Drop C-style 'void' argument

Marlin/src/HAL/HAL_ESP32/FlushableHardwareSerial.h

@@ -29,7 +29,7 @@ class FlushableHardwareSerial : public HardwareSerial {
 public:
   FlushableHardwareSerial(int uart_nr);
 
-  inline void flushTX(void) { /* No need to flush the hardware serial, but defined here for compatibility. */ }
+  inline void flushTX() { /* No need to flush the hardware serial, but defined here for compatibility. */ }
 };
 
 extern FlushableHardwareSerial flushableSerial;

Marlin/src/HAL/HAL_ESP32/HAL.cpp

@@ -78,11 +78,11 @@ volatile int numPWMUsed = 0,
 // Public functions
 // ------------------------
 
-void HAL_init(void) {
+void HAL_init() {
   i2s_init();
 }
 
-void HAL_init_board(void) {
+void HAL_init_board() {
   #if EITHER(EEPROM_SETTINGS, WEBSUPPORT)
     spiffs_init();
   #endif
@@ -99,15 +99,15 @@ void HAL_init_board(void) {
   #endif
 }
 
-void HAL_idletask(void) {
+void HAL_idletask() {
   #if ENABLED(OTASUPPORT)
     OTA_handle();
   #endif
 }
 
-void HAL_clear_reset_source(void) { }
+void HAL_clear_reset_source() { }
 
-uint8_t HAL_get_reset_source(void) { return rtc_get_reset_reason(1); }
+uint8_t HAL_get_reset_source() { return rtc_get_reset_reason(1); }
 
 void _delay_ms(int delay_ms) { delay(delay_ms); }
 

Marlin/src/HAL/HAL_ESP32/HAL.h

@@ -85,16 +85,16 @@ extern uint16_t HAL_adc_result;
 // ------------------------
 
 // clear reset reason
-void HAL_clear_reset_source(void);
+void HAL_clear_reset_source();
 
 // reset reason
-uint8_t HAL_get_reset_source(void);
+uint8_t HAL_get_reset_source();
 
 void _delay_ms(int delay);
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
-int freeMemory(void);
+int freeMemory();
 #pragma GCC diagnostic pop
 
 void analogWrite(pin_t pin, int value);
@@ -108,7 +108,7 @@ void eeprom_update_block (const void *__src, void *__dst, size_t __n);
 // ADC
 #define HAL_ANALOG_SELECT(pin)
 
-void HAL_adc_init(void);
+void HAL_adc_init();
 
 #define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
 #define HAL_READ_ADC()      HAL_adc_result
@@ -123,6 +123,6 @@ void HAL_adc_start_conversion(uint8_t adc_pin);
 // Enable hooks into idle and setup for HAL
 #define HAL_IDLETASK 1
 #define BOARD_INIT() HAL_init_board();
-void HAL_idletask(void);
-void HAL_init(void);
-void HAL_init_board(void);
+void HAL_idletask();
+void HAL_init();
+void HAL_init_board();

Marlin/src/HAL/HAL_ESP32/HAL_SPI.cpp

@@ -80,7 +80,7 @@ void spiInit(uint8_t spiRate) {
   SPI.begin();
 }
 
-uint8_t spiRec(void) {
+uint8_t spiRec() {
   SPI.beginTransaction(spiConfig);
   uint8_t returnByte = SPI.transfer(0xFF);
   SPI.endTransaction();

Marlin/src/HAL/HAL_ESP32/WebSocketSerial.cpp

@@ -66,15 +66,15 @@ ring_buffer_pos_t RingBuffer::write(const uint8_t *buffer, ring_buffer_pos_t siz
   return written;
 }
 
-int RingBuffer::available(void) {
+int RingBuffer::available() {
   return (size - read_index + write_index) & (size - 1);
 }
 
-int RingBuffer::peek(void) {
+int RingBuffer::peek() {
   return available() ? data[read_index] : -1;
 }
 
-int RingBuffer::read(void) {
+int RingBuffer::read() {
   if (available()) {
     const int ret = data[read_index];
     read_index = NEXT_INDEX(read_index, size);
@@ -94,7 +94,7 @@ ring_buffer_pos_t RingBuffer::read(uint8_t *buffer) {
   return len;
 }
 
-void RingBuffer::flush(void) { read_index = write_index; }
+void RingBuffer::flush() { read_index = write_index; }
 
 // WebSocketSerial impl
 WebSocketSerial::WebSocketSerial()
@@ -120,10 +120,10 @@ void WebSocketSerial::begin(const long baud_setting) {
 }
 
 void WebSocketSerial::end() { }
-int WebSocketSerial::peek(void) { return rx_buffer.peek(); }
-int WebSocketSerial::read(void) { return rx_buffer.read(); }
-int WebSocketSerial::available(void) { return rx_buffer.available(); }
-void WebSocketSerial::flush(void) { rx_buffer.flush(); }
+int WebSocketSerial::peek() { return rx_buffer.peek(); }
+int WebSocketSerial::read() { return rx_buffer.read(); }
+int WebSocketSerial::available() { return rx_buffer.available(); }
+void WebSocketSerial::flush() { rx_buffer.flush(); }
 
 size_t WebSocketSerial::write(const uint8_t c) {
   size_t ret = tx_buffer.write(c);
@@ -145,7 +145,7 @@ size_t WebSocketSerial::write(const uint8_t* buffer, size_t size) {
   return written;
 }
 
-void WebSocketSerial::flushTX(void) {
+void WebSocketSerial::flushTX() {
   // No need to do anything as there's no benefit to sending partial lines over the websocket connection.
 }
 

Marlin/src/HAL/HAL_ESP32/WebSocketSerial.h

@@ -45,11 +45,11 @@ public:
   RingBuffer(ring_buffer_pos_t size);
   ~RingBuffer();
 
-  int available(void);
-  int peek(void);
-  int read(void);
+  int available();
+  int peek();
+  int read();
   ring_buffer_pos_t read(uint8_t *buffer);
-  void flush(void);
+  void flush();
   ring_buffer_pos_t write(const uint8_t c);
   ring_buffer_pos_t write(const uint8_t* buffer, ring_buffer_pos_t size);
 };
@@ -62,11 +62,11 @@ public:
   WebSocketSerial();
   void begin(const long);
   void end();
-  int available(void);
-  int peek(void);
-  int read(void);
-  void flush(void);
-  void flushTX(void);
+  int available();
+  int peek();
+  int read();
+  void flush();
+  void flushTX();
   size_t write(const uint8_t c);
   size_t write(const uint8_t* buffer, size_t size);
 

Marlin/src/HAL/HAL_ESP32/endstop_interrupts.h

@@ -38,9 +38,9 @@
 #include "../../module/endstops.h"
 
 // One ISR for all EXT-Interrupts
-void ICACHE_RAM_ATTR endstop_ISR(void) { endstops.update(); }
+void ICACHE_RAM_ATTR endstop_ISR() { endstops.update(); }
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
   #if HAS_X_MAX
     _ATTACH(X_MAX_PIN);

Marlin/src/HAL/HAL_ESP32/timers.h

@@ -79,13 +79,13 @@ typedef uint64_t hal_timer_t;
 #define ENABLE_TEMPERATURE_INTERRUPT()  HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
 
-#define HAL_TEMP_TIMER_ISR() extern "C" void tempTC_Handler(void)
-#define HAL_STEP_TIMER_ISR() extern "C" void stepTC_Handler(void)
-#define HAL_PWM_TIMER_ISR() extern "C" void pwmTC_Handler(void)
+#define HAL_TEMP_TIMER_ISR() extern "C" void tempTC_Handler()
+#define HAL_STEP_TIMER_ISR() extern "C" void stepTC_Handler()
+#define HAL_PWM_TIMER_ISR() extern "C" void pwmTC_Handler()
 
-extern "C" void tempTC_Handler(void);
-extern "C" void stepTC_Handler(void);
-extern "C" void pwmTC_Handler(void);
+extern "C" void tempTC_Handler();
+extern "C" void stepTC_Handler();
+extern "C" void pwmTC_Handler();
 
 // ------------------------
 // Types
@@ -95,7 +95,7 @@ typedef struct {
   timer_group_t  group;
   timer_idx_t    idx;
   uint32_t       divider;
-  void           (*fn)(void);
+  void           (*fn)();
 } tTimerConfig;
 
 // ------------------------

Marlin/src/HAL/HAL_ESP32/watchdog.cpp

@@ -28,11 +28,11 @@
 
 #include "watchdog.h"
 
-void watchdogSetup(void) {
+void watchdogSetup() {
   // do whatever. don't remove this function.
 }
 
-void watchdog_init(void) {
+void watchdog_init() {
   // TODO
 }