[Keyboard] Add Support for Wren Keyboard (#14570)

* initial prime_o commit

* Cleaned up comments, other things.

* Updated keymap to use standard seven-underscore KC_TRNS notation

* initial prime_o commit

* Cleaned up comments, other things.

* Updated keymap to use standard seven-underscore KC_TRNS notation

* Initial Code for Wren Keyboard

This is the initial hardware test commit for the wren. More detailed keymaps will be added soon.

* Update layout and add author

* Add PCB Image and Clarify Bootloader Instructions

* Update config.h

Updating config.h to remove mentions to LED backlighting (not supported on this PCB)

* Update wren.h to match PR checklist

* Roll back addition of code that should have been in wren.h

* Update /default/keymap.c

Make keyboard.c "pristine" to the best of my ability and add information about configuring a "non-standard" layout.

* Update readme.md

* Update keymap readmes to match PR checklist

* Update readme.md

* Final touches before PR

* Un-delete non-wren files

* Create rules.mk

* Create config.h

* Update keyboards/wren/keymaps/walterhanley/keymap.c

* Update keyboards/wren/keymaps/walterhanley/keymap.c

* Update keyboards/wren/wren.c

As per feedback, move encoder definition to wren.c from keymap.c.

* Update keyboards/wren/keymaps/walterhanley/keymap.c

As per feedback, move encoder definition to wren.c from keymap.c

* Update keyboards/wren/keymaps/default/keymap.c

As per feedback, move encoder definition to wren.c from keymap.c

* Create Keymap-Level config.h

I've been dealing with some issues with this board over-drawing power on certain devices; this should fix that issue on my build without affecting other users.

* Add bells and whistles to personal keymap

This update adds bells and whistles to my personal keymap. I couldn't figure out how to modify rotary encoder functionality for just my personal layout with the definition in wren.c, so I moved it back into the individual keymaps. Please let me know if this is an issue and I can look into possible alternative implementations.

* Update to match drashna's requested changes

* Update keymap.c

This update refines drashna's requested changes.

* Update keymap.c

Fix typo

2 files changed, 47 insertions, 0 deletions

diff --git a/keyboards/wren/keymaps/default/keymap.c b/keyboards/wren/keymaps/default/keymap.c
new file mode 100644
index 0000000000..637e0e08b8
--- /dev/null
+++ b/keyboards/wren/keymaps/default/keymap.c
@@ -0,0 +1,36 @@
+/* Copyright 2021 Walter Hanley
+ *
+ * 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
+
+// Defines names for use in layer keycodes and the keymap
+enum layer_names {
+    _BASE
+};
+
+/* This layout preserves the entire keyboard matrix, but only includes keycodes
+ * for a numpad/nav cluster configuration. Depending on your configuration, you
+ * may need to replace some of the existing KC_NO values with actual keycodes.
+ */
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Base */
+    [_BASE] = LAYOUT(
+     KC_PSLS, KC_7,    KC_8,    KC_9,    KC_EQL,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                      KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_GRV,  KC_INS,  KC_HOME, KC_PGUP, KC_NO,
+     KC_PAST, KC_4,    KC_5,    KC_6,    KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                      KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSLS, KC_DEL,  KC_END,  KC_PGDN, KC_NO,
+     KC_PMNS, KC_1,    KC_2,    KC_3,    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_NO,   KC_UP,   KC_NO,   KC_NO,
+     KC_PPLS, KC_0,    KC_DOT,  KC_ENT,  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_LEFT, KC_DOWN, KC_RGHT, KC_NO,
+                                                           KC_NLCK, KC_LALT, KC_LGUI, KC_BSPC, KC_ENT,  KC_SPC,  KC_DEL,  KC_RGUI, KC_RALT, KC_MUTE
+    )
+};
diff --git a/keyboards/wren/keymaps/default/readme.md b/keyboards/wren/keymaps/default/readme.md
new file mode 100644
index 0000000000..7227050dd4
--- /dev/null
+++ b/keyboards/wren/keymaps/default/readme.md
@@ -0,0 +1,11 @@
+![Default Layout](https://github.com/walterhanley/wren-keyboard/blob/main/images/author-layout.png?raw=true)
+
+# Default Wren Layout
+
+This is the default Wren layout, which lacks any layers. It should be fairly 
+straightforward, with the sole exception of the equals key in the place of the 
+grave key and the grave key in the place of the delete key. 
+
+This layout preserves the entire keyboard matrix, but only includes keycodes 
+for a numpad/nav cluster configuration. Depending on your configuration, you 
+may need to replace some of the existing KC_NO values with actual keycodes.