Drop C-style 'void' argument

Marlin/src/lcd/extensible_ui/lib/dgus/DGUSDisplay.cpp

@@ -103,7 +103,7 @@ public:
   // ISR for Rx
   void store_rxd_char();
   // ISR for Tx (UDRE vector)
-  void tx_udr_empty_irq(void);
+  void tx_udr_empty_irq();
 
   inline volatile bool is_rx_overrun() {
     return dgus_rx_overrun;
@@ -1013,7 +1013,7 @@ FORCE_INLINE void DGUSSerial::store_rxd_char() {
 }
 
 // (called with TX irqs disabled)
-FORCE_INLINE void DGUSSerial::tx_udr_empty_irq(void) {
+FORCE_INLINE void DGUSSerial::tx_udr_empty_irq() {
   // Read positions
   uint8_t t = tx_buffer.tail;
   const uint8_t h = tx_buffer.head;
@@ -1039,7 +1039,7 @@ FORCE_INLINE void DGUSSerial::tx_udr_empty_irq(void) {
   if (h == t) CBI(DGUS_UCSRxB, UDRIEx);
 }
 
-r_ring_buffer_pos_t DGUSSerial::available(void) {
+r_ring_buffer_pos_t DGUSSerial::available() {
   const r_ring_buffer_pos_t h = atomic_read_rx_head(), t = rx_buffer.tail;
   return (r_ring_buffer_pos_t) (DGUS_RX_BUFFER_SIZE + h - t) & (DGUS_RX_BUFFER_SIZE - 1);
 }

Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/commands.cpp

@@ -29,11 +29,11 @@
 using namespace FTDI;
 using namespace FTDI::SPI;
 
-void CLCD::enable(void) {
+void CLCD::enable() {
   mem_write_8(REG::PCLK, Pclk);
 }
 
-void CLCD::disable(void) {
+void CLCD::disable() {
   mem_write_8(REG::PCLK, 0x00);
 }
 
@@ -45,7 +45,7 @@ uint8_t CLCD::get_brightness() {
   return mem_read_8(REG::PWM_DUTY);
 }
 
-void CLCD::turn_on_backlight(void) {
+void CLCD::turn_on_backlight() {
   mem_write_8(REG::PWM_DUTY, 128);
 }
 
@@ -1052,7 +1052,7 @@ void CLCD::CommandFifo::str(progmem_str data) {
 
 /******************* LCD INITIALIZATION ************************/
 
-void CLCD::init(void) {
+void CLCD::init() {
   spi_init();                                  // Set Up I/O Lines for SPI and FT800/810 Control
   ftdi_reset();                                // Power down/up the FT8xx with the apropriate delays
 

Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/commands.h

@@ -124,12 +124,12 @@ class CLCD {
     class CommandFifo;
     class FontMetrics;
 
-    static void init(void);
-    static void default_touch_transform(void);
-    static void default_display_orientation(void);
-    static void turn_on_backlight(void);
-    static void enable(void);
-    static void disable(void);
+    static void init();
+    static void default_touch_transform();
+    static void default_display_orientation();
+    static void turn_on_backlight();
+    static void enable();
+    static void disable();
     static void set_brightness (uint8_t brightness);
     static uint8_t get_brightness();
     static void host_cmd (unsigned char host_command, unsigned char byte2);
@@ -179,7 +179,7 @@ class CLCD::CommandFifo {
       static uint32_t command_write_ptr;
       template <class T> bool _write_unaligned(T data, uint16_t len);
     #endif
-    void start(void);
+    void start();
 
   public:
     template <class T> bool write(T data, uint16_t len);
@@ -187,11 +187,11 @@ class CLCD::CommandFifo {
   public:
     CommandFifo() {start();}
 
-    static void reset(void);
+    static void reset();
     static bool is_processing();
     static bool has_fault();
 
-    void execute(void);
+    void execute();
 
     void cmd(uint32_t cmd32);
     void cmd(void* data, uint16_t len);

Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/spi.cpp

@@ -31,7 +31,7 @@ namespace FTDI {
     SPISettings SPI::spi_settings(SPI_FREQUENCY, MSBFIRST, SPI_MODE0);
   #endif
 
-  void SPI::spi_init(void) {
+  void SPI::spi_init() {
     SET_OUTPUT(CLCD_MOD_RESET); // Module Reset (a.k.a. PD, not SPI)
     WRITE(CLCD_MOD_RESET, 0); // start with module in power-down
 
@@ -106,7 +106,7 @@ namespace FTDI {
   }
 
   // CLCD SPI - Chip Select
-  void SPI::spi_ftdi_select(void) {
+  void SPI::spi_ftdi_select() {
     #ifndef CLCD_USE_SOFT_SPI
       ::SPI.beginTransaction(spi_settings);
     #endif
@@ -115,7 +115,7 @@ namespace FTDI {
   }
 
   // CLCD SPI - Chip Deselect
-  void SPI::spi_ftdi_deselect(void) {
+  void SPI::spi_ftdi_deselect() {
     WRITE(CLCD_SPI_CS, 1);
     #ifndef CLCD_USE_SOFT_SPI
       ::SPI.endTransaction();
@@ -142,7 +142,7 @@ namespace FTDI {
   #endif
 
   // Not really a SPI signal...
-  void SPI::ftdi_reset(void) {
+  void SPI::ftdi_reset() {
     WRITE(CLCD_MOD_RESET, 0);
     delay(6); /* minimum time for power-down is 5ms */
     WRITE(CLCD_MOD_RESET, 1);
@@ -150,7 +150,7 @@ namespace FTDI {
   }
 
   // Not really a SPI signal...
-  void SPI::test_pulse(void) {
+  void SPI::test_pulse() {
     #ifdef CLCD_AUX_0
       WRITE(CLCD_AUX_0, 1);
       delayMicroseconds(10);

Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/spi.h

@@ -122,7 +122,7 @@ namespace FTDI {
     void spi_read_bulk(      void *data, uint16_t len);
     bool spi_verify_bulk(const void *data, uint16_t len);
 
-    void ftdi_reset(void);
-    void test_pulse(void);
+    void ftdi_reset();
+    void test_pulse();
   }
 }

Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/screen_types.h

@@ -54,11 +54,11 @@ typedef enum {
 
 class ScreenRef {
   protected:
-    typedef void onStartup_func_t(void);
-    typedef void onEntry_func_t(void);
-    typedef void onExit_func_t(void);
-    typedef void onIdle_func_t(void);
-    typedef void onRefresh_func_t(void);
+    typedef void onStartup_func_t();
+    typedef void onEntry_func_t();
+    typedef void onExit_func_t();
+    typedef void onIdle_func_t();
+    typedef void onRefresh_func_t();
     typedef void onRedraw_func_t(draw_mode_t);
     typedef bool onTouchStart_func_t(uint8_t);
     typedef bool onTouchHeld_func_t(uint8_t);