diff --git a/keyboards/canoe/canoe.c b/keyboards/canoe/canoe.c
index bc69df2e5e..a7427e1528 100644
--- a/keyboards/canoe/canoe.c
+++ b/keyboards/canoe/canoe.c
@@ -42,24 +42,55 @@ void backlight_init_ports(void) {
 
 #endif
 
+// for keyboard subdirectory level init functions
+// @Override
+void matrix_init_kb(void) {
+  // call user level keymaps, if any
+  matrix_init_user();
+}
+
 #ifdef RGBLIGHT_ENABLE
 extern rgblight_config_t rgblight_config;
 
+// custom RGB driver
 void rgblight_set(void) {
-    if (!rgblight_config.enable) {
-        for (uint8_t i = 0; i < RGBLED_NUM; i++) {
-            led[i].r = 0;
-            led[i].g = 0;
-            led[i].b = 0;
-        }
+  if (!rgblight_config.enable) {
+    for (uint8_t i=0; i<RGBLED_NUM; i++) {
+      led[i].r = 0;
+      led[i].g = 0;
+      led[i].b = 0;
     }
+  }
 
+  i2c_init();
+  i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+}
+
+bool rgb_init = false;
+
+void matrix_scan_kb(void) {
+  // if LEDs were previously on before poweroff, turn them back on
+  if (rgb_init == false && rgblight_config.enable) {
     i2c_init();
     i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+    rgb_init = true;
+  }
+
+  rgblight_task();
+#else
+void matrix_scan_kb(void) {
+#endif
+  matrix_scan_user();
+  /* Nothing else for now. */
 }
 
-__attribute__ ((weak))
-void matrix_scan_user(void) {
-    rgblight_task();
+__attribute__((weak)) // overridable
+void matrix_init_user(void) {
+
+}
+
+
+__attribute__((weak)) // overridable
+void matrix_scan_user(void) {
+
 }
-#endif
diff --git a/keyboards/canoe/matrix.c b/keyboards/canoe/matrix.c
index 57aa36b5ff..245813dfd2 100644
--- a/keyboards/canoe/matrix.c
+++ b/keyboards/canoe/matrix.c
@@ -21,7 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "matrix.h"
 
 #ifndef DEBOUNCE
-#define DEBOUNCE	5
+#   define DEBOUNCE	5
 #endif
 
 static uint8_t debouncing = DEBOUNCE;
@@ -29,6 +29,9 @@ static uint8_t debouncing = DEBOUNCE;
 static matrix_row_t matrix[MATRIX_ROWS];
 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
 
+void matrix_set_row_status(uint8_t row);
+uint8_t bit_reverse(uint8_t x);
+
 void matrix_init(void) {
     // all outputs for rows high
     DDRB = 0xFF;
@@ -47,18 +50,8 @@ void matrix_init(void) {
         matrix[row] = 0x00;
         matrix_debouncing[row] = 0x00;
     }
-}
 
-void matrix_set_row_status(uint8_t row) {
-    DDRB = (1 << row);
-    PORTB = ~(1 << row);
-}
-
-uint8_t bit_reverse(uint8_t x) {
-    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
-    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
-    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
-    return x;
+    matrix_init_quantum();
 }
 
 uint8_t matrix_scan(void) {
@@ -93,11 +86,24 @@ uint8_t matrix_scan(void) {
         }
     }
 
-    matrix_scan_user();
+    matrix_scan_quantum();
 
     return 1;
 }
 
+// declarations
+void matrix_set_row_status(uint8_t row) {
+    DDRB = (1 << row);
+    PORTB = ~(1 << row);
+}
+
+uint8_t bit_reverse(uint8_t x) {
+    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
+    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
+    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
+    return x;
+}
+
 inline matrix_row_t matrix_get_row(uint8_t row) {
     return matrix[row];
 }
diff --git a/keyboards/iris/keymaps/krusli/README.md b/keyboards/iris/keymaps/krusli/README.md
new file mode 100644
index 0000000000..fc02aa01cc
--- /dev/null
+++ b/keyboards/iris/keymaps/krusli/README.md
@@ -0,0 +1,2 @@
+# krusli's Iris keymap
+Based off the default and Planck keymaps.
diff --git a/keyboards/iris/keymaps/krusli/config.h b/keyboards/iris/keymaps/krusli/config.h
new file mode 100644
index 0000000000..a53c746ad9
--- /dev/null
+++ b/keyboards/iris/keymaps/krusli/config.h
@@ -0,0 +1,43 @@
+/*
+Copyright 2017 Danny Nguyen <danny@keeb.io>
+
+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/>.
+*/
+
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include "config_common.h"
+
+// #define PREVENT_STUCK_MODIFIERS
+
+/* Use I2C or Serial, not both */
+
+#define USE_SERIAL
+// #define USE_I2C
+
+/* Select hand configuration */
+
+#define MASTER_LEFT
+// #define MASTER_RIGHT
+// #define EE_HANDS
+
+#undef RGBLED_NUM
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 12
+#define RGBLIGHT_HUE_STEP 8
+#define RGBLIGHT_SAT_STEP 8
+#define RGBLIGHT_VAL_STEP 8
+
+#endif
diff --git a/keyboards/iris/keymaps/krusli/keymap.c b/keyboards/iris/keymaps/krusli/keymap.c
new file mode 100644
index 0000000000..4aa076ab16
--- /dev/null
+++ b/keyboards/iris/keymaps/krusli/keymap.c
@@ -0,0 +1,98 @@
+#include "iris.h"
+#include "action_layer.h"
+#include "eeconfig.h"
+
+extern keymap_config_t keymap_config;
+
+#define _QWERTY 0
+#define _LOWER 1
+#define _RAISE 2
+#define _ADJUST 16
+
+enum custom_keycodes {
+  QWERTY = SAFE_RANGE,
+  LOWER,
+  RAISE,
+  ADJUST,
+};
+
+#define _______ KC_TRNS
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [_QWERTY] = LAYOUT(
+    KC_ESC,   KC_1,    KC_2,     KC_3,     KC_4,     KC_5,                       KC_6,      KC_7,       KC_8,       KC_9,       KC_0,       KC_BSLS,
+    KC_TAB,   KC_Q,    KC_W,     KC_E,     KC_R,     KC_T,                       KC_Y,      KC_U,       KC_I,       KC_O,       KC_P,       KC_BSPC,
+    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_LSFT,  KC_Z,    KC_X,     KC_C,     KC_V,     KC_B,    KC_HOME,  KC_END,  KC_N,      KC_M,       KC_COMM,    KC_DOT,     KC_SLSH,    KC_ENT,
+                                          KC_LGUI,  LOWER,    KC_SPC,   KC_SPC,  RAISE,      KC_LALT
+  ),
+
+  [_LOWER] = LAYOUT(
+    _______,  _______, _______,  _______,  _______,  _______,                    _______,   _______,    _______,    _______,    _______,    KC_PSCR,
+    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_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,    _______,    KC_LEFT,    KC_DOWN,    KC_UP,      KC_RGHT,
+                                           _______,  _______,  _______, _______, _______,   _______
+  ),
+
+  [_RAISE] = LAYOUT(
+    _______,  _______, _______,  _______,  _______,  _______,                    _______,   _______,    _______,    _______,    _______,    KC_PSCR,
+    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_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_LEFT,    KC_DOWN,    KC_UP,      KC_RGHT,
+                                           _______,  _______,  _______, _______, _______,   _______
+  ),
+
+  [_ADJUST] = LAYOUT(
+    _______, _______, _______,  _______,  _______,  _______,                    _______,  _______,    _______,    _______,    _______,    _______,
+    RGB_TOG, RGB_MOD, RGB_HUI,  RGB_SAI,  RGB_VAI,  _______,                    _______,  _______,    _______,    _______,    _______,    _______,
+    _______, _______, RGB_HUD,  RGB_SAD,  RGB_SAD,  RGB_VAD,                    _______,  _______,    _______,    _______,    _______,    _______,
+    BL_STEP, RESET,   _______,  _______,  _______,  _______,  _______, _______, _______,  _______,    _______,    _______,    _______,    _______,
+                                          _______,  _______,  _______, _______, _______,  _______
+  ),
+};
+
+void persistent_default_layer_set(uint16_t default_layer) {
+  eeconfig_update_default_layer(default_layer);
+  default_layer_set(default_layer);
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case QWERTY:
+      if (record->event.pressed) {
+        persistent_default_layer_set(1UL<<_QWERTY);
+      }
+      return false;
+      break;
+    case LOWER:
+      if (record->event.pressed) {
+        layer_on(_LOWER);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      } else {
+        layer_off(_LOWER);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      }
+      return false;
+      break;
+    case RAISE:
+      if (record->event.pressed) {
+        layer_on(_RAISE);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      } else {
+        layer_off(_RAISE);
+        update_tri_layer(_LOWER, _RAISE, _ADJUST);
+      }
+      return false;
+      break;
+    case ADJUST:
+      if (record->event.pressed) {
+        layer_on(_ADJUST);
+      } else {
+        layer_off(_ADJUST);
+      }
+      return false;
+      break;
+  }
+  return true;
+}
diff --git a/keyboards/iris/keymaps/krusli/rules.mk b/keyboards/iris/keymaps/krusli/rules.mk
new file mode 100644
index 0000000000..c5e16f1369
--- /dev/null
+++ b/keyboards/iris/keymaps/krusli/rules.mk
@@ -0,0 +1,6 @@
+RGBLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = no
+
+ifndef QUANTUM_DIR
+	include ../../../../Makefile
+endif
diff --git a/keyboards/jj40/matrix.c b/keyboards/jj40/matrix.c
index 2932976dde..245813dfd2 100644
--- a/keyboards/jj40/matrix.c
+++ b/keyboards/jj40/matrix.c
@@ -51,7 +51,7 @@ void matrix_init(void) {
         matrix_debouncing[row] = 0x00;
     }
 
-    matrix_init_quantum();  // missing from original port by Luiz
+    matrix_init_quantum();
 }
 
 uint8_t matrix_scan(void) {
@@ -86,7 +86,7 @@ uint8_t matrix_scan(void) {
         }
     }
 
-    matrix_scan_quantum();  // also missing in original PS2AVRGB implementation
+    matrix_scan_quantum();
 
     return 1;
 }
diff --git a/keyboards/mechmini/v1/matrix.c b/keyboards/mechmini/v1/matrix.c
index 140026013f..245813dfd2 100644
--- a/keyboards/mechmini/v1/matrix.c
+++ b/keyboards/mechmini/v1/matrix.c
@@ -29,6 +29,9 @@ static uint8_t debouncing = DEBOUNCE;
 static matrix_row_t matrix[MATRIX_ROWS];
 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
 
+void matrix_set_row_status(uint8_t row);
+uint8_t bit_reverse(uint8_t x);
+
 void matrix_init(void) {
     // all outputs for rows high
     DDRB = 0xFF;
@@ -47,18 +50,8 @@ void matrix_init(void) {
         matrix[row] = 0x00;
         matrix_debouncing[row] = 0x00;
     }
-}
 
-void matrix_set_row_status(uint8_t row) {
-    DDRB = (1 << row);
-    PORTB = ~(1 << row);
-}
-
-uint8_t bit_reverse(uint8_t x) {
-    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
-    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
-    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
-    return x;
+    matrix_init_quantum();
 }
 
 uint8_t matrix_scan(void) {
@@ -93,11 +86,24 @@ uint8_t matrix_scan(void) {
         }
     }
 
-    matrix_scan_user();
+    matrix_scan_quantum();
 
     return 1;
 }
 
+// declarations
+void matrix_set_row_status(uint8_t row) {
+    DDRB = (1 << row);
+    PORTB = ~(1 << row);
+}
+
+uint8_t bit_reverse(uint8_t x) {
+    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
+    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
+    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
+    return x;
+}
+
 inline matrix_row_t matrix_get_row(uint8_t row) {
     return matrix[row];
 }
diff --git a/keyboards/mechmini/v1/v1.c b/keyboards/mechmini/v1/v1.c
index 24c74c6cfd..508d60c784 100644
--- a/keyboards/mechmini/v1/v1.c
+++ b/keyboards/mechmini/v1/v1.c
@@ -22,23 +22,55 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "quantum.h"
 #include "rgblight.h"
 
-// custom RGB driver
-extern rgblight_config_t rgblight_config;
-void rgblight_set(void) {
-    if (!rgblight_config.enable) {
-        for (uint8_t i = 0; i < RGBLED_NUM; i++) {
-            led[i].r = 0;
-            led[i].g = 0;
-            led[i].b = 0;
-        }
-    }
+// for keyboard subdirectory level init functions
+// @Override
+void matrix_init_kb(void) {
+  // call user level keymaps, if any
+  matrix_init_user();
+}
 
+#ifdef RGBLIGHT_ENABLE
+extern rgblight_config_t rgblight_config;
+
+// custom RGB driver
+void rgblight_set(void) {
+  if (!rgblight_config.enable) {
+    for (uint8_t i=0; i<RGBLED_NUM; i++) {
+      led[i].r = 0;
+      led[i].g = 0;
+      led[i].b = 0;
+    }
+  }
+
+  i2c_init();
+  i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+}
+
+bool rgb_init = false;
+
+void matrix_scan_kb(void) {
+  // if LEDs were previously on before poweroff, turn them back on
+  if (rgb_init == false && rgblight_config.enable) {
     i2c_init();
     i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+    rgb_init = true;
+  }
+
+  rgblight_task();
+#else
+void matrix_scan_kb(void) {
+#endif
+  matrix_scan_user();
+  /* Nothing else for now. */
 }
 
-__attribute__ ((weak))
-void matrix_scan_user(void) {
-    rgblight_task();
-     /* add other tasks to be done on each matrix scan */
+__attribute__((weak)) // overridable
+void matrix_init_user(void) {
+
+}
+
+
+__attribute__((weak)) // overridable
+void matrix_scan_user(void) {
+
 }
diff --git a/keyboards/ps2avrGB/matrix.c b/keyboards/ps2avrGB/matrix.c
index 57aa36b5ff..245813dfd2 100644
--- a/keyboards/ps2avrGB/matrix.c
+++ b/keyboards/ps2avrGB/matrix.c
@@ -21,7 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "matrix.h"
 
 #ifndef DEBOUNCE
-#define DEBOUNCE	5
+#   define DEBOUNCE	5
 #endif
 
 static uint8_t debouncing = DEBOUNCE;
@@ -29,6 +29,9 @@ static uint8_t debouncing = DEBOUNCE;
 static matrix_row_t matrix[MATRIX_ROWS];
 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
 
+void matrix_set_row_status(uint8_t row);
+uint8_t bit_reverse(uint8_t x);
+
 void matrix_init(void) {
     // all outputs for rows high
     DDRB = 0xFF;
@@ -47,18 +50,8 @@ void matrix_init(void) {
         matrix[row] = 0x00;
         matrix_debouncing[row] = 0x00;
     }
-}
 
-void matrix_set_row_status(uint8_t row) {
-    DDRB = (1 << row);
-    PORTB = ~(1 << row);
-}
-
-uint8_t bit_reverse(uint8_t x) {
-    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
-    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
-    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
-    return x;
+    matrix_init_quantum();
 }
 
 uint8_t matrix_scan(void) {
@@ -93,11 +86,24 @@ uint8_t matrix_scan(void) {
         }
     }
 
-    matrix_scan_user();
+    matrix_scan_quantum();
 
     return 1;
 }
 
+// declarations
+void matrix_set_row_status(uint8_t row) {
+    DDRB = (1 << row);
+    PORTB = ~(1 << row);
+}
+
+uint8_t bit_reverse(uint8_t x) {
+    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
+    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
+    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
+    return x;
+}
+
 inline matrix_row_t matrix_get_row(uint8_t row) {
     return matrix[row];
 }
diff --git a/keyboards/ps2avrGB/ps2avrGB.c b/keyboards/ps2avrGB/ps2avrGB.c
index 701c5847f5..45ba37bffe 100644
--- a/keyboards/ps2avrGB/ps2avrGB.c
+++ b/keyboards/ps2avrGB/ps2avrGB.c
@@ -24,22 +24,55 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "i2c.h"
 #include "quantum.h"
 
+// for keyboard subdirectory level init functions
+// @Override
+void matrix_init_kb(void) {
+  // call user level keymaps, if any
+  matrix_init_user();
+}
+
+#ifdef RGBLIGHT_ENABLE
 extern rgblight_config_t rgblight_config;
 
+// custom RGB driver
 void rgblight_set(void) {
-    if (!rgblight_config.enable) {
-        for (uint8_t i = 0; i < RGBLED_NUM; i++) {
-            led[i].r = 0;
-            led[i].g = 0;
-            led[i].b = 0;
-        }
+  if (!rgblight_config.enable) {
+    for (uint8_t i=0; i<RGBLED_NUM; i++) {
+      led[i].r = 0;
+      led[i].g = 0;
+      led[i].b = 0;
     }
+  }
 
+  i2c_init();
+  i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+}
+
+bool rgb_init = false;
+
+void matrix_scan_kb(void) {
+  // if LEDs were previously on before poweroff, turn them back on
+  if (rgb_init == false && rgblight_config.enable) {
     i2c_init();
     i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+    rgb_init = true;
+  }
+
+  rgblight_task();
+#else
+void matrix_scan_kb(void) {
+#endif
+  matrix_scan_user();
+  /* Nothing else for now. */
 }
 
-__attribute__ ((weak))
-void matrix_scan_user(void) {
-    rgblight_task();
+__attribute__((weak)) // overridable
+void matrix_init_user(void) {
+
+}
+
+
+__attribute__((weak)) // overridable
+void matrix_scan_user(void) {
+
 }
diff --git a/quantum/template/ps2avrgb/matrix.c b/quantum/template/ps2avrgb/matrix.c
index 57aa36b5ff..245813dfd2 100644
--- a/quantum/template/ps2avrgb/matrix.c
+++ b/quantum/template/ps2avrgb/matrix.c
@@ -21,7 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "matrix.h"
 
 #ifndef DEBOUNCE
-#define DEBOUNCE	5
+#   define DEBOUNCE	5
 #endif
 
 static uint8_t debouncing = DEBOUNCE;
@@ -29,6 +29,9 @@ static uint8_t debouncing = DEBOUNCE;
 static matrix_row_t matrix[MATRIX_ROWS];
 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
 
+void matrix_set_row_status(uint8_t row);
+uint8_t bit_reverse(uint8_t x);
+
 void matrix_init(void) {
     // all outputs for rows high
     DDRB = 0xFF;
@@ -47,18 +50,8 @@ void matrix_init(void) {
         matrix[row] = 0x00;
         matrix_debouncing[row] = 0x00;
     }
-}
 
-void matrix_set_row_status(uint8_t row) {
-    DDRB = (1 << row);
-    PORTB = ~(1 << row);
-}
-
-uint8_t bit_reverse(uint8_t x) {
-    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
-    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
-    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
-    return x;
+    matrix_init_quantum();
 }
 
 uint8_t matrix_scan(void) {
@@ -93,11 +86,24 @@ uint8_t matrix_scan(void) {
         }
     }
 
-    matrix_scan_user();
+    matrix_scan_quantum();
 
     return 1;
 }
 
+// declarations
+void matrix_set_row_status(uint8_t row) {
+    DDRB = (1 << row);
+    PORTB = ~(1 << row);
+}
+
+uint8_t bit_reverse(uint8_t x) {
+    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
+    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
+    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
+    return x;
+}
+
 inline matrix_row_t matrix_get_row(uint8_t row) {
     return matrix[row];
 }