Lfkeyboards updates (#2421)

* Update smk65 fn layer, add iso

* Added Fn layer to ISO keymap

* Fix error when backlight is disabled but lighting isn't

* Remove broke mini1800 iso map

* Add keymaps

* Add LFKPad

* Add split delete to lfk78

* Typo

* Custom keymap

4 files changed, 285 insertions, 0 deletions

diff --git a/keyboards/lfkeyboards/lfk87/keymaps/ca178858/config.h b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/config.h
new file mode 100644
index 0000000000..8893d122e0
--- /dev/null
+++ b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/config.h
@@ -0,0 +1,8 @@
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include "../../config.h"
+
+// place overrides here
+
+#endif
diff --git a/keyboards/lfkeyboards/lfk87/keymaps/ca178858/keymap.c b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/keymap.c
new file mode 100644
index 0000000000..37505ae6d1
--- /dev/null
+++ b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/keymap.c
@@ -0,0 +1,223 @@
+#include "lfk87.h"
+#include "issi.h"
+#include "lighting.h"
+#include "action_layer.h"
+#include "process_tap_dance.h"
+
+//Define a shorter 'transparent' key code to make the keymaps more compact
+#define KC_TR KC_TRNS
+
+enum keymap_layout {
+    VANILLA = 0,  // matches MF68 layout
+    DEFAULT_WKL,  // 0x02 Function in CapsLock location, gui key disabled
+    DEFAULT_OSX,  // 0x04 Function in CapsLock location, gui/alt swapped for OSX
+    CS_GO,        // 0x08 Function in CapsLock location, gui/alt swapped for OSX
+    FUNC,         // 0x10
+    SETTINGS,     // 0x20
+};
+
+enum {
+    TD_ESC_FUNC = 0,
+};
+
+
+// Colors of the layer indicator LED
+// This list needs to define layer 0xFFFFFFFF, it is the end of the list, and the unknown layer
+const Layer_Info layer_info[] = {
+  // Layer     Mask           Red     Green   Blue
+  {0x00000000, 0xFFFFFFF8, {0x00, 0xFF, 0x00}}, // base layers (VANILLA, DEFAULT_WKL, DEFAULT_OSX) - green
+  {0x00000008, 0xFFFFFFF8, {0x07FF, 0x07FF, 0x0000}}, // CSGO layer - orange
+  {0x00000010, 0xFFFFFFF0, {0x0000, 0x0000, 0x0FFF}}, // function layer - blue
+  {0x00000020, 0xFFFFFFE0, {0x0FFF, 0x0000, 0x0FFF}}, // settings layer - magenta
+  {0xFFFFFFFF, 0xFFFFFFFF, {0x0FFF, 0x0FFF, 0x0FFF}}, // unknown layer - REQUIRED - white
+};
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[VANILLA] = KEYMAP(
+    /* Keymap VANILLA: (Base Layer) Default Layer
+    * ,-----------------------------------------------------------------------------.
+    * |Esc  |f1| f2| f3| f4|  | f5| f6| f7| f8|   | f9|f10|f11|f12|  |Prnt|ScLk|Paus|
+    * |-----------------------------------------------------------|  |--------------|
+    * | ~ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  0| - | = |Backsp |  | Ins|Home|PgUp|
+    * |-----------------------------------------------------------|  |--------------|
+    * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|    \|  | Del| End|PgDn|
+    * |-----------------------------------------------------------|  `--------------'
+    * |CAPS   |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Return |
+    * |-----------------------------------------------------------|        ,----.
+    * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift     |        | Up |
+    * |-----------------------------------------------------------|   ,-------------.
+    * |Ctrl|Gui |Alt |      Space            |ALT |GUI |CTRL |Func|   |Lft| Dn |Rig |
+    * `-----------------------------------------------------------'   `-------------'
+    */
+    KC_ESC, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_0, KC_1, KC_2, KC_3, KC_4, KC_5, \
+    KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC, KC_INS, KC_HOME, KC_PGUP, \
+    KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS, KC_DELETE, KC_END, KC_PGDN, \
+    KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,  \
+    KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT, KC_UP, \
+    KC_LCTL, KC_LALT, KC_LGUI, KC_SPC, KC_RGUI, KC_RCTL, MO(FUNC), MO(SETTINGS), KC_LEFT, KC_DOWN, KC_RGHT),
+    /* Keymap DEFAULT_TKL: (Base Layer) Default Layer
+    * ,-----------------------------------------------------------------------------.
+    * |Esc  |f1| f2| f3| f4|  | f5| f6| f7| f8|   | f9|f10|f11|f12|  |Prnt|ScLk|Paus|
+    * |-----------------------------------------------------------|  |--------------|
+    * | ~ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  0| - | = |Backsp |  | Ins|Home|PgUp|
+    * |-----------------------------------------------------------|  |--------------|
+    * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|    \|  | Del| End|PgDn|
+    * |-----------------------------------------------------------|  `--------------'
+    * |CAPS   |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Return |
+    * |-----------------------------------------------------------|       ,----.
+    * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift     |       | Up |
+    * |-----------------------------------------------------------|   ,-------------.
+    * |Ctrl|    |Alt |      Space            |ALT |    |CTRL |Func|   |Lft| Dn |Rig |
+    * `-----------------------------------------------------------'   `-------------'
+    */
+[DEFAULT_WKL] = KEYMAP(
+    KC_ESC, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_PSCR, KC_SLCK, KC_PAUS, \
+    KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC, KC_INS, KC_HOME, KC_PGUP, \
+    KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS, KC_DELETE, KC_END, KC_PGDN, \
+    KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,  \
+    KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT, KC_UP, \
+    KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_RALT, KC_RGUI, KC_RCTL, MO(FUNC), KC_LEFT, KC_DOWN, KC_RGHT),
+
+    /* Keymap DEFAULT_OSX: (Base Layer) Default Layer
+    * ,-----------------------------------------------------------------------------.
+    * |Esc  |f1| f2| f3| f4|  | f5| f6| f7| f8|   | f9|f10|f11|f12|  |Prnt|ScLk|Paus|
+    * |-----------------------------------------------------------|  |--------------|
+    * | ~ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  0| - | = |Backsp |  | Ins|Home|PgUp|
+    * |-----------------------------------------------------------|  |--------------|
+    * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|    \|  | Del| End|PgDn|
+    * |-----------------------------------------------------------|  `--------------'
+    * |CAPS   |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Return |
+    * |-----------------------------------------------------------|        ,----.
+    * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift     |        | Up |
+    * |-----------------------------------------------------------|   ,-------------.
+    * |Ctrl| Opt |Cmd |      Space           |Cmd |Opt |CTRL |Func|   |Lft| Dn |Rig |
+    * `-----------------------------------------------------------'   `-------------'
+    */
+[DEFAULT_OSX] = KEYMAP(
+    KC_ESC, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_SLCK, KC_PAUS, LALT(KC_F5), \
+    KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC, KC_INS, KC_HOME, KC_PGUP, \
+    KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS, KC_DELETE, KC_END, KC_PGDN, \
+    TD(TD_ESC_FUNC), KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,  \
+    KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT, KC_UP, \
+    KC_LCTL, KC_LALT, KC_LGUI, KC_SPC, KC_RGUI, KC_RCTL, MO(FUNC),MO(SETTINGS), KC_LEFT, KC_DOWN, KC_RGHT),
+[CS_GO] = KEYMAP(
+   KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,   KC_TR,   KC_TR,  KC_TR, \
+   KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,   KC_TR,   KC_FN0, KC_TR, KC_TR, \
+   KC_TR,  KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,  KC_TR,   KC_TR,  KC_TR, KC_TR, \
+   KC_LCTL,  KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,      KC_TR, \
+   KC_TR,     KC_TR,  KC_TR,  KC_TR,  KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,          KC_TR,           KC_TR, \
+   KC_TR,  KC_TR, KC_TR,                  KC_TR,                           KC_TR, KC_TR, KC_TR,  KC_TR,  KC_TR,  KC_TR, KC_TR),
+
+  /* Keymap FUNCTION: Function Layer
+   * ,-------------------------------------------------------------.  ,--------------.
+   * |Esc  |f1| f2| f3| f4|  | f5| f6| f7| f8|   | f9|f10|f11|f12  |  |Prnt|ScLk|Paus|
+   * |-------------------------------------------------------------|  |--------------|
+   * | ` |F1 |F2 |F3 |F4 |F5 |F6 |F7 |F8 |F9 |F10|F11|F12|Delete   |  |    |    |    |
+   * |-------------------------------------------------------------|  |--------------|
+   * |Tab  |   |PgU|   |   |   |   |   | Up|   |   |   |   |       |  |    |    |    |
+   * |-------------------------------------------------------------|  `--------------'
+   * |Control|Hme|PgD|End|   |   |   |Lft|Dwn|Rgt|   |   |         |
+   * |-------------------------------------------------------------|       ,----.
+   * |Shift   |   |Del|   |   |   |   |Mute|V- |V+ |  |TG(SETTINGS)|       | Up |
+   * |-------------------------------------------------------------'   ,-------------.
+   * |Func|Win |Alt |        PgD           |Alt |Ctrl |Func |          |Lft| Dn |Rig |
+   * `------------------------------------------------------'          `-------------'
+   */
+[FUNC] = KEYMAP(
+   KC_ESC, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,                        KC_PSCR, KC_SLCK, KC_PAUS, \
+   KC_TR,  KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,               KC_DEL,  TO(CS_GO), KC_TR, KC_TR, \
+   KC_NO,KC_PGUP, KC_UP, KC_PGDN, KC_HOME, KC_NO, KC_NO, KC_NO, KC_UP, KC_NO, KC_NO, KC_NO, KC_NO,               KC_NO,   KC_TR, KC_TR, KC_TR, \
+   KC_TR, KC_LEFT, KC_DOWN, KC_RGHT, KC_END, KC_NO, KC_NO, KC_LEFT, KC_DOWN, KC_RGHT, KC_NO, KC_NO,            KC_NO, \
+   KC_TR,    KC_NO,  KC_DEL,  KC_NO,  KC_NO, KC_NO, KC_NO, KC_MUTE, KC_VOLD, KC_VOLU, KC_NO,   TG(SETTINGS),                 KC_TR, \
+   KC_TR,  KC_TR, KC_TR,                  KC_PGDN,                           KC_TR, KC_TR, KC_TR,  KC_TR,            KC_TR,  KC_TR, KC_TR),
+
+   /* Keymap SETTINGS: Settings Layer
+    * ,-----------------------------------------------------------.     ,-------------.
+    * |Esc  |f1| f2| f3| f4|  | f5| f6| f7| f8|   | f9|f10|f11|f12  |  |Prnt|ScLk|Paus|
+    * |-------------------------------------------------------------|  |--------------|
+    * |LayClr|   |   |   |   |   |   |   |   |  |   |BL-|BL+|BL Togl|    |RGB Tog |Val+|
+    * |-----------------------------------------------------------|    |-------------|
+    * |Debug|   |   |   |   |   |   |   |   |   |   |   |  |LEDTst|    |RGB Mode|Val-|
+    * |-----------------------------------------------------------|    `-------------'
+    * |AU_TOG |Hz+|MS+|   |   |   |   |   |   |   |   |   |  RST  |
+    * |-----------------------------------------------------------|  ,----.
+    * |ClickTgl|Hz-|MS-|   |   |   |   |   |   |   |   |Layer Clr |  |Hue+|
+    * |------------------------------------------------------------------------.
+    * |    |    |    |      Print Debug      |    |    |     |  |Sat-|Hue-|Sat+|
+    * `------------------------------------------------------'  `--------------'
+    */
+[SETTINGS] = KEYMAP(
+  KC_FN13,  KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, BL_DEC,            KC_NO,   KC_NO,   KC_NO,
+  KC_FN0,KC_FN3,KC_FN4,KC_FN5, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, BL_DEC, BL_INC, BL_TOGG,  RGB_TOG, RGB_VAI, KC_NO,
+  MU_MOD,  KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,    KC_FN2,  RGB_MOD, RGB_VAD, KC_NO,
+  AU_TOG, KC_FN6,KC_FN8, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,            RESET,
+  KC_FN10, KC_FN7,KC_FN9, KC_NO, KC_NO, KC_NO, KC_NO, MU_TOG, KC_NO, KC_NO, KC_NO,                 KC_FN0,           RGB_HUI,
+  KC_NO, KC_NO, KC_NO,                  KC_FN12,                           KC_NO, KC_NO, KC_NO, KC_TR,     RGB_SAD, RGB_HUD, RGB_SAI),
+};
+
+void tap_esc_func_finished(qk_tap_dance_state_t *state, void *user_data) {
+    if(state->pressed){
+        layer_on(FUNC);
+    }else{
+        register_code(KC_ESC);
+        unregister_code(KC_ESC);
+    }
+}
+
+void tap_esc_func_reset(qk_tap_dance_state_t *state, void *user_data) {
+    layer_off(FUNC);
+}
+
+qk_tap_dance_action_t tap_dance_actions[] = {
+  [TD_ESC_FUNC] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, tap_esc_func_finished, tap_esc_func_reset),
+};
+
+
+const uint16_t PROGMEM fn_actions[] = {
+    ACTION_FUNCTION(LFK_CLEAR),                               // FN0 - reset layers
+    ACTION_FUNCTION(LFK_ESC_TILDE),                           // FN1 - esc+shift = ~, else escape
+    ACTION_FUNCTION(LFK_LED_TEST),                            // FN2 - cycle through LEDs for testing
+    ACTION_FUNCTION_OPT(LFK_SET_DEFAULT_LAYER, VANILLA),      // FN3 - set base layer to 0 and save
+    ACTION_FUNCTION_OPT(LFK_SET_DEFAULT_LAYER, DEFAULT_WKL),  // FN4 - set base layer to 1 and save
+    ACTION_FUNCTION_OPT(LFK_SET_DEFAULT_LAYER, DEFAULT_OSX),  // FN5 - set base layer to 2 and save
+    ACTION_FUNCTION(LFK_CLICK_FREQ_HIGHER),                   // FN6 - Increase Freq of audio click
+    ACTION_FUNCTION(LFK_CLICK_FREQ_LOWER),                    // FN7 - Decrease Freq of audio click
+    ACTION_FUNCTION(LFK_CLICK_TIME_LONGER),                   // FN8 - Increase length of audio click
+    ACTION_FUNCTION(LFK_CLICK_TIME_SHORTER),                  // FN9 - Decrease length of audio click
+    ACTION_FUNCTION(LFK_CLICK_TOGGLE),                        // FN10 - Toggle audio click
+    ACTION_FUNCTION(LFK_LED_TEST),                            // FN11 - cycle through LEDs for testing
+    ACTION_FUNCTION(LFK_DEBUG_SETTINGS),                      // FN12 - prints LED and click settings to HID
+    ACTION_FUNCTION(LFK_PLAY_ONEUP),
+  };
+
+
+const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
+{
+  // MACRODOWN only works in this function
+      switch(id) {
+      }
+    return MACRO_NONE;
+};
+
+
+void matrix_init_user(void) {
+
+}
+
+void matrix_scan_user(void) {
+
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  if((layer_state & (1 << CS_GO)) && (keycode == 44)){
+    if(get_mods() & (MOD_BIT(KC_LGUI))){
+      return false;
+    }
+  }
+  return true;
+}
+
+void led_set_user(uint8_t usb_led) {
+
+}
diff --git a/keyboards/lfkeyboards/lfk87/keymaps/ca178858/readme.md b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/readme.md
new file mode 100644
index 0000000000..56742f3b28
--- /dev/null
+++ b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/readme.md
@@ -0,0 +1 @@
+# The default keymap for LFK87
diff --git a/keyboards/lfkeyboards/lfk87/keymaps/ca178858/rules.mk b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/rules.mk
new file mode 100644
index 0000000000..9819cdbee2
--- /dev/null
+++ b/keyboards/lfkeyboards/lfk87/keymaps/ca178858/rules.mk
@@ -0,0 +1,53 @@
+# Build Options
+#   change to "no" to disable the options, or define them in the Makefile in
+#   the appropriate keymap folder that will get included automatically
+#
+
+BOOTMAGIC_ENABLE = no           # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no            # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes           # Audio control and System control(+450)
+CONSOLE_ENABLE = yes            # Console for debug(+400)
+COMMAND_ENABLE = yes            # Commands for debug and configuration
+NKRO_ENABLE = yes               # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = yes          # Enable keyboard backlight functionality
+MIDI_ENABLE = no                # MIDI controls
+AUDIO_ENABLE = yes              # Audio output on port C6
+UNICODE_ENABLE = no             # Unicode
+BLUETOOTH_ENABLE = no           # Disable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes           # Enable RGB underlight
+RGBLIGHT_CUSTOM_DRIVER = yes    # RGB code is implemented in lefkeyboards, not WS2812
+SLEEP_LED_ENABLE = yes          # Breathing sleep LED during USB suspend
+TAP_DANCE_ENABLE = yes
+
+ISSI_ENABLE = yes			# If the I2C pullup resistors aren't install this must be disabled
+WATCHDOG_ENABLE = yes		# Resets keyboard if matrix_scan isn't run every 250ms
+
+
+ifndef QUANTUM_DIR
+	include ../../../../Makefile
+endif
+
+ifeq ($(strip $(ISSI_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DISSI_ENABLE
+endif
+
+ifeq ($(strip $(WATCHDOG_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DWATCHDOG_ENABLE
+endif
+
+
+# # Set the LFK78 hardware version. This is defined in rules.mk, but can be overidden here if desired
+# #
+# # RevB - first public release, uses atmega32u4, has audio, ISSI matrix split between RGB and backlight
+# # RevC/D - at90usb1286, no audio, ISSI device 0 is backlight, 4 is RGB
+# #
+# # Set to B, C or D
+# LFK_REV = D
+
+# ifeq ($(LFK_REV), B)
+# 	MCU = atmega32u4
+# else
+# 	MCU = at90usb1286
+# endif
+# OPT_DEFS += -DLFK_REV_$(LFK_REV)
+# OPT_DEFS += -DUSB_PRODUCT=\"LFK_Rev$(LFK_REV)\"