Remove extraneous 'extern' hints (#21516)

Marlin/src/feature/fanmux.h

@@ -25,5 +25,5 @@
  * feature/fanmux.h - Cooling Fan Multiplexer support functions
  */
 
-extern void fanmux_switch(const uint8_t e);
+void fanmux_switch(const uint8_t e);
-extern void fanmux_init();
+void fanmux_init();

Marlin/src/lcd/extui/lib/dgus/DGUSDisplay.h

@@ -117,7 +117,7 @@ extern DGUSDisplay dgusdisplay;
 constexpr float cpow(const float x, const int y) { return y == 0 ? 1.0 : x * cpow(x, y - 1); }
 
 /// Find the flash address of a DGUS_VP_Variable for the VP.
-extern const DGUS_VP_Variable* DGUSLCD_FindVPVar(const uint16_t vp);
+const DGUS_VP_Variable* DGUSLCD_FindVPVar(const uint16_t vp);
 
 /// Helper to populate a DGUS_VP_Variable for a given VP. Return false if not found.
-extern bool populate_VPVar(const uint16_t VP, DGUS_VP_Variable * const ramcopy);
+bool populate_VPVar(const uint16_t VP, DGUS_VP_Variable * const ramcopy);

Marlin/src/lcd/extui/lib/mks_ui/draw_about.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_about();
+void lv_draw_about();
-extern void lv_clear_about();
+void lv_clear_about();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_acceleration_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_acceleration_settings();
+void lv_draw_acceleration_settings();
-extern void lv_clear_acceleration_settings();
+void lv_clear_acceleration_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_advance_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_advance_settings();
+void lv_draw_advance_settings();
-extern void lv_clear_advance_settings();
+void lv_clear_advance_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_auto_level_offset_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_auto_level_offset_settings();
+void lv_draw_auto_level_offset_settings();
-extern void lv_clear_auto_level_offset_settings();
+void lv_clear_auto_level_offset_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_baby_stepping.h

@@ -25,10 +25,10 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_baby_stepping();
+void lv_draw_baby_stepping();
-extern void lv_clear_baby_stepping();
+void lv_clear_baby_stepping();
-extern void disp_baby_step_dist();
+void disp_baby_step_dist();
-extern void disp_z_offset_value();
+void disp_z_offset_value();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_change_speed.h

@@ -28,11 +28,11 @@
 #define MIN_EXT_SPEED_PERCENT    10
 #define MAX_EXT_SPEED_PERCENT   999
 
-extern void lv_draw_change_speed();
+void lv_draw_change_speed();
-extern void lv_clear_change_speed();
+void lv_clear_change_speed();
-extern void disp_speed_step();
+void disp_speed_step();
-extern void disp_print_speed();
+void disp_print_speed();
-extern void disp_speed_type();
+void disp_speed_type();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_cloud_bind.h

@@ -25,12 +25,12 @@
 extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_cloud_bind();
+void lv_draw_cloud_bind();
-extern void lv_clear_cloud_bind();
+void lv_clear_cloud_bind();
-extern void disp_bind_state();
+void disp_bind_state();
-extern void refresh_bind_ui();
+void refresh_bind_ui();
-extern void display_qrcode(uint8_t *qrcode_data);
+void display_qrcode(uint8_t *qrcode_data);
-extern void cloud_unbind();
+void cloud_unbind();
 
 #ifdef __cplusplus
 } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_dialog.h

@@ -74,11 +74,11 @@ enum {
   DIALOG_TRANSFER_NO_DEVICE
 };
 
-extern void lv_draw_dialog(uint8_t type);
+void lv_draw_dialog(uint8_t type);
-extern void lv_clear_dialog();
+void lv_clear_dialog();
-extern void filament_sprayer_temp();
+void filament_sprayer_temp();
-extern void filament_dialog_handle();
+void filament_dialog_handle();
-extern void lv_filament_setbar();
+void lv_filament_setbar();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_eeprom_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_eeprom_settings();
+void lv_draw_eeprom_settings();
-extern void lv_clear_eeprom_settings();
+void lv_clear_eeprom_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_encoder_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_encoder_settings();
+void lv_draw_encoder_settings();
-extern void lv_clear_encoder_settings();
+void lv_clear_encoder_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_error_message.h

@@ -29,8 +29,8 @@
   #define PGM_P const char *
 #endif
 
-extern void lv_draw_error_message(PGM_P const msg);
+void lv_draw_error_message(PGM_P const msg);
-extern void lv_clear_error_message();
+void lv_clear_error_message();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_extrusion.h

@@ -25,13 +25,13 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_extrusion();
+void lv_draw_extrusion();
-extern void lv_clear_extrusion();
+void lv_clear_extrusion();
-extern void disp_ext_type();
+void disp_ext_type();
-extern void disp_ext_step();
+void disp_ext_step();
-extern void disp_ext_speed();
+void disp_ext_speed();
-extern void disp_hotend_temp();
+void disp_hotend_temp();
-extern void disp_extru_amount();
+void disp_extru_amount();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_fan.h

@@ -25,9 +25,9 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_fan();
+void lv_draw_fan();
-extern void lv_clear_fan();
+void lv_clear_fan();
-extern void disp_fan_value();
+void disp_fan_value();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_filament_change.h

@@ -25,10 +25,10 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_filament_change();
+void lv_draw_filament_change();
-extern void lv_clear_filament_change();
+void lv_clear_filament_change();
-extern void disp_filament_type();
+void disp_filament_type();
-extern void disp_filament_temp();
+void disp_filament_temp();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_filament_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_filament_settings();
+void lv_draw_filament_settings();
-extern void lv_clear_filament_settings();
+void lv_clear_filament_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_gcode.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_gcode(bool clear = false);
+void lv_draw_gcode(bool clear = false);
-extern void lv_clear_gcode();
+void lv_clear_gcode();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_home.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_home();
+void lv_draw_home();
-extern void lv_clear_home();
+void lv_clear_home();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_homing_sensitivity_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_homing_sensitivity_settings();
+void lv_draw_homing_sensitivity_settings();
-extern void lv_clear_homing_sensitivity_settings();
+void lv_clear_homing_sensitivity_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_jerk_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_jerk_settings();
+void lv_draw_jerk_settings();
-extern void lv_clear_jerk_settings();
+void lv_clear_jerk_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_keyboard.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_keyboard();
+void lv_draw_keyboard();
-extern void lv_clear_keyboard();
+void lv_clear_keyboard();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_language.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_language();
+void lv_draw_language();
-extern void lv_clear_language();
+void lv_clear_language();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_level_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_level_settings();
+void lv_draw_level_settings();
-extern void lv_clear_level_settings();
+void lv_clear_level_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_machine_para.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_machine_para();
+void lv_draw_machine_para();
-extern void lv_clear_machine_para();
+void lv_clear_machine_para();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_machine_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_machine_settings();
+void lv_draw_machine_settings();
-extern void lv_clear_machine_settings();
+void lv_clear_machine_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_manuaLevel.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_manualLevel();
+void lv_draw_manualLevel();
-extern void lv_clear_manualLevel();
+void lv_clear_manualLevel();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_max_feedrate_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_max_feedrate_settings();
+void lv_draw_max_feedrate_settings();
-extern void lv_clear_max_feedrate_settings();
+void lv_clear_max_feedrate_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_more.h

@@ -25,8 +25,8 @@
 extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_more();
+void lv_draw_more();
-extern void lv_clear_more();
+void lv_clear_more();
 
 #ifdef __cplusplus
 } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_motor_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_motor_settings();
+void lv_draw_motor_settings();
-extern void lv_clear_motor_settings();
+void lv_clear_motor_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_move_motor.h

@@ -25,9 +25,9 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_move_motor();
+void lv_draw_move_motor();
-extern void lv_clear_move_motor();
+void lv_clear_move_motor();
-extern void disp_move_dist();
+void disp_move_dist();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_number_key.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_number_key();
+void lv_draw_number_key();
-extern void lv_clear_number_key();
+void lv_clear_number_key();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_operation.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_operation();
+void lv_draw_operation();
-extern void lv_clear_operation();
+void lv_clear_operation();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_pause_message.h

@@ -25,7 +25,7 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_pause_message(const PauseMessage msg);
+void lv_draw_pause_message(const PauseMessage msg);
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_pause_position.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_pause_position();
+void lv_draw_pause_position();
-extern void lv_clear_pause_position();
+void lv_clear_pause_position();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_preHeat.h

@@ -25,11 +25,11 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_preHeat();
+void lv_draw_preHeat();
-extern void lv_clear_preHeat();
+void lv_clear_preHeat();
-extern void disp_temp_type();
+void disp_temp_type();
-extern void disp_step_heat();
+void disp_step_heat();
-extern void disp_desire_temp();
+void disp_desire_temp();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_print_file.h

@@ -49,15 +49,15 @@ typedef struct {
 } LIST_FILE;
 extern LIST_FILE list_file;
 
-extern void disp_gcode_icon(uint8_t file_num);
+void disp_gcode_icon(uint8_t file_num);
-extern void lv_draw_print_file();
+void lv_draw_print_file();
-extern uint32_t lv_open_gcode_file(char *path);
+uint32_t lv_open_gcode_file(char *path);
-extern void lv_gcode_file_read(uint8_t *data_buf);
+void lv_gcode_file_read(uint8_t *data_buf);
-extern void lv_close_gcode_file();
+void lv_close_gcode_file();
-extern void cutFileName(char *path, int len, int bytePerLine, char *outStr);
+void cutFileName(char *path, int len, int bytePerLine, char *outStr);
-extern int ascii2dec_test(char *ascii);
+int ascii2dec_test(char *ascii);
-extern void lv_clear_print_file();
+void lv_clear_print_file();
-extern void lv_gcode_file_seek(uint32_t pos);
+void lv_gcode_file_seek(uint32_t pos);
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_printing.h

@@ -36,17 +36,17 @@ enum {
   STOP
 };
 
-extern void lv_draw_printing();
+void lv_draw_printing();
-extern void lv_clear_printing();
+void lv_clear_printing();
-extern void disp_ext_temp();
+void disp_ext_temp();
-extern void disp_bed_temp();
+void disp_bed_temp();
-extern void disp_fan_speed();
+void disp_fan_speed();
-extern void disp_print_time();
+void disp_print_time();
-extern void disp_fan_Zpos();
+void disp_fan_Zpos();
-extern void reset_print_time();
+void reset_print_time();
-extern void start_print_time();
+void start_print_time();
-extern void stop_print_time();
+void stop_print_time();
-extern void setProBarRate();
+void setProBarRate();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_ready_print.h

@@ -25,14 +25,14 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_ready_print();
+void lv_draw_ready_print();
-extern void mks_disp_test();
+void mks_disp_test();
-extern void disp_Limit_ok();
+void disp_Limit_ok();
-extern void disp_Limit_error();
+void disp_Limit_error();
-extern void disp_det_error();
+void disp_det_error();
-extern void disp_det_ok();
+void disp_det_ok();
-extern void lv_clear_ready_print();
+void lv_clear_ready_print();
-extern void lv_temp_refr();
+void lv_temp_refr();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_set.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_set();
+void lv_draw_set();
-extern void lv_clear_set();
+void lv_clear_set();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_step_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_step_settings();
+void lv_draw_step_settings();
-extern void lv_clear_step_settings();
+void lv_clear_step_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_tmc_current_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_tmc_current_settings();
+void lv_draw_tmc_current_settings();
-extern void lv_clear_tmc_current_settings();
+void lv_clear_tmc_current_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_tmc_step_mode_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_tmc_step_mode_settings();
+void lv_draw_tmc_step_mode_settings();
-extern void lv_clear_tmc_step_mode_settings();
+void lv_clear_tmc_step_mode_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_tool.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_tool();
+void lv_draw_tool();
-extern void lv_clear_tool();
+void lv_clear_tool();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_touch_calibration.h

@@ -25,9 +25,9 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_touch_calibration_screen();
+void lv_draw_touch_calibration_screen();
-extern void lv_clear_touch_calibration_screen();
+void lv_clear_touch_calibration_screen();
-extern void lv_update_touch_calibration_screen();
+void lv_update_touch_calibration_screen();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_tramming_pos_settings.h

@@ -25,8 +25,8 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_tramming_pos_settings();
+void lv_draw_tramming_pos_settings();
-extern void lv_clear_tramming_pos_settings();
+void lv_clear_tramming_pos_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_ui.cpp

@@ -72,7 +72,7 @@ extern bool once_flag;
 extern uint8_t sel_id;
 extern lv_group_t *g;
 
-extern void LCD_IO_WriteData(uint16_t RegValue);
+void LCD_IO_WriteData(uint16_t RegValue);
 
 static const char custom_gcode_command[][100] = {
   "G29N\nM500",

Marlin/src/lcd/extui/lib/mks_ui/draw_ui.h

@@ -442,28 +442,28 @@ extern lv_style_t style_btn_rel;
 
 extern lv_point_t line_points[4][2];
 
-extern void gCfgItems_init();
+void gCfgItems_init();
-extern void ui_cfg_init();
+void ui_cfg_init();
-extern void tft_style_init();
+void tft_style_init();
 extern char *creat_title_text();
-extern void preview_gcode_prehandle(char *path);
+void preview_gcode_prehandle(char *path);
-extern void update_spi_flash();
+void update_spi_flash();
-extern void update_gcode_command(int addr,uint8_t *s);
+void update_gcode_command(int addr,uint8_t *s);
-extern void get_gcode_command(int addr,uint8_t *d);
+void get_gcode_command(int addr,uint8_t *d);
-extern void lv_serial_capt_hook(void *, uint8_t);
+void lv_serial_capt_hook(void *, uint8_t);
-extern void lv_eom_hook(void *);
+void lv_eom_hook(void *);
 #if HAS_GCODE_PREVIEW
-  extern void disp_pre_gcode(int xpos_pixel, int ypos_pixel);
+  void disp_pre_gcode(int xpos_pixel, int ypos_pixel);
 #endif
-extern void GUI_RefreshPage();
+void GUI_RefreshPage();
-extern void clear_cur_ui();
+void clear_cur_ui();
-extern void draw_return_ui();
+void draw_return_ui();
-extern void sd_detection();
+void sd_detection();
-extern void gCfg_to_spiFlah();
+void gCfg_to_spiFlah();
-extern void print_time_count();
+void print_time_count();
-
+
-extern void LV_TASK_HANDLER();
+void LV_TASK_HANDLER();
-extern void lv_ex_line(lv_obj_t *line, lv_point_t *points);
+void lv_ex_line(lv_obj_t *line, lv_point_t *points);
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_wifi.h

@@ -26,9 +26,9 @@
 #endif
 
 
-extern void lv_draw_wifi();
+void lv_draw_wifi();
-extern void lv_clear_wifi();
+void lv_clear_wifi();
-extern void disp_wifi_state();
+void disp_wifi_state();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_wifi_list.h

@@ -25,11 +25,11 @@
   extern "C" { /* C-declarations for C++ */
 #endif
 
-extern void lv_draw_wifi_list();
+void lv_draw_wifi_list();
-extern void lv_clear_wifi_list();
+void lv_clear_wifi_list();
-extern void disp_wifi_list();
+void disp_wifi_list();
-extern void cutWifiName(char *name, int len,char *outStr);
+void cutWifiName(char *name, int len,char *outStr);
-extern void wifi_scan_handle();
+void wifi_scan_handle();
 
 #define NUMBER_OF_PAGE 5
 

Marlin/src/lcd/extui/lib/mks_ui/draw_wifi_settings.h

@@ -28,8 +28,8 @@
 #define WIFI_AP_TEXT  "AP"
 #define WIFI_STA_TEXT "STA"
 
-extern void lv_draw_wifi_settings();
+void lv_draw_wifi_settings();
-extern void lv_clear_wifi_settings();
+void lv_clear_wifi_settings();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/draw_wifi_tips.h

@@ -26,8 +26,8 @@
 #endif
 
 
-extern void lv_draw_wifi_tips();
+void lv_draw_wifi_tips();
-extern void lv_clear_wifi_tips();
+void lv_clear_wifi_tips();
 
 typedef enum {
   TIPS_TYPE_JOINING,

Marlin/src/lcd/extui/lib/mks_ui/pic_manager.h

@@ -154,14 +154,14 @@ typedef struct pic_msg PIC_MSG;
 #define PIC_SIZE_xM   6
 #define FONT_SIZE_xM  2
 
-extern void Pic_Read(uint8_t *Pname, uint8_t *P_Rbuff);
+void Pic_Read(uint8_t *Pname, uint8_t *P_Rbuff);
-extern void Pic_Logo_Read(uint8_t *LogoName,uint8_t *Logo_Rbuff,uint32_t LogoReadsize);
+void Pic_Logo_Read(uint8_t *LogoName,uint8_t *Logo_Rbuff,uint32_t LogoReadsize);
-extern void lv_pic_test(uint8_t *P_Rbuff, uint32_t addr, uint32_t size);
+void lv_pic_test(uint8_t *P_Rbuff, uint32_t addr, uint32_t size);
-extern uint32_t lv_get_pic_addr(uint8_t *Pname);
+uint32_t lv_get_pic_addr(uint8_t *Pname);
-extern void get_spi_flash_data(const char *rec_buf, int offset, int size);
+void get_spi_flash_data(const char *rec_buf, int offset, int size);
-extern void spi_flash_read_test();
+void spi_flash_read_test();
-extern void default_view_Read(uint8_t *default_view_Rbuff, uint32_t default_view_Readsize);
+void default_view_Read(uint8_t *default_view_Rbuff, uint32_t default_view_Readsize);
-extern void flash_view_Read(uint8_t *flash_view_Rbuff, uint32_t flash_view_Readsize);
+void flash_view_Read(uint8_t *flash_view_Rbuff, uint32_t flash_view_Readsize);
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/printer_operation.h

@@ -27,9 +27,9 @@
 
 #define MIN_FILE_PRINTED   100 //5000
 
-extern void printer_state_polling();
+void printer_state_polling();
-extern void filament_pin_setup();
+void filament_pin_setup();
-extern void filament_check();
+void filament_check();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/tft_lvgl_configuration.cpp

@@ -64,13 +64,13 @@ XPT2046 touch;
 #endif
 
 #if HAS_SPI_FLASH_FONT
-  extern void init_gb2312_font();
+  void init_gb2312_font();
 #endif
 
 static lv_disp_buf_t disp_buf;
 lv_group_t*  g;
 #if ENABLED(SDSUPPORT)
-  extern void UpdateAssets();
+  void UpdateAssets();
 #endif
 uint16_t DeviceCode = 0x9488;
 extern uint8_t sel_id;
@@ -190,9 +190,7 @@ void tft_lvgl_init() {
   #endif
 
   tft_style_init();
-
   filament_pin_setup();
-
   lv_encoder_pin_init();
 
   TERN_(MKS_WIFI_MODULE, mks_wifi_firmware_update());
@@ -211,7 +209,7 @@ void tft_lvgl_init() {
 
       strncpy(public_buf_m, recovery.info.sd_filename, sizeof(public_buf_m));
       card.printLongPath(public_buf_m);
-      strncpy(list_file.long_name[sel_id], card.longFilename, sizeof(list_file.long_name[sel_id]));
+      strncpy(list_file.long_name[sel_id], card.longFilename, sizeof(list_file.long_name[0]));
       lv_draw_printing();
     }
   #endif

Marlin/src/lcd/extui/lib/mks_ui/tft_lvgl_configuration.h

@@ -37,32 +37,32 @@
 extern uint8_t bmp_public_buf[14 * 1024];
 extern uint8_t public_buf[513];
 
-extern void tft_lvgl_init();
+void tft_lvgl_init();
-extern void my_disp_flush(lv_disp_drv_t * disp, const lv_area_t * area, lv_color_t * color_p);
+void my_disp_flush(lv_disp_drv_t * disp, const lv_area_t * area, lv_color_t * color_p);
-extern bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data);
+bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data);
-extern bool my_mousewheel_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
+bool my_mousewheel_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
 
-extern void LCD_Clear(uint16_t Color);
+void LCD_Clear(uint16_t Color);
-extern void tft_set_point(uint16_t x, uint16_t y, uint16_t point);
+void tft_set_point(uint16_t x, uint16_t y, uint16_t point);
-extern void LCD_setWindowArea(uint16_t StartX, uint16_t StartY, uint16_t width, uint16_t heigh);
+void LCD_setWindowArea(uint16_t StartX, uint16_t StartY, uint16_t width, uint16_t heigh);
-extern void LCD_WriteRAM_Prepare();
+void LCD_WriteRAM_Prepare();
-extern void lcd_draw_logo();
+void lcd_draw_logo();
-extern void lv_encoder_pin_init();
+void lv_encoder_pin_init();
-extern void lv_update_encoder();
+void lv_update_encoder();
 
-extern lv_fs_res_t spi_flash_open_cb (lv_fs_drv_t * drv, void * file_p, const char * path, lv_fs_mode_t mode);
+lv_fs_res_t spi_flash_open_cb(lv_fs_drv_t * drv, void * file_p, const char * path, lv_fs_mode_t mode);
-extern lv_fs_res_t spi_flash_close_cb (lv_fs_drv_t * drv, void * file_p);
+lv_fs_res_t spi_flash_close_cb(lv_fs_drv_t * drv, void * file_p);
-extern lv_fs_res_t spi_flash_read_cb (lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
+lv_fs_res_t spi_flash_read_cb(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
-extern lv_fs_res_t spi_flash_seek_cb(lv_fs_drv_t * drv, void * file_p, uint32_t pos);
+lv_fs_res_t spi_flash_seek_cb(lv_fs_drv_t * drv, void * file_p, uint32_t pos);
-extern lv_fs_res_t spi_flash_tell_cb(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);
+lv_fs_res_t spi_flash_tell_cb(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);
 
-extern lv_fs_res_t sd_open_cb (lv_fs_drv_t * drv, void * file_p, const char * path, lv_fs_mode_t mode);
+lv_fs_res_t sd_open_cb(lv_fs_drv_t * drv, void * file_p, const char * path, lv_fs_mode_t mode);
-extern lv_fs_res_t sd_close_cb (lv_fs_drv_t * drv, void * file_p);
+lv_fs_res_t sd_close_cb(lv_fs_drv_t * drv, void * file_p);
-extern lv_fs_res_t sd_read_cb (lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
+lv_fs_res_t sd_read_cb(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
-extern lv_fs_res_t sd_seek_cb(lv_fs_drv_t * drv, void * file_p, uint32_t pos);
+lv_fs_res_t sd_seek_cb(lv_fs_drv_t * drv, void * file_p, uint32_t pos);
-extern lv_fs_res_t sd_tell_cb(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);
+lv_fs_res_t sd_tell_cb(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);
 
-extern void lv_fill_rect(lv_coord_t x1, lv_coord_t y1, lv_coord_t x2, lv_coord_t y2, lv_color_t bk_color);
+void lv_fill_rect(lv_coord_t x1, lv_coord_t y1, lv_coord_t x2, lv_coord_t y2, lv_color_t bk_color);
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/tft_multi_language.h

@@ -29,7 +29,7 @@
 #include "tft_Language_sp.h"
 #include "tft_Language_it.h"
 
-extern void disp_language_init();
+void disp_language_init();
 
 #define LANG_SIMPLE_CHINESE    1
 #define LANG_COMPLEX_CHINESE   2

Marlin/src/lcd/extui/lib/mks_ui/wifi_module.h

@@ -181,16 +181,16 @@ extern WIFI_GCODE_BUFFER espGcodeFifo;
 extern uint32_t  getWifiTick();
 extern uint32_t  getWifiTickDiff(int32_t lastTick, int32_t curTick);
 
-extern void mks_esp_wifi_init();
+void mks_esp_wifi_init();
 extern int  cfg_cloud_flag;
 extern int  send_to_wifi(uint8_t *buf, int len);
-extern void wifi_looping();
+void wifi_looping();
 extern int  raw_send_to_wifi(uint8_t *buf, int len);
 extern int  package_to_wifi(WIFI_RET_TYPE type, uint8_t *buf, int len);
-extern void get_wifi_list_command_send();
+void get_wifi_list_command_send();
-extern void get_wifi_commands();
+void get_wifi_commands();
 extern int  readWifiBuf(int8_t *buf, int32_t len);
-extern void mks_wifi_firmware_update();
+void mks_wifi_firmware_update();
 
 #ifdef __cplusplus
   } /* C-declarations for C++ */

Marlin/src/lcd/extui/lib/mks_ui/wifi_upload.cpp

@@ -39,9 +39,9 @@ extern SZ_USART_FIFO  WifiRxFifo;
 
 extern int readUsartFifo(SZ_USART_FIFO *fifo, int8_t *buf, int32_t len);
 extern int writeUsartFifo(SZ_USART_FIFO * fifo, int8_t * buf, int32_t len);
-extern void esp_port_begin(uint8_t interrupt);
+void esp_port_begin(uint8_t interrupt);
 extern int usartFifoAvailable(SZ_USART_FIFO *fifo);
-extern void wifi_delay(int n);
+void wifi_delay(int n);
 
 #define ARRAY_SIZE(a) sizeof(a) / sizeof((a)[0])
 

Marlin/src/module/servo.h

@@ -112,4 +112,4 @@
 #define MOVE_SERVO(I, P) servo[I].move(P)
 
 extern HAL_SERVO_LIB servo[NUM_SERVOS];
-extern void servo_init();
+void servo_init();

Marlin/src/module/tool_change.h

@@ -42,7 +42,7 @@
   extern toolchange_settings_t toolchange_settings;
 
   #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)
-    extern void tool_change_prime();
+    void tool_change_prime();
   #endif
 
   #if ENABLED(TOOLCHANGE_FS_PRIME_FIRST_USED)