Add German programming layout for Lets Split (#8014)

* Add German programming layout for Lets Split

* Update copyright in config.h

* Add Hash-Symbol to keymap

* Change to fit suggestions in PR

* Changes as requested, but broken.

* Fix layer switching issue

4 files changed, 182 insertions, 0 deletions

diff --git a/keyboards/lets_split/keymaps/DE_programming/config.h b/keyboards/lets_split/keymaps/DE_programming/config.h
new file mode 100644
index 0000000000..145be14226
--- /dev/null
+++ b/keyboards/lets_split/keymaps/DE_programming/config.h
@@ -0,0 +1,28 @@
+/*
+This is the c configuration file for the keymap
+
+Copyright 2020 Mose Schmiedel <mose.schmiedel@web.de>
+
+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
+
+/* Use I2C or Serial, not both */
+#define USE_SERIAL
+// #define USE_I2C
+
+/* Select hand configuration */
+#define MASTER_LEFT
+// #define MASTER_RIGHT
+// #define EE_HANDS
diff --git a/keyboards/lets_split/keymaps/DE_programming/keymap.c b/keyboards/lets_split/keymaps/DE_programming/keymap.c
new file mode 100644
index 0000000000..32231f8831
--- /dev/null
+++ b/keyboards/lets_split/keymaps/DE_programming/keymap.c
@@ -0,0 +1,97 @@
+#include QMK_KEYBOARD_H
+#include "keymap_german.h"
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+enum layers {
+  _QWERTZ,
+  _LOWER,
+  _RAISE,
+  _ADJUST,
+};
+
+#define LOWER MO(_LOWER)
+#define RAISE MO(_RAISE)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+/* Qwertz
+ * ,-----------------------------------------------------------------------------------.
+ * | Tab  |   Q  |   W  |   E  |   R  |   T  |   Z  |   U  |   I  |   O  |   P  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Esc  |   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   +  |Enter |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   Y  |   X  |   C  |   V  |   B  |   N  |   M  |   ,  |   .  |   -  |Shift |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Ctrl | GUI  | AltGr| Alt  |Lower |Space | Space| Raise| Left | Down |  Up  |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_QWERTZ] = LAYOUT( 
+   KC_TAB,    DE_Q,    DE_W,    DE_E,   DE_R,     DE_T,    DE_Z,    DE_U,    DE_I,    DE_O,    DE_P, KC_BSPC,
+   KC_ESC,    DE_A,    DE_S,    DE_D,    DE_F,    DE_G,    DE_H,    DE_J,    DE_K,    DE_L, DE_PLUS,  KC_ENT,
+  KC_LSFT,    DE_Y,    DE_X,    DE_C,    DE_V,    DE_B,    DE_N,    DE_M, DE_COMM,  DE_DOT, DE_MINS, KC_RSFT,
+  KC_LCTL, KC_LGUI, KC_ALGR, KC_LALT,   LOWER,  KC_SPC,  KC_SPC,   RAISE, KC_LEFT, KC_DOWN,   KC_UP, KC_RGHT
+),
+
+/* Lower
+ * ,-----------------------------------------------------------------------------------.
+ * |   °  |   !  |   ?  |   §  |   €  |   ~  |   $  |   (  |   )  |   <  |   >  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Del  | Vol+ | Prev | Next | Play |   &  |   @  |   {  |   }  |   [  |   ]  |Enter |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift| Vol- |      |      |      |   |  |   %  |   /  |   \  |   '  |   "  |Shift |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Ctrl |      |      |      |Lower |             | Raise|   =  |   *  |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_LOWER] = LAYOUT( 
+  DE_CIRC, DE_EXLM,  DE_QST, DE_PARA, DE_EURO,  DE_TILD,  DE_DLR, DE_LPRN, DE_RPRN, DE_LESS, DE_MORE, KC_BSPC,
+   KC_DEL, KC_VOLU, KC_MPRV, KC_MNXT, KC_MPLY,  DE_AMPR,   DE_AT, DE_LCBR, DE_RCBR, DE_LBRC, DE_RBRC,  KC_ENT,
+  KC_LSFT, KC_VOLD, _______, _______, _______,  DE_PIPE, DE_PERC, DE_SLSH, DE_BSLS, DE_QUOT, DE_DQOT, KC_RSFT,
+  KC_LCTL, _______, _______, _______, _______,  _______, _______, _______,  DE_EQL, DE_ASTR, _______, _______ 
+),
+
+/* Raise
+ * ,-----------------------------------------------------------------------------------.
+ * |   /  |   7  |   8  |   9  |   *  |      |      |      |   #  |  Alt |   `  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Del  |   4  |   5  |   6  |   -  | Pos1 |  End |   ä  |   ö  |   ü  |   ß  |Enter |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   1  |   2  |   3  |   +  |PageUp|PageDn|      |      |      |      |Shift |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |   .  |  0   |   =  |Lower |             | Raise|      |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_RAISE] = LAYOUT( 
+  DE_SLSH,    KC_7,    KC_8,    KC_9, DE_ASTR, _______, _______, _______, DE_HASH, KC_LALT, DE_ACUT, KC_BSPC,
+   KC_DEL,    KC_4,    KC_5,    KC_6, DE_MINS, KC_HOME,  KC_END,   DE_AE,   DE_OE,   DE_UE,   DE_SS,  KC_ENT,
+  KC_LSFT,    KC_1,    KC_2,    KC_3, DE_PLUS, KC_PGUP, KC_PGDN, _______, _______, _______, _______, KC_LSFT,
+  _______,  DE_DOT,    KC_0,  DE_EQL, _______, _______, _______, _______, _______, _______, _______, _______
+),
+
+/* Adjust (Lower + Raise)
+ * ,-----------------------------------------------------------------------------------.
+ * |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |  F13 |  F14 |  F15 |  F16 |  F17 |  F18 |  F19 |  F20 |  F21 |  F22 |  F23 |  F24 |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |      |      |Aud on|Audoff|AGnorm|AGswap|      |      |      |      |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      |      |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_ADJUST] =  LAYOUT( 
+    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_F16,  KC_F17,  KC_F18,  KC_F19,  KC_F20,  KC_F21,  KC_F22,  KC_F23,  KC_F24,
+  _______, _______, _______,   AU_ON,  AU_OFF, AG_NORM, AG_SWAP, _______, _______, _______, _______, _______,
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+)
+
+
+};
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+  return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+}
diff --git a/keyboards/lets_split/keymaps/DE_programming/readme.md b/keyboards/lets_split/keymaps/DE_programming/readme.md
new file mode 100644
index 0000000000..38e54609b0
--- /dev/null
+++ b/keyboards/lets_split/keymaps/DE_programming/readme.md
@@ -0,0 +1,57 @@
+De_Programming Keymap
+======
+
+Features
+--------
+
+Changed Keymap to resemble German Layout. Optimized for Programming
+
+Layout 
+--------
+
+    Qwertz
+    ,-----------------------------------------------------------------------------------.
+    | Tab  |   Q  |   W  |   E  |   R  |   T  |   Z  |   U  |   I  |   O  |   P  | Bksp |
+    |------+------+------+------+------+-------------+------+------+------+------+------|
+    | Esc  |   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   +  |Enter |
+    |------+------+------+------+------+------|------+------+------+------+------+------|
+    | Shift|   Y  |   X  |   C  |   V  |   B  |   N  |   M  |   ,  |   .  |   -  |Shift |
+    |------+------+------+------+------+------+------+------+------+------+------+------|
+    | Ctrl | GUI  | AltGr| Alt  |Lower |Space |Space |Raise | Left | Down |  Up  |Right |
+    `-----------------------------------------------------------------------------------'
+    
+    
+    Lower
+    ,-----------------------------------------------------------------------------------.
+    |   °  |   !  |   ?  |   §  |   €  |   ~  |   $  |   (  |   )  |   <  |   >  | Bksp |
+    |------+------+------+------+------+-------------+------+------+------+------+------|
+    | Del  |  F1  |  F2  |  F3  |  F4  |   &  |   @  |   {  |   }  |   [  |   ]  |Enter |
+    |------+------+------+------+------+------|------+------+------+------+------+------|
+    | Shift|  F5  |  F6  |  F7  |  F8  |   |  |   %  |   /  |   \  |   '  |   "  |Shift |
+    |------+------+------+------+------+------+------+------+------+------+------+------|
+    | Ctrl |  F9  | F10  |  F11 |  F12 |             | Prev | Next | Vol- | Vol+ | Play |
+    `-----------------------------------------------------------------------------------'
+    
+    
+    Raise
+    ,-----------------------------------------------------------------------------------.
+    |   /  |   7  |   8  |   9  |   *  |      |      |      |   #  |  Alt |   `  | Bksp |
+    |------+------+------+------+------+-------------+------+------+------+------+------|
+    | Del  |   4  |   5  |   6  |   -  | Pos1 |  End |   ä  |   ö  |   ü  |   ß  |Enter |
+    |------+------+------+------+------+------|------+------+------+------+------+------|
+    | Shift|   1  |   2  |   3  |   +  |PageUp|PageDn|      |      |      |      |Shift |
+    |------+------+------+------+------+------+------+------+------+------+------+------|
+    |      |   .  |  0   |   =  | Enter|             | Prev | Next | Vol- | Vol+ | Play |
+    `-----------------------------------------------------------------------------------'
+    
+    
+    Adjust (Lower + Raise)
+    ,-----------------------------------------------------------------------------------.
+    |  F13 |  F14 |  F15 |  F16 |  F17 |  F18 |  F19 |  F20 |  F21 |  F22 |  F23 |  F24 |
+    |------+------+------+------+------+-------------+------+------+------+------+------|
+    |      |      |      |Aud on|Audoff|AGnorm|AGswap|Qwertz|      |      |      |      |
+    |------+------+------+------+------+------|------+------+------+------+------+------|
+    |      |      |      |      |      |      |      |      |      |      |      |      |
+    |------+------+------+------+------+------+------+------+------+------+------+------|
+    |      |      |      |      |      |             |      |      |      |      |      |
+    `-----------------------------------------------------------------------------------'
diff --git a/keyboards/lets_split/keymaps/DE_programming/rules.mk b/keyboards/lets_split/keymaps/DE_programming/rules.mk
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/keyboards/lets_split/keymaps/DE_programming/rules.mk