3 files changed, 16 insertions, 45 deletions
diff --git a/keyboards/crkbd/keymaps/madhatter/config.h b/keyboards/crkbd/keymaps/madhatter/config.h
index bcf4e05005..6cbe5befb8 100644
--- a/keyboards/crkbd/keymaps/madhatter/config.h
+++ b/keyboards/crkbd/keymaps/madhatter/config.h
@@ -28,9 +28,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // #define MASTER_RIGHT
 // #define EE_HANDS
 
-#define SSD1306OLED
-#define USE_SSD_I2C
-
 #define USE_SERIAL_PD2
 
 #define TAPPING_FORCE_HOLD
diff --git a/keyboards/crkbd/keymaps/madhatter/keymap.c b/keyboards/crkbd/keymaps/madhatter/keymap.c
index c228a7b573..f833428a02 100644
--- a/keyboards/crkbd/keymaps/madhatter/keymap.c
+++ b/keyboards/crkbd/keymaps/madhatter/keymap.c
@@ -17,10 +17,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include QMK_KEYBOARD_H
-#ifdef SSD1306OLED
-#    include "ssd1306.h"
-#    include <string.h>
-#endif
+#include <string.h>
 
 enum corny_layers {
   _QWERTY,
@@ -108,14 +105,9 @@ void matrix_init_user(void) {
     #ifdef RGBLIGHT_ENABLE
       RGB_current_mode = rgblight_get_mode();
     #endif
-    //SSD1306 OLED init, make sure to add #define SSD1306OLED in config.h
-    #ifdef SSD1306OLED
-        iota_gfx_init();   // turns on the display
-    #endif
 }
 
-//SSD1306 OLED update loop, make sure to add #define SSD1306OLED in config.h
-#ifdef SSD1306OLED
+#ifdef OLED_ENABLE
 
 // When add source files to SRC in rules.mk, you can use functions.
 const char *read_layer_state(void);
@@ -129,42 +121,26 @@ const char *read_keylogs(void);
 // void set_timelog(void);
 // const char *read_timelog(void);
 
-void matrix_scan_user(void) {
-   iota_gfx_task();
-}
-
-void matrix_render_user(struct CharacterMatrix *matrix) {
+bool oled_task_user(void) {
   if (is_keyboard_master()) {
     // If you want to change the display of OLED, you need to change here
-    matrix_write(matrix, read_layer_state());
-    matrix_write(matrix, read_keylog());
-    //matrix_write_ln(matrix, read_keylogs());
-    //matrix_write_ln(matrix, read_mode_icon(keymap_config.swap_lalt_lgui));
-    //matrix_write_ln(matrix, read_host_led_state());
-    //matrix_write_ln(matrix, read_timelog());
+    oled_write(read_layer_state(), false);
+    oled_write(read_keylog(), false);
+    //oled_write_ln(read_keylogs(), false);
+    //oled_write_ln(read_mode_icon(keymap_config.swap_lalt_lgui), false);
+    //oled_write_ln(read_host_led_state(), false);
+    //oled_write_ln(read_timelog(), false);
   } else {
-    matrix_write(matrix, read_logo());
+    oled_write(read_logo(), false);
   }
+  return false;
 }
 
-void matrix_update(struct CharacterMatrix *dest, const struct CharacterMatrix *source) {
-  if (memcmp(dest->display, source->display, sizeof(dest->display))) {
-    memcpy(dest->display, source->display, sizeof(dest->display));
-    dest->dirty = true;
-  }
-}
-
-void iota_gfx_task_user(void) {
-  struct CharacterMatrix matrix;
-  matrix_clear(&matrix);
-  matrix_render_user(&matrix);
-  matrix_update(&display, &matrix);
-}
-#endif//SSD1306OLED
+#endif
 
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   if (record->event.pressed) {
-#ifdef SSD1306OLED
+#ifdef OLED_ENABLE
     set_keylog(keycode, record);
 #endif
     // set_timelog();
diff --git a/keyboards/crkbd/keymaps/madhatter/rules.mk b/keyboards/crkbd/keymaps/madhatter/rules.mk
index 489b16ef1c..89a2791bcd 100644
--- a/keyboards/crkbd/keymaps/madhatter/rules.mk
+++ b/keyboards/crkbd/keymaps/madhatter/rules.mk
@@ -1,13 +1,11 @@
+OLED_ENABLE     = yes
+OLED_DRIVER     = SSD1306
 
 # If you want to change the display of OLED, you need to change here
-SRC +=  ./lib/glcdfont.c \
-        ./lib/rgb_state_reader.c \
+SRC +=  ./lib/rgb_state_reader.c \
         ./lib/layer_state_reader.c \
         ./lib/logo_reader.c \
         ./lib/keylogger.c \
         # ./lib/mode_icon_reader.c \
         # ./lib/host_led_state_reader.c \
         # ./lib/timelogger.c \
-
-VPATH += keyboards/crkbd/lib
-LIB_SRC += ssd1306.c i2c.c