[Keymap] Adding personal keymap / clarifying default keymap readme (#6119)

* Adding led support for Plaid

* Adding led support for Plaid

* Update readme.md

Fixing bad markdown

* Adding my personal keymap

* Clarifying LED instructions / formatting

keyboards/plaid/keymaps/brickbots/config.h

@@ -0,0 +1,19 @@
+/* Copyright 2019 Takuya Urakawa (dm9records.com)
+ *
+ * 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
+
+// place overrides here

keyboards/plaid/keymaps/brickbots/keymap.c

@@ -0,0 +1,411 @@
+/* Copyright 2019 Takuya Urakawa (dm9records.com)
+ *
+ * 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
+
+extern keymap_config_t keymap_config;
+
+enum plaid_layers {
+  _QWERTY,
+  _COLEMAK,
+  _DVORAK,
+  _LOWER,
+  _RAISE,
+  _PLOVER,
+  _ADJUST
+};
+
+enum plaid_keycodes {
+  QWERTY = SAFE_RANGE,
+  COLEMAK,
+  DVORAK,
+  PLOVER,
+  EXT_PLV,
+  LED_1,
+  LED_2,
+  LED_3,
+  LED_4,
+  LED_5,
+  LED_6,
+  LED_7,
+  LED_8,
+  LED_9,
+  LED_0
+};
+
+#define LOWER MO(_LOWER)
+#define RAISE MO(_RAISE)
+
+// array of keys considered modifiers for led purposes
+const uint16_t modifiers[] = {
+    KC_LCTL,
+    KC_RCTL,
+    KC_LALT,
+    KC_RALT,
+    KC_LSFT,
+    KC_RSFT,
+    KC_LGUI,
+    KC_RGUI,
+    LOWER,
+    RAISE
+};
+
+//Setup consts for LED modes
+#define LEDMODE_ON 1 //always on
+#define LEDMODE_OFF 0 //always off
+#define LEDMODE_MODS 2 //On with modifiers
+#define LEDMODE_BLINKIN 3 //blinkinlights - % chance toggle on keypress
+#define LEDMODE_KEY 4 //On with any keypress, off with key release
+#define LEDMODE_ENTER 5 // On with enter key
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+/* Qwerty
+ * ,-----------------------------------------------------------------------------------.
+ * | Esc  |   Q  |   W  |   E  |   R  |   T  |   Y  |   U  |   I  |   O  |   P  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Tab  |   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   ;  |  "   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   Z  |   X  |   C  |   V  |   B  |   N  |   M  |   ,  |   .  |   /  |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Ltrl | Rctl | Alt  | GUI  |Lower |    Space    |Raise | Left | Down |  Up  |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_QWERTY] = LAYOUT_plaid_grid(
+    KC_ESC,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+    KC_TAB,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+    KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT ,
+    KC_LCTL, KC_RCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+),
+
+/* Colemak
+ * ,-----------------------------------------------------------------------------------.
+ * | Tab  |   Q  |   W  |   F  |   P  |   G  |   J  |   L  |   U  |   Y  |   ;  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Esc  |   A  |   R  |   S  |   T  |   D  |   H  |   N  |   E  |   I  |   O  |  "   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   Z  |   X  |   C  |   V  |   B  |   K  |   M  |   ,  |   .  |   /  |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Ctrl | RAlt | Alt  | GUI  |Lower |    Space    |Raise | Left | Down |  Up  |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_COLEMAK] = LAYOUT_plaid_grid(
+    KC_TAB,  KC_Q,    KC_W,    KC_F,    KC_P,    KC_G,    KC_J,    KC_L,    KC_U,    KC_Y,    KC_SCLN, KC_BSPC,
+    KC_ESC,  KC_A,    KC_R,    KC_S,    KC_T,    KC_D,    KC_H,    KC_N,    KC_E,    KC_I,    KC_O,    KC_QUOT,
+    KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_K,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT ,
+    KC_LCTL, KC_RALT, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+),
+
+/* Dvorak
+ * ,-----------------------------------------------------------------------------------.
+ * | Tab  |   "  |   ,  |   .  |   P  |   Y  |   F  |   G  |   C  |   R  |   L  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Esc  |   A  |   O  |   E  |   U  |   I  |   D  |   H  |   T  |   N  |   S  |  /   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   ;  |   Q  |   J  |   K  |   X  |   B  |   M  |   W  |   V  |   Z  |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Ctrl | RAlt | Alt  | GUI  |Lower |    Space    |Raise | Left | Down |  Up  |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_DVORAK] = LAYOUT_plaid_grid(
+    KC_TAB,  KC_QUOT, KC_COMM, KC_DOT,  KC_P,    KC_Y,    KC_F,    KC_G,    KC_C,    KC_R,    KC_L,    KC_BSPC,
+    KC_ESC,  KC_A,    KC_O,    KC_E,    KC_U,    KC_I,    KC_D,    KC_H,    KC_T,    KC_N,    KC_S,    KC_SLSH,
+    KC_LSFT, KC_SCLN, KC_Q,    KC_J,    KC_K,    KC_X,    KC_B,    KC_M,    KC_W,    KC_V,    KC_Z,    KC_ENT ,
+    KC_LCTL, KC_RALT, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+),
+
+/* Lower
+ * ,-----------------------------------------------------------------------------------.
+ * |   ~  |   !  |   @  |   #  |   $  |   %  |   ^  |   &  |   *  |   (  |   )  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Del  |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |   _  |   +  |   {  |   }  |  |   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |ISO ~ |ISO | | Home | End  |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      | Next | Vol- | Vol+ | Play |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_LOWER] = LAYOUT_plaid_grid(
+    KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR,    KC_ASTR,    KC_LPRN, KC_RPRN, KC_BSPC,
+    KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_UNDS,    KC_PLUS,    KC_LCBR, KC_RCBR, KC_PIPE,
+    _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  S(KC_NUHS), S(KC_NUBS), KC_HOME, KC_END,  _______,
+    _______, _______, _______, _______, _______, _______, _______, _______,    KC_MNXT,    KC_VOLD, KC_VOLU, KC_MPLY
+),
+
+/* Raise
+ * ,-----------------------------------------------------------------------------------.
+ * |   `  |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Del  |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |   -  |   =  |   [  |   ]  |  \   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |ISO # |ISO / |Pg Up |Pg Dn |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      | Next | Vol- | Vol+ | Play |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_RAISE] = LAYOUT_plaid_grid(
+    KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC,
+    KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS,
+    _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_NUHS, KC_NUBS, KC_PGUP, KC_PGDN, _______,
+    _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+),
+
+/* Plover layer (http://opensteno.org)
+ * ,-----------------------------------------------------------------------------------.
+ * |   #  |   #  |   #  |   #  |   #  |   #  |   #  |   #  |   #  |   #  |   #  |   #  |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |   S  |   T  |   P  |   H  |   *  |   *  |   F  |   P  |   L  |   T  |   D  |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |   S  |   K  |   W  |   R  |   *  |   *  |   R  |   B  |   G  |   S  |   Z  |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Exit |      |      |   A  |   O  |             |   E  |   U  |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+
+[_PLOVER] = LAYOUT_plaid_grid(
+    KC_1,    KC_1,    KC_1,    KC_1,    KC_1,    KC_1,    KC_1,    KC_1,    KC_1,    KC_1,    KC_1,    KC_1   ,
+    XXXXXXX, KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC,
+    XXXXXXX, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+    EXT_PLV, XXXXXXX, XXXXXXX, KC_C,    KC_V,    XXXXXXX, XXXXXXX, KC_N,    KC_M,    XXXXXXX, XXXXXXX, XXXXXXX
+),
+
+/* Adjust (Lower + Raise)
+ * ,-----------------------------------------------------------------------------------.
+ * |Reset |      |      |      |      |      |      |      |      |      |      |  Del |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |      |      |Aud on|Audoff|AGnorm|AGswap|Qwerty|Colemk|Dvorak|Plover|      |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |Voice-|Voice+|Mus on|Musoff|MIDIon|MIDIof|      |      |      |      |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      |      |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_ADJUST] = LAYOUT_plaid_grid(
+    RESET,LED_1, LED_2, LED_3, LED_4, LED_5,LED_6, LED_7, LED_8, LED_9, LED_0,KC_DEL ,
+    _______, _______, MU_MOD,  AU_ON,   AU_OFF,  AG_NORM, AG_SWAP, QWERTY,  COLEMAK, DVORAK,  PLOVER,  _______,
+    _______, MUV_DE,  MUV_IN,  MU_ON,   MU_OFF,  MI_ON,   MI_OFF,  TERM_ON, TERM_OFF, _______, _______, _______,
+    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+)
+
+
+};
+
+//Setup config struct for LED
+typedef union {
+  uint32_t raw;
+  struct {
+    uint8_t  red_mode :8;
+    uint8_t  green_mode :8;
+  };
+} led_config_t;
+led_config_t led_config;
+
+//Set leds to saved state during powerup
+void keyboard_post_init_user(void) {
+  // Call the post init code.
+  led_config.raw = eeconfig_read_user();
+
+  if(led_config.red_mode == LEDMODE_ON) {
+      writePinHigh(LED_RED);
+  }
+
+  if(led_config.green_mode == LEDMODE_ON) {
+      writePinHigh(LED_GREEN);
+  }
+}
+
+void eeconfig_init_user(void) {  // EEPROM is getting reset! 
+  led_config.raw = 0;
+  led_config.red_mode = LEDMODE_ON;
+  led_config.green_mode = LEDMODE_MODS;
+      eeconfig_update_user(led_config.raw);
+  eeconfig_update_user(led_config.raw);
+}
+
+uint32_t layer_state_set_user(uint32_t state) {
+  return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+}
+
+void led_keypress_update(uint8_t led, uint8_t led_mode, uint16_t keycode, keyrecord_t *record) {
+    switch (led_mode) {
+      case LEDMODE_MODS:
+        for (int i=0;i<sizeof(modifiers) / sizeof(modifiers[0]);i++) {
+          if(keycode==modifiers[i]) {
+            if (record->event.pressed) {
+              writePinHigh(led);
+            }
+            else {
+              writePinLow(led);
+            }
+          }
+        }
+        break;
+      case LEDMODE_BLINKIN:
+        if (record->event.pressed) {
+          if(rand() % 2 == 1) {
+            if(rand() % 2 == 0) {
+              writePinLow(led);
+            }
+            else {
+              writePinHigh(led);
+            }
+          }
+        }
+        break;
+      case LEDMODE_KEY:
+        if (record->event.pressed) {
+          writePinHigh(led);
+          return;
+        }
+        else {
+          writePinLow(led);
+          return;
+        }
+        break;
+      case LEDMODE_ENTER:
+        if (keycode==KC_ENT) {
+          writePinHigh(led);
+        }
+        else {
+          writePinLow(led);
+        }
+        break;
+
+    }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  /* If the either led mode is keypressed based, call the led updater
+     then let it fall through the keypress handlers. Just to keep 
+     the logic out of this procedure */
+  if (led_config.red_mode >= LEDMODE_MODS && led_config.red_mode <= LEDMODE_ENTER) {
+      led_keypress_update(LED_RED, led_config.red_mode, keycode, record);
+  }
+  if (led_config.green_mode >= LEDMODE_MODS && led_config.green_mode <= LEDMODE_ENTER) {
+      led_keypress_update(LED_GREEN, led_config.green_mode, keycode, record);
+  }
+  switch (keycode) {
+    case QWERTY:
+      if (record->event.pressed) {
+        print("mode just switched to qwerty and this is a huge string\n");
+        set_single_persistent_default_layer(_QWERTY);
+      }
+      return false;
+      break;
+    case COLEMAK:
+      if (record->event.pressed) {
+        set_single_persistent_default_layer(_COLEMAK);
+      }
+      return false;
+      break;
+    case DVORAK:
+      if (record->event.pressed) {
+        set_single_persistent_default_layer(_DVORAK);
+      }
+      return false;
+      break;
+    case PLOVER:
+      if (record->event.pressed) {
+        layer_off(_RAISE);
+        layer_off(_LOWER);
+        layer_off(_ADJUST);
+        layer_on(_PLOVER);
+        if (!eeconfig_is_enabled()) {
+            eeconfig_init();
+        }
+        keymap_config.raw = eeconfig_read_keymap();
+        keymap_config.nkro = 1;
+        eeconfig_update_keymap(keymap_config.raw);
+      }
+      return false;
+      break;
+    case EXT_PLV:
+      if (record->event.pressed) {
+        layer_off(_PLOVER);
+      }
+      return false;
+      break;
+    case LED_1:
+      if (record->event.pressed) {
+        if (led_config.red_mode==LEDMODE_ON) {
+            led_config.red_mode=LEDMODE_OFF;
+            writePinLow(LED_RED);
+        }
+        else {
+            led_config.red_mode=LEDMODE_ON;
+            writePinHigh(LED_RED);
+        }
+      }
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_2:
+      if (record->event.pressed) {
+        if (led_config.green_mode==LEDMODE_ON) {
+            led_config.green_mode=LEDMODE_OFF;
+            writePinLow(LED_GREEN);
+        }
+        else {
+            led_config.green_mode=LEDMODE_ON;
+            writePinHigh(LED_GREEN);
+        }
+      }
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_3:
+      led_config.red_mode=LEDMODE_MODS;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_4:
+      led_config.green_mode=LEDMODE_MODS;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_5:
+      led_config.red_mode=LEDMODE_BLINKIN;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_6:
+      led_config.green_mode=LEDMODE_BLINKIN;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_7:
+      led_config.red_mode=LEDMODE_KEY;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_8:
+      led_config.green_mode=LEDMODE_KEY;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_9:
+      led_config.red_mode=LEDMODE_ENTER;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+    case LED_0:
+      led_config.green_mode=LEDMODE_ENTER;
+      eeconfig_update_user(led_config.raw);
+      return false;
+      break;
+  }
+  return true;
+}

keyboards/plaid/keymaps/brickbots/readme.md

@@ -0,0 +1,36 @@
+# Brickbots keymap for plaid
+Original copyright 2019 Takuya Urakawa (dm9records.com)
+LED Support added by Richard Sutherland (rich@brickbots.com)
+
+This layout is based on the Planck layout, with esc/tab swapped and an extra
+ctrl key in the bottom left corner. It includes an adjust layer (6)
+accessible by holding the lower and raise modifiers (MO3 and MO4) together.
+The adjustment layer is used to set the behavior of the two LEDs:
+
+**Modifier Mode:**   
+Activates when any modifier (shift, alt, os, MO) key is held
+down.  LED turns off when key is release
+
+**Blinkinlights Mode:**  
+Random chance of state change on each keystroke.
+
+**Keypress Mode:**  
+On for any keypress as long as the key is pressed
+
+**Carriage Mode:**  
+Turns on when enter is pressed, turns off when any next key is pressed
+
+To set the behavior of an LED, and save it to eeprom, hold the
+raise/lower keys together to access the adjust layer, then use
+the keys indicated below to set the behaviors
+
+* q = Toggle Red LED state, deactivates any other modes
+* w = Toggle Green LED state, deactivates any other modes
+* e = Set RED LED to modifier mode
+* r = Set GREEN LED to modifier mode
+* t = Set RED LED to Blinkinlights mode
+* y = set GREEN LED to Blinkinlights mode
+* u = set RED LED to Keypress mode
+* i = set GREEN LED to Keypress mode
+* o = set RED LED to Carriage mode
+* p = set GREEN LED to Carriage mode

keyboards/plaid/keymaps/default/readme.md

@@ -6,27 +6,30 @@ This layout is based on the Planck layout, and includes an adjust layer (6)
 accessible by holding the lower and raise modifiers (MO3 and MO4) together.
 The adjustment layer is used to set the behavior of the two LEDs:
 
-Modifier Mode: 
-
+**Modifier Mode:**   
 Activates when any modifier (shift, alt, os, MO) key is held
 down.  LED turns off when key is release
 
-Blinkinlights Mode:
+**Blinkinlights Mode:**  
 Random chance of state change on each keystroke.
 
-Keypress Mode:
+**Keypress Mode:**  
 On for any keypress as long as the key is pressed
 
-Carriage Mode:
+**Carriage Mode:**  
 Turns on when enter is pressed, turns off when any next key is pressed
 
-q = Toggle Red LED state, deactivates any other modes
-w = Toggle Green LED state, deactivates any other modes
-e = Set RED LED to modifier mode
-r = Set GREEN LED to modifier mode
-t = Set RED LED to Blinkinlights mode
-y = set GREEN LED to Blinkinlights mode
-u = set RED LED to Keypress mode
-i = set GREEN LED to Keypress mode
-o = set RED LED to Carriage mode
-p = set GREEN LED to Carriage mode
+To set the behavior of an LED, and save it to eeprom, hold the
+raise/lower keys together to access the adjust layer, then use
+the keys indicated below to set the behaviors
+
+* q = Toggle Red LED state, deactivates any other modes
+* w = Toggle Green LED state, deactivates any other modes
+* e = Set RED LED to modifier mode
+* r = Set GREEN LED to modifier mode
+* t = Set RED LED to Blinkinlights mode
+* y = set GREEN LED to Blinkinlights mode
+* u = set RED LED to Keypress mode
+* i = set GREEN LED to Keypress mode
+* o = set RED LED to Carriage mode
+* p = set GREEN LED to Carriage mode