New keyboard: Cu75 (#2374)

* Added Modular keyboards L,R and NUM

Created code modules for the 3 modules of the modular keyboard.
Original idea by MechboardsUK. Uses i2c implementation similar to lets
split

* Remove modular from master

This is to fix incorrect branching

* Addition of cu75

Addition of cu75 keyboard, uses libraries from LFKeyboards directory which are path linked to reduce file duplication.

Minor fix on cu24 readme

* Minor Readme Fix

3 files changed, 152 insertions, 0 deletions

diff --git a/keyboards/cu75/keymaps/default/config.h b/keyboards/cu75/keymaps/default/config.h
new file mode 100644
index 0000000000..8893d122e0
--- /dev/null
+++ b/keyboards/cu75/keymaps/default/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/cu75/keymaps/default/keymap.c b/keyboards/cu75/keymaps/default/keymap.c
new file mode 100644
index 0000000000..dfd96fbd5a
--- /dev/null
+++ b/keyboards/cu75/keymaps/default/keymap.c
@@ -0,0 +1,91 @@
+#include "cu75.h"
+#include "action_layer.h"
+
+//Define a shorter 'transparent' key code to make the keymaps more compact
+#define KC_TR KC_TRNS
+
+enum keymap_layout {
+    VANILLA = 0,
+    FUNC,
+    SETTINGS,
+};
+
+
+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|F13|F14| F15|
+   * |------------------------------------------------------------|----|
+   * | ~  | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  0| - | = |Backspa| Ins|
+   * |------------------------------------------------------------|----|
+   * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|     \| Del|
+   * |------------------------------------------------------------|----|
+   * |CAPS    |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Return |PgUp|
+   * |------------------------------------------------------------|----|
+   * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift  |Up |PgDn|
+   * |-----------------------------------------------------------------|
+   * |Ctrl|Win |Alt |Space|  Space  |Space|Alt |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_F10, KC_F11, KC_F12, KC_F13, KC_F14, KC_F15,
+    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_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_DEL,
+    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_PGUP,
+    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_PGDN,
+    KC_LCTL, KC_LGUI, KC_LALT,KC_SPC, KC_SPC, KC_SPC,KC_RALT, KC_RCTL, MO(FUNC), KC_LEFT, KC_DOWN,  KC_RGHT),
+
+[FUNC] = KEYMAP(
+  /* Keymap VANILLA: Function Layer
+   * ,-------------------------------------------------------------------.
+   * |     |   |   |   |   |   |   |   |   |   |   |   |   |   |    |    |
+   * |-------------------------------------------------------------------|
+   * |     |   |   |   |   |   |   |   |   |   |   |   |   |       |     |
+   * |-------------------------------------------------------------------|
+   * |    |   |   |   |   |   |   |   |   |   |   |   |   |     | RGB_TOG|
+   * |-------------------------------------------------------------------|
+   * |       |   |   |   |   |   |   |   |   |   |   |   |RESET |RGB_MODE|
+   * |-------------------------------------------------------------------|
+   * |       |   |   |   |   |   |   |   |   |   |   |      |RGB_HUI|    |
+   * |-------------------------------------------------------------------|
+   * |    |    |    |               |    |   |   |RGB_SAD|RGB_HUD|RGB_SAI|
+   * `-------------------------------------------------------------------'
+   */
+    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, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,KC_TR,  RGB_TOG,
+    KC_TR,  KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR,      RESET,  RGB_MOD,
+    KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, KC_TR, RGB_VAD, RGB_VAI, KC_TR, KC_TR, RGB_HUI,  KC_TR,
+    KC_TR, KC_TR, KC_TR,   KC_TR,      KC_TR,          KC_TR, KC_TR, KC_TR, KC_TR, RGB_SAD, RGB_HUD,  RGB_SAI),
+};
+
+const uint16_t PROGMEM fn_actions[] = {
+    ACTION_FUNCTION(LFK_CLEAR),                               // FN0 - reset layers
+    ACTION_FUNCTION(LFK_ESC_TILDE),                           // FN1 - esc+shift = ~, else escape
+  };
+
+
+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) {
+  return true;
+}
+
+void led_set_user(uint8_t usb_led) {
+
+}
diff --git a/keyboards/cu75/keymaps/default/rules.mk b/keyboards/cu75/keymaps/default/rules.mk
new file mode 100644
index 0000000000..39f6eca8b0
--- /dev/null
+++ b/keyboards/cu75/keymaps/default/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 = no            # Console for debug(+400)
+COMMAND_ENABLE = no            # 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           # Disable keyboard backlight functionality
+MIDI_ENABLE = no                # MIDI controls
+AUDIO_ENABLE = no               # Audio output on port C6
+UNICODE_ENABLE = no             # Unicode
+BLUETOOTH_ENABLE = no           # Disable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes          	# Disable 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 = no
+
+ISSI_ENABLE = yes               # If the I2C pullup resistors aren't install this must be disabled
+WATCHDOG_ENABLE = no           # 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)\"