0x7C
+#define H_12  0x7D
+
+#define I_1   0x80
+#define I_2   0x81
+#define I_3   0x82
+#define I_4   0x83
+#define I_5   0x84
+#define I_6   0x85
+#define I_7   0x88
+#define I_8   0x89
+#define I_9   0x8A
+#define I_10  0x8B
+#define I_11  0x8C
+#define I_12  0x8D
+
+#define J_1   0x90
+#define J_2   0x91
+#define J_3   0x92
+#define J_4   0x93
+#define J_5   0x94
+#define J_6   0x95
+#define J_7   0x98
+#define J_8   0x99
+#define J_9   0x9A
+#define J_10  0x9B
+#define J_11  0x9C
+#define J_12  0x9D
+
+#define K_1   0xA0
+#define K_2   0xA1
+#define K_3   0xA2
+#define K_4   0xA3
+#define K_5   0xA4
+#define K_6   0xA5
+#define K_7   0xA8
+#define K_8   0xA9
+#define K_9   0xAA
+#define K_10  0xAB
+#define K_11  0xAC
+#define K_12  0xAD
+
+#define L_1   0xB0
+#define L_2   0xB1
+#define L_3   0xB2
+#define L_4   0xB3
+#define L_5   0xB4
+#define L_6   0xB5
+#define L_7   0xB8
+#define L_8   0xB9
+#define L_9   0xBA
+#define L_10  0xBB
+#define L_11  0xBC
+#define L_12  0xBD
+
+#endif // IS31FL3737_DRIVER_H
diff --git a/keyboards/planck/ez/config.h b/keyboards/planck/ez/config.h
new file mode 100644
index 000000000..c449d1719
--- /dev/null
+++ b/keyboards/planck/ez/config.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2018 Jack Humbert <jack.humb@gmail.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 DEVICE_VER 0x0000
+
+#undef MATRIX_ROWS
+#undef MATRIX_COLS
+/* key matrix size */
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 6
+
+/*
+ * 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)
+ *
+*/
+
+#undef MATRIX_ROW_PINS
+#undef MATRIX_COL_PINS
+
+#define MATRIX_ROW_PINS { A10, A9, A8, B15, C13, C14, C15, A2 }
+#define MATRIX_COL_PINS { B11, B10, B2, B1, A7, B0 }
+
+#define NUMBER_OF_ENCODERS 1
+#define ENCODERS_PAD_A { B12 }
+#define ENCODERS_PAD_B { B13 }
+
+#define MUSIC_MAP
+#undef AUDIO_VOICES
+#undef C6_AUDIO
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 6
+
+/* 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
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * 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
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+//#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 1
+
+// #define WS2812_LED_N 2
+// #define RGBLED_NUM WS2812_LED_N
+// #define WS2812_TIM_N 2
+// #define WS2812_TIM_CH 2
+// #define PORT_WS2812     GPIOA
+// #define PIN_WS2812      1
+// #define WS2812_DMA_STREAM STM32_DMA1_STREAM2  // DMA stream for TIMx_UP (look up in reference manual under DMA Channel selection)
+//#define WS2812_DMA_CHANNEL 7                  // DMA channel for TIMx_UP
+//#define WS2812_EXTERNAL_PULLUP
+
+#define DRIVER_ADDR_1 0b1010000
+#define DRIVER_ADDR_2 0b1010000 // this is here for compliancy reasons.
+
+#define DRIVER_COUNT 1
+#define DRIVER_1_LED_TOTAL 47
+#define DRIVER_LED_TOTAL DRIVER_1_LED_TOTAL
+
+#define RGB_MATRIX_KEYPRESSES
diff --git a/keyboards/planck/ez/ez.c b/keyboards/planck/ez/ez.c
new file mode 100644
index 000000000..b859af6c1
--- /dev/null
+++ b/keyboards/planck/ez/ez.c
@@ -0,0 +1,175 @@
+/* Copyright 2018 Jack Humbert <jack.humb@gmail.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/>.
+ */
+#include "ez.h"
+
+const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
+/* Refer to IS31 manual for these locations
+ *   driver
+ *   |  R location
+ *   |  |      G location
+ *   |  |      |      B location
+ *   |  |      |      | */
+    {0, A_12,  B_12,  C_12},
+    {0, A_11,  B_11,  C_11},
+    {0, A_10,  B_10,  C_10},
+    {0, A_9,   B_9,   C_9},
+    {0, A_8,   B_8,   C_8},
+    {0, A_7,   B_7,   C_7},
+
+    {0, G_12,  H_12,  I_12},
+    {0, G_11,  H_11,  I_11},
+    {0, G_10,  H_10,  I_10},
+    {0, G_9,   H_9,   I_9},
+    {0, G_8,   H_8,   I_8},
+    {0, G_7,   H_7,   I_7},
+
+    {0, A_6,   B_6,   C_6},
+    {0, A_5,   B_5,   C_5},
+    {0, A_4,   B_4,   C_4},
+    {0, A_3,   B_3,   C_3},
+    {0, A_2,   B_2,   C_2},
+    {0, A_1,   B_1,   C_1},
+
+    {0, G_6,   H_6,   I_6},
+    {0, G_5,   H_5,   I_5},
+    {0, G_4,   H_4,   I_4},
+    {0, G_3,   H_3,   I_3},
+    {0, G_2,   H_2,   I_2},
+    {0, G_1,   H_1,   I_1},
+
+    {0, D_12,  E_12,  F_12},
+    {0, D_11,  E_11,  F_11},
+    {0, D_10,  E_10,  F_10},
+    {0, D_9,   E_9,   F_9},
+    {0, D_8,   E_8,   F_8},
+    {0, D_7,   E_7,   F_7},
+
+    {0, J_12,  K_12,  L_12},
+    {0, J_11,  K_11,  L_11},
+    {0, J_10,  K_10,  L_10},
+    {0, J_9,   K_9,   L_9},
+    {0, J_8,   K_8,   L_8},
+    {0, J_7,   K_7,   L_7},
+
+    {0, D_6,   E_6,   F_6},
+    {0, D_5,   E_5,   F_5},
+    {0, D_4,   E_4,   F_4},
+    {0, D_3,   E_3,   F_3},
+    {0, D_2,   E_2,   F_2},
+    {0, D_1,   E_1,   F_1},
+
+    {0, J_6,   K_6,   L_6},
+    {0, J_5,   K_5,   L_5},
+    {0, J_4,   K_4,   L_4},
+    {0, J_3,   K_3,   L_3},
+    {0, J_2,   K_2,   L_2},
+
+};
+
+const rgb_led g_rgb_leds[DRIVER_LED_TOTAL] = {
+
+    /*{row | col << 4}
+      |             {x=0..224, y=0..64}
+      |              |                 modifier
+      |              |                 | */
+    {{0|(0<<4)},   {20.36*0, 21.33*0}, 1},
+    {{0|(1<<4)},   {20.36*1, 21.33*0}, 0},
+    {{0|(2<<4)},   {20.36*2, 21.33*0}, 0},
+    {{0|(3<<4)},   {20.36*3, 21.33*0}, 0},
+    {{0|(4<<4)},   {20.36*4, 21.33*0}, 0},
+    {{0|(5<<4)},   {20.36*5, 21.33*0}, 0},
+    {{4|(0<<4)},   {20.36*6, 21.33*0}, 0},
+    {{4|(1<<4)},   {20.36*7, 21.33*0}, 0},
+    {{4|(2<<4)},   {20.36*8, 21.33*0}, 0},
+    {{4|(3<<4)},   {20.36*9, 21.33*0}, 0},
+    {{4|(4<<4)},  {20.36*10,21.33*0}, 0},
+    {{4|(5<<4)},  {20.36*11,21.33*0}, 1},
+
+    {{1|(0<<4)},   {20.36*0, 21.33*1}, 1},
+    {{1|(1<<4)},   {20.36*1, 21.33*1}, 0},
+    {{1|(2<<4)},   {20.36*2, 21.33*1}, 0},
+    {{1|(3<<4)},   {20.36*3, 21.33*1}, 0},
+    {{1|(4<<4)},   {20.36*4, 21.33*1}, 0},
+    {{1|(5<<4)},   {20.36*5, 21.33*1}, 0},
+    {{5|(0<<4)},   {20.36*6, 21.33*1}, 0},
+    {{5|(1<<4)},   {20.36*7, 21.33*1}, 0},
+    {{5|(2<<4)},   {20.36*8, 21.33*1}, 0},
+    {{5|(3<<4)},   {20.36*9, 21.33*1}, 0},
+    {{5|(4<<4)},  {20.36*10,21.33*1}, 0},
+    {{5|(5<<4)},  {20.36*11,21.33*1}, 1},
+
+    {{2|(0<<4)},   {20.36*0, 21.33*2}, 1},
+    {{2|(1<<4)},   {20.36*1, 21.33*2}, 0},
+    {{2|(2<<4)},   {20.36*2, 21.33*2}, 0},
+    {{2|(3<<4)},   {20.36*3, 21.33*2}, 0},
+    {{2|(4<<4)},   {20.36*4, 21.33*2}, 0},
+    {{2|(5<<4)},   {20.36*5, 21.33*2}, 0},
+    {{6|(0<<4)},   {20.36*6, 21.33*2}, 0},
+    {{6|(1<<4)},   {20.36*7, 21.33*2}, 0},
+    {{6|(2<<4)},   {20.36*8, 21.33*2}, 0},
+    {{6|(3<<4)},   {20.36*9, 21.33*2}, 0},
+    {{6|(4<<4)},  {20.36*10,21.33*2}, 0},
+    {{6|(5<<4)},  {20.36*11,21.33*2}, 1},
+
+    {{3|(0<<4)},   {20.36*0, 21.33*3}, 1},
+    {{3|(1<<4)},   {20.36*1, 21.33*3}, 1},
+    {{3|(2<<4)},   {20.36*2, 21.33*3}, 1},
+    {{7|(3<<4)},   {20.36*3, 21.33*3}, 1},
+    {{7|(4<<4)},   {20.36*4, 21.33*3}, 1},
+    {{7|(5<<4)},   {20.36*5.5,21.33*3}, 0},
+    {{7|(0<<4)},   {20.36*7, 21.33*3}, 1},
+    {{7|(1<<4)},   {20.36*8, 21.33*3}, 1},
+    {{7|(2<<4)},   {20.36*9, 21.33*3}, 1},
+    {{3|(3<<4)},  {20.36*10,21.33*3}, 1},
+    {{3|(4<<4)},  {20.36*11,21.33*3}, 1}
+};
+
+void matrix_init_kb(void) {
+  matrix_init_user();
+
+  palSetPadMode(GPIOB, 8, PAL_MODE_OUTPUT_PUSHPULL);
+  palSetPadMode(GPIOB, 9, PAL_MODE_OUTPUT_PUSHPULL);
+
+  palClearPad(GPIOB, 8);
+  palClearPad(GPIOB, 9);
+}
+
+void matrix_scan_kb(void) {
+  matrix_scan_user();
+}
+
+uint32_t layer_state_set_kb(uint32_t state) {
+
+  palClearPad(GPIOB, 8);
+  palClearPad(GPIOB, 9);
+  state = layer_state_set_user(state);
+  uint8_t layer = biton32(state);
+  switch (layer) {
+      case 3:
+        palSetPad(GPIOB, 9);
+        break;
+      case 4:
+        palSetPad(GPIOB, 8);
+        break;
+      case 6:
+        palSetPad(GPIOB, 9);
+        palSetPad(GPIOB, 8);
+        break;
+      default:
+        break;
+    }
+    return state;
+}
diff --git a/keyboards/planck/ez/ez.h b/keyboards/planck/ez/ez.h
new file mode 100644
index 000000000..a3ca2b6ec
--- /dev/null
+++ b/keyboards/planck/ez/ez.h
@@ -0,0 +1,107 @@
+/* Copyright 2018 Jack Humbert <jack.humb@gmail.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
+
+#include "planck.h"
+
+#define LAYOUT_planck_1x2uC( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34,    k35,   k36, k37, k38, k39, k3a \
+) \
+{ \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k39, k3a, k3b }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k33, k34, k35 } \
+}
+
+#define LAYOUT_planck_1x2uR( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35,   k36,    k37, k38, k39, k3a \
+) \
+{ \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k39, k3a, k3b }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k33, k34, k35 } \
+}
+
+#define LAYOUT_planck_1x2uL( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33,   k34,    k35, k36, k37, k38, k39, k3a \
+) \
+{ \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k39, k3a, k3b }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k33, k34, k35 } \
+}
+
+#define LAYOUT_planck_2x2u( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33,   k34,      k36,    k37, k38, k39, k3a \
+) \
+{ \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k39, k3a, k3b }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k33, k34, k35 } \
+}
+
+#define LAYOUT_planck_grid( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35, KC_NO, k36, k37, k38, k39, k3a \
+) \
+{ \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k39, k3a, KC_NO }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k33, k34, k35 } \
+}
+
+#define KEYMAP LAYOUT_planck_grid
+#define LAYOUT_ortho_4x12 LAYOUT_planck_grid
+#define KC_LAYOUT_ortho_4x12 KC_KEYMAP
diff --git a/keyboards/planck/ez/rules.mk b/keyboards/planck/ez/rules.mk
new file mode 100644
index 000000000..c6fb52d2b
--- /dev/null
+++ b/keyboards/planck/ez/rules.mk
@@ -0,0 +1,24 @@
+# project specific files
+LAYOUTS += ortho_4x12
+
+# Cortex version
+MCU  = STM32F303
+
+# Build Options
+#   comment out to disable the options.
+#
+BACKLIGHT_ENABLE = no
+BOOTMAGIC_ENABLE = yes  # Virtual DIP switch configuration
+## (Note that for BOOTMAGIC on Teensy LC you have to use a custom .ld script.)
+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
+#SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+NKRO_ENABLE = yes     # USB Nkey Rollover
+CUSTOM_MATRIX = no # Custom matrix file
+AUDIO_ENABLE = yes
+RGBLIGHT_ENABLE = no
+# SERIAL_LINK_ENABLE = yes
+ENCODER_ENABLE = yes
+RGB_MATRIX_ENABLE = IS31FL3737
diff --git a/keyboards/planck/planck.h b/keyboards/planck/planck.h
index d908d80ec..4bc5e9c3f 100644
--- a/keyboards/planck/planck.h
+++ b/keyboards/planck/planck.h
@@ -5,6 +5,10 @@
 
 #define encoder_update(clockwise) encoder_update_user(uint8_t index, clockwise)
 
+#ifdef KEYBOARD_planck_ez
+  #include "ez.h"
+#endif
+
 #ifdef __AVR__
 #define LAYOUT_planck_mit( \
         k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
@@ -50,7 +54,7 @@
 #define LAYOUT_ortho_4x12 LAYOUT_planck_grid
 #define KC_LAYOUT_ortho_4x12 KC_KEYMAP
 
-#else
+#elif KEYBOARD_planck_rev6
 
         #define LAYOUT_planck_1x2uC( \
     k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
diff --git a/quantum/audio/audio_arm.c b/quantum/audio/audio_arm.c
index 6760015ef..de0cd15c5 100644
--- a/quantum/audio/audio_arm.c
+++ b/quantum/audio/audio_arm.c
@@ -79,7 +79,7 @@ float startup_song[][2] = STARTUP_SONG;
 
 static void gpt_cb8(GPTDriver *gptp);
 
-#define DAC_BUFFER_SIZE 720
+#define DAC_BUFFER_SIZE 100
 #ifndef DAC_SAMPLE_MAX
 #define DAC_SAMPLE_MAX  65535U
 #endif
@@ -98,8 +98,8 @@ static void gpt_cb8(GPTDriver *gptp);
     RESTART_CHANNEL_1()
 #define UPDATE_CHANNEL_2_FREQ(freq) gpt7cfg1.frequency = freq * DAC_BUFFER_SIZE; \
     RESTART_CHANNEL_2()
-#define GET_CHANNEL_1_FREQ gpt6cfg1.frequency
-#define GET_CHANNEL_2_FREQ gpt7cfg1.frequency
+#define GET_CHANNEL_1_FREQ (uint16_t)(gpt6cfg1.frequency * DAC_BUFFER_SIZE)
+#define GET_CHANNEL_2_FREQ (uint16_t)(gpt7cfg1.frequency * DAC_BUFFER_SIZE)
 
 
 /*
diff --git a/quantum/rgb_matrix.h b/quantum/rgb_matrix.h
index 855ea0323..0e193dcb2 100644
--- a/quantum/rgb_matrix.h
+++ b/quantum/rgb_matrix.h
@@ -28,7 +28,9 @@
 #ifdef IS31FL3731
   #include "is31fl3731.h"
 #elif defined (IS31FL3733)
-  #include "is31fl3733.h"
+    #include "is31fl3733.h"
+#elif defined (IS31FL3737)
+    #include "is31fl3737.h"
 #endif
 
 #ifndef RGB_MATRIX_LED_FLUSH_LIMIT
diff --git a/quantum/rgb_matrix_drivers.c b/quantum/rgb_matrix_drivers.c
index 70b80293d..3b7d58483 100644
--- a/quantum/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix_drivers.c
@@ -23,7 +23,7 @@
  * be here if shared between boards.
  */
 
-#if defined(IS31FL3731) || defined(IS31FL3733)
+#if defined(IS31FL3731) || defined(IS31FL3733) || defined(IS31FL3737)
 
 #include "i2c_master.h"
 
@@ -33,23 +33,29 @@ static void init( void )
 #ifdef IS31FL3731
     IS31FL3731_init( DRIVER_ADDR_1 );
     IS31FL3731_init( DRIVER_ADDR_2 );
-#else
+#elif defined(IS31FL3733)
     IS31FL3733_init( DRIVER_ADDR_1 );
+#else
+    IS31FL3737_init( DRIVER_ADDR_1 );
 #endif
     for ( int index = 0; index < DRIVER_LED_TOTAL; index++ ) {
         bool enabled = true;
         // This only caches it for later
 #ifdef IS31FL3731
         IS31FL3731_set_led_control_register( index, enabled, enabled, enabled );
-#else
+#elif defined(IS31FL3733)
         IS31FL3733_set_led_control_register( index, enabled, enabled, enabled );
+#else
+        IS31FL3737_set_led_control_register( index, enabled, enabled, enabled );
 #endif
     }
     // This actually updates the LED drivers
 #ifdef IS31FL3731
     IS31FL3731_update_led_control_registers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
-#else
+#elif defined(IS31FL3733)
     IS31FL3733_update_led_control_registers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
+#else
+    IS31FL3737_update_led_control_registers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
 #endif
 }
 
@@ -65,7 +71,7 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
     .set_color = IS31FL3731_set_color,
     .set_color_all = IS31FL3731_set_color_all,
 };
-#else
+#elif defined(IS31FL3733)
 static void flush( void )
 {
     IS31FL3733_update_pwm_buffers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
@@ -77,6 +83,18 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
     .set_color = IS31FL3733_set_color,
     .set_color_all = IS31FL3733_set_color_all,
 };
+#else
+static void flush( void )
+{
+    IS31FL3737_update_pwm_buffers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
+}
+
+const rgb_matrix_driver_t rgb_matrix_driver = {
+    .init = init,
+    .flush = flush,
+    .set_color = IS31FL3737_set_color,
+    .set_color_all = IS31FL3737_set_color_all,
+};
 #endif
 
 #endif
diff --git a/quantum/stm32/halconf.h b/quantum/stm32/halconf.h
index 8fe8e0c6f..c3e0cbb72 100644
--- a/quantum/stm32/halconf.h
+++ b/quantum/stm32/halconf.h
@@ -76,7 +76,7 @@
  * @brief   Enables the I2C subsystem.
  */
 #if !defined(HAL_USE_I2C) || defined(__DOXYGEN__)
-#define HAL_USE_I2C                 FALSE
+#define HAL_USE_I2C                 TRUE
 #endif
 
 /**
diff --git a/quantum/stm32/mcuconf.h b/quantum/stm32/mcuconf.h
index 7c3c6e570..36f8ca225 100644
--- a/quantum/stm32/mcuconf.h
+++ b/quantum/stm32/mcuconf.h
@@ -154,7 +154,7 @@
 /*
  * I2C driver system settings.
  */
-#define STM32_I2C_USE_I2C1                  FALSE
+#define STM32_I2C_USE_I2C1                  TRUE
 #define STM32_I2C_USE_I2C2                  FALSE
 #define STM32_I2C_BUSY_TIMEOUT              50
 #define STM32_I2C_I2C1_IRQ_PRIORITY         10