Merge branch 'master' of https://github.com/qmk/qmk_firmware

8 files changed, 1595 insertions, 0 deletions

diff --git a/drivers/issi/is31fl3218.c b/drivers/issi/is31fl3218.c
new file mode 100644
index 0000000000..db44f72564
--- /dev/null
+++ b/drivers/issi/is31fl3218.c
@@ -0,0 +1,102 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * 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 "is31fl3218.h"
+#include "i2c_master.h"
+
+// This is the full 8-bit address
+#define ISSI_ADDRESS 0b10101000
+
+// These are the register addresses
+#define ISSI_REG_SHUTDOWN 0x00
+#define ISSI_REG_PWM 0x01
+#define ISSI_REG_CONTROL 0x13
+#define ISSI_REG_UPDATE 0x16
+#define ISSI_REG_RESET 0x17
+
+// Default timeout if no I2C response
+#define ISSI_TIMEOUT 100
+
+// Reusable buffer for transfers
+uint8_t g_twi_transfer_buffer[20];
+
+// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
+// If used as RGB LED driver, LEDs are assigned RGB,RGB,RGB,RGB,RGB,RGB
+uint8_t g_pwm_buffer[18];
+bool g_pwm_buffer_update_required = false;
+
+void IS31FL3218_write_register( uint8_t reg, uint8_t data )
+{
+	g_twi_transfer_buffer[0] = reg;
+	g_twi_transfer_buffer[1] = data;
+	i2c_transmit( ISSI_ADDRESS, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
+}
+
+void IS31FL3218_write_pwm_buffer( uint8_t *pwm_buffer )
+{
+	g_twi_transfer_buffer[0] = ISSI_REG_PWM;
+	for ( int i=0; i<18; i++ ) {
+		g_twi_transfer_buffer[1+i] = pwm_buffer[i];
+	}
+	
+	i2c_transmit( ISSI_ADDRESS, g_twi_transfer_buffer, 19, ISSI_TIMEOUT);
+}
+
+void IS31FL3218_init(void)
+{
+	// In case we ever want to reinitialize (?)
+	IS31FL3218_write_register( ISSI_REG_RESET, 0x00 );
+	
+	// Turn off software shutdown
+	IS31FL3218_write_register( ISSI_REG_SHUTDOWN, 0x01 );
+
+	// Set all PWM values to zero
+	for ( uint8_t i = 0; i < 18; i++ ) {
+		IS31FL3218_write_register( ISSI_REG_PWM+i, 0x00 );
+	}
+	
+	// Enable all channels
+	for ( uint8_t i = 0; i < 3; i++ ) {
+		IS31FL3218_write_register( ISSI_REG_CONTROL+i, 0b00111111 );
+	}
+	
+	// Load PWM registers and LED Control register data
+	IS31FL3218_write_register( ISSI_REG_UPDATE, 0x01 );
+}
+
+void IS31FL3218_set_color( int index, uint8_t red, uint8_t green, uint8_t blue )
+{
+	g_pwm_buffer[index * 3 + 0] = red;
+	g_pwm_buffer[index * 3 + 1] = green;
+	g_pwm_buffer[index * 3 + 2] = blue;
+	g_pwm_buffer_update_required = true;
+}
+
+void IS31FL3218_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
+{
+	for ( int i = 0; i < 6; i++ ) {
+		IS31FL3218_set_color( i, red, green, blue );
+	}
+}
+
+void IS31FL3218_update_pwm_buffers(void)
+{
+	if ( g_pwm_buffer_update_required ) {
+		IS31FL3218_write_pwm_buffer( g_pwm_buffer );
+		// Load PWM registers and LED Control register data
+		IS31FL3218_write_register( ISSI_REG_UPDATE, 0x01 );
+	}
+	g_pwm_buffer_update_required = false;
+}
diff --git a/drivers/issi/is31fl3218.h b/drivers/issi/is31fl3218.h
new file mode 100644
index 0000000000..2d24e51463
--- /dev/null
+++ b/drivers/issi/is31fl3218.h
@@ -0,0 +1,24 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * 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 <stdint.h>
+#include <stdbool.h>
+
+void IS31FL3218_init(void);
+void IS31FL3218_set_color( int index, uint8_t red, uint8_t green, uint8_t blue );
+void IS31FL3218_set_color_all( uint8_t red, uint8_t green, uint8_t blue );
+void IS31FL3218_update_pwm_buffers(void);
diff --git a/drivers/issi/is31fl3731.c b/drivers/issi/is31fl3731.c
new file mode 100644
index 0000000000..c9155f5a37
--- /dev/null
+++ b/drivers/issi/is31fl3731.c
@@ -0,0 +1,270 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ *
+ * 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 "is31fl3731.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "progmem.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:
+// 0b1110100 AD <-> GND
+// 0b1110111 AD <-> VCC
+// 0b1110101 AD <-> SCL
+// 0b1110110 AD <-> SDA
+#define ISSI_ADDR_DEFAULT 0x74
+
+#define ISSI_REG_CONFIG  0x00
+#define ISSI_REG_CONFIG_PICTUREMODE 0x00
+#define ISSI_REG_CONFIG_AUTOPLAYMODE 0x08
+#define ISSI_REG_CONFIG_AUDIOPLAYMODE 0x18
+
+#define ISSI_CONF_PICTUREMODE 0x00
+#define ISSI_CONF_AUTOFRAMEMODE 0x04
+#define ISSI_CONF_AUDIOMODE 0x08
+
+#define ISSI_REG_PICTUREFRAME  0x01
+
+#define ISSI_REG_SHUTDOWN 0x0A
+#define ISSI_REG_AUDIOSYNC 0x06
+
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_BANK_FUNCTIONREG 0x0B    // helpfully called 'page nine'
+
+#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 IS31FL3731 PWM registers 0x24-0xB3.
+// 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 IS31FL3731_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[DRIVER_COUNT][144];
+bool g_pwm_buffer_update_required = false;
+
+uint8_t g_led_control_registers[DRIVER_COUNT][18] = { { 0 }, { 0 } };
+bool g_led_control_registers_update_required = false;
+
+// This is the bit pattern in the LED control registers
+// (for matrix A, add one to register for matrix B)
+//
+//  reg -  b7  b6  b5  b4  b3  b2  b1  b0
+// 0x00 - R08,R07,R06,R05,R04,R03,R02,R01
+// 0x02 - G08,G07,G06,G05,G04,G03,G02,R00
+// 0x04 - B08,B07,B06,B05,B04,B03,G01,G00
+// 0x06 -  - , - , - , - , - ,B02,B01,B00
+// 0x08 -  - , - , - , - , - , - , - , -
+// 0x0A - B17,B16,B15, - , - , - , - , -
+// 0x0C - G17,G16,B14,B13,B12,B11,B10,B09
+// 0x0E - R17,G15,G14,G13,G12,G11,G10,G09
+// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09
+
+
+void IS31FL3731_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 IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer )
+{
+    // assumes bank is already selected
+
+    // transmit PWM registers in 9 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 < 144; i += 16 ) {
+        // set the first register, e.g. 0x24, 0x34, 0x44, etc.
+        g_twi_transfer_buffer[0] = 0x24 + i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x24-0x33, 0x34-0x43, 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 IS31FL3731_init( uint8_t addr )
+{
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, first enable software shutdown,
+    // then set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    // select "function register" bank
+    IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG );
+
+    // enable software shutdown
+    IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x00 );
+    // this delay was copied from other drivers, might not be needed
+    #ifdef __AVR__
+    _delay_ms( 10 );
+    #else
+    wait_ms(10);
+    #endif
+
+    // picture mode
+    IS31FL3731_write_register( addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE );
+    // display frame 0
+    IS31FL3731_write_register( addr, ISSI_REG_PICTUREFRAME, 0x00 );
+    // audio sync off
+    IS31FL3731_write_register( addr, ISSI_REG_AUDIOSYNC, 0x00 );
+
+    // select bank 0
+    IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 );
+
+    // turn off all LEDs in the LED control register
+    for ( int i = 0x00; i <= 0x11; i++ )
+    {
+        IS31FL3731_write_register( addr, i, 0x00 );
+    }
+
+    // turn off all LEDs in the blink control register (not really needed)
+    for ( int i = 0x12; i <= 0x23; i++ )
+    {
+        IS31FL3731_write_register( addr, i, 0x00 );
+    }
+
+    // set PWM on all LEDs to 0
+    for ( int i = 0x24; i <= 0xB3; i++ )
+    {
+        IS31FL3731_write_register( addr, i, 0x00 );
+    }
+
+    // select "function register" bank
+    IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG );
+
+    // disable software shutdown
+    IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x01 );
+
+    // select bank 0 and leave it selected.
+    // most usage after initialization is just writing PWM buffers in bank 0
+    // as there's not much point in double-buffering
+    IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 );
+
+}
+
+void IS31FL3731_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];
+
+        // Subtract 0x24 to get the second index of g_pwm_buffer
+        g_pwm_buffer[led.driver][led.r - 0x24] = red;
+        g_pwm_buffer[led.driver][led.g - 0x24] = green;
+        g_pwm_buffer[led.driver][led.b - 0x24] = blue;
+        g_pwm_buffer_update_required = true;
+    }
+}
+
+void IS31FL3731_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
+{
+    for ( int i = 0; i < DRIVER_LED_TOTAL; i++ )
+    {
+        IS31FL3731_set_color( i, red, green, blue );
+    }
+}
+
+void IS31FL3731_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 - 0x24) / 8;
+  uint8_t control_register_g = (led.g - 0x24) / 8;
+  uint8_t control_register_b = (led.b - 0x24) / 8;
+  uint8_t bit_r = (led.r - 0x24) % 8;
+  uint8_t bit_g = (led.g - 0x24) % 8;
+  uint8_t bit_b = (led.b - 0x24) % 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 IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 )
+{
+    if ( g_pwm_buffer_update_required )
+    {
+        IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] );
+        IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] );
+    }
+    g_pwm_buffer_update_required = false;
+}
+
+void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 )
+{
+    if ( g_led_control_registers_update_required )
+    {
+        for ( int i=0; i<18; i++ )
+        {
+            IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] );
+            IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] );
+        }
+    }
+}
diff --git a/drivers/issi/is31fl3731.h b/drivers/issi/is31fl3731.h
new file mode 100644
index 0000000000..f354a12db2
--- /dev/null
+++ b/drivers/issi/is31fl3731.h
@@ -0,0 +1,214 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ *
+ * 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 IS31FL3731_DRIVER_H
+#define IS31FL3731_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 IS31FL3731_init( uint8_t addr );
+void IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data );
+void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer );
+
+void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue );
+void IS31FL3731_set_color_all( uint8_t red, uint8_t green, uint8_t blue );
+
+void IS31FL3731_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 IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 );
+void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 );
+
+#define C1_1  0x24
+#define C1_2  0x25
+#define C1_3  0x26
+#define C1_4  0x27
+#define C1_5  0x28
+#define C1_6  0x29
+#define C1_7  0x2A
+#define C1_8  0x2B
+
+#define C1_9  0x2C
+#define C1_10 0x2D
+#define C1_11 0x2E
+#define C1_12 0x2F
+#define C1_13 0x30
+#define C1_14 0x31
+#define C1_15 0x32
+#define C1_16 0x33
+
+#define C2_1  0x34
+#define C2_2  0x35
+#define C2_3  0x36
+#define C2_4  0x37
+#define C2_5  0x38
+#define C2_6  0x39
+#define C2_7  0x3A
+#define C2_8  0x3B
+
+#define C2_9  0x3C
+#define C2_10 0x3D
+#define C2_11 0x3E
+#define C2_12 0x3F
+#define C2_13 0x40
+#define C2_14 0x41
+#define C2_15 0x42
+#define C2_16 0x43
+
+#define C3_1  0x44
+#define C3_2  0x45
+#define C3_3  0x46
+#define C3_4  0x47
+#define C3_5  0x48
+#define C3_6  0x49
+#define C3_7  0x4A
+#define C3_8  0x4B
+
+#define C3_9  0x4C
+#define C3_10 0x4D
+#define C3_11 0x4E
+#define C3_12 0x4F
+#define C3_13 0x50
+#define C3_14 0x51
+#define C3_15 0x52
+#define C3_16 0x53
+
+#define C4_1  0x54
+#define C4_2  0x55
+#define C4_3  0x56
+#define C4_4  0x57
+#define C4_5  0x58
+#define C4_6  0x59
+#define C4_7  0x5A
+#define C4_8  0x5B
+
+#define C4_9  0x5C
+#define C4_10 0x5D
+#define C4_11 0x5E
+#define C4_12 0x5F
+#define C4_13 0x60
+#define C4_14 0x61
+#define C4_15 0x62
+#define C4_16 0x63
+
+#define C5_1  0x64
+#define C5_2  0x65
+#define C5_3  0x66
+#define C5_4  0x67
+#define C5_5  0x68
+#define C5_6  0x69
+#define C5_7  0x6A
+#define C5_8  0x6B
+
+#define C5_9  0x6C
+#define C5_10 0x6D
+#define C5_11 0x6E
+#define C5_12 0x6F
+#define C5_13 0x70
+#define C5_14 0x71
+#define C5_15 0x72
+#define C5_16 0x73
+
+#define C6_1  0x74
+#define C6_2  0x75
+#define C6_3  0x76
+#define C6_4  0x77
+#define C6_5  0x78
+#define C6_6  0x79
+#define C6_7  0x7A
+#define C6_8  0x7B
+
+#define C6_9  0x7C
+#define C6_10 0x7D
+#define C6_11 0x7E
+#define C6_12 0x7F
+#define C6_13 0x80
+#define C6_14 0x81
+#define C6_15 0x82
+#define C6_16 0x83
+
+#define C7_1  0x84
+#define C7_2  0x85
+#define C7_3  0x86
+#define C7_4  0x87
+#define C7_5  0x88
+#define C7_6  0x89
+#define C7_7  0x8A
+#define C7_8  0x8B
+
+#define C7_9  0x8C
+#define C7_10 0x8D
+#define C7_11 0x8E
+#define C7_12 0x8F
+#define C7_13 0x90
+#define C7_14 0x91
+#define C7_15 0x92
+#define C7_16 0x93
+
+#define C8_1  0x94
+#define C8_2  0x95
+#define C8_3  0x96
+#define C8_4  0x97
+#define C8_5  0x98
+#define C8_6  0x99
+#define C8_7  0x9A
+#define C8_8  0x9B
+
+#define C8_9  0x9C
+#define C8_10 0x9D
+#define C8_11 0x9E
+#define C8_12 0x9F
+#define C8_13 0xA0
+#define C8_14 0xA1
+#define C8_15 0xA2
+#define C8_16 0xA3
+
+#define C9_1  0xA4
+#define C9_2  0xA5
+#define C9_3  0xA6
+#define C9_4  0xA7
+#define C9_5  0xA8
+#define C9_6  0xA9
+#define C9_7  0xAA
+#define C9_8  0xAB
+
+#define C9_9  0xAC
+#define C9_10 0xAD
+#define C9_11 0xAE
+#define C9_12 0xAF
+#define C9_13 0xB0
+#define C9_14 0xB1
+#define C9_15 0xB2
+#define C9_16 0xB3
+
+
+
+#endif // IS31FL3731_DRIVER_H
diff --git a/drivers/issi/is31fl3733.c b/drivers/issi/is31fl3733.c
new file mode 100644
index 0000000000..c198ec5174
--- /dev/null
+++ b/drivers/issi/is31fl3733.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 IS31FL3733 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 IS31FL3733_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 }, { 0 } };
+bool g_led_control_registers_update_required = false;
+
+void IS31FL3733_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 IS31FL3733_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 IS31FL3733_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.
+    IS31FL3733_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG0
+    IS31FL3733_write_register( addr, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL );
+    // Turn off all LEDs.
+    for ( int i = 0x00; i <= 0x17; i++ )
+    {
+        IS31FL3733_write_register( addr, i, 0x00 );
+    }
+
+    // Unlock the command register.
+    IS31FL3733_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG1
+    IS31FL3733_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++ )
+    {
+        IS31FL3733_write_register( addr, i, 0x00 );
+    }
+
+    // Unlock the command register.
+    IS31FL3733_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG3
+    IS31FL3733_write_register( addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION );
+    // Set global current to maximum.
+    IS31FL3733_write_register( addr, ISSI_REG_GLOBALCURRENT, 0xFF );
+    // Disable software shutdown.
+    IS31FL3733_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 IS31FL3733_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 IS31FL3733_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
+{
+    for ( int i = 0; i < DRIVER_LED_TOTAL; i++ )
+    {
+        IS31FL3733_set_color( i, red, green, blue );
+    }
+}
+
+void IS31FL3733_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 IS31FL3733_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
+        IS31FL3733_write_register( addr1, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+        IS31FL3733_write_register( addr1, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM );
+
+        IS31FL3733_write_pwm_buffer( addr1, g_pwm_buffer[0] );
+        //IS31FL3733_write_pwm_buffer( addr2, g_pwm_buffer[1] );
+    }
+    g_pwm_buffer_update_required = false;
+}
+
+void IS31FL3733_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
+        IS31FL3733_write_register( addr1, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+        IS31FL3733_write_register( addr1, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL );
+        for ( int i=0; i<24; i++ )
+        {
+            IS31FL3733_write_register(addr1, i, g_led_control_registers[0][i] );
+            //IS31FL3733_write_register(addr2, i, g_led_control_registers[1][i] );
+        }
+    }
+}
diff --git a/drivers/issi/is31fl3733.h b/drivers/issi/is31fl3733.h
new file mode 100644
index 0000000000..3d23b188aa
--- /dev/null
+++ b/drivers/issi/is31fl3733.h
@@ -0,0 +1,255 @@
+/* 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 IS31FL3733_DRIVER_H
+#define IS31FL3733_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 IS31FL3733_init( uint8_t addr );
+void IS31FL3733_write_register( uint8_t addr, uint8_t reg, uint8_t data );
+void IS31FL3733_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer );
+
+void IS31FL3733_set_color( int index, uint8_t red, uint8_t green, uint8_t blue );
+void IS31FL3733_set_color_all( uint8_t red, uint8_t green, uint8_t blue );
+
+void IS31FL3733_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 IS31FL3733_update_pwm_buffers( uint8_t addr1, uint8_t addr2 );
+void IS31FL3733_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  0x06
+#define A_8  0x07
+#define A_9  0x08
+#define A_10  0x09
+#define A_11  0x0A
+#define A_12  0x0B
+#define A_13  0x0C
+#define A_14  0x0D
+#define A_15  0x0E
+#define A_16  0x0F
+
+#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  0x16
+#define B_8  0x17
+#define B_9  0x18
+#define B_10  0x19
+#define B_11  0x1A
+#define B_12  0x1B
+#define B_13  0x1C
+#define B_14  0x1D
+#define B_15  0x1E
+#define B_16  0x1F
+
+#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  0x26
+#define C_8  0x27
+#define C_9  0x28
+#define C_10  0x29
+#define C_11  0x2A
+#define C_12  0x2B
+#define C_13  0x2C
+#define C_14  0x2D
+#define C_15  0x2E
+#define C_16  0x2F
+
+#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  0x36
+#define D_8  0x37
+#define D_9  0x38
+#define D_10  0x39
+#define D_11  0x3A
+#define D_12  0x3B
+#define D_13  0x3C
+#define D_14  0x3D
+#define D_15  0x3E
+#define D_16  0x3F
+
+#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  0x46
+#define E_8  0x47
+#define E_9  0x48
+#define E_10  0x49
+#define E_11  0x4A
+#define E_12  0x4B
+#define E_13  0x4C
+#define E_14  0x4D
+#define E_15  0x4E
+#define E_16  0x4F
+
+#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  0x56
+#define F_8  0x57
+#define F_9  0x58
+#define F_10  0x59
+#define F_11  0x5A
+#define F_12  0x5B
+#define F_13  0x5C
+#define F_14  0x5D
+#define F_15  0x5E
+#define F_16  0x5F
+
+#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  0x66
+#define G_8  0x67
+#define G_9  0x68
+#define G_10  0x69
+#define G_11  0x6A
+#define G_12  0x6B
+#define G_13  0x6C
+#define G_14  0x6D
+#define G_15  0x6E
+#define G_16  0x6F
+
+#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  0x76
+#define H_8  0x77
+#define H_9  0x78
+#define H_10  0x79
+#define H_11  0x7A
+#define H_12  0x7B
+#define H_13  0x7C
+#define H_14  0x7D
+#define H_15  0x7E
+#define H_16  0x7F
+
+#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  0x86
+#define I_8  0x87
+#define I_9  0x88
+#define I_10  0x89
+#define I_11  0x8A
+#define I_12  0x8B
+#define I_13  0x8C
+#define I_14  0x8D
+#define I_15  0x8E
+#define I_16  0x8F
+
+#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  0x96
+#define J_8  0x97
+#define J_9  0x98
+#define J_10  0x99
+#define J_11  0x9A
+#define J_12  0x9B
+#define J_13  0x9C
+#define J_14  0x9D
+#define J_15  0x9E
+#define J_16  0x9F
+
+#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  0xA6
+#define K_8  0xA7
+#define K_9  0xA8
+#define K_10  0xA9
+#define K_11  0xAA
+#define K_12  0xAB
+#define K_13  0xAC
+#define K_14  0xAD
+#define K_15  0xAE
+#define K_16  0xAF
+
+#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  0xB6
+#define L_8  0xB7
+#define L_9  0xB8
+#define L_10  0xB9
+#define L_11  0xBA
+#define L_12  0xBB
+#define L_13  0xBC
+#define L_14  0xBD
+#define L_15  0xBE
+#define L_16  0xBF
+
+#endif // IS31FL3733_DRIVER_H
diff --git a/drivers/issi/is31fl3736.c b/drivers/issi/is31fl3736.c
new file mode 100644
index 0000000000..c5d4310971
--- /dev/null
+++ b/drivers/issi/is31fl3736.c
@@ -0,0 +1,306 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * 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 "is31fl3736.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "progmem.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 IS31FL3736 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 IS31FL3736_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 }, { 0 } };
+bool g_led_control_registers_update_required = false;
+
+void IS31FL3736_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 IS31FL3736_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 IS31FL3736_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.
+    IS31FL3736_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG0
+    IS31FL3736_write_register( addr, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL );
+    // Turn off all LEDs.
+    for ( int i = 0x00; i <= 0x17; i++ )
+    {
+        IS31FL3736_write_register( addr, i, 0x00 );
+    }
+
+    // Unlock the command register.
+    IS31FL3736_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG1
+    IS31FL3736_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++ )
+    {
+        IS31FL3736_write_register( addr, i, 0x00 );
+    }
+
+    // Unlock the command register.
+    IS31FL3736_write_register( addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+
+    // Select PG3
+    IS31FL3736_write_register( addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION );
+    // Set global current to maximum.
+    IS31FL3736_write_register( addr, ISSI_REG_GLOBALCURRENT, 0xFF );
+    // Disable software shutdown.
+    IS31FL3736_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 IS31FL3736_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 IS31FL3736_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
+{
+    for ( int i = 0; i < DRIVER_LED_TOTAL; i++ )
+    {
+        IS31FL3736_set_color( i, red, green, blue );
+    }
+}
+
+void IS31FL3736_set_led_control_register( uint8_t index, bool red, bool green, bool blue )
+{
+    is31_led led = g_is31_leds[index];
+
+    // IS31FL3733
+    // The PWM register for a matrix position (0x00 to 0xBF) can be
+    // divided by 8 to get the LED control register (0x00 to 0x17),
+    // then mod 8 to get the bit position within that register.
+
+    // IS31FL3736
+    // The PWM register for a matrix position (0x00 to 0xBF) is interleaved, so:
+    // A1=0x00 A2=0x02 A3=0x04 A4=0x06 A5=0x08 A6=0x0A A7=0x0C A8=0x0E
+    // B1=0x10 B2=0x12 B3=0x14
+    // But also, the LED control registers (0x00 to 0x17) are also interleaved, so:
+    // A1-A4=0x00 A5-A8=0x01
+    // So, the same math applies.
+
+	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 IS31FL3736_mono_set_brightness( int index, uint8_t value )
+{
+    if ( index >= 0 && index < 96 ) {
+    	// Index in range 0..95 -> A1..A8, B1..B8, etc.
+    	// Map index 0..95 to registers 0x00..0xBE (interleaved)
+    	uint8_t pwm_register = index * 2;
+        g_pwm_buffer[0][pwm_register] = value;
+        g_pwm_buffer_update_required = true;
+    }
+}
+
+void IS31FL3736_mono_set_brightness_all( uint8_t value )
+{
+    for ( int i = 0; i < 96; i++ )
+    {
+    	IS31FL3736_mono_set_brightness( i, value );
+    }
+}
+
+void IS31FL3736_mono_set_led_control_register( uint8_t index, bool enabled )
+{
+	// Index in range 0..95 -> A1..A8, B1..B8, etc.
+
+	// Map index 0..95 to registers 0x00..0xBE (interleaved)
+	uint8_t pwm_register = index * 2;
+	// Map register 0x00..0xBE (interleaved) into control register and bit
+	uint8_t control_register = pwm_register / 8;
+	uint8_t bit = pwm_register % 8;
+
+    if ( enabled ) {
+        g_led_control_registers[0][control_register] |= (1 << bit);
+    } else {
+        g_led_control_registers[0][control_register] &= ~(1 << bit);
+    }
+
+    g_led_control_registers_update_required = true;
+}
+
+void IS31FL3736_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
+        IS31FL3736_write_register( addr1, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+        IS31FL3736_write_register( addr1, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM );
+
+        IS31FL3736_write_pwm_buffer( addr1, g_pwm_buffer[0] );
+        //IS31FL3736_write_pwm_buffer( addr2, g_pwm_buffer[1] );
+    }
+    g_pwm_buffer_update_required = false;
+}
+
+void IS31FL3736_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
+        IS31FL3736_write_register( addr1, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5 );
+        IS31FL3736_write_register( addr1, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL );
+        for ( int i=0; i<24; i++ )
+        {
+            IS31FL3736_write_register(addr1, i, g_led_control_registers[0][i] );
+            //IS31FL3736_write_register(addr2, i, g_led_control_registers[1][i] );
+        }
+    }
+}
+
diff --git a/drivers/issi/is31fl3736.h b/drivers/issi/is31fl3736.h
new file mode 100644
index 0000000000..cff50fd0d8
--- /dev/null
+++ b/drivers/issi/is31fl3736.h
@@ -0,0 +1,172 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * 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 <stdint.h>
+#include <stdbool.h>
+
+
+// Simple interface option.
+// If these aren't defined, just define them to make it compile
+
+
+#ifndef DRIVER_COUNT
+#define DRIVER_COUNT 2
+#endif
+
+#ifndef DRIVER_LED_TOTAL
+#define DRIVER_LED_TOTAL 96
+#endif
+
+
+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 IS31FL3736_init( uint8_t addr );
+void IS31FL3736_write_register( uint8_t addr, uint8_t reg, uint8_t data );
+void IS31FL3736_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer );
+
+void IS31FL3736_set_color( int index, uint8_t red, uint8_t green, uint8_t blue );
+void IS31FL3736_set_color_all( uint8_t red, uint8_t green, uint8_t blue );
+
+void IS31FL3736_set_led_control_register( uint8_t index, bool red, bool green, bool blue );
+
+void IS31FL3736_mono_set_brightness( int index, uint8_t value );
+void IS31FL3736_mono_set_brightness_all( uint8_t value );
+void IS31FL3736_mono_set_led_control_register( uint8_t index, bool enabled );
+
+// 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 IS31FL3736_update_pwm_buffers( uint8_t addr1, uint8_t addr2 );
+void IS31FL3736_update_led_control_registers( uint8_t addr1, uint8_t addr2 );
+
+#define A_1  0x00
+#define A_2  0x02
+#define A_3  0x04
+#define A_4  0x06
+#define A_5  0x08
+#define A_6  0x0A
+#define A_7  0x0C
+#define A_8  0x0E
+
+#define B_1  0x10
+#define B_2  0x12
+#define B_3  0x14
+#define B_4  0x16
+#define B_5  0x18
+#define B_6  0x1A
+#define B_7  0x1C
+#define B_8  0x1E
+
+#define C_1  0x20
+#define C_2  0x22
+#define C_3  0x24
+#define C_4  0x26
+#define C_5  0x28
+#define C_6  0x2A
+#define C_7  0x2C
+#define C_8  0x2E
+
+#define D_1  0x30
+#define D_2  0x32
+#define D_3  0x34
+#define D_4  0x36
+#define D_5  0x38
+#define D_6  0x3A
+#define D_7  0x3C
+#define D_8  0x3E
+
+#define E_1  0x40
+#define E_2  0x42
+#define E_3  0x44
+#define E_4  0x46
+#define E_5  0x48
+#define E_6  0x4A
+#define E_7  0x4C
+#define E_8  0x4E
+
+#define F_1  0x50
+#define F_2  0x52
+#define F_3  0x54
+#define F_4  0x56
+#define F_5  0x58
+#define F_6  0x5A
+#define F_7  0x5C
+#define F_8  0x5E
+
+#define G_1  0x60
+#define G_2  0x62
+#define G_3  0x64
+#define G_4  0x66
+#define G_5  0x68
+#define G_6  0x6A
+#define G_7  0x6C
+#define G_8  0x6E
+
+#define H_1  0x70
+#define H_2  0x72
+#define H_3  0x74
+#define H_4  0x76
+#define H_5  0x78
+#define H_6  0x7A
+#define H_7  0x7C
+#define H_8  0x7E
+
+#define I_1  0x80
+#define I_2  0x82
+#define I_3  0x84
+#define I_4  0x86
+#define I_5  0x88
+#define I_6  0x8A
+#define I_7  0x8C
+#define I_8  0x8E
+
+#define J_1  0x90
+#define J_2  0x92
+#define J_3  0x94
+#define J_4  0x96
+#define J_5  0x98
+#define J_6  0x9A
+#define J_7  0x9C
+#define J_8  0x9E
+
+#define K_1  0xA0
+#define K_2  0xA2
+#define K_3  0xA4
+#define K_4  0xA6
+#define K_5  0xA8
+#define K_6  0xAA
+#define K_7  0xAC
+#define K_8  0xAE
+
+#define L_1  0xB0
+#define L_2  0xB2
+#define L_3  0xB4
+#define L_4  0xB6
+#define L_5  0xB8
+#define L_6  0xBA
+#define L_7  0xBC
+#define L_8  0xBE
+