[Keymap] bcat keymaps and userspace (#10705)

Add Eco keymap, factor Crkbd keymap to community layout, other minor tweaks

* Remove outdated Crkbd Ctrl key positioning info

* Add Left Alt key to Lily58 keymap

* Lily58 no longer overrides default TAPPING_TERM

* Refactor Crkbd keymap to use new community layout

* Fix underglow animations for Crkbd w/ Split Common

* Add initial Eco keymap

* Update outdated reference to Crkbd layout

* Add keymap links to userspace readme

* Add copyright notices to files changed in this PR

4 files changed, 242 insertions, 0 deletions

diff --git a/layouts/community/split_3x6_3/bcat/config.h b/layouts/community/split_3x6_3/bcat/config.h
new file mode 100644
index 000000000..e177f0ffc
--- /dev/null
+++ b/layouts/community/split_3x6_3/bcat/config.h
@@ -0,0 +1,34 @@
+/* Copyright 2020 Jonathan Rascher
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#if defined(KEYBOARD_crkbd_rev1_common) || defined(KEYBOARD_crkbd_rev1_legacy)
+#    define EE_HANDS
+
+#    if defined(RGBLIGHT_ENABLE)
+/* Configure RGB for underglow only (first six LEDs on each side). */
+#        undef RGBLED_SPLIT
+#        define RGBLED_SPLIT \
+            { 6, 6 }
+#    endif
+
+#    if defined(RGB_MATRIX_ENABLE)
+/* Limit max RGB LED current to avoid tripping controller fuse. */
+#        undef RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#        define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150
+#    endif
+#endif
diff --git a/layouts/community/split_3x6_3/bcat/keymap.c b/layouts/community/split_3x6_3/bcat/keymap.c
new file mode 100644
index 000000000..934a8e31f
--- /dev/null
+++ b/layouts/community/split_3x6_3/bcat/keymap.c
@@ -0,0 +1,72 @@
+/* Copyright 2020 Jonathan Rascher
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include QMK_KEYBOARD_H
+
+#include "bcat.h"
+
+enum layer {
+    LAYER_DEFAULT,
+    LAYER_LOWER,
+    LAYER_RAISE,
+    LAYER_ADJUST,
+};
+
+#define LY_LWR MO(LAYER_LOWER)
+#define LY_RSE MO(LAYER_RAISE)
+
+#define KY_CSPC LCTL(KC_SPC)
+#define KY_ZMIN LCTL(KC_EQL)
+#define KY_ZMOUT LCTL(KC_MINS)
+#define KY_ZMRST LCTL(KC_0)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Default layer: http://www.keyboard-layout-editor.com/#/gists/08d9827d916662a9414f48805aa895a5 */
+    [LAYER_DEFAULT] = LAYOUT_split_3x6_3(
+        KC_TAB,   KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,                         KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,     KC_BSPC,
+        KC_ESC,   KC_A,     KC_S,     KC_D,     KC_F,     KC_G,                         KC_H,     KC_J,     KC_K,     KC_L,     KC_SCLN,  KC_QUOT,
+        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_LCTL,  LY_LWR,   KC_SPC,   KC_ENT,   LY_RSE,   KC_RALT
+    ),
+
+    /* Lower layer: http://www.keyboard-layout-editor.com/#/gists/c3fba5eaa2cd70fdfbdbc0f9e34d3bc0 */
+    [LAYER_LOWER] = LAYOUT_split_3x6_3(
+        MC_ALTT,  KC_EXLM,  KC_AT,    KC_HASH,  KC_DLR,   KC_PERC,                      KC_CIRC,  KC_AMPR,  KC_ASTR,  KC_LPRN,  KC_RPRN,  _______,
+        KY_CSPC,  KY_ZMRST, KY_ZMOUT, KY_ZMIN,  KC_WBAK,  KC_WFWD,                      KC_PIPE,  KC_UNDS,  KC_PLUS,  KC_LCBR,  KC_RCBR,  KC_TILD,
+        _______,  KC_APP,   KC_PSCR,  KC_SLCK,  KC_PAUS,  KC_LGUI,                      KC_BSLS,  KC_MINS,  KC_EQL,   KC_LBRC,  KC_RBRC,  KC_GRV,
+                                                _______,  _______,  _______,  _______,  _______,  _______
+    ),
+
+    /* Raise layer: http://www.keyboard-layout-editor.com/#/gists/08b44355d4ca85d294bad9e2821f91d7 */
+    [LAYER_RAISE] = LAYOUT_split_3x6_3(
+        KC_CAPS,  KC_1,     KC_2,     KC_3,     KC_4,     KC_5,                         KC_6,     KC_7,     KC_8,     KC_9,     KC_0,     _______,
+        _______,  KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,                        KC_LEFT,  KC_DOWN,  KC_UP,    KC_RGHT,  KC_F11,   KC_DEL,
+        _______,  KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,                       KC_HOME,  KC_PGDN,  KC_PGUP,  KC_END,   KC_F12,   KC_INS,
+                                                _______,  _______,  _______,  _______,  _______,  _______
+    ),
+
+    /* Adjust layer: http://www.keyboard-layout-editor.com/#/gists/77e7572e077b36a23eb2086017e16fee */
+    [LAYER_ADJUST] = LAYOUT_split_3x6_3(
+        _______,  NK_TOGG,  KC_MPLY,  KC_VOLU,  KC_MSTP,  _______,                      EEP_RST,  RESET,    _______,  _______,  _______,  _______,
+        _______,  _______,  KC_MPRV,  KC_VOLD,  KC_MNXT,  _______,                      RGB_RMOD, RGB_VAD,  RGB_VAI,  RGB_MOD,  RGB_SPI,  _______,
+        _______,  _______,  _______,  KC_MUTE,  _______,  _______,                      RGB_HUI,  RGB_SAD,  RGB_SAI,  RGB_HUD,  RGB_SPD,  _______,
+                                                _______,  _______,  _______,  RGB_TOG,  _______,  _______
+    ),
+};
+
+layer_state_t layer_state_set_keymap(layer_state_t state) {
+    return update_tri_layer_state(state, LAYER_LOWER, LAYER_RAISE, LAYER_ADJUST);
+}
diff --git a/layouts/community/split_3x6_3/bcat/readme.md b/layouts/community/split_3x6_3/bcat/readme.md
new file mode 100644
index 000000000..ed17b8418
--- /dev/null
+++ b/layouts/community/split_3x6_3/bcat/readme.md
@@ -0,0 +1,126 @@
+# bcat's split 3x6 + 3 thumb keys layout
+
+This is my favorite split ergo layout for typing, featuring the traditional
+four ortho/ergo layers (Default, Lower, Raise, Adjust). It is loosely inspired
+by the default Planck (numbers on Lower, symbols on Raise) and Crkbd (Space on
+left, Enter on right) layouts, but has since been redesigned heavily according
+to the principles described below.
+
+* Since my most-frequently-used keyboard shortcuts involve Ctrl, which lives on
+the left half of the keyboard, keys frequently used with it (numbers, function
+keys, etc.) are on the Raise layer activated by the right thumb.
+
+* Navigation can be done on the right half alone, to enable simultaneous
+left-handed mousing. Additionally, Web pages can be scrolled with Space or
+Shift+Space on the left half alone, to enable taking notes with the right hand
+at the same time.
+
+* Other than Right Shift (which I seldom use), mods aren't rebound on layers.
+
+* Likewise, Backspace is not rebound on layers to avoid having to let go of
+layer-switch keys to correct mistakes.
+
+## Default layer
+
+![Default layer layout](https://i.imgur.com/g5N7g8D.png)
+
+([KLE](http://www.keyboard-layout-editor.com/#/gists/08d9827d916662a9414f48805aa895a5))
+
+* The alpha keys are a standard QWERTY layout, no funny business there.
+
+* Tab and Backspace are in familiar locations from my row-staggered boards
+(almost all of which use HHKB-style split backspace).
+
+* The Esc key is next to the home row for convenience in Vim.
+
+* There are two Shift keys, although I generally use Left Shift. (I've
+considered replacing Right Shift with another key, but haven't chosen one.)
+
+* Lower and Raise layer-switch keys are in the resting position of my left and
+right thumbs, respectively.
+
+* Space and Enter are on the big thumb keys so they're easy to press.
+
+* Ctrl is on the left for ease of chording, especially one-handed use of common
+shortcuts like Ctrl+T and Ctrl+W. This puts Alt on the right by the process of
+elimination. (I would really like one more 1U thumb key on each half to allow
+for a redundant Alt key on the left and a dedicated Super key on the right.)
+
+## Lower layer
+
+![Lower layer layout](https://i.imgur.com/vaIc9JY.png)
+
+([KLE](http://www.keyboard-layout-editor.com/#/gists/c3fba5eaa2cd70fdfbdbc0f9e34d3bc0))
+
+* This could also be called the "symbol layer".
+
+* Shifted numbers are bound in their usual positions on the top row.
+
+* Hyphen/Underscore and Equals/Plus are in the right index- and middle-finger
+columns for easy reach. They share the same relative position as on a
+row-staggered keyboard, and the shifted versions are physically above the
+unshifted versions as a mnemonic device.
+
+* Brackets and braces are placed below the parens for easy recall. Once again,
+the shifted versions are on the home row and the unshifted versions are on the
+bottom row.
+
+* Forward Slash/Pipe and Backtick/Tilde fill out the remaining positions on the
+right half, with the same relative positions as on a row-staggered HHKB layout.
+And yup, the shifted versions are above the unshifted versions.
+
+* Remaining keys from a TKL are placed out of the way on the bottom row of the
+left half.
+
+* The home row on the left half contains handy shortcuts for zooming and browser
+navigation.
+
+* Lower+Esc is bound to Ctrl+Space because the Ctrl and Space keys are both on
+the left thumb, so this key combination (which I use for tmux prefix and editor
+autocomplete) is hard to press in its natural location.
+
+* Lower+Tab is bound to a custom Alt+Tab macro that keeps the Alt modifier held
+as long as the Lower key is held down. This means that window switching is on
+Lower+Tab immediately next to browser tab switching (Ctrl+Tab).
+
+## Raise layer
+
+![Raise layer layout](https://i.imgur.com/VNEiV9A.png)
+
+([KLE](http://www.keyboard-layout-editor.com/#/gists/08b44355d4ca85d294bad9e2821f91d7))
+
+* This could also be called the "number layer".
+
+* Unshifted numbers are bound in their usual positions on the top row.
+
+* Arrow keys are on VIM-style HJKL keys.
+
+* Home/End and Page Up/Page Down are in the same column as the arrow keys, but
+translated down one row. (This means that the comma and period keys are not
+bound on the number layer, which makes data entry a bit funky. I might add a
+dedicated numpad layer to compensate.)
+
+* Function keys F1–F10 take up most of remaining space on the left half, with
+F11 and F12 spilling over to the right half. (This puts the most used function
+keys (F1–F5) on the home row.)
+
+* Insert and Delete are on the rightmost column, because there didn't seem to
+be a better place to put them.
+
+* Caps Lock is bound in the same position as on an HHKB, for lack of an obvious
+better location.
+
+## Adjust layer
+
+![Adjust layer layout](https://i.imgur.com/fZouko5.png)
+
+([KLE](http://www.keyboard-layout-editor.com/#/gists/77e7572e077b36a23eb2086017e16fee))
+
+* Media keys are centered around the ESDF cluster, just like I arrange them on
+row-staggered keyboards. (It's even more sensible with columnar stagger.)
+
+* The navigation keys are replaced by RGB controls. Again, this mirrors the
+positioning I use on my row-staggered keyboards.
+
+* Finally, reset keys live at the top-left corner of the right half where it's
+reasonably hard to press them by accident.
diff --git a/layouts/community/split_3x6_3/bcat/rules.mk b/layouts/community/split_3x6_3/bcat/rules.mk
new file mode 100644
index 000000000..3a9796673
--- /dev/null
+++ b/layouts/community/split_3x6_3/bcat/rules.mk
@@ -0,0 +1,10 @@
+ifeq ($(strip $(KEYBOARD)), crkbd/rev1/common)
+        BOOTLOADER = atmel-dfu  # Elite-C
+
+        # Enable underglow only. (Split Common doesn't support RGB matrix on slave.)
+        RGBLIGHT_ENABLE = yes
+else ifeq ($(strip $(KEYBOARD)), crkbd/rev1/legacy)
+        BOOTLOADER = atmel-dfu  # Elite-C
+
+        RGB_MATRIX_ENABLE = WS2812  # per-key RGB and underglow
+endif