/* Copyright 2017 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/>.
 */
#if RGB_BACKLIGHT_ENABLED

#if defined(RGB_BACKLIGHT_ZEAL60) || defined(RGB_BACKLIGHT_ZEAL65) || defined(RGB_BACKLIGHT_M60_A) || defined(RGB_BACKLIGHT_M6_B) || defined(RGB_BACKLIGHT_KOYU) || defined(RGB_BACKLIGHT_HS60) || defined(RGB_BACKLIGHT_NK65)
#else
#error None of the following was defined: RGB_BACKLIGHT_ZEAL60, RGB_BACKLIGHT_ZEAL65, RGB_BACKLIGHT_M60_A, RGB_BACKLIGHT_M6_B, RGB_BACKLIGHT_KOYU, RGB_BACKLIGHT_HS60, RGB_BACKLIGHT_NK65
#endif

#ifndef MAX
    #define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
#endif

#ifndef MIN
    #define MIN(a,b) ((a) < (b)? (a): (b))
#endif

#include "quantum.h"
#include "rgb_backlight.h"
#include "rgb_backlight_api.h"
#include "rgb_backlight_keycodes.h"

#if !defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65)
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include "drivers/avr/i2c_master.h"
#else
#include "ch.h"
#include "hal.h"
#include "drivers/arm/i2c_master.h"
#include "tmk_core/common/eeprom.h"
#endif
#include "progmem.h"
#include "quantum/color.h"

#if defined(RGB_BACKLIGHT_M6_B)
#include "drivers/issi/is31fl3218.h"
#define BACKLIGHT_LED_COUNT 6
#elif defined(RGB_BACKLIGHT_HS60)
#include "drivers/issi/is31fl3733.h"
#define BACKLIGHT_LED_COUNT 64
#elif defined(RGB_BACKLIGHT_NK65)
#include "drivers/issi/is31fl3733.h"
#define BACKLIGHT_LED_COUNT 69
#else
#include "drivers/issi/is31fl3731.h"
#define BACKLIGHT_LED_COUNT 72
#endif

#define BACKLIGHT_EFFECT_MAX 10

backlight_config g_config = {
    .use_split_backspace = RGB_BACKLIGHT_USE_SPLIT_BACKSPACE,
    .use_split_left_shift = RGB_BACKLIGHT_USE_SPLIT_LEFT_SHIFT,
    .use_split_right_shift = RGB_BACKLIGHT_USE_SPLIT_RIGHT_SHIFT,
    .use_7u_spacebar = RGB_BACKLIGHT_USE_7U_SPACEBAR,
    .use_iso_enter = RGB_BACKLIGHT_USE_ISO_ENTER,
    .disable_hhkb_blocker_leds = RGB_BACKLIGHT_DISABLE_HHKB_BLOCKER_LEDS,
    .disable_when_usb_suspended = RGB_BACKLIGHT_DISABLE_WHEN_USB_SUSPENDED,
    .disable_after_timeout = RGB_BACKLIGHT_DISABLE_AFTER_TIMEOUT,
    .brightness = RGB_BACKLIGHT_BRIGHTNESS,
    .effect = RGB_BACKLIGHT_EFFECT,
    .effect_speed = RGB_BACKLIGHT_EFFECT_SPEED,
    .color_1 = RGB_BACKLIGHT_COLOR_1,
    .color_2 = RGB_BACKLIGHT_COLOR_2,
    .caps_lock_indicator = RGB_BACKLIGHT_CAPS_LOCK_INDICATOR,
    .layer_1_indicator = RGB_BACKLIGHT_LAYER_1_INDICATOR,
    .layer_2_indicator = RGB_BACKLIGHT_LAYER_2_INDICATOR,
    .layer_3_indicator = RGB_BACKLIGHT_LAYER_3_INDICATOR,
    .alphas_mods = {
        RGB_BACKLIGHT_ALPHAS_MODS_ROW_0,
        RGB_BACKLIGHT_ALPHAS_MODS_ROW_1,
        RGB_BACKLIGHT_ALPHAS_MODS_ROW_2,
        RGB_BACKLIGHT_ALPHAS_MODS_ROW_3,
        RGB_BACKLIGHT_ALPHAS_MODS_ROW_4 },
#if defined(RGB_BACKLIGHT_M6_B)
    .custom_color = { { 0, 255 }, { 43, 255 }, { 85, 255 }, { 128, 255 }, { 171, 255 }, { 213, 255 } }
#endif
};

bool g_suspend_state = false;
uint8_t g_indicator_state = 0;

// Global tick at 20 Hz
uint32_t g_tick = 0;

// Ticks since this key was last hit.
uint8_t g_key_hit[BACKLIGHT_LED_COUNT];

// Ticks since any key was last hit.
uint32_t g_any_key_hit = 0;

#if defined(RGB_BACKLIGHT_HS60)

// 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)
// ADDR_2 is not needed. it is here as a dummy
#define ISSI_ADDR_1 0x50

const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
/* Refer to IS31 manual for these locations
 *   driver
 *   |  R location
 *   |  |      G location
 *   |  |      |      B location
 *   |  |      |      | */
    {0, B_1,   A_1,   C_1}, //LA1
    {0, E_1,   D_1,   F_1}, //LA2
    {0, H_1,   G_1,   I_1}, //LA3
    {0, K_1,   J_1,   L_1}, //LA4
    {0, B_2,   A_2,   C_2}, //LA5
    {0, E_2,   D_2,   F_2}, //LA6
    {0, H_2,   G_2,   I_2}, //LA7
    {0, K_2,   J_2,   L_2}, //LA8
    {0, B_3,   A_3,   C_3}, //LA9
    {0, E_3,   D_3,   F_3}, //LA10
    {0, H_3,   G_3,   I_3}, //LA11
    {0, K_3,   J_3,   L_3}, //LA12
    {0, B_4,   A_4,   C_4}, //LA13
    {0, E_4,   D_4,   F_4}, //LA14
    {0, H_4,   G_4,   I_4}, //LA15
    {0, K_4,   J_4,   L_4}, //LA16
    {0, B_5,   A_5,   C_5}, //LA17
    {0, E_5,   D_5,   F_5}, //LA18
    {0, H_5,   G_5,   I_5}, //LA19
    {0, K_5,   J_5,   L_5}, //LA20
    {0, B_6,   A_6,   C_6}, //LA21
    {0, E_6,   D_6,   F_6}, //LA22
    {0, H_6,   G_6,   I_6}, //LA23
    {0, K_6,   J_6,   L_6}, //LA24
    {0, B_7,   A_7,   C_7}, //LA25
    {0, E_7,   D_7,   F_7}, //LA26
    {0, H_7,   G_7,   I_7}, //LA27
    {0, K_7,   J_7,   L_7}, //LA28
    {0, B_8,   A_8,   C_8}, //LA29
    {0, E_8,   D_8,   F_8}, //LA30
    {0, H_8,   G_8,   I_8}, //LA31
    {0, K_8,   J_8,   L_8}, //LA32
    {0, B_9,   A_9,   C_9}, //LA33
    {0, E_9,   D_9,   F_9}, //LA34
    {0, H_9,   G_9,   I_9}, //LA35
    {0, K_9,   J_9,   L_9}, //LA36
    {0, B_10,  A_10,  C_10}, //LA37
    {0, E_10,  D_10,  F_10}, //LA38
    {0, H_10,  G_10,  I_10}, //LA39
    {0, K_10,  J_10,  L_10}, //LA40
    {0, B_11,  A_11,  C_11}, //LA41
    {0, E_11,  D_11,  F_11}, //LA42
    {0, H_11,  G_11,  I_11}, //LA43
    {0, K_11,  J_11,  L_11}, //LA44
    {0, B_12,  A_12,  C_12}, //LA45
    {0, E_12,  D_12,  F_12}, //LA46
    {0, H_12,  G_12,  I_12}, //LA47
    {0, K_12,  J_12,  L_12}, //LA48
    {0, B_13,  A_13,  C_13}, //LA49
    {0, E_13,  D_13,  F_13}, //LA50
    {0, H_13,  G_13,  I_13}, //LA51
    {0, K_13,  J_13,  L_13}, //LA52
    {0, B_14,  A_14,  C_14}, //LA53
    {0, E_14,  D_14,  F_14}, //LA54
    {0, H_14,  G_14,  I_14}, //LA55
    {0, K_14,  J_14,  L_14}, //LA56
    {0, B_15,  A_15,  C_15}, //LA57
    {0, E_15,  D_15,  F_15}, //LA58
    {0, H_15,  G_15,  I_15}, //LA59
    {0, K_15,  J_15,  L_15}, //LA60
    {0, B_16,  A_16,  C_16}, //LA61
    {0, E_16,  D_16,  F_16}, //LA62
    {0, H_16,  G_16,  I_16}, //LA63
    {0, K_16,  J_16,  L_16}, //LA64
};

#elif defined(RGB_BACKLIGHT_NK65)

// 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)
// ADDR_2 is not needed. it is here as a dummy
#define ISSI_ADDR_1 0x50
#define ISSI_ADDR_2 0x52

const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
/* Refer to IS31 manual for these locations
 *   driver
 *   |  R location
 *   |  |      G location
 *   |  |      |      B location
 *   |  |      |      | */
    {0, B_1,   A_1,   C_1}, //LA1
    {0, E_1,   D_1,   F_1}, //LA2
    {0, H_1,   G_1,   I_1}, //LA3
    {0, K_1,   J_1,   L_1}, //LA4
    {0, B_2,   A_2,   C_2}, //LA5
    {0, E_2,   D_2,   F_2}, //LA6
    {0, H_2,   G_2,   I_2}, //LA7
    {0, K_2,   J_2,   L_2}, //LA8
    {0, B_3,   A_3,   C_3}, //LA9
    {0, E_3,   D_3,   F_3}, //LA10
    {0, H_3,   G_3,   I_3}, //LA11
    {0, K_3,   J_3,   L_3}, //LA12
    {0, B_4,   A_4,   C_4}, //LA13
    {0, E_4,   D_4,   F_4}, //LA14
    {0, H_4,   G_4,   I_4}, //LA15
    {0, K_4,   J_4,   L_4}, //LA16
    {0, B_5,   A_5,   C_5}, //LA17
    {0, E_5,   D_5,   F_5}, //LA18
    {0, H_5,   G_5,   I_5}, //LA19
    {0, K_5,   J_5,   L_5}, //LA20
    {0, B_6,   A_6,   C_6}, //LA21
    {0, E_6,   D_6,   F_6}, //LA22
    {0, H_6,   G_6,   I_6}, //LA23
    {0, K_6,   J_6,   L_6}, //LA24
    {0, B_7,   A_7,   C_7}, //LA25
    {0, E_7,   D_7,   F_7}, //LA26
    {0, H_7,   G_7,   I_7}, //LA27
    {0, K_7,   J_7,   L_7}, //LA28
    {0, B_8,   A_8,   C_8}, //LA29
    {0, E_8,   D_8,   F_8}, //LA30
    {0, H_8,   G_8,   I_8}, //LA31
    {0, K_8,   J_8,   L_8}, //LA32
    {0, B_9,   A_9,   C_9}, //LA33
    {0, E_9,   D_9,   F_9}, //LA34
    {0, H_9,   G_9,   I_9}, //LA35
    {0, K_9,   J_9,   L_9}, //LA36
    {0, B_10,  A_10,  C_10}, //LA37
    {0, E_10,  D_10,  F_10}, //LA38
    {0, H_10,  G_10,  I_10}, //LA39
    {0, K_10,  J_10,  L_10}, //LA40
    {0, B_11,  A_11,  C_11}, //LA41
    {0, E_11,  D_11,  F_11}, //LA42
    {0, H_11,  G_11,  I_11}, //LA43
    {0, K_11,  J_11,  L_11}, //LA44
    {0, B_12,  A_12,  C_12}, //LA45
    {0, E_12,  D_12,  F_12}, //LA46
    {0, H_12,  G_12,  I_12}, //LA47
    {0, K_12,  J_12,  L_12}, //LA48
    {0, B_13,  A_13,  C_13}, //LA49
    {0, E_13,  D_13,  F_13}, //LA50
    {0, H_13,  G_13,  I_13}, //LA51
    {0, K_13,  J_13,  L_13}, //LA52
    {0, B_14,  A_14,  C_14}, //LA53
    {0, E_14,  D_14,  F_14}, //LA54
    {0, H_14,  G_14,  I_14}, //LA55
    {0, K_14,  J_14,  L_14}, //LA56
    {0, B_15,  A_15,  C_15}, //LA57
    {0, E_15,  D_15,  F_15}, //LA58
    {0, H_15,  G_15,  I_15}, //LA59
    {0, K_15,  J_15,  L_15}, //LA60
    {0, B_16,  A_16,  C_16}, //LA61
    {0, E_16,  D_16,  F_16}, //LA62
    {0, H_16,  G_16,  I_16}, //LA63
    {0, K_16,  J_16,  L_16}, //LA64

    {1, B_1,   A_1,   C_1}, //LB1
    {1, E_1,   D_1,   F_1}, //LB2
    {1, H_1,   G_1,   I_1}, //LB3
    {1, K_1,   J_1,   L_1}, //LB4
    {1, B_2,   A_2,   C_2}, //LB5
    {1, E_2,   D_2,   F_2}, //LB6
    {1, H_2,   G_2,   I_2}, //LB7
    {1, K_2,   J_2,   L_2}, //LB8
    {1, B_3,   A_3,   C_3}, //LB9
    {1, E_3,   D_3,   F_3}, //LB10
    {1, H_3,   G_3,   I_3}, //LB11
    {1, K_3,   J_3,   L_3}, //LB12
    {1, B_4,   A_4,   C_4}, //LB13
    {1, E_4,   D_4,   F_4}, //LB14
    {1, H_4,   G_4,   I_4}, //LB15
    {1, K_4,   J_4,   L_4}, //LB16
    {1, B_5,   A_5,   C_5}, //LB17
    {1, E_5,   D_5,   F_5}, //LB18
    {1, H_5,   G_5,   I_5}, //LB19
    {1, K_5,   J_5,   L_5}, //LB20
    {1, B_6,   A_6,   C_6}, //LB21
    {1, E_6,   D_6,   F_6}, //LB22
    {1, H_6,   G_6,   I_6}, //LB23
    {1, K_6,   J_6,   L_6}, //LB24
    {1, B_7,   A_7,   C_7}, //LB25
    {1, E_7,   D_7,   F_7}, //LB26
    {1, H_7,   G_7,   I_7}, //LB27
    {1, K_7,   J_7,   L_7}, //LB28
    {1, B_8,   A_8,   C_8}, //LB29
    {1, E_8,   D_8,   F_8}, //LB30
    {1, H_8,   G_8,   I_8}, //LB31
    {1, K_8,   J_8,   L_8}, //LB32
    {1, B_9,   A_9,   C_9}, //LB33
    {1, E_9,   D_9,   F_9}, //LB34
    {1, H_9,   G_9,   I_9}, //LB35
    {1, K_9,   J_9,   L_9}, //LB36
    {1, B_10,  A_10,  C_10}, //LB37
    {1, E_10,  D_10,  F_10}, //LB38
    {1, H_10,  G_10,  I_10}, //LB39
    {1, K_10,  J_10,  L_10}, //LB40
    {1, B_11,  A_11,  C_11}, //LB41
    {1, E_11,  D_11,  F_11}, //LB42
    {1, H_11,  G_11,  I_11}, //LB43
    {1, K_11,  J_11,  L_11}, //LB44
    {1, B_12,  A_12,  C_12}, //LB45
    {1, E_12,  D_12,  F_12}, //LB46
    {1, H_12,  G_12,  I_12}, //LB47
    {1, K_12,  J_12,  L_12}, //LB48
    {1, B_13,  A_13,  C_13}, //LB49
    {1, E_13,  D_13,  F_13}, //LB50
    {1, H_13,  G_13,  I_13}, //LB51
    {1, K_13,  J_13,  L_13}, //LB52
    {1, B_14,  A_14,  C_14}, //LB53
    {1, E_14,  D_14,  F_14}, //LB54
    {1, H_14,  G_14,  I_14}, //LB55
    {1, K_14,  J_14,  L_14}, //LB56
    {1, B_15,  A_15,  C_15}, //LB57
    {1, E_15,  D_15,  F_15}, //LB58
    {1, H_15,  G_15,  I_15}, //LB59
    {1, K_15,  J_15,  L_15}, //LB60
    {1, B_16,  A_16,  C_16}, //LB61
    {1, E_16,  D_16,  F_16}, //LB62
    {1, H_16,  G_16,  I_16}, //LB63
    {1, K_16,  J_16,  L_16}, //LB64
};

#elif !defined(RGB_BACKLIGHT_M6_B)
// 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)
#define ISSI_ADDR_1 0x74
#define ISSI_ADDR_2 0x76

const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
/* Refer to IS31 manual for these locations
 *   driver
 *   |  R location
 *   |  |      G location
 *   |  |      |      B location
 *   |  |      |      | */
    {0, C2_1,  C3_1,  C4_1},  // LA0
    {0, C1_1,  C3_2, C4_2},   // LA1
    {0, C1_2,  C2_2, C4_3},   // LA2
    {0, C1_3,  C2_3, C3_3},   // LA3
    {0, C1_4,  C2_4, C3_4},   // LA4
    {0, C1_5,  C2_5, C3_5},   // LA5
    {0, C1_6,  C2_6, C3_6},   // LA6
    {0, C1_7,  C2_7, C3_7},   // LA7
    {0, C1_8,  C2_8, C3_8},   // LA8
    {0, C9_1,  C8_1, C7_1},   // LA9
    {0, C9_2,  C8_2, C7_2},   // LA10
    {0, C9_3,  C8_3, C7_3},   // LA11
    {0, C9_4,  C8_4, C7_4},   // LA12
    {0, C9_5,  C8_5, C7_5},   // LA13
    {0, C9_6,  C8_6, C7_6},   // LA14
    {0, C9_7,  C8_7, C6_6},   // LA15
    {0, C9_8,  C7_7, C6_7},   // LA16
    {0, C8_8,  C7_8, C6_8},   // LA17

    {0, C2_9,  C3_9,  C4_9},  // LB0
    {0, C1_9,  C3_10, C4_10}, // LB1
    {0, C1_10, C2_10, C4_11}, // LB2
    {0, C1_11, C2_11, C3_11}, // LB3
    {0, C1_12, C2_12, C3_12}, // LB4
    {0, C1_13, C2_13, C3_13}, // LB5
    {0, C1_14, C2_14, C3_14}, // LB6
    {0, C1_15, C2_15, C3_15}, // LB7
    {0, C1_16, C2_16, C3_16}, // LB8
    {0, C9_9,  C8_9,  C7_9},  // LB9
    {0, C9_10, C8_10, C7_10}, // LB10
    {0, C9_11, C8_11, C7_11}, // LB11
    {0, C9_12, C8_12, C7_12}, // LB12
    {0, C9_13, C8_13, C7_13}, // LB13
    {0, C9_14, C8_14, C7_14}, // LB14
    {0, C9_15, C8_15, C6_14}, // LB15
    {0, C9_16, C7_15, C6_15}, // LB16
    {0, C8_16, C7_16, C6_16}, // LB17

    {1, C2_1,  C3_1,  C4_1},  // LC0
    {1, C1_1,  C3_2, C4_2},   // LC1
    {1, C1_2,  C2_2, C4_3},   // LC2
    {1, C1_3,  C2_3, C3_3},   // LC3
    {1, C1_4,  C2_4, C3_4},   // LC4
    {1, C1_5,  C2_5, C3_5},   // LC5
    {1, C1_6,  C2_6, C3_6},   // LC6
    {1, C1_7,  C2_7, C3_7},   // LC7
    {1, C1_8,  C2_8, C3_8},   // LC8
    {1, C9_1,  C8_1,  C7_1},  // LC9
    {1, C9_2,  C8_2, C7_2},   // LC10
    {1, C9_3,  C8_3, C7_3},   // LC11
    {1, C9_4,  C8_4, C7_4},   // LC12
    {1, C9_5,  C8_5, C7_5},   // LC13
    {1, C9_6,  C8_6, C7_6},   // LC14
    {1, C9_7,  C8_7, C6_6},   // LC15
    {1, C9_8,  C7_7, C6_7},   // LC16
    {1, C8_8,  C7_8, C6_8},   // LC17

    {1, C2_9,  C3_9,  C4_9},  // LD0
    {1, C1_9,  C3_10, C4_10}, // LD1
    {1, C1_10, C2_10, C4_11}, // LD2
    {1, C1_11, C2_11, C3_11}, // LD3
    {1, C1_12, C2_12, C3_12}, // LD4
    {1, C1_13, C2_13, C3_13}, // LD5
    {1, C1_14, C2_14, C3_14}, // LD6
    {1, C1_15, C2_15, C3_15}, // LD7
    {1, C1_16, C2_16, C3_16}, // LD8
    {1, C9_9,  C8_9,  C7_9},  // LD9
    {1, C9_10, C8_10, C7_10}, // LD10
    {1, C9_11, C8_11, C7_11}, // LD11
    {1, C9_12, C8_12, C7_12}, // LD12
    {1, C9_13, C8_13, C7_13}, // LD13
    {1, C9_14, C8_14, C7_14}, // LD14
    {1, C9_15, C8_15, C6_14}, // LD15
    {1, C9_16, C7_15, C6_15}, // LD16
    {1, C8_16, C7_16, C6_16}, // LD17
};
#endif // !defined(RGB_BACKLIGHT_M6_B)


typedef struct Point {
    uint8_t x;
    uint8_t y;
} Point;


// index in range 0..71 (LA0..LA17, LB0..LB17, LC0..LC17, LD0..LD17)
// point values in range x=0..224 y=0..64
// origin is center of top-left key (i.e Esc)
#if defined(RGB_BACKLIGHT_ZEAL65)
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA0..LA17
    {120,16}, {104,16}, {88,16}, {72,16}, {56,16}, {40,16}, {24,16}, {4,16}, {4,32},
    {128,0}, {112,0}, {96,0}, {80,0}, {64,0}, {48,0}, {32,0}, {16,0}, {0,0},
    // LB0..LB17
    {144,0}, {160,0}, {176,0}, {192,0}, {216,0}, {224,0}, {240,0}, {240,16}, {240,32},
    {136,16}, {152,16}, {168,16}, {184,16}, {200,16}, {220,16}, {240,48}, {240,64}, {224,64},
    // LC0..LC17
    {96,64}, {100,48}, {84,48}, {68,48}, {52,48}, {36,48}, {255,255}, {48,60}, {28,64},
    {108,32}, {92,32}, {76,32}, {60,32}, {44,32}, {28,32}, {20,44}, {10,48}, {4,64},
    // LD0..LD17
    {124,32}, {140,32}, {156,32}, {172,32}, {188,32}, {214,32}, {180,48}, {202,48}, {224,48},
    {116,48}, {132,48}, {148,48}, {164,48}, {255,255}, {144,60}, {164,64}, {188,64}, {208,64}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA0..LA17
    {64,128}, {75,132}, {84,145}, {91,164}, {97,187}, {102,213}, {105,242}, {109,255}, {128,243},
    {61,255}, {67,255}, {72,255}, {77,255}, {82,255}, {86,255}, {90,255}, {93,255}, {96,255},
    // LB0..LB17
    {56,255}, {51,255}, {46,255}, {42,255}, {37,255}, {35,255}, {32,255}, {19,255}, {0,255},
    {53,132}, {44,145}, {37,164}, {31,187}, {26,213}, {22,249}, {237,255}, {224,255}, {221,255},
    // LC0..LC17
    {184,255}, {179,135}, {170,149}, {163,169}, {157,193}, {153,220}, {255,255}, {167,255}, {165,255},
    {128,26}, {128,60}, {128,94}, {128,128}, {128,162}, {128,196}, {145,233}, {148,255}, {161,255},
    // LD0..LD17
    {0,9}, {0,43}, {0,77}, {0,111}, {0,145}, {0,201}, {224,181}, {230,217}, {235,255},
    {189,128}, {200,131}, {210,141}, {218,159}, {255,255}, {201,228}, {206,255}, {213,255}, {218,255}
};
#elif defined(RGB_BACKLIGHT_KOYU)
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA0..LA17
    {120,16}, {104,16}, {88,16}, {72,16}, {56,16}, {40,16}, {24,16}, {4,16}, {4,32},
    {128,0}, {112,0}, {96,0}, {80,0}, {64,0}, {48,0}, {32,0}, {16,0}, {0,0},
    // LB0..LB17
    {144,0}, {160,0}, {176,0}, {192,0}, {208,0}, {224,0}, {240,0}, {240,16}, {240,32},
    {136,16}, {152,16}, {168,16}, {184,16}, {200,16}, {220,16}, {240,48}, {240,64}, {224,64},
    // LC0..LC17
    {112,64}, {100,48}, {84,48}, {68,48}, {52,48}, {36,48}, {64,60}, {44,60}, {24,64},
    {108,32}, {92,32}, {76,32}, {60,32}, {44,32}, {28,32}, {255,255}, {10,48}, {4,64},
    // LD0..LD17
    {124,32}, {140,32}, {156,32}, {172,32}, {188,32}, {214,32}, {180,48}, {202,48}, {224,48},
    {116,48}, {132,48}, {148,48}, {164,48}, {255,255}, {160,60}, {180,64}, {208,64}, {255,255}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA0..LA17
    {64,128}, {75,132}, {84,145}, {91,164}, {97,187}, {102,213}, {105,242}, {109,255}, {128,243},
    {61,255}, {67,255}, {72,255}, {77,255}, {82,255}, {86,255}, {90,255}, {93,255}, {96,255},
    // LB0..LB17
    {56,255}, {51,255}, {46,255}, {42,255}, {38,255}, {35,255}, {32,255}, {19,255}, {0,255},
    {53,132}, {44,145}, {37,164}, {31,187}, {26,213}, {22,249}, {237,255}, {224,255}, {221,255},
    // LC0..LC17
    {189,255}, {179,135}, {170,149}, {163,169}, {157,193}, {153,220}, {172,252}, {169,255}, {165,255},
    {128,26}, {128,60}, {128,94}, {128,128}, {128,162}, {128,196}, {255,255}, {148,255}, {161,255},
    // LD0..LD17
    {0,9}, {0,43}, {0,77}, {0,111}, {0,145}, {0,201}, {224,181}, {230,217}, {235,255},
    {189,128}, {200,131}, {210,141}, {218,159}, {255,255}, {207,238}, {211,255}, {218,255}, {255,255}
};
#elif defined(RGB_BACKLIGHT_ZEAL60) || defined(RGB_BACKLIGHT_M60_A)
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA0..LA17
    {120,16}, {104,16}, {88,16}, {72,16}, {56,16}, {40,16}, {24,16}, {4,16}, {4,32},
    {128,0}, {112,0}, {96,0}, {80,0}, {64,0}, {48,0}, {32,0}, {16,0}, {0,0},
    // LB0..LB17
    {144,0}, {160,0}, {176,0}, {192,0}, {216,0}, {224,0}, {255,255}, {255,255}, {255,255},
    {136,16}, {152,16}, {168,16}, {184,16}, {200,16}, {220,16}, {255,255}, {255,255}, {255,255},
    // LC0..LC17
    {102,64}, {100,48}, {84,48}, {68,48}, {52,48}, {36,48}, {60,64}, {43,64}, {23,64},
    {108,32}, {92,32}, {76,32}, {60,32}, {44,32}, {28,32}, {20,48}, {2,48}, {3,64},
    // LD0..LD17
    {124,32}, {140,32}, {156,32}, {172,32}, {188,32}, {214,32}, {180,48}, {210,48}, {224,48},
    {116,48}, {132,48}, {148,48}, {164,48}, {144,64}, {161,64}, {181,64}, {201,64}, {221,64}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA0..LA17
    {58,129}, {70,129}, {80,139}, {89,157}, {96,181}, {101,208}, {105,238}, {109,255}, {128,247}, {58,255},
    {64,255}, {70,255}, {75,255}, {80,255}, {85,255}, {89,255}, {93,255}, {96,255},
    // LB0..LB17
    {53,255}, {48,255}, {43,255}, {39,255}, {34,255}, {32,255}, {255,255}, {255,255}, {255,255},
    {48,139}, {39,157}, {32,181}, {27,208}, {23,238}, {19,255}, {255,255}, {255,255}, {255,255},
    // LC0..LC17
    {188,255}, {183,131}, {173,143}, {165,163}, {159,188}, {154,216}, {172,252}, {170,255}, {165,255},
    {128,9}, {128,46}, {128,82}, {128,119}, {128,155}, {128,192}, {150,244}, {147,255}, {161,255},
    // LD0..LD17
    {0,27}, {0,64}, {0,101}, {0,137}, {0,174}, {255,233}, {228,201}, {235,255}, {237,255},
    {195,128}, {206,136}, {215,152}, {222,175}, {205,234}, {209,255}, {214,255}, {219,255}, {223,255}
};
#elif defined(RGB_BACKLIGHT_HS60) && defined(HS60_ANSI)
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA47
    {0,0}, {4,16}, {6,32}, {10,48}, {16,0}, {24,16}, {28,32}, {36,48}, {32,0}, {40,16}, {44,32}, {52,48},
    {48,0}, {56,16}, {60,32}, {68,48}, {64,0}, {72,16}, {76,32}, {84,48}, {80,0}, {88,16}, {92,32}, {100,48},
    {96,0}, {104,16}, {108,32}, {116,48}, {112,0}, {120,16}, {124,32}, {132,48}, {128,0}, {136,16}, {140,32},
    {148,48}, {144,0}, {152,16}, {156,32}, {164,48}, {160,0}, {168,16}, {172,32}, {180,48}, {176,0}, {184, 16}, {188,32},
    {255,255},// LA48 does not exist, dummy
    // LA49..LA50
    {192,0}, {200,16},
    {255,255},// LA51 does not exit, dummy
    // LA52..LA60
    {210,48}, {216,0}, {220,16}, {214,32}, {222,64}, {2,64}, {22,64}, {42,64}, {102,64},
    {255,255},// LA61 does not exit, dummy
    {162,64}, {182,64}, {202,64}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA47
    {96,255}, {109,255}, {128,242}, {148,255}, {93,255}, {105,238}, {128,192}, {154,216}, {89,255}, {101,208}, {128,155}, {159,188},
    {85,255}, {96,181}, {128,119}, {165,163}, {81,255}, {89,157}, {128,82}, {173,143}, {75,255}, {81,139}, {128,46}, {183,131},
    {70,255}, {70,129}, {129,9}, {195,128}, {64,255}, {58,129}, {255,27}, {206,136}, {58,255}, {47,139}, {255,64}, {215,152},
    {53,255}, {39,157}, {255,101}, {222,175}, {47,255}, {32,181}, {255,137}, {228,201}, {43,255}, {27,208}, {255, 174},
    {255,255},// LA48 does not exist, dummy
    // LA49..LA50
    {39,255}, {23,238},
    {255,255},// LA51 does not exit, dummy
    // LA52..LA60
    {235,255}, {33,255}, {19,255}, {255,233}, {224,255}, {160,255}, {164,255}, {169,255}, {188,255},
    {255,255},// LA61 does not exit, dummy
    {209,255}, {215,255}, {220,255}
};
#elif defined(RGB_BACKLIGHT_HS60) && defined(HS60_HHKB)
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA60
    {0,0}, {4,16}, {6,32}, {10,48}, {16,0}, {24,16}, {28,32}, {36,48}, {32,0}, {40,16}, {44,32}, {52,48},
    {48,0}, {56,16}, {60,32}, {68,48}, {64,0}, {72,16}, {76,32}, {84,48}, {80,0}, {88,16}, {92,32}, {100,48},
    {96,0}, {104,16}, {108,32}, {116,48}, {112,0}, {120,16}, {124,32}, {132,48}, {128,0}, {136,16}, {140,32},
    {148,48}, {144,0}, {152,16}, {156,32}, {164,48}, {160,0}, {168,16}, {172,32}, {180,48}, {176,0}, {184, 16}, {188,32},
    {224,0}, {192,0}, {200,16}, {202,48}, {224,48}, {208,0}, {220,16}, {214,32}, {220,64}, {4,64}, {24,64}, {44,64}, {112,64},
    {255,255}, {255,255}, // LA61..LA62 does not exit, dummy
    // LA63..LA64
    {180,64}, {200,64}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA60
    {96,255}, {109,255}, {128,242}, {148,255}, {93,255}, {105,238}, {128,192}, {154,216}, {89,255}, {101,208}, {128,155}, {159,188},
    {85,255}, {96,181}, {128,119}, {165,163}, {81,255}, {89,157}, {128,82}, {173,143}, {75,255}, {81,139}, {128,46}, {183,131},
    {70,255}, {70,129}, {129,9}, {195,128}, {64,255}, {58,129}, {255,27}, {206,136}, {58,255}, {47,139}, {255,64}, {215,152},
    {53,255}, {39,157}, {255,101}, {222,175}, {47,255}, {32,181}, {255,137}, {228,201}, {43,255}, {27,208}, {255, 174}, {32,255},
    {39,255}, {23,238}, {233,242}, {237,255}, {35,255}, {19,255}, {255,233}, {223,255}, {161,255}, {165,255}, {170,255}, {192,255},
    {255,255}, {255,255}, // LA61..LA62 does not exit, dummy
    // LA63..LA64
    {214,255}, {219,255}
};
#elif defined(RGB_BACKLIGHT_HS60) //HS60_ISO
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA50
    {0,0}, {4,16}, {6,32}, {2,48}, {16,0}, {24,16}, {28,32}, {36,48}, {32,0}, {40,16}, {44,32}, {52,48}, {48,0},
    {56,16}, {60,32}, {68,48}, {64,0}, {72,16}, {76,32}, {84,48}, {80,0}, {88,16}, {92,32}, {100,48}, {96,0}, {104,16}, 
    {108,32}, {116,48}, {112,0}, {120,16}, {124,32}, {132,48}, {128,0}, {136,16}, {140,32}, {148,48}, {144,0}, {152,16},
    {156,32}, {164,48}, {160,0}, {168,16}, {172,32}, {180,48}, {176,0}, {184, 16}, {188,32}, {20,48}, {192,0}, {200,16},
    {255,255},// LA51 does not exit, dummy
    // LA52..LA60
    {210,48}, {216,0}, {220,16}, {222,24}, {222,64}, {2,64}, {22,64}, {42,64}, {102,64},
    {255,255},// LA61 does not exit, dummy
    {162,64}, {182,64}, {202,64}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA50
    {96,255}, {109,255}, {128,242}, {147,255}, {93,255}, {105,238}, {128,192}, {154,216}, {89,255}, {101,208}, {128,155}, {159,188}, {85,255},
    {96,181}, {128,119}, {165,163}, {81,255}, {89,157}, {128,82}, {173,143}, {75,255}, {81,139}, {128,46}, {183,131}, {70,255}, {70,129},
    {129,9}, {195,128}, {64,255}, {58,129}, {255,27}, {206,136}, {58,255}, {47,139}, {255,64}, {215,152}, {53,255}, {39,157}, {255,101}, 
    {222,175}, {47,255}, {32,181}, {255,137}, {228,201}, {43,255}, {27,208}, {255, 174}, {150,246}, {39,255}, {23,238},
    {255,255},// LA51 does not exit, dummy
    // LA52..LA60
    {235,255}, {33,255}, {19,255}, {10,255}, {224,255}, {160,255}, {164,255}, {169,255}, {188,255},
    {255,255},// LA61 does not exit, dummy
    {209,255}, {215,255}, {220,255}
};
#elif defined(RGB_BACKLIGHT_NK65)
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA60
    {0,0}, {4,16}, {6,32}, {10,48}, {16,0}, {24,16}, {28,32}, {36,48}, {32,0}, {40,16}, {44,32}, {52,48},
    {48,0}, {56,16}, {60,32}, {68,48}, {64,0}, {72,16}, {76,32}, {84,48}, {80,0}, {88,16}, {92,32}, {100,48},
    {96,0}, {104,16}, {108,32}, {116,48}, {112,0}, {120,16}, {124,32}, {132,48}, {128,0}, {136,16}, {140,32},
    {148,48}, {144,0}, {152,16}, {156,32}, {164,48}, {160,0}, {168,16}, {172,32}, {180,48}, {176,0}, {184, 16}, {188,32},
    {160,64}, {192,0}, {200,16}, {210,48}, {224,48}, {216,0}, {220,16}, {214,32}, {224,64}, {2,64}, {22,64}, {42,64}, {102,64},
    {255,255},// LA61 does not exit, dummy
    //LA62..LB5
    {176,64}, {192,64}, {208,64}, {240,0}, {240,16}, {240,48}, {240,64}, {240,32}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    // LA1..LA60
    {96,255}, {109,255}, {128,242}, {148,255}, {93,255}, {105,238}, {128,192}, {154,216}, {89,255}, {101,208}, {128,155}, {159,188},
    {85,255}, {96,181}, {128,119}, {165,163}, {81,255}, {89,157}, {128,82}, {173,143}, {75,255}, {81,139}, {128,46}, {183,131},
    {70,255}, {70,129}, {129,9}, {195,128}, {64,255}, {58,129}, {255,27}, {206,136}, {58,255}, {47,139}, {255,64}, {215,152},
    {53,255}, {39,157}, {255,101}, {222,175}, {47,255}, {32,181}, {255,137}, {228,201}, {43,255}, {27,208}, {255, 174},
    {208,255}, {39,255}, {23,238}, {235,255}, {235,255}, {33,255}, {19,255}, {255,233}, {224,255}, {160,255}, {164,255}, {169,255}, {188,255},
    {255,255},// LA61 does not exit, dummy
    //LA62..LB5
    {221,255}, {225,255}, {229,255}, {22,255}, {12,255}, {244,255}, {234,255}, {255,255},
};
#elif defined(RGB_BACKLIGHT_M6_B)
// M6-B is really simple:
// 0 3 5
// 1 2 4
const Point g_map_led_to_point[BACKLIGHT_LED_COUNT] PROGMEM = {
    {0,0}, {0,16}, {16,16}, {16,0}, {32,16}, {32,0}
};
const Point g_map_led_to_point_polar[BACKLIGHT_LED_COUNT] PROGMEM = {
    {160,255}, {96,255}, {77,255}, {179,255}, {51,255}, {205,255}
};
#endif

// This may seem counter-intuitive, but it's quite flexible.
// For each LED, get it's position to decide what color to make it.
// This solves the issue of LEDs (and switches) not aligning to a grid,
// or having a large "bitmap" and sampling them.
void map_led_to_point( uint8_t index, Point *point )
{
    // Slightly messy way to get Point structs out of progmem.
    uint8_t *addr = (uint8_t*)&g_map_led_to_point[index];
    point->x = pgm_read_byte(addr);
    point->y = pgm_read_byte(addr+1);

#if defined(RGB_BACKLIGHT_M6_B) || defined(RGB_BACKLIGHT_HS60) || defined(RGB_BACKLIGHT_NK65)
    return;
#endif

    switch (index)
    {
        case 18+4: // LB4A
            if ( g_config.use_split_backspace )
                point->x -= 8;
            break;
#if defined(RGB_BACKLIGHT_ZEAL60)
        case 18+14: // LB14A
            if ( g_config.use_iso_enter )
                point->y += 8; // extremely pedantic
            break;
        case 54+5: // LD5A
            if ( !g_config.use_iso_enter )
                point->x -= 10;
            break;
        case 36+16: // LC16A
            if ( !g_config.use_split_left_shift )
                point->x += 8;
            break;
#endif
#if defined(RGB_BACKLIGHT_ZEAL60) || defined(RGB_BACKLIGHT_M60_A)
        case 36+0: // LC0A
            if ( g_config.use_7u_spacebar )
                point->x += 10;
            break;
        case 36+6: // LC6A
            if ( g_config.use_7u_spacebar )
                point->x += 4;
            break;
        case 54+7: // LD7A
            if ( !g_config.use_split_right_shift )
                point->x -= 8;
            break;
#endif
    }
}

void map_led_to_point_polar( uint8_t index, Point *point )
{
    // Slightly messy way to get Point structs out of progmem.
    uint8_t *addr = (uint8_t*)&g_map_led_to_point_polar[index];
    point->x = pgm_read_byte(addr);
    point->y = pgm_read_byte(addr+1);
}

//
// Maps switch matrix coordinate (row,col) to LED index
//


#if defined(RGB_BACKLIGHT_ZEAL65)
// Note: Left spacebar stab is at 4,2 (LC7)
// Right spacebar stab is at 4,9 (D14)
//
// A17, A16, A15, A14, A13, A12, A11, A10,  A9,  B0,  B1,  B2,  B3,  B4,  B6
//  A7,  A6,  A5,  A4,  A3,  A2,  A1,  A0,  B9, B10, B11, B12, B13, B14,  B7
//  A8, C14, C13, C12, C11, C10,  C9,  D0,  D1,  D2,  D3,  D4,  D5,  B5,  B8
// C16, C15,  C5,  C4,  C3,  C2,  C1,  D9, D10, D11, D12,  D6,  D7,  D8, B15
// C17,  C8,  C7, ---, ---, ---, ---,  C0, ---, D14, D15, D16, D17, B17, B16
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {  0+17,  0+16,  0+15,  0+14,  0+13,  0+12,  0+11,  0+10,   0+9,  18+0,  18+1,  18+2,  18+3,  18+4,  18+6 },
    {   0+7,   0+6,   0+5,   0+4,   0+3,   0+2,   0+1,   0+0,  18+9, 18+10, 18+11, 18+12, 18+13, 18+14,  18+7 },
    {   0+8, 36+14, 36+13, 36+12, 36+11, 36+10,  36+9,  54+0,  54+1,  54+2,  54+3,  54+4,  54+5,  18+5,  18+8 },
    { 36+16, 36+15,  36+5,  36+4,  36+3,  36+2,  36+1,  54+9, 54+10, 54+11, 54+12,  54+6,  54+7,  54+8, 18+15 },
    { 36+17,  36+8,  36+7,   255,   255,   255,   255,  36+0,  255,  54+14, 54+15, 54+16, 54+17, 18+17, 18+16 }
};
#elif defined(RGB_BACKLIGHT_KOYU)
// Note: Left spacebar stab is at 4,4 (LC6)
// Right spacebar stab is at 4,10 (D14)
//
// A17, A16, A15, A14, A13, A12, A11, A10,  A9,  B0,  B1,  B2,  B3,  B4,  B6
//  A7,  A6,  A5,  A4,  A3,  A2,  A1,  A0,  B9, B10, B11, B12, B13, B14,  B7
//  A8, C14, C13, C12, C11, C10,  C9,  D0,  D1,  D2,  D3,  D4,  D5,  B5,  B8
// C16, C15,  C5,  C4,  C3,  C2,  C1,  D9, D10, D11, D12,  D6,  D7,  D8, B15
// C17,  C8,  C7,  C6, ---, ---, ---,  C0, ---, ---, D14, D15, D16, B17, B16
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {  0+17,  0+16,  0+15,  0+14,  0+13,  0+12,  0+11,  0+10,   0+9,  18+0,  18+1,  18+2,  18+3,  18+4,  18+6 },
    {   0+7,   0+6,   0+5,   0+4,   0+3,   0+2,   0+1,   0+0,  18+9, 18+10, 18+11, 18+12, 18+13, 18+14,  18+7 },
    {   0+8, 36+14, 36+13, 36+12, 36+11, 36+10,  36+9,  54+0,  54+1,  54+2,  54+3,  54+4,  54+5,  18+5,  18+8 },
    { 36+16, 36+15,  36+5,  36+4,  36+3,  36+2,  36+1,  54+9, 54+10, 54+11, 54+12,  54+6,  54+7,  54+8, 18+15 },
    { 36+17,  36+8,  36+7,  36+6,   255,   255,   255,  36+0,  255,    255, 54+14, 54+15, 54+16, 18+17, 18+16 }
};
#elif defined(RGB_BACKLIGHT_ZEAL60) || defined(RGB_BACKLIGHT_M60_A)
// Note: Left spacebar stab is at 4,3 (LC6)
// Right spacebar stab is at 4,9 (LD13) or 4,10 (LD14)
//
// A17, A16, A15, A14, A13, A12, A11, A10,  A9,  B0,  B1,  B2,  B3,  B4,
//  A7,  A6,  A5,  A4,  A3,  A2,  A1,  A0,  B9, B10, B11, B12, B13, B14,
//  A8, C14, C13, C12, C11, C10,  C9,  D0,  D1,  D2,  D3,  D4,  D5,  B5,
// C16, C15,  C5,  C4,  C3,  C2,  C1,  D9, D10, D11, D12,  D6,  D7,  D8,
// C17,  C8,  C7,  C6, ---, ---, ---,  C0, ---, D13, D14, D15, D16, D17,
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {  0+17,  0+16,  0+15,  0+14,  0+13,  0+12,  0+11,  0+10,   0+9,  18+0,  18+1,  18+2,  18+3,  18+4 },
    {   0+7,   0+6,   0+5,   0+4,   0+3,   0+2,   0+1,   0+0,  18+9, 18+10, 18+11, 18+12, 18+13, 18+14 },
    {   0+8, 36+14, 36+13, 36+12, 36+11, 36+10,  36+9,  54+0,  54+1,  54+2,  54+3,  54+4,  54+5,  18+5 },
    { 36+16, 36+15,  36+5,  36+4,  36+3,  36+2,  36+1,  54+9, 54+10, 54+11, 54+12,  54+6,  54+7,  54+8 },
    { 36+17,  36+8,  36+7,  36+6,   255,   255,   255,  36+0,  255,  54+13, 54+14, 54+15, 54+16, 54+17 }
};
#elif defined(RGB_BACKLIGHT_HS60) && defined(HS60_ANSI)
//
// LA1,  LA5,  LA9,  LA13, LA17, LA21, LA25, LA29, LA33, LA37, LA41, LA45, LA49, LA53,
// LA2,  LA6,  LA10, LA14, LA18, LA22, LA26, LA30, LA34, LA38, LA42, LA46, LA50,  ---,
// LA3,  LA7,  LA11, LA15, LA19, LA23, LA27, LA31, LA35, LA39, LA43, LA47, LA54, LA55,
// LA4,  ---,   LA8, LA12, LA16, LA20, LA24, LA28, LA32, LA36, LA40, LA44,  ---, LA52,
// LA57, LA58, LA59,  ---,  ---,  ---, LA60,  ---,  ---,  ---, LA62, LA63, LA64, LA56
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {  1-1,  5-1,  9-1, 13-1, 17-1, 21-1, 25-1, 29-1, 33-1, 37-1, 41-1, 45-1, 49-1, 53-1 },
    {  2-1,  6-1, 10-1, 14-1, 18-1, 22-1, 26-1, 30-1, 34-1, 38-1, 42-1, 46-1, 50-1,  255 },
    {  3-1,  7-1, 11-1, 15-1, 19-1, 23-1, 27-1, 31-1, 35-1, 39-1, 43-1, 47-1, 54-1, 55-1 },
    {  4-1,  255,  8-1, 12-1, 16-1, 20-1, 24-1, 28-1, 32-1, 36-1, 40-1, 44-1,  255, 52-1 },
    { 57-1, 58-1, 59-1,  255,  255,  255, 60-1,  255,  255,  255, 62-1, 63-1, 64-1, 56-1 }
};
#elif defined(RGB_BACKLIGHT_HS60) && defined(HS60_HHKB)
//
// LA1,  LA5,   LA9, LA13, LA17, LA21, LA25, LA29, LA33, LA37, LA41, LA45, LA49, LA53,
// LA2,  LA6,  LA10, LA14, LA18, LA22, LA26, LA30, LA34, LA38, LA42, LA46, LA50, LA48,
// LA3,  LA7,  LA11, LA15, LA19, LA23, LA27, LA31, LA35, LA39, LA43, LA47, LA54, LA55,
// LA4,  ---,   LA8, LA12, LA16, LA20, LA24, LA28, LA32, LA36, LA40, LA44, LA51, LA52,
// LA57, LA58, LA59,  ---,  ---,  ---, LA60,  ---,  ---,  ---,  ---, LA63, LA64, LA56
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {  1-1,  5-1,  9-1, 13-1, 17-1, 21-1, 25-1, 29-1, 33-1, 37-1, 41-1, 45-1, 49-1, 53-1 },
    {  2-1,  6-1, 10-1, 14-1, 18-1, 22-1, 26-1, 30-1, 34-1, 38-1, 42-1, 46-1, 50-1, 48-1 },
    {  3-1,  7-1, 11-1, 15-1, 19-1, 23-1, 27-1, 31-1, 35-1, 39-1, 43-1, 47-1, 54-1, 55-1 },
    {  4-1,  255,  8-1, 12-1, 16-1, 20-1, 24-1, 28-1, 32-1, 36-1, 40-1, 44-1, 51-1, 52-1 },
    { 57-1, 58-1, 59-1,  255,  255,  255, 60-1,  255,  255,  255,  255, 63-1, 64-1, 56-1 }
};
#elif defined(RGB_BACKLIGHT_HS60) //HS60_ISO
//
// LA1,  LA5,   LA9, LA13, LA17, LA21, LA25, LA29, LA33, LA37, LA41, LA45, LA49, LA53,
// LA2,  LA6,  LA10, LA14, LA18, LA22, LA26, LA30, LA34, LA38, LA42, LA46, LA50,  ---,
// LA3,  LA7,  LA11, LA15, LA19, LA23, LA27, LA31, LA35, LA39, LA43, LA47, LA54, LA55,
// LA4,  LA48,  LA8, LA12, LA16, LA20, LA24, LA28, LA32, LA36, LA40, LA44,  ---, LA52,
// LA57, LA58, LA59,  ---,  ---,  ---, LA60,  ---,  ---,  ---, LA62, LA63, LA64, LA56
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {  1-1,  5-1,  9-1, 13-1, 17-1, 21-1, 25-1, 29-1, 33-1, 37-1, 41-1, 45-1, 49-1, 53-1 },
    {  2-1,  6-1, 10-1, 14-1, 18-1, 22-1, 26-1, 30-1, 34-1, 38-1, 42-1, 46-1, 50-1,  255 },
    {  3-1,  7-1, 11-1, 15-1, 19-1, 23-1, 27-1, 31-1, 35-1, 39-1, 43-1, 47-1, 54-1, 55-1 },
    {  4-1, 48-1,  8-1, 12-1, 16-1, 20-1, 24-1, 28-1, 32-1, 36-1, 40-1, 44-1,  255, 52-1 },
    { 57-1, 58-1, 59-1,  255,  255,  255, 60-1,  255,  255,  255, 62-1, 63-1, 64-1, 56-1 }
};
#elif defined(RGB_BACKLIGHT_NK65)
//
// LA1,  LA5,  LA9,  LA13, LA17, LA21, LA25, LA29, LA33, LA37, LA41, LA45, LA49, LA53, LB1,
// LA2,  LA6,  LA10, LA14, LA18, LA22, LA26, LA30, LA34, LA38, LA42, LA46, LA50,  ---, LB2,
// LA3,  LA7,  LA11, LA15, LA19, LA23, LA27, LA31, LA35, LA39, LA43, LA47, LA54, LA55, LB5,
// LA4,  ---,   LA8, LA12, LA16, LA20, LA24, LA28, LA32, LA36, LA40, LA44, LA51, LA52, LB3,
// LA57, LA58, LA59,  ---,  ---,  ---, LA60,  ---,  ---, LA48, LA62, LA63, LA64, LA56, LB4
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {  1-1,  5-1,  9-1, 13-1, 17-1, 21-1, 25-1, 29-1, 33-1, 37-1, 41-1, 45-1, 49-1, 53-1, 1+64-1 },
    {  2-1,  6-1, 10-1, 14-1, 18-1, 22-1, 26-1, 30-1, 34-1, 38-1, 42-1, 46-1, 50-1,  255, 2+64-1 },
    {  3-1,  7-1, 11-1, 15-1, 19-1, 23-1, 27-1, 31-1, 35-1, 39-1, 43-1, 47-1, 54-1, 55-1, 5+64-1 },
    {  4-1,  255,  8-1, 12-1, 16-1, 20-1, 24-1, 28-1, 32-1, 36-1, 40-1, 44-1, 51-1, 52-1, 3+64-1 },
    { 57-1, 58-1, 59-1,  255,  255,  255, 60-1,  255,  255, 48-1, 62-1, 63-1, 64-1, 56-1, 4+64-1 }
};
#elif defined(RGB_BACKLIGHT_M6_B)
// M6-B is really simple:
// 0 3 5
// 1 2 4
const uint8_t g_map_row_column_to_led[MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
    {     0,     3,     5,     1,     2,     4 }
};
#endif

void map_row_column_to_led( uint8_t row, uint8_t column, uint8_t *led )
{
    *led = 255;
    if ( row < MATRIX_ROWS && column < MATRIX_COLS )
    {
        *led = pgm_read_byte(&g_map_row_column_to_led[row][column]);
    }
}

void backlight_update_pwm_buffers(void)
{
#if defined(RGB_BACKLIGHT_M6_B)
    IS31FL3218_update_pwm_buffers();
#elif defined(RGB_BACKLIGHT_HS60)
    IS31FL3733_update_pwm_buffers( ISSI_ADDR_1, 0 );
    IS31FL3733_update_led_control_registers( ISSI_ADDR_1, 0 );
#elif defined(RGB_BACKLIGHT_NK65)
    IS31FL3733_update_pwm_buffers( ISSI_ADDR_1, 0 );
    IS31FL3733_update_pwm_buffers( ISSI_ADDR_2, 1 );
    IS31FL3733_update_led_control_registers( ISSI_ADDR_1, 0 );
    IS31FL3733_update_led_control_registers( ISSI_ADDR_2, 1 );
#else
    IS31FL3731_update_pwm_buffers( ISSI_ADDR_1, ISSI_ADDR_2 );
    IS31FL3731_update_led_control_registers( ISSI_ADDR_1, ISSI_ADDR_2 );
#endif
}

void backlight_set_color( int index, uint8_t red, uint8_t green, uint8_t blue )
{
#if defined(RGB_BACKLIGHT_M6_B)
    IS31FL3218_set_color( index, red, green, blue );
#elif defined(RGB_BACKLIGHT_HS60) || defined(RGB_BACKLIGHT_NK65)
    IS31FL3733_set_color( index, red, green, blue );
#else
    IS31FL3731_set_color( index, red, green, blue );
#endif
}

void backlight_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
{
#if defined(RGB_BACKLIGHT_M6_B)
    IS31FL3218_set_color_all( red, green, blue );
#elif defined(RGB_BACKLIGHT_HS60) || defined(RGB_BACKLIGHT_NK65)
    IS31FL3733_set_color_all( red, green, blue );
#else
    IS31FL3731_set_color_all( red, green, blue );
#endif
}

void backlight_set_key_hit(uint8_t row, uint8_t column)
{
    uint8_t led;
    map_row_column_to_led(row,column,&led);
    g_key_hit[led] = 0;

    g_any_key_hit = 0;
}

#if !defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65)
// This is (F_CPU/1024) / 20 Hz
// = 15625 Hz / 20 Hz
// = 781
#define TIMER3_TOP 781

void backlight_timer_init(void)
{
    static uint8_t backlight_timer_is_init = 0;
    if ( backlight_timer_is_init )
    {
        return;
    }
    backlight_timer_is_init = 1;

    // Timer 3 setup
    TCCR3B = _BV(WGM32) |           // CTC mode OCR3A as TOP
             _BV(CS32) | _BV(CS30); // prescale by /1024
    // Set TOP value
    uint8_t sreg = SREG;
    cli();

    OCR3AH = (TIMER3_TOP >> 8) & 0xff;
    OCR3AL = TIMER3_TOP & 0xff;
    SREG = sreg;
}

void backlight_timer_enable(void)
{
    TIMSK3 |= _BV(OCIE3A);
}

void backlight_timer_disable(void)
{
    TIMSK3 &= ~_BV(OCIE3A);
}
#else //STM32, use GPT with TIM4. Enable in halconf.h
static void gpt_backlight_timer_task(GPTDriver *gptp);
// Timer setup at 200Khz, callback at 10k ticks = 20Hz
static GPTConfig gpt4cfg1 = {
    .frequency = 200000U,
    .callback  = gpt_backlight_timer_task
};

void backlight_timer_init(void)
{
    gptStart(&GPTD4, &gpt4cfg1);
}

void backlight_timer_enable(void)
{
    gptStartContinuous(&GPTD4, 10000);
}

void backlight_timer_disable(void)
{
    gptStopTimer(&GPTD4);
}
#endif //!defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65)

void backlight_set_suspend_state(bool state)
{
    g_suspend_state = state;
}

void backlight_set_indicator_state(uint8_t state)
{
    g_indicator_state = state;
}

void backlight_effect_rgb_test(void)
{
    // Mask out bits 4 and 5
    // This 2-bit value will stay the same for 16 ticks.
    switch ( (g_tick & 0x30) >> 4 )
    {
        case 0:
        {
            backlight_set_color_all( 255, 0, 0 );
            break;
        }
        case 1:
        {
            backlight_set_color_all( 0, 255, 0 );
            break;
        }
        case 2:
        {
            backlight_set_color_all( 0, 0, 255 );
            break;
        }
        case 3:
        {
            backlight_set_color_all( 255, 255, 255 );
            break;
        }
    }
}

#if defined(RGB_DEBUGGING_ONLY)
// This tests the LEDs
// Note that it will change the LED control registers
// in the LED drivers, and leave them in an invalid
// state for other backlight effects.
// ONLY USE THIS FOR TESTING LEDS!
void backlight_effect_single_LED_test(void)
{
    static uint8_t color = 0; // 0,1,2 for R,G,B
    static uint8_t row = 0;
    static uint8_t column = 0;

    static uint8_t tick = 0;
    tick++;

    if ( tick > 2 )
    {
        tick = 0;
        column++;
    }
    if ( column > 14 )
    {
        column = 0;
        row++;
    }
    if ( row > 4 )
    {
        row = 0;
        color++;
    }
    if ( color > 2 )
    {
        color = 0;
    }

    uint8_t led;
    map_row_column_to_led( row, column, &led );
    backlight_set_color_all( 255, 255, 255 );
    backlight_test_led( led, color==0, color==1, color==2 );
}
#endif // defined(RGB_DEBUGGING_ONLY)

// All LEDs off
void backlight_effect_all_off(void)
{
    backlight_set_color_all( 0, 0, 0 );
}

// Solid color
void backlight_effect_solid_color(void)
{
    HSV hsv = { .h = g_config.color_1.h, .s = g_config.color_1.s, .v = g_config.brightness };
    RGB rgb = hsv_to_rgb( hsv );
    backlight_set_color_all( rgb.r, rgb.g, rgb.b );
}

// alphas = color1, mods = color2
void backlight_effect_alphas_mods(void)
{
    RGB rgb1 = hsv_to_rgb( (HSV){ .h = g_config.color_1.h, .s = g_config.color_1.s, .v = g_config.brightness } );
    RGB rgb2 = hsv_to_rgb( (HSV){ .h = g_config.color_2.h, .s = g_config.color_2.s, .v = g_config.brightness } );

    for ( int row = 0; row < MATRIX_ROWS; row++ )
    {
        for ( int column = 0; column < MATRIX_COLS; column++ )
        {
            uint8_t index;
            map_row_column_to_led( row, column, &index );
            if ( index < BACKLIGHT_LED_COUNT )
            {
                if ( ( g_config.alphas_mods[row] & (1<<column) ) == 0 )
                {
                    backlight_set_color( index, rgb1.r, rgb1.g, rgb1.b );
                }
                else
                {
                    backlight_set_color( index, rgb2.r, rgb2.g, rgb2.b );
                }
            }
        }
    }
}

void backlight_effect_gradient_up_down(void)
{
    int16_t h1 = g_config.color_1.h;
    int16_t h2 = g_config.color_2.h;
    int16_t deltaH = h2 - h1;

    // Take the shortest path between hues
    if ( deltaH > 127 )
    {
        deltaH -= 256;
    }
    else if ( deltaH < -127 )
    {
        deltaH += 256;
    }
    // Divide delta by 4, this gives the delta per row
    deltaH /= 4;

    int16_t s1 = g_config.color_1.s;
    int16_t s2 = g_config.color_2.s;
    int16_t deltaS = ( s2 - s1 ) / 4;

    HSV hsv = { .h = 0, .s = 255, .v = g_config.brightness };
    RGB rgb;
    Point point;
    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        map_led_to_point( i, &point );
        // The y range will be 0..64, map this to 0..4
        uint8_t y = (point.y>>4);
        // Relies on hue being 8-bit and wrapping
        hsv.h = g_config.color_1.h + ( deltaH * y );
        hsv.s = g_config.color_1.s + ( deltaS * y );
        rgb = hsv_to_rgb( hsv );
        backlight_set_color( i, rgb.r, rgb.g, rgb.b );
    }
}

void backlight_effect_raindrops(bool initialize)
{
    int16_t h1 = g_config.color_1.h;
    int16_t h2 = g_config.color_2.h;
    int16_t deltaH = h2 - h1;
    deltaH /= 4;

    // Take the shortest path between hues
    if ( deltaH > 127 )
    {
        deltaH -= 256;
    }
    else if ( deltaH < -127 )
    {
        deltaH += 256;
    }

    int16_t s1 = g_config.color_1.s;
    int16_t s2 = g_config.color_2.s;
    int16_t deltaS = ( s2 - s1 ) / 4;

    HSV hsv;
    RGB rgb;

    // Change one LED every tick
    uint8_t led_to_change = ( g_tick & 0x000 ) == 0 ? rand() % BACKLIGHT_LED_COUNT : 255;

    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        // If initialize, all get set to random colors
        // If not, all but one will stay the same as before.
        if ( initialize || i == led_to_change )
        {
            hsv.h = h1 + ( deltaH * ( rand() & 0x03 ) );
            hsv.s = s1 + ( deltaS * ( rand() & 0x03 ) );
            // Override brightness with global brightness control
            hsv.v = g_config.brightness;;

            rgb = hsv_to_rgb( hsv );
            backlight_set_color( i, rgb.r, rgb.g, rgb.b );
        }
    }
}

void backlight_effect_cycle_all(void)
{
    uint8_t offset = ( g_tick << g_config.effect_speed ) & 0xFF;

    // Relies on hue being 8-bit and wrapping
    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        uint16_t offset2 = g_key_hit[i]<<2;
#if !defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65)
        // stabilizer LEDs use spacebar hits
        if ( i == 36+6 || i == 54+13 || // LC6, LD13
                ( g_config.use_7u_spacebar && i == 54+14 ) ) // LD14
        {
            offset2 = g_key_hit[36+0]<<2;
        }
#endif
        offset2 = (offset2<=63) ? (63-offset2) : 0;

        HSV hsv = { .h = offset+offset2, .s = 255, .v = g_config.brightness };
        RGB rgb = hsv_to_rgb( hsv );
        backlight_set_color( i, rgb.r, rgb.g, rgb.b );
    }
}

void backlight_effect_cycle_left_right(void)
{
    uint8_t offset = ( g_tick << g_config.effect_speed ) & 0xFF;
    HSV hsv = { .h = 0, .s = 255, .v = g_config.brightness };
    RGB rgb;
    Point point;
    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        uint16_t offset2 = g_key_hit[i]<<2;
#if !defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65)
        // stabilizer LEDs use spacebar hits
        if ( i == 36+6 || i == 54+13 || // LC6, LD13
                ( g_config.use_7u_spacebar && i == 54+14 ) ) // LD14
        {
            offset2 = g_key_hit[36+0]<<2;
        }
#endif
        offset2 = (offset2<=63) ? (63-offset2) : 0;

        map_led_to_point( i, &point );
        // Relies on hue being 8-bit and wrapping
        hsv.h = point.x + offset + offset2;
        rgb = hsv_to_rgb( hsv );
        backlight_set_color( i, rgb.r, rgb.g, rgb.b );
    }
}

void backlight_effect_cycle_up_down(void)
{
    uint8_t offset = ( g_tick << g_config.effect_speed ) & 0xFF;
    HSV hsv = { .h = 0, .s = 255, .v = g_config.brightness };
    RGB rgb;
    Point point;
    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        uint16_t offset2 = g_key_hit[i]<<2;
#if !defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65)
        // stabilizer LEDs use spacebar hits
        if ( i == 36+6 || i == 54+13 || // LC6, LD13
                ( g_config.use_7u_spacebar && i == 54+14 ) ) // LD14
        {
            offset2 = g_key_hit[36+0]<<2;
        }
#endif
        offset2 = (offset2<=63) ? (63-offset2) : 0;

        map_led_to_point( i, &point );
        // Relies on hue being 8-bit and wrapping
        hsv.h = point.y + offset + offset2;
        rgb = hsv_to_rgb( hsv );
        backlight_set_color( i, rgb.r, rgb.g, rgb.b );
    }
}

void backlight_effect_jellybean_raindrops( bool initialize )
{
    HSV hsv;
    RGB rgb;

    // Change one LED every tick
    uint8_t led_to_change = ( g_tick & 0x000 ) == 0 ? rand() % BACKLIGHT_LED_COUNT : 255;

    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        // If initialize, all get set to random colors
        // If not, all but one will stay the same as before.
        if ( initialize || i == led_to_change )
        {
            hsv.h = rand() & 0xFF;
            hsv.s = rand() & 0xFF;
            // Override brightness with global brightness control
            hsv.v = g_config.brightness;;

            rgb = hsv_to_rgb( hsv );
            backlight_set_color( i, rgb.r, rgb.g, rgb.b );
        }
    }
}

void backlight_effect_cycle_radial1(void)
{
    uint8_t offset = ( g_tick << g_config.effect_speed ) & 0xFF;
    HSV hsv = { .h = 0, .s = 255, .v = g_config.brightness };
    RGB rgb;
    Point point;
    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        map_led_to_point_polar( i, &point );
        // Relies on hue being 8-bit and wrapping
        hsv.h = point.x + offset;
        hsv.s = point.y;
        rgb = hsv_to_rgb( hsv );
        backlight_set_color( i, rgb.r, rgb.g, rgb.b );
    }
}

void backlight_effect_cycle_radial2(void)
{
    uint8_t offset = ( g_tick << g_config.effect_speed ) & 0xFF;

    HSV hsv = { .h = 0, .s = g_config.color_1.s, .v = g_config.brightness };
    RGB rgb;
    Point point;
    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        map_led_to_point_polar( i, &point );
        uint8_t offset2 = offset + point.x;
        if ( offset2 & 0x80 )
        {
            offset2 = ~offset2;
        }
        offset2 = offset2 >> 2;
        hsv.h = g_config.color_1.h + offset2;
        hsv.s = 127 + ( point.y >> 1 );
        rgb = hsv_to_rgb( hsv );
        backlight_set_color( i, rgb.r, rgb.g, rgb.b );
    }
}

#if defined(RGB_BACKLIGHT_M6_B)
void backlight_effect_custom_colors(void)
{
    RGB rgb;
    for ( uint8_t i = 0; i < 6; i++ )
    {
        HSV hsv = { .h = g_config.custom_color[i].h, .s = g_config.custom_color[i].s, .v = g_config.brightness };
        rgb = hsv_to_rgb( hsv );
        uint8_t led;
        map_row_column_to_led( 0, i, &led );
        backlight_set_color( led, rgb.r, rgb.g, rgb.b );
    }
}
#endif

void backlight_effect_indicators_set_colors( uint8_t index, HS color )
{
    HSV hsv = { .h = color.h, .s = color.s, .v = g_config.brightness };
    RGB rgb = hsv_to_rgb( hsv );
    if ( index == 254 )
    {
        backlight_set_color_all( rgb.r, rgb.g, rgb.b );
    }
    else
    {
        backlight_set_color( index, rgb.r, rgb.g, rgb.b );

        // If the spacebar LED is the indicator,
        // do the same for the spacebar stabilizers
        if ( index == 36+0 ) // LC0
        {
#if defined(RGB_BACKLIGHT_ZEAL65)
            backlight_set_color( 36+7, rgb.r, rgb.g, rgb.b ); // LC7
            backlight_set_color( 54+14, rgb.r, rgb.g, rgb.b ); // LD14
#elif defined(RGB_BACKLIGHT_KOYU)
            backlight_set_color( 36+6, rgb.r, rgb.g, rgb.b ); // LC6
            backlight_set_color( 54+14, rgb.r, rgb.g, rgb.b ); // LD14
#elif defined(RGB_BACKLIGHT_ZEAL60) || defined(RGB_BACKLIGHT_M60_A)
            backlight_set_color( 36+6, rgb.r, rgb.g, rgb.b ); // LC6
            backlight_set_color( 54+13, rgb.r, rgb.g, rgb.b ); // LD13
            if ( g_config.use_7u_spacebar )
            {
                backlight_set_color( 54+14, rgb.r, rgb.g, rgb.b ); // LD14
            }
#endif
        }
    }
}

// This runs after another backlight effect and replaces
// colors already set
void backlight_effect_indicators(void)
{
    if ( g_config.caps_lock_indicator.index != 255 &&
            ( g_indicator_state & (1<<USB_LED_CAPS_LOCK) ) )
    {
        backlight_effect_indicators_set_colors( g_config.caps_lock_indicator.index, g_config.caps_lock_indicator.color );
    }

#if defined(RGB_BACKLIGHT_NK65)
    if ( g_indicator_state & (1<<USB_LED_CAPS_LOCK) )
    {
        IS31FL3733_set_color( 7+64-1, 0, 255, 0 );
    } else {
        IS31FL3733_set_color( 7+64-1, 0, 0, 0 );
    }
    if ( g_indicator_state & (1<<USB_LED_SCROLL_LOCK) )
    {
        IS31FL3733_set_color( 6+64-1, 255, 0, 255 );
    } else {
        IS31FL3733_set_color( 6+64-1, 0, 0, 0 );
    }
    if ( g_indicator_state & (1<<USB_LED_NUM_LOCK) )
    {
        IS31FL3733_set_color( 6+64-1, 0, 255, 0 );
    } else {
        IS31FL3733_set_color( 6+64-1, 0, 0, 0 );
    }
#endif

    // This if/else if structure allows higher layers to
    // override lower ones. If we set layer 3's indicator
    // to none, then it will NOT show layer 2 or layer 1
    // indicators, even if those layers are on via the
    // MO13/MO23 Fn combo magic.
    //
    // Basically we want to handle the case where layer 3 is
    // still the backlight configuration layer and we don't
    // want "all LEDs" indicators hiding the backlight effect,
    // but still allow end users to do whatever they want.
    if ( IS_LAYER_ON(3) )
    {
        if ( g_config.layer_3_indicator.index != 255 )
        {
            backlight_effect_indicators_set_colors( g_config.layer_3_indicator.index, g_config.layer_3_indicator.color );
        }
    }
    else if ( IS_LAYER_ON(2) )
    {
        if ( g_config.layer_2_indicator.index != 255 )
        {
            backlight_effect_indicators_set_colors( g_config.layer_2_indicator.index, g_config.layer_2_indicator.color );
        }
    }
    else if ( IS_LAYER_ON(1) )
    {
        if ( g_config.layer_1_indicator.index != 255 )
        {
            backlight_effect_indicators_set_colors( g_config.layer_1_indicator.index, g_config.layer_1_indicator.color );
        }
    }
}

#if !defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65)
ISR(TIMER3_COMPA_vect)
#else //STM32 interrupt
static void gpt_backlight_timer_task(GPTDriver *gptp)
#endif
{
    // delay 1 second before driving LEDs or doing anything else
    static uint8_t startup_tick = 0;
    if ( startup_tick < 20 )
    {
        startup_tick++;
        return;
    }

    g_tick++;

    if ( g_any_key_hit < 0xFFFFFFFF )
    {
        g_any_key_hit++;
    }

    for ( int led = 0; led < BACKLIGHT_LED_COUNT; led++ )
    {
        if ( g_key_hit[led] < 255 )
        {
            g_key_hit[led]++;
        }
    }

    // Factory default magic value
    if ( g_config.effect == 255 )
    {
        backlight_effect_rgb_test();
        return;
    }

    // Ideally we would also stop sending zeros to the LED driver PWM buffers
    // while suspended and just do a software shutdown. This is a cheap hack for now.
    bool suspend_backlight = ((g_suspend_state && g_config.disable_when_usb_suspended) ||
            (g_config.disable_after_timeout > 0 && g_any_key_hit > g_config.disable_after_timeout * 60 * 20));
    uint8_t effect = suspend_backlight ? 0 : g_config.effect;

    // Keep track of the effect used last time,
    // detect change in effect, so each effect can
    // have an optional initialization.
    static uint8_t effect_last = 255;
    bool initialize = effect != effect_last;
    effect_last = effect;

    // this gets ticked at 20 Hz.
    // each effect can opt to do calculations
    // and/or request PWM buffer updates.
    switch ( effect )
    {
        case 0:
            backlight_effect_all_off();
            break;
        case 1:
            backlight_effect_solid_color();
            break;
        case 2:
#if defined(RGB_BACKLIGHT_M6_B)
            backlight_effect_custom_colors();
#else
            backlight_effect_alphas_mods();
#endif
            break;
        case 3:
            backlight_effect_gradient_up_down();
            break;
        case 4:
            backlight_effect_raindrops( initialize );
            break;
        case 5:
            backlight_effect_cycle_all();
            break;
        case 6:
            backlight_effect_cycle_left_right();
            break;
        case 7:
            backlight_effect_cycle_up_down();
            break;
        case 8:
            backlight_effect_jellybean_raindrops( initialize );
            break;
        case 9:
            backlight_effect_cycle_radial1();
            break;
        case 10:
            backlight_effect_cycle_radial2();
            break;
        default:
            backlight_effect_all_off();
            break;
    }

    if ( ! suspend_backlight )
    {
#if !defined(RGB_BACKLIGHT_M6_B)
        backlight_effect_indicators();
#endif
    }
}

void backlight_set_indicator_index( uint8_t *index, uint8_t row, uint8_t column )
{
    if ( row >= MATRIX_ROWS )
    {
        // Special value, 255=none, 254=all
        *index = row;
    }
    else
    {
        map_row_column_to_led( row, column, index );
    }
}

void backlight_get_indicator_row_col( uint8_t index, uint8_t *row, uint8_t *column )
{
    if ( index == 255 || index == 254 )
    {
        // Special value, 255=none, 254=all
        *row = index;
        *column = 0;
        return;
    }
    for ( uint8_t r = 0; r < MATRIX_ROWS; r++ )
    {
        for ( uint8_t c = 0; c < MATRIX_COLS; c++ )
        {
            uint8_t i = 255;
            map_row_column_to_led( r, c, &i );
            if ( i == index )
            {
                *row = r;
                *column = c;
                return;
            }
        }
    }
}

// Some helpers for setting/getting HSV
void _set_color( HS *color, uint8_t *data )
{
    color->h = data[0];
    color->s = data[1];
}

void _get_color( HS *color, uint8_t *data )
{
    data[0] = color->h;
    data[1] = color->s;
}

void backlight_config_set_value( uint8_t *data )
{
    bool reinitialize = false;
    uint8_t *value_id = &(data[0]);
    uint8_t *value_data = &(data[1]);
    switch ( *value_id )
    {
#if defined (RGB_BACKLIGHT_ZEAL60) || defined(RGB_BACKLIGHT_ZEAL65)
        case id_use_split_backspace:
        {
            g_config.use_split_backspace = (bool)*value_data;
            reinitialize = true;
            break;
        }
#endif
#if defined (RGB_BACKLIGHT_ZEAL60)
        case id_use_split_left_shift:
        {
            g_config.use_split_left_shift = (bool)*value_data;
            reinitialize = true;
            break;
        }
        case id_use_split_right_shift:
        {
            g_config.use_split_right_shift = (bool)*value_data;
            reinitialize = true;
            break;
        }
        case id_use_7u_spacebar:
        {
            g_config.use_7u_spacebar = (bool)*value_data;
            reinitialize = true;
            break;
        }
        case id_use_iso_enter:
        {
            g_config.use_iso_enter = (bool)*value_data;
            reinitialize = true;
            break;
        }
        case id_disable_hhkb_blocker_leds:
        {
            g_config.disable_hhkb_blocker_leds = (bool)*value_data;
            reinitialize = true;
            break;
        }
#endif
        case id_disable_when_usb_suspended:
        {
            g_config.disable_when_usb_suspended = (bool)*value_data;
            break;
        }
        case id_disable_after_timeout:
        {
            g_config.disable_after_timeout = *value_data;
            break;
        }
        case id_brightness:
        {
            g_config.brightness = *value_data;
            break;
        }
        case id_effect:
        {
            g_config.effect = *value_data;
            break;
        }
        case id_effect_speed:
        {
            g_config.effect_speed = *value_data;
            break;
        }
        case id_color_1:
        {
            _set_color( &(g_config.color_1), value_data );
            break;
        }
        case id_color_2:
        {
            _set_color( &(g_config.color_2), value_data );
            break;
        }
        case id_caps_lock_indicator_color:
        {
            _set_color( &(g_config.caps_lock_indicator.color), value_data );
            break;
        }
        case id_caps_lock_indicator_row_col:
        {
            backlight_set_indicator_index( &(g_config.caps_lock_indicator.index), value_data[0], value_data[1] );
            break;
        }
        case id_layer_1_indicator_color:
        {
            _set_color( &(g_config.layer_1_indicator.color), value_data );
            break;
        }
        case id_layer_1_indicator_row_col:
        {
            backlight_set_indicator_index( &(g_config.layer_1_indicator.index), value_data[0], value_data[1] );
            break;
        }
        case id_layer_2_indicator_color:
        {
            _set_color( &(g_config.layer_2_indicator.color), value_data );
            break;
        }
        case id_layer_2_indicator_row_col:
        {
            backlight_set_indicator_index( &(g_config.layer_2_indicator.index), value_data[0], value_data[1] );
            break;
        }
        case id_layer_3_indicator_color:
        {
            _set_color( &(g_config.layer_3_indicator.color), value_data );
            break;
        }
        case id_layer_3_indicator_row_col:
        {
            backlight_set_indicator_index( &(g_config.layer_3_indicator.index), value_data[0], value_data[1] );
            break;
        }
        case id_alphas_mods:
        {
            for ( int i=0; i<5; i++ )
            {
                g_config.alphas_mods[i] = ( *(value_data+i*2) << 8 ) | ( *(value_data+i*2+1) );
            }
        }
#if defined(RGB_BACKLIGHT_M6_B)
        case id_custom_color:
        {
            uint8_t index = value_data[0];
            if ( index >= 0 && index <= 6 )
            {
                _set_color( &(g_config.custom_color[index]), &(value_data[1]) );
            }
        }
#endif
    }

    if ( reinitialize )
    {
        backlight_init_drivers();
    }
}

void backlight_config_get_value( uint8_t *data )
{
    uint8_t *value_id = &(data[0]);
    uint8_t *value_data = &(data[1]);
    switch ( *value_id )
    {
        case id_use_split_backspace:
        {
            *value_data = ( g_config.use_split_backspace ? 1 : 0 );
            break;
        }
        case id_use_split_left_shift:
        {
            *value_data = ( g_config.use_split_left_shift ? 1 : 0 );
            break;
        }
        case id_use_split_right_shift:
        {
            *value_data = ( g_config.use_split_right_shift ? 1 : 0 );
            break;
        }
        case id_use_7u_spacebar:
        {
            *value_data = ( g_config.use_7u_spacebar ? 1 : 0 );
            break;
        }
        case id_use_iso_enter:
        {
            *value_data = ( g_config.use_iso_enter ? 1 : 0 );
            break;
        }
        case id_disable_when_usb_suspended:
        {
            *value_data = ( g_config.disable_when_usb_suspended ? 1 : 0 );
            break;
        }
        case id_disable_hhkb_blocker_leds:
        {
            *value_data = ( g_config.disable_hhkb_blocker_leds ? 1 : 0 );
            break;
        }
        case id_disable_after_timeout:
        {
            *value_data = g_config.disable_after_timeout;
            break;
        }
        case id_brightness:
        {
            *value_data = g_config.brightness;
            break;
        }
        case id_effect:
        {
            *value_data = g_config.effect;
            break;
        }
        case id_effect_speed:
        {
            *value_data = g_config.effect_speed;
            break;
        }
        case id_color_1:
        {
            _get_color( &(g_config.color_1), value_data );
            break;
        }
        case id_color_2:
        {
            _get_color( &(g_config.color_2), value_data );
            break;
        }
        case id_caps_lock_indicator_color:
        {
            _get_color( &(g_config.caps_lock_indicator.color), value_data );
            break;
        }
        case id_caps_lock_indicator_row_col:
        {
            backlight_get_indicator_row_col( g_config.caps_lock_indicator.index, &(value_data[0]), &(value_data[1]) );
            break;
        }
        case id_layer_1_indicator_color:
        {
            _get_color( &(g_config.layer_1_indicator.color), value_data );
            break;
        }
        case id_layer_1_indicator_row_col:
        {
            backlight_get_indicator_row_col( g_config.layer_1_indicator.index, &(value_data[0]), &(value_data[1]) );
            break;
        }
        case id_layer_2_indicator_color:
        {
            _get_color( &(g_config.layer_2_indicator.color), value_data );
            break;
        }
        case id_layer_2_indicator_row_col:
        {
            backlight_get_indicator_row_col( g_config.layer_2_indicator.index, &(value_data[0]), &(value_data[1]) );
            break;
        }
        case id_layer_3_indicator_color:
        {
            _get_color( &(g_config.layer_3_indicator.color), value_data );
            break;
        }
        case id_layer_3_indicator_row_col:
        {
            backlight_get_indicator_row_col( g_config.layer_3_indicator.index, &(value_data[0]), &(value_data[1]) );
            break;
        }
        case id_alphas_mods:
        {
            for ( int i=0; i<5; i++ )
            {
                *(value_data+i*2) = g_config.alphas_mods[i] >> 8;
                *(value_data+i*2+1) = g_config.alphas_mods[i] & 0xFF;
            }
        }
#if defined(RGB_BACKLIGHT_M6_B)
        case id_custom_color:
        {
            uint8_t index = value_data[0];
            if ( index >= 0 && index <= 6 )
            {
                _get_color( &(g_config.custom_color[index]), &(value_data[1]) );
            }
        }
#endif
    }
}

void backlight_config_set_alphas_mods( uint16_t *alphas_mods )
{
    for ( int i=0; i<5; i++ )
    {
        g_config.alphas_mods[i] = alphas_mods[i];
    }

    backlight_config_save();
}

void backlight_config_load(void)
{
    eeprom_read_block( &g_config, ((void*)RGB_BACKLIGHT_CONFIG_EEPROM_ADDR), sizeof(backlight_config) );
}

void backlight_config_save(void)
{
    eeprom_update_block( &g_config, ((void*)RGB_BACKLIGHT_CONFIG_EEPROM_ADDR), sizeof(backlight_config) );
}

void backlight_init_drivers(void)
{
    // Initialize I2C
    i2c_init();

#if defined(RGB_BACKLIGHT_M6_B)
    IS31FL3218_init();
#elif defined(RGB_BACKLIGHT_HS60)
    IS31FL3733_init( ISSI_ADDR_1, 0 );

    for ( int index = 0; index < DRIVER_LED_TOTAL; index++ )
    {
#if defined(HS60_ANSI)
        bool enabled = !( ( index == 48-1 ) || //LA48
                          ( index == 51-1 ) || //LA51
                          ( index == 61-1 ) ); //LA61
#elif defined(HS60_HHKB)
        bool enabled = !( ( index == 61-1 ) || //LA61
                          ( index == 62-1 ) ); //LA62
#else //HS60_ISO
        bool enabled = !( ( index == 51-1 ) || //LA51
                          ( index == 61-1 ) ); //LA61
#endif
                // This only caches it for later
        IS31FL3733_set_led_control_register( index, enabled, enabled, enabled );
    }
    // This actually updates the LED drivers
    IS31FL3733_update_led_control_registers( ISSI_ADDR_1, 0 );
#elif defined(RGB_BACKLIGHT_NK65)
    IS31FL3733_init( ISSI_ADDR_1, 0 );
    IS31FL3733_init( ISSI_ADDR_2, 0 );

    for ( int index = 0; index < DRIVER_LED_TOTAL; index++ )
    {
        bool enabled = !( ( index == 61-1 )   || //LA61
                          ( index > 6+64-1 ) ); //LB7-LB64
        // This only caches it for later
        IS31FL3733_set_led_control_register( index, enabled, enabled, enabled );
    }
    IS31FL3733_set_led_control_register( 7+64-1, 0, 1, 0 ); //Enable LB7 green enable for indicators
    // This actually updates the LED drivers
    IS31FL3733_update_led_control_registers( ISSI_ADDR_1, 0 );
    IS31FL3733_update_led_control_registers( ISSI_ADDR_2, 1 );
#else
    IS31FL3731_init( ISSI_ADDR_1 );
    IS31FL3731_init( ISSI_ADDR_2 );

    for ( int index = 0; index < DRIVER_LED_TOTAL; index++ )
    {
        // OR the possible "disabled" cases together, then NOT the result to get the enabled state
        // LC6 LD13 not present on Zeal65
#if defined(RGB_BACKLIGHT_ZEAL65)
        bool enabled = !( ( index == 18+5 && !g_config.use_split_backspace ) || // LB5
                          ( index == 36+6 ) || // LC6
                          ( index == 54+13 ) ); // LD13
#elif defined(RGB_BACKLIGHT_KOYU)
        bool enabled = !( ( index == 36+15 ) || // LC15
                          ( index == 54+13 ) || // LD13
                          ( index == 54+17 ) ); // LD17
#elif defined(RGB_BACKLIGHT_M60_A)
        bool enabled = !(
        // LB6 LB7 LB8 LB15 LB16 LB17 not present on M60-A
                          ( index == 18+6 ) || // LB6
                          ( index == 18+7 ) || // LB7
                          ( index == 18+8 ) || // LB8
                          ( index == 18+15 ) || // LB15
                          ( index == 18+16 ) || // LB16
                          ( index == 18+17 ) || // LB17
        // HHKB blockers (LC17, LD17) and ISO extra keys (LC15,LD13) not present on M60-A
                          ( index == 36+17 ) || // LC17
                          ( index == 54+17 ) || // LD17
                          ( index == 36+15 ) || // LC15
                          ( index == 54+13 ) ); // LD13
#elif defined(RGB_BACKLIGHT_ZEAL60)
        // LB6 LB7 LB8 LB15 LB16 LB17 not present on Zeal60
        bool enabled = !( ( index == 18+5 && !g_config.use_split_backspace ) || // LB5
                          ( index == 36+15 && !g_config.use_split_left_shift ) || // LC15
                          ( index == 54+8 && !g_config.use_split_right_shift ) || // LD8
                          ( index == 54+13 && g_config.use_7u_spacebar ) || // LD13
                          ( index == 36+17 && g_config.disable_hhkb_blocker_leds ) || // LC17
                          ( index == 54+17 && g_config.disable_hhkb_blocker_leds ) ||  // LD17
                          ( index == 18+6 ) || // LB6
                          ( index == 18+7 ) || // LB7
                          ( index == 18+8 ) || // LB8
                          ( index == 18+15 ) || // LB15
                          ( index == 18+16 ) || // LB16
                          ( index == 18+17 ) ); // LB17
#endif
        // This only caches it for later
        IS31FL3731_set_led_control_register( index, enabled, enabled, enabled );
    }
    // This actually updates the LED drivers
    IS31FL3731_update_led_control_registers( ISSI_ADDR_1, ISSI_ADDR_2 );
#endif // !defined(RGB_BACKLIGHT_M6_B)

    // TODO: put the 1 second startup delay here?

    // clear the key hits
    for ( int led=0; led<BACKLIGHT_LED_COUNT; led++ )
    {
        g_key_hit[led] = 255;
    }
}

bool process_record_backlight(uint16_t keycode, keyrecord_t *record)
{
    // Record keypresses for backlight effects
    if ( record->event.pressed )
    {
        backlight_set_key_hit( record->event.key.row, record->event.key.col );
    }

    switch(keycode)
    {
        case BR_INC:
            if (record->event.pressed)
            {
                backlight_brightness_increase();
            }
            return false;
            break;
        case BR_DEC:
            if (record->event.pressed)
            {
                backlight_brightness_decrease();
            }
            return false;
            break;
        case EF_INC:
            if (record->event.pressed)
            {
                backlight_effect_increase();
            }
            return false;
            break;
        case EF_DEC:
            if (record->event.pressed)
            {
                backlight_effect_decrease();
            }
            return false;
            break;
        case ES_INC:
            if (record->event.pressed)
            {
                backlight_effect_speed_increase();
            }
            return false;
            break;
        case ES_DEC:
            if (record->event.pressed)
            {
                backlight_effect_speed_decrease();
            }
            return false;
            break;
        case H1_INC:
            if (record->event.pressed)
            {
                backlight_color_1_hue_increase();
            }
            return false;
            break;
        case H1_DEC:
            if (record->event.pressed)
            {
                backlight_color_1_hue_decrease();
            }
            return false;
            break;
        case S1_INC:
            if (record->event.pressed)
            {
                backlight_color_1_sat_increase();
            }
            return false;
            break;
        case S1_DEC:
            if (record->event.pressed)
            {
                backlight_color_1_sat_decrease();
                break;
            }
            return false;
            break;
        case H2_INC:
            if (record->event.pressed)
            {
                backlight_color_2_hue_increase();
            }
            return false;
            break;
        case H2_DEC:
            if (record->event.pressed)
            {
                backlight_color_2_hue_decrease();
            }
            return false;
            break;
        case S2_INC:
            if (record->event.pressed)
            {
                backlight_color_2_sat_increase();
            }
            return false;
            break;
        case S2_DEC:
            if (record->event.pressed)
            {
                backlight_color_2_sat_decrease();
                break;
            }
            return false;
            break;
    }

    return true;
}

// Deals with the messy details of incrementing an integer
uint8_t increment( uint8_t value, uint8_t step, uint8_t min, uint8_t max )
{
    int16_t new_value = value;
    new_value += step;
    return MIN( MAX( new_value, min ), max );
}

uint8_t decrement( uint8_t value, uint8_t step, uint8_t min, uint8_t max )
{
    int16_t new_value = value;
    new_value -= step;
    return MIN( MAX( new_value, min ), max );
}

void backlight_effect_increase(void)
{
    g_config.effect = increment( g_config.effect, 1, 0, BACKLIGHT_EFFECT_MAX );
    backlight_config_save();
}

void backlight_effect_decrease(void)
{
    g_config.effect = decrement( g_config.effect, 1, 0, BACKLIGHT_EFFECT_MAX );
    backlight_config_save();
}

void backlight_effect_speed_increase(void)
{
    g_config.effect_speed = increment( g_config.effect_speed, 1, 0, 3 );
    backlight_config_save();
}

void backlight_effect_speed_decrease(void)
{
    g_config.effect_speed = decrement( g_config.effect_speed, 1, 0, 3 );
    backlight_config_save();
}

void backlight_brightness_increase(void)
{
    g_config.brightness = increment( g_config.brightness, 8, 0, 255 );
    backlight_config_save();
}

void backlight_brightness_decrease(void)
{
    g_config.brightness = decrement( g_config.brightness, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_1_hue_increase(void)
{
    g_config.color_1.h = increment( g_config.color_1.h, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_1_hue_decrease(void)
{
    g_config.color_1.h = decrement( g_config.color_1.h, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_1_sat_increase(void)
{
    g_config.color_1.s = increment( g_config.color_1.s, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_1_sat_decrease(void)
{
    g_config.color_1.s = decrement( g_config.color_1.s, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_2_hue_increase(void)
{
    g_config.color_2.h = increment( g_config.color_2.h, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_2_hue_decrease(void)
{
    g_config.color_2.h = decrement( g_config.color_2.h, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_2_sat_increase(void)
{
    g_config.color_2.s = increment( g_config.color_2.s, 8, 0, 255 );
    backlight_config_save();
}

void backlight_color_2_sat_decrease(void)
{
    g_config.color_2.s = decrement( g_config.color_2.s, 8, 0, 255 );
    backlight_config_save();
}

#if defined(RGB_DEBUGGING_ONLY)
void backlight_test_led( uint8_t index, bool red, bool green, bool blue )
{
    for ( int i=0; i<BACKLIGHT_LED_COUNT; i++ )
    {
        if ( i == index )
        {
            IS31FL3731_set_led_control_register( i, red, green, blue );
        }
        else
        {
            IS31FL3731_set_led_control_register( i, false, false, false );
        }
    }
}

void backlight_debug_led( bool state )
{
    if (state)
    {
        // Output high.
        DDRE |= (1<<6);
        PORTE |= (1<<6);
    }
    else
    {
        // Output low.
        DDRE &= ~(1<<6);
        PORTE &= ~(1<<6);
    }
}
#endif // defined(RGB_DEBUGGING_ONLY)

#endif // BACKLIGHT_ENABLED
