[Keymap] Balance Twelve / Steno Keymap for Planck (#6283)

* New keymap. Cursor layer does not work.

* Refinements to layout over months of use.

* Changes following review.

* Changes following review.

4 files changed, 230 insertions, 0 deletions

diff --git a/keyboards/planck/keymaps/yttyx/config.h b/keyboards/planck/keymaps/yttyx/config.h
new file mode 100644
index 000000000..88d0c07e9
--- /dev/null
+++ b/keyboards/planck/keymaps/yttyx/config.h
@@ -0,0 +1,5 @@
+#pragma once
+#define NO_ACTION_ONESHOT
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+#define TAPPING_TOGGLE  2
diff --git a/keyboards/planck/keymaps/yttyx/keymap.c b/keyboards/planck/keymaps/yttyx/keymap.c
new file mode 100644
index 000000000..0fcbae892
--- /dev/null
+++ b/keyboards/planck/keymaps/yttyx/keymap.c
@@ -0,0 +1,146 @@
+
+#include QMK_KEYBOARD_H
+#include <keymap_steno.h>
+
+enum planck_layers {
+  _BA,        // Base (Balance Twelve mirror variant)
+  _PL,        // Plover (http://opensteno.org)
+  _NP,        // Numeric/punctuation
+  _FC         // Function/cursor
+};
+
+enum planck_keycodes {
+  BA  = SAFE_RANGE,
+  PL
+};
+
+
+// Abbreviations
+#define KX_SFT_Z   MT(MOD_LSFT, KC_Z)
+#define KX_SFT_X   MT(MOD_RSFT, KC_X)
+#define LT_ESC_FC  LT(_FC, KC_ESC)
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  /* BA
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | P      | L      | C      | D      | W      |        |        | U      | O      | Y      | K      | Q      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | N      | R      | S      | T      | M      |        | BS     | A      | E      | I      | H      | V      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Z Sft  | J      | F      | G      | B      |        | Ent    | ' @    | , <    | . >    | X Sft  |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Ctl    | Alt    | Sup    | NP     | Spc    | Esc/FC | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+  */                                                                                                            
+  [_BA] = LAYOUT_planck_grid( 
+    KC_P,     KC_L,    KC_C,    KC_D,    KC_W,   XXXXXXX,   XXXXXXX, KC_U,    KC_O,    KC_Y,    KC_K,     KC_Q,
+    KC_N,     KC_R,    KC_S,    KC_T,    KC_M,   XXXXXXX,   KC_BSPC, KC_A,    KC_E,    KC_I,    KC_H,     KC_V,
+    KX_SFT_Z, KC_J,    KC_F,    KC_G,    KC_B,   XXXXXXX,   KC_ENT,  KC_QUOT, KC_COMM, KC_DOT,  KX_SFT_X, XXXXXXX,
+    KC_LCTL,  KC_LALT, KC_LGUI, MO(_NP), KC_SPC, LT_ESC_FC, KC_LSFT, KC_LSFT, KC_LGUI, KC_LALT, KC_LCTL,  XXXXXXX
+  ),
+
+  /* Plover
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | #      | #      | #      | #      | #      | BA     | #      | #      | #      | #      | #      | #      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | S      | T      | P      | H      | *      |        | *      | F      | P      | L      | T      | D      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | S      | K      | W      | R      | *      |        | *      | R      | B      | G      | S      | Z      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    |        |        |        | A      | O      |        | E      | U      |        |        |        |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+  */
+  [_PL] = LAYOUT_planck_grid(
+    STN_NUM, STN_NUM, STN_NUM, STN_NUM, STN_NUM, BA,      STN_NUM, STN_NUM, STN_NUM, STN_NUM, STN_NUM, STN_NUM,
+    STN_S1,  STN_TL,  STN_PL,  STN_HL,  STN_ST1, XXXXXXX, STN_ST1, STN_FR,  STN_PR,  STN_LR,  STN_TR,  STN_DR,
+    STN_S2,  STN_KL,  STN_WL,  STN_RL,  STN_ST2, XXXXXXX, STN_ST2, STN_RR,  STN_BR,  STN_GR,  STN_SR,  STN_ZR,
+    XXXXXXX, XXXXXXX, XXXXXXX, STN_A,   STN_O,   XXXXXXX, STN_E,   STN_U,   XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX
+  ),
+
+  /* Numeric/punctuation
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | 1 !    | 2 "    | 3 £    | 4 $    | 5 %    | PL     |        | 6 ^    | 7 &    | 8 *    | 9 (    | 0 )    |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Tab    | Ctl-X  | Ctl-C  | Ctl-V  | Ctl-Z  |        | BS     | [ {    | ] }    | - _    | ; :    | \ |    |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Sft    |        |        | Del    | Ins    |        |        | / ?    | = +    | # ~    | `      |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Ctl    | Alt    | Sup    | NP     | Spc    |        | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+  */                                           
+  [_NP] = LAYOUT_planck_grid(
+    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    PL,      XXXXXXX, KC_6,    KC_7,    KC_8,    KC_9,    KC_0,
+    KC_TAB,  C(KC_X), C(KC_C), C(KC_V), C(KC_Z), XXXXXXX, _______, KC_LBRC, KC_RBRC, KC_MINS, KC_SCLN, KC_NUBS,
+    KC_LSFT, XXXXXXX, XXXXXXX, KC_DEL,  KC_INS,  XXXXXXX, XXXXXXX, KC_SLSH, KC_EQL,  KC_NUHS, KC_GRV,  XXXXXXX, 
+    _______, _______, _______, _______, _______, XXXXXXX, _______, _______, _______, _______, _______, XXXXXXX
+  ),
+
+  /* Function/cursor
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | F1     | F2     | F3     | F4     | F5     |        |        | Home   | Up     | End    | PgUp   |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | F6     | F7     | F8     | F9     | F10    |        |        | Left   | Down   | Right  | PgDn   |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Sft    |        |        | F11    | F12    |        |        | PScr   | Break  | ScLk   | Caps   |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Ctl    | Alt    | Sup    |        | Spc    |        | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+  */                                                                                                            
+  [_FC] = LAYOUT_planck_grid(
+    KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   XXXXXXX, XXXXXXX, KC_HOME, KC_UP,   KC_END,  KC_PGUP, XXXXXXX,
+    KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  XXXXXXX, XXXXXXX, KC_LEFT, KC_DOWN, KC_RGHT, KC_PGDN, XXXXXXX,
+    _______, XXXXXXX, XXXXXXX, KC_F11,  KC_F12,  XXXXXXX, XXXXXXX, KC_PSCR, KC_BRK,  KC_SLCK, KC_CAPS, XXXXXXX,
+    _______, _______, _______, XXXXXXX, _______, _______, _______, _______, _______, _______, _______, XXXXXXX
+  )
+
+};
+
+
+#ifdef AUDIO_ENABLE
+  float plover_on[][2]   = SONG(PLOVER_SOUND);
+  float plover_off[][2]  = SONG(PLOVER_GOODBYE_SOUND);
+#endif
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case PL:
+      if (record->event.pressed) {
+        #ifdef AUDIO_ENABLE
+          stop_all_notes();
+          PLAY_SONG(plover_on);
+        #endif
+        
+        layer_off(_NP);
+        layer_off(_FC);
+        layer_on(_PL);
+
+        if (!eeconfig_is_enabled()) {
+            eeconfig_init();
+        }
+        
+        keymap_config.raw = eeconfig_read_keymap();
+        keymap_config.nkro = 1;
+        eeconfig_update_keymap(keymap_config.raw);
+      }
+      return false;
+    case BA:
+      if (record->event.pressed) {
+        #ifdef AUDIO_ENABLE
+          PLAY_SONG(plover_off);
+        #endif
+       
+        layer_off(_NP);
+        layer_off(_PL);
+        layer_off(_FC);
+      }
+      return false;
+    }
+    return true;
+}
+
+void matrix_init_user() {
+  steno_set_mode(STENO_MODE_GEMINI);
+}
+
diff --git a/keyboards/planck/keymaps/yttyx/readme.md b/keyboards/planck/keymaps/yttyx/readme.md
new file mode 100644
index 000000000..6661c3170
--- /dev/null
+++ b/keyboards/planck/keymaps/yttyx/readme.md
@@ -0,0 +1,68 @@
+# Overview
+
+* Base layer uses the Balance Twelve layout ([reference](https://mathematicalmulticore.wordpress.com/the-keyboard-layout-project/))
+* Plover layer uses the same home position as the base layer ([reference](http://www.openstenoproject.org/))
+
+## To build
+
+```
+make planck/rev6:yttyx
+```
+
+## To build and flash
+
+```
+make planck/rev6:yttyx:dfu-util
+```
+
+## Layers
+
+### Base
+
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | P      | L      | C      | D      | W      |        |        | U      | O      | Y      | K      | Q      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | N      | R      | S      | T      | M      |        | BS     | A      | E      | I      | H      | V      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Z Sft  | J      | F      | G      | B      |        | Ent    | ' @    | , <    | . >    | X Sft  |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Ctl    | Alt    | Sup    | NP     | Spc    | Esc/FC | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+
+### Plover
+
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | #      | #      | #      | #      | #      | BA     | #      | #      | #      | #      | #      | #      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | S      | T      | P      | H      | *      |        | *      | F      | P      | L      | T      | D      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | S      | K      | W      | R      | *      |        | *      | R      | B      | G      | S      | Z      |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    |        |        |        | A      | O      |        | E      | U      |        |        |        |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+
+### Numeric/Punctuation
+
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | 1 !    | 2 "    | 3 £    | 4 $    | 5 %    | PL     |        | 6 ^    | 7 &    | 8 *    | 9 (    | 0 )    |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Tab    | Ctl-X  | Ctl-C  | Ctl-V  | Ctl-Z  |        | BS     | [ {    | ] }    | - _    | ; :    | \ |    |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Sft    |        |        | Del    | Ins    |        |        | / ?    | = +    | # ~    | `      |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Ctl    | Alt    | Sup    | NP     | Spc    |        | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+
+### Function
+
+    .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+    | F1     | F2     | F3     | F4     | F5     |        |        | Home   | Up     | End    | PgUp   |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | F6     | F7     | F8     | F9     | F10    |        |        | Left   | Down   | Right  | PgDn   |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Sft    |        |        | F11    | F12    |        |        | PScr   | Break  | ScLk   | Caps   |        |
+    |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+    | Ctl    | Alt    | Sup    |        | Spc    |        | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+    '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+
+
diff --git a/keyboards/planck/keymaps/yttyx/rules.mk b/keyboards/planck/keymaps/yttyx/rules.mk
new file mode 100644
index 000000000..27dac6d4d
--- /dev/null
+++ b/keyboards/planck/keymaps/yttyx/rules.mk
@@ -0,0 +1,11 @@
+# Build Options
+AUDIO_ENABLE = yes
+CONSOLE_ENABLE = no
+EXTRAKEY_ENABLE = no
+MIDI_ENABLE = no
+MOUSEKEY_ENABLE = no
+NKRO_ENABLE = yes
+RGBLIGHT_ENABLE = no
+STENO_ENABLE = yes
+VIRTSER_ENABLE = yes
+