From b28fb29898efc638000c0388eb30b5fb9200ce4a Mon Sep 17 00:00:00 2001
From: Marvin Ramin <marvin.ramin@gmail.com>
Date: Mon, 13 Feb 2017 09:00:25 +0100
Subject: [PATCH] adds documentation for reset button and adds one to the
 default keymap

---
 keyboards/gonnerd/keymaps/default/keymap.c | 19 +++++---
 keyboards/gonnerd/keymaps/mauin/keymap.c   | 52 +++++++++++++++++-----
 keyboards/gonnerd/readme.md                |  4 ++
 3 files changed, 59 insertions(+), 16 deletions(-)

diff --git a/keyboards/gonnerd/keymaps/default/keymap.c b/keyboards/gonnerd/keymaps/default/keymap.c
index a3700593981..353648ecfa4 100644
--- a/keyboards/gonnerd/keymaps/default/keymap.c
+++ b/keyboards/gonnerd/keymaps/default/keymap.c
@@ -4,11 +4,20 @@
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   [0] = KEYMAP_60( /* Base */
-    KC_ESC, KC_1,   KC_2,   KC_3,   KC_4,   KC_5,   KC_6,   KC_7,   KC_8,   KC_9,   KC_0,   KC_MINS,KC_EQL, KC_BSPC,\
-    KC_TAB, KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_Y,   KC_U,   KC_I,   KC_O,   KC_P,   KC_LBRC,KC_RBRC,KC_BSLS,\
-    KC_LCTL,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_ENT, \
-    KC_LSFT,KC_NO,  KC_Z,   KC_X,   KC_C,   KC_V,   KC_B,   KC_N,   KC_M,   KC_COMM,KC_DOT, KC_SLSH,KC_RSFT,KC_NO,  \
-    KC_LCTL,KC_LGUI,KC_LALT,                        KC_SPC,                         KC_RALT,KC_RGUI,MO(1),  KC_RCTL),
+    KC_ESC, KC_1,   KC_2,   KC_3,   KC_4,   KC_5,   KC_6,   KC_7,   KC_8,   KC_9,   KC_0,   KC_MINS,KC_EQL, KC_BSPC, \
+    KC_TAB, KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_Y,   KC_U,   KC_I,   KC_O,   KC_P,   KC_LBRC,KC_RBRC,KC_BSLS, \
+    KC_LCTL,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_ENT,  \
+    KC_LSFT,KC_NO,  KC_Z,   KC_X,   KC_C,   KC_V,   KC_B,   KC_N,   KC_M,   KC_COMM,KC_DOT, KC_SLSH,KC_RSFT,KC_NO,   \
+    KC_LCTL,KC_LGUI,KC_LALT,                        KC_SPC,                         KC_RALT,KC_RGUI,MO(1),  KC_RCTL  \
+  ),
+
+  [1] = KEYMAP_60( /* System layer to have access to RESET button */
+      RESET,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,   __x__, \
+      __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,   __x__, \
+      __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,   __x__, \
+      __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,   __x__, \
+      __x__,  __x__,  __x__,                  __x__,                                  __x__,  __x__,  KC_TRNS, __x__  \
+  ),
 };
 
 const uint16_t PROGMEM fn_actions[] = {
diff --git a/keyboards/gonnerd/keymaps/mauin/keymap.c b/keyboards/gonnerd/keymaps/mauin/keymap.c
index 1a1d515a9d7..5979a7ca440 100644
--- a/keyboards/gonnerd/keymaps/mauin/keymap.c
+++ b/keyboards/gonnerd/keymaps/mauin/keymap.c
@@ -23,11 +23,11 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    * `-----------------------------------------------------------'
    */
   [BASE_LAYER] = KEYMAP_60(
-      KC_ESC,   KC_1,     KC_2,     KC_3,    KC_4,     KC_5,     KC_6,     KC_7,    KC_8,    KC_9,     KC_0,     KC_MINS,  KC_EQL,   KC_BSPC, \
+      F(0),     KC_1,     KC_2,     KC_3,    KC_4,     KC_5,     KC_6,     KC_7,    KC_8,    KC_9,     KC_0,     KC_MINS,  KC_EQL,   KC_BSPC, \
       KC_TAB,   KC_Q,     KC_W,     KC_E,    KC_R,     KC_T,     KC_Y,     KC_U,    KC_I,    KC_O,     KC_P,     KC_LBRC,  KC_RBRC,  KC_BSLS, \
-      MO(1),    KC_A,     KC_S,     KC_D,    KC_F,     KC_G,     KC_H,     KC_J,    KC_K,    KC_L,     KC_SCLN,  KC_QUOT,  __x__,    KC_ENT, \
-      KC_LSFT,  __x__,    KC_Z,     KC_X,     KC_C,    KC_V,     KC_B,     KC_N,    KC_M,    KC_COMM,  KC_DOT,   KC_SLSH,  KC_RSFT,  __x__, \
-      KC_LCTL,  KC_LALT,  KC_LGUI,                     KC_SPC,                                         KC_RGUI,  KC_RALT,  MO(3),    KC_RCTL \
+      MO(1),    KC_A,     KC_S,     KC_D,    KC_F,     KC_G,     KC_H,     KC_J,    KC_K,    KC_L,     KC_SCLN,  KC_QUOT,  __x__,    KC_ENT,  \
+      KC_LSFT,  __x__,    KC_Z,     KC_X,     KC_C,    KC_V,     KC_B,     KC_N,    KC_M,    KC_COMM,  KC_DOT,   KC_SLSH,  KC_RSFT,  __x__,   \
+      KC_LCTL,  KC_LALT,  KC_LGUI,                               KC_SPC,                               KC_RGUI,  KC_RALT,  MO(2),    KC_RCTL  \
   ),
 
   /* Layer 1: Function Layer
@@ -45,10 +45,10 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    */
    [FUNCTION_LAYER] = KEYMAP_60(
        KC_GRV,  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_DEL, \
-       __x__,   KC_MPRV, KC_MPLY, KC_MNXT, __x__,   __x__,   KC_PGUP, KC_HOME, KC_UP,   KC_END,  __x__,   KC_SLCK, KC_PAUS, __x__, \
-       KC_TRNS, KC_MUTE, KC_VOLD, KC_VOLU, __x__,   __x__,   KC_PGDN, KC_LEFT, KC_DOWN, KC_RGHT, __x__,   __x__,   __x__,   __x__, \
-       KC_LSFT,  __x__,  __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__, \
-       KC_LCTL, KC_LALT, KC_LGUI,                   KC_SPC,                                      __x__,   __x__,   __x__,   __x__ \
+       __x__,   KC_MPRV, KC_MPLY, KC_MNXT, __x__,   __x__,   KC_PGUP, KC_HOME, KC_UP,   KC_END,  __x__,   KC_SLCK, KC_PAUS, __x__,  \
+       KC_TRNS, KC_MUTE, KC_VOLD, KC_VOLU, __x__,   __x__,   KC_PGDN, KC_LEFT, KC_DOWN, KC_RGHT, __x__,   __x__,    __x__,  __x__,  \
+       KC_LSFT,  __x__,  __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,   __x__,    __x__,  __x__,  \
+       KC_LCTL, KC_LALT, KC_LGUI,                            KC_SPC,                             __x__,   __x__,   __x__,   __x__   \
    ),
 
   /* Layer 2: System Layer
@@ -69,10 +69,40 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
       __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,   __x__, \
       __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,   __x__, \
       __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,  __x__,   __x__, \
-      __x__,  __x__,  __x__,                  __x__,                                  __x__,  __x__,  KC_TRNS, __x__ \
+      __x__,  __x__,  __x__,                          __x__,                          __x__,  __x__,  KC_TRNS, __x__  \
   ),
 };
 
-const uint16_t PROGMEM fn_actions[] = {
-
+enum function_id {
+    ESC_GRV, // Makes Esc behave like `~ when pressed with the left GUI modifier. This is the "switch between windows of the same application" key combination in macOS
 };
+
+const uint16_t PROGMEM fn_actions[] = {
+  [0]  = ACTION_FUNCTION(ESC_GRV),
+};
+
+void action_function(keyrecord_t *record, uint8_t id, uint8_t opt) {
+  static uint8_t esc_grv_mask;
+  switch (id) {
+    case ESC_GRV:
+      esc_grv_mask = get_mods() & MOD_BIT(KC_LGUI);
+      if (record->event.pressed) {
+        if (esc_grv_mask) {
+          add_key(KC_GRV);
+          send_keyboard_report();
+        } else {
+          add_key(KC_ESC);
+          send_keyboard_report();
+        }
+      } else {
+        if (esc_grv_mask) {
+          del_key(KC_GRV);
+          send_keyboard_report();
+        } else {
+          del_key(KC_ESC);
+          send_keyboard_report();
+        }
+      }
+      break;
+  }
+}
diff --git a/keyboards/gonnerd/readme.md b/keyboards/gonnerd/readme.md
index 1224ff6b0a9..807df308a52 100644
--- a/keyboards/gonnerd/readme.md
+++ b/keyboards/gonnerd/readme.md
@@ -11,6 +11,10 @@ It is possible to change the bootloader of the GON NerD with an ISP programmer.
 _After changing the bootloader on your GON NerD PCB you will not be able to go back to the original firmware and the official configuration software will
 not work anymore. You will lose your warranty and official support from GON!_
 
+## Reset button
+
+To run the `make dfu` command to flash keymaps onto the board, you need to put the board into DFU mode. As the GON NerD PCBs do not have a reset button on the board to put it into DFU mode, be sure to include a `RESET` button on your keymap. Otherwise you'll have to unscrew your keyboard from the case and short the GND and RST pins.
+
 ## Building
 
 Download or clone the whole firmware and navigate to the keyboards/gonnerd folder. Once your dev env is setup, you'll be able to type `make` to generate your .hex - you can then use the Teensy Loader to program your .hex file.