[Keymap] Add Neo2-based keymap for Planck keyboard (qmk#19173)

Co-authored-by: christian <christian.lueke@sonoware.de>

layouts/community/ortho_4x12/neo2marin/config.h

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+/* Copyright 2018-2022 TheAmarin (@theamarin)
+ *
+ * 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
+
+// Tune the tapping term for dual-use `y`/`MOD3` key
+#define TAPPING_TERM 150
+
+#define NO_ACTION_ONESHOT
+#define NO_MUSIC_MODE

layouts/community/ortho_4x12/neo2marin/keymap.c

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+/* Copyright 2018-2022 TheAmarin (@theamarin)
+ *
+ * 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 "keymap_german.h"
+
+enum custom_keycodes {
+  NEO2 = SAFE_RANGE,
+  QWERTZ,
+};
+
+enum custom_layers {
+  L_NEO,    // NEO2
+  L_QWZ,    // QWERTZ
+  L_COD,    // NEO2 Layer 3 (Coding layer using right MOD3)
+  L_COD_AT, // NEO2 Layer 3 (Coding layer using left MOD3, with @)
+  L_MOV,    // NEO2 Layer 4 (Movements)
+  L_FUN,    // Function and media keys
+};
+
+#define MCOD MO(L_COD)
+#define MCODAT MO(L_COD_AT)
+#define MMOV MO(L_MOV)
+#define MFUN MO(L_FUN)
+#define YMCOD LT(L_COD, DE_Y)
+#define AEMCOD MT(DE_HASH, DE_ADIA)
+#define RALTF LM(L_FUN, MOD_RALT)
+
+#define LALTTAB LALT(KC_TAB)
+#define RALTTAB RALT(KC_TAB)
+#define ME_MAXM LCTL(LGUI(KC_UP))
+
+#if defined(SWAP_HANDS_ENABLE)
+#define SWAPH SH_MON
+#else
+#define SWAPH KC_TRNS
+#endif
+
+#define ____ KC_TRNS
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [L_NEO] = LAYOUT_ortho_4x12(
+  //,-------+-------+-------+-------+-------+-------.    ,-------+-------+-------+-------+-------+-------.
+     KC_TAB , DE_X  , DE_V  , DE_L  , DE_C  , DE_W  ,      DE_K  , DE_H  , DE_G  , DE_F  , DE_Q  , DE_SS ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+     MCODAT , DE_U  , DE_I  , DE_A  , DE_E  , DE_O  ,      DE_S  , DE_N  , DE_R  , DE_T  , DE_D  , YMCOD ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+     KC_LSFT,DE_UDIA,DE_ODIA,DE_ADIA, DE_P  , DE_Z  ,      DE_B  , DE_M  ,DE_COMM, DE_DOT, DE_J  ,KC_RSFT,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+     KC_LCTL,KC_LGUI,KC_LALT, SWAPH , MFUN  , MMOV  ,    KC_SPACE, SWAPH , MFUN  , KC_APP, RALTF ,KC_RCTL
+  //`-------+-------+-------+-------+-------+-------'    `-------+-------+-------+-------+-------+-------'
+  ),
+
+  [L_QWZ] = LAYOUT_ortho_4x12(
+  //,-------+-------+-------+-------+-------+-------.    ,-------+-------+-------+-------+-------+-------.
+     KC_TAB , DE_Q  , DE_W  , DE_E  , DE_R  , DE_T  ,      DE_Z  , DE_U  , DE_I  , DE_O  , DE_P  ,DE_UDIA,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+     KC_CAPS, DE_A  , DE_S  , DE_D  , DE_F  , DE_G  ,      DE_H  , DE_J  , DE_K  , DE_L  ,DE_ODIA,AEMCOD ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+     KC_LSFT, DE_Y  , DE_X  , DE_C  , DE_V  , DE_B  ,      DE_N  , DE_M  ,DE_COMM, DE_DOT, DE_SS ,KC_RSFT,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+     KC_LCTL,KC_LGUI,KC_LALT, ____  , MFUN  , MMOV  ,    KC_SPACE, ____  ,KC_RALT,KC_APP , RALTF ,KC_RCTL
+  //`-------+-------+-------+-------+-------+-------'    `-------+-------+-------+-------+-------+-------'
+  ),
+
+  [L_COD] = LAYOUT_ortho_4x12(
+  //,-------+-------+-------+-------+-------+-------.    ,-------+-------+-------+-------+-------+-------.
+     DE_ACUT,DE_EURO,DE_UNDS,DE_LBRC,DE_RBRC,DE_CIRC,     DE_EXLM,DE_LABK,DE_RABK,DE_EQL, DE_AMPR, DE_GRV,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  ,DE_BSLS,DE_SLSH,DE_LCBR,DE_RCBR,DE_ASTR,     DE_QUES,DE_LPRN,DE_RPRN,DE_MINS,DE_COLN, ____  ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  ,DE_HASH, DE_DLR,DE_PIPE,DE_TILD,DE_ACUT,     DE_PLUS,DE_PERC,DE_DQUO,DE_QUOT,DE_SCLN, ____  ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  , ____  , ____  , ____  , ____  , ____  ,      ____  , ____  , ____  , ____  , ____  , ____
+  //`-------+-------+-------+-------+-------+-------'    `-------+-------+-------+-------+-------+-------'
+  ),
+
+  [L_COD_AT] = LAYOUT_ortho_4x12(
+  //,-------+-------+-------+-------+-------+-------.    ,-------+-------+-------+-------+-------+-------.
+     DE_ACUT,DE_EURO,DE_UNDS,DE_LBRC,DE_RBRC,DE_CIRC,     DE_EXLM,DE_LABK,DE_RABK,DE_EQL, DE_AMPR, DE_GRV,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  ,DE_BSLS,DE_SLSH,DE_LCBR,DE_RCBR,DE_ASTR,     DE_QUES,DE_LPRN,DE_RPRN,DE_MINS,DE_COLN, DE_AT ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  ,DE_HASH, DE_DLR,DE_PIPE,DE_TILD,DE_ACUT,     DE_PLUS,DE_PERC,DE_DQUO,DE_QUOT,DE_SCLN, ____  ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  , ____  , ____  , ____  , ____  , ____  ,      ____  , ____  , ____  , ____  , ____  , ____
+  //`-------+-------+-------+-------+-------+-------'    `-------+-------+-------+-------+-------+-------'
+  ),
+
+  [L_MOV] = LAYOUT_ortho_4x12(
+  //,-------+-------+-------+-------+-------+-------.    ,-------+-------+-------+-------+-------+-------.
+      ____  ,KC_PGUP,KC_BSPC, KC_UP ,KC_DEL, KC_PGDN,      ____  , KC_7  , KC_8  , KC_9  ,DE_PLUS,DE_MINS,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  ,KC_HOME,KC_LEFT,KC_DOWN,KC_RGHT,KC_END ,      ____  , KC_4  , KC_5  , KC_6  ,DE_COMM, DE_DOT,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  ,KC_ESC ,KC_TAB ,KC_INS, KC_ENTER,____  ,      KC_0  , KC_1  , KC_2  , KC_3  ,DE_SCLN, ____  ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  , ____  , ____  , ____  , ____  , ____  ,      ____  , KC_0  , ____  , ____  , ____  , ____ 
+  //`-------+-------+-------+-------+-------+-------'    `-------+-------+-------+-------+-------+-------'
+  ),
+
+  [L_FUN] = LAYOUT_ortho_4x12(
+  //,-------+-------+-------+-------+-------+-------.    ,-------+-------+-------+-------+-------+-------.
+      ____  , AU_ON ,KC_VOLD,ME_MAXM,KC_VOLU, ____  ,     DM_REC1, KC_F7 , KC_F8 , KC_F9 , KC_F12,KC_PSCR,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  ,KC_MSTP,KC_MPRV,KC_MPLY,KC_MNXT, NEO2  ,     DM_RSTP, KC_F4 , KC_F5 , KC_F6 , KC_F11,KC_BRK ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  , AU_OFF,KC_TAB ,KC_INS ,KC_ENTER,QWERTZ,     DM_PLY1, KC_F1 , KC_F2 , KC_F3 , KC_F10, ____  ,
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+      ____  , ____  , ____  , ____  , ____  , ____  ,      ____  , ____  , ____  , ____  , ____  , ____
+  //|-------+-------+-------+-------+-------+-------|    |-------+-------+-------+-------+-------+-------|
+  ),
+
+};
+
+#if defined(AUDIO_ENABLE)
+float SONG_QWERTZ[][2] = SONG(QWERTY_SOUND);
+float SONG_NEO2[][2]   = SONG(DVORAK_SOUND);
+#endif
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case QWERTZ:
+      if (record->event.pressed) {
+        default_layer_set(1UL<<L_QWZ);
+        #if defined(AUDIO_ENABLE)
+          PLAY_SONG(SONG_QWERTZ);
+        #endif
+      }
+      return false;
+
+    case NEO2:
+      if (record->event.pressed) {
+        default_layer_set(1UL<<L_NEO);
+        #if defined(AUDIO_ENABLE)
+          PLAY_SONG(SONG_NEO2);
+        #endif
+      }
+      return false;
+  }
+  return true;
+}
+
+#if defined(BACKLIGHT_ENABLE)
+layer_state_t layer_state_set_user(layer_state_t state) {
+  switch (get_highest_layer(state)) {
+  case L_COD:
+  case L_COD_AT:
+      backlight_set(1);
+      break;
+    case L_MOV:
+      backlight_set(3);
+      break;
+    default:
+      backlight_set(0);
+      break;
+  }
+  return state;
+}
+#endif

layouts/community/ortho_4x12/neo2marin/readme.md

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+TheAmarin's Neo2-based Layout
+================================
+
+This layout is based on [Neo2](https://www.neo-layout.org/), an ergonomic keyboard layout optimized for coding and German language.
+**neo2marin** tries to squeeze Neo2 onto the Planck keyboard.
+
+Neo2 already uses several layers with multiple modifiers, so we don't have to invent new layers.
+A major difficulty is the missing 'hashtag' key which is usually left to the 'return' key on German QWERTZ keyboards.
+
+Another astonishing thing might be that `return`/`enter` needs a modifier (`MOD4`+`P`).
+
+This layout makes heavy use of the split `space` key, as its left part becomes the quite important `MOD4` modifier.
+
+
+## The Neo2 Main Layer
+
+```
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|TAB | X  | V  | L  | C  | W  |    | K  | H  | G  | F  | Q  | SS   |
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|MOD3| U  | I  | A  | E  | O  |    | S  | N  | R  | T  | D  |Y/MOD3|
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|LSFT| Ü  | Ö  | Ä  | P  | Z  |    | B  | M  | ,  | .  | J  |RSFT  |
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|LCTL|LGUI|LALT|SWAP|MOD5|MOD4|    |SPC |SWAP|MOD5|APP |RALT|RCTL  |
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+```
+
+Unfortunately, `y` and `MOD3` (switch to layer 3) need to share a single key.
+This works for me most of the time but I am happy [to learn about your solution](https://github.com/theamarin/qmk_firmware/issues)!
+
+
+## The QWERTZ fallback layer
+
+I nearly never use this layer, so there may be room for optimization.
+
+```
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|TAB | Q  | W  | E  | R  | T  |    | Z  | U  | I  | O  | P  | Ü    |
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|CAPS| A  | S  | D  | F  | G  |    | H  | J  | K  | L  | Ö  |Ä/MOD3|
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|LSFT| Y  | X  | C  | V  | B  |    | N  | M  | ,  | .  | SS |RSFT  |
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+|LCTL|LGUI|LALT|SWAP|MOD5|MOD4|    |SPC |SWAP|RALT|APP |RALT|RCTL  |
+|----+----+----+----+----+----|    |----+----+----+----+----+------|
+```
+
+The German `ß` has moved right to the `.` key, and we have to reuse `Ä` for `MOD3` again.
+
+
+## MOD3: The Coding Layer
+
+This is definitively the coolest part of Neo2, having most of the coding-related symbols right on your home row!
+Of course, this is the only way to do it on Planck.
+
+```
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|'   | €  | _  | [  | ]  | ^  |    | !  | <  | >  | =  | &  | `  |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|MOD3, \  | /  | {  | }  | *  |    | ?  | (  | )  | -  | :  | @  |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|LSFT, #  | $  | |  | ~  | '  |    | +  | %  | "  | '  | ;  |RSFT|
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|LCTL|LGUI|LALT|SWAP|MOD5|MOD4|    |SPC |SWAP|MOD5|APP |RALT|RCTL|
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+```
+
+Because `y` and `MOD3` have to share a key, we need two variants of the MOD3 layer (as can be seen in the keymap).
+
+
+
+## MOD4: The Movements Layer
+
+```
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |PGUP|BSPC| UP |DEL |PGDN|    |    | 7  | 8  | 9  | +  | -  |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |HOME|LEFT|DOWN|RGHT|END |    |    | 4  | 5  | 6  | ,  | .  |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |ESC |TAB |INS |ENTR|    |    | 0  | 1  | 2  | 3  | ;  |    |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |    |    |    |    |    |    |    | 0  |    |    |    |    |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+```
+
+
+## MOD5: The Fun(ctions) Layer
+
+```
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |AUD1|VOLD|MAXM|VOLU|    |    |M1R | F7 | F8 | F9 |F12 |PSCR|
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |MSTP|MPRV|MPLY|MNXT|NEO2|    |M1S | F4 | F5 | F6 |F11 |BRK |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |AUD0|TAB |INS |ENTR|QWERTZ   |M1P | F1 | F2 | F3 |F10 |    |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+|    |    |    |    |    |    |    |    |    |    |    |    |    |
+|----+----+----+----+----+----|    |----+----+----+----+----+----|
+```
+
+
+Have fun!
+
+[Your feedback is appreciated](https://github.com/theamarin/qmk_firmware/issues)!

layouts/community/ortho_4x12/neo2marin/rules.mk

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+DYNAMIC_MACRO_ENABLE = yes
+
+ifeq ($(strip $(KEYBOARD)), planck/rev5)
+	AUDIO_ENABLE = yes
+	BACKLIGHT_ENABLE = yes
+endif