Reduce unused function warnings

Marlin/src/HAL/HAL_AVR/HAL.h

@@ -114,9 +114,12 @@ void HAL_init(void);
 inline void HAL_clear_reset_source(void) { MCUSR = 0; }
 inline uint8_t HAL_get_reset_source(void) { return MCUSR; }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 extern "C" {
   int freeMemory(void);
 }
+#pragma GCC diagnostic pop
 
 // timers
 #define HAL_TIMER_RATE          ((F_CPU) / 8)    // i.e., 2MHz or 2.5MHz

Marlin/src/HAL/HAL_DUE/HAL.h

@@ -156,12 +156,16 @@ void HAL_init(void);
 // Utility functions
 //
 void _delay_ms(const int delay);
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 int freeMemory(void);
+#pragma GCC diagnostic pop
 
 #ifdef __cplusplus
   extern "C" {
 #endif
-char *dtostrf (double __val, signed char __width, unsigned char __prec, char *__s);
+char *dtostrf(double __val, signed char __width, unsigned char __prec, char *__s);
 #ifdef __cplusplus
   }
 #endif

Marlin/src/HAL/HAL_ESP32/HAL.h

@@ -92,7 +92,10 @@ uint8_t HAL_get_reset_source(void);
 
 void _delay_ms(int delay);
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 int freeMemory(void);
+#pragma GCC diagnostic pop
 
 void analogWrite(pin_t pin, int value);
 

Marlin/src/HAL/HAL_LINUX/HAL.h

@@ -81,7 +81,10 @@ extern HalSerial usb_serial;
 inline void HAL_init(void) { }
 
 // Utility functions
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 int freeMemory(void);
+#pragma GCC diagnostic pop
 
 // SPI: Extended functions which take a channel number (hardware SPI only)
 /** Write single byte to specified SPI channel */

Marlin/src/HAL/HAL_LPC1768/HAL.h

@@ -111,7 +111,10 @@ extern "C" volatile uint32_t _millis;
 //
 // Utility functions
 //
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 int freeMemory(void);
+#pragma GCC diagnostic pop
 
 //
 // SPI: Extended functions taking a channel number (Hardware SPI only)

Marlin/src/HAL/HAL_SAMD51/HAL.h

@@ -132,11 +132,17 @@ void noTone(const pin_t _pin);
 
 // Enable hooks into idle and setup for HAL
 void HAL_init(void);
-/*#define HAL_IDLETASK 1
-void HAL_idletask(void);*/
+/*
+#define HAL_IDLETASK 1
+void HAL_idletask(void);
+*/
 
 //
 // Utility functions
 //
 FORCE_INLINE void _delay_ms(const int delay_ms) { delay(delay_ms); }
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 int freeMemory(void);
+#pragma GCC diagnostic pop

Marlin/src/HAL/HAL_STM32/HAL.h

@@ -136,7 +136,7 @@ typedef int16_t pin_t;
 // Public Variables
 // ------------------------
 
-/** result of last ADC conversion */
+// result of last ADC conversion
 extern uint16_t HAL_adc_result;
 
 // ------------------------
@@ -149,30 +149,35 @@ extern uint16_t HAL_adc_result;
 // Enable hooks into  setup for HAL
 void HAL_init(void);
 
-/** clear reset reason */
+// Clear reset reason
 void HAL_clear_reset_source (void);
 
-/** reset reason */
+// Reset reason
 uint8_t HAL_get_reset_source(void);
 
 void _delay_ms(const int delay);
 
 extern "C" char* _sbrk(int incr);
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+
 static inline int freeMemory() {
   volatile char top;
   return &top - reinterpret_cast<char*>(_sbrk(0));
 }
 
+#pragma GCC diagnostic pop
+
 //
 // SPI: Extended functions which take a channel number (hardware SPI only)
 //
 
-/** Write single byte to specified SPI channel */
+// Write single byte to specified SPI channel
 void spiSend(uint32_t chan, byte b);
-/** Write buffer to specified SPI channel */
+// Write buffer to specified SPI channel
 void spiSend(uint32_t chan, const uint8_t* buf, size_t n);
-/** Read single byte from specified SPI channel */
+// Read single byte from specified SPI channel
 uint8_t spiRec(uint32_t chan);
 
 //
@@ -182,8 +187,8 @@ uint8_t spiRec(uint32_t chan);
 // Wire library should work for i2c EEPROMs
 void eeprom_write_byte(uint8_t *pos, unsigned char value);
 uint8_t eeprom_read_byte(uint8_t *pos);
-void eeprom_read_block (void *__dst, const void *__src, size_t __n);
-void eeprom_update_block (const void *__src, void *__dst, size_t __n);
+void eeprom_read_block(void *__dst, const void *__src, size_t __n);
+void eeprom_update_block(const void *__src, void *__dst, size_t __n);
 
 //
 // ADC

Marlin/src/HAL/HAL_STM32F1/HAL.h

@@ -158,7 +158,7 @@ typedef int8_t pin_t;
 // Public Variables
 // ------------------------
 
-/** result of last ADC conversion */
+// Result of last ADC conversion
 extern uint16_t HAL_adc_result;
 
 // ------------------------
@@ -174,14 +174,17 @@ extern uint16_t HAL_adc_result;
 // Memory related
 #define __bss_end __bss_end__
 
-/** clear reset reason */
+// Clear reset reason
 void HAL_clear_reset_source(void);
 
-/** reset reason */
+// Reset reason
 uint8_t HAL_get_reset_source(void);
 
 void _delay_ms(const int delay);
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+
 /*
 extern "C" {
   int freeMemory(void);
@@ -189,6 +192,7 @@ extern "C" {
 */
 
 extern "C" char* _sbrk(int incr);
+
 /*
 static int freeMemory() {
   volatile int top;
@@ -197,9 +201,6 @@ static int freeMemory() {
 }
 */
 
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-function"
-
 static int freeMemory() {
   volatile char top;
   return &top - reinterpret_cast<char*>(_sbrk(0));
@@ -211,11 +212,11 @@ static int freeMemory() {
 // SPI: Extended functions which take a channel number (hardware SPI only)
 //
 
-/** Write single byte to specified SPI channel */
+// Write single byte to specified SPI channel
 void spiSend(uint32_t chan, byte b);
-/** Write buffer to specified SPI channel */
+// Write buffer to specified SPI channel
 void spiSend(uint32_t chan, const uint8_t* buf, size_t n);
-/** Read single byte from specified SPI channel */
+// Read single byte from specified SPI channel
 uint8_t spiRec(uint32_t chan);
 
 //

Marlin/src/HAL/HAL_STM32_F4_F7/HAL.h

@@ -37,7 +37,7 @@
 
 #include <stdint.h>
 
-#ifdef defined(STM32F4) && USBCON
+#if defined(STM32F4) && USBCON
   #include <USBSerial.h>
 #endif
 
@@ -100,8 +100,6 @@
   #define NUM_SERIAL 1
 #endif
 
-#define _BV(b) (1 << (b))
-
 /**
  * TODO: review this to return 1 for pins that are not analog input
  */
@@ -142,7 +140,7 @@ typedef int8_t pin_t;
 // Public Variables
 // ------------------------
 
-/** result of last ADC conversion */
+// Result of last ADC conversion
 extern uint16_t HAL_adc_result;
 
 // ------------------------
@@ -154,14 +152,17 @@ extern uint16_t HAL_adc_result;
 
 inline void HAL_init(void) { }
 
-/** clear reset reason */
+// Clear reset reason
 void HAL_clear_reset_source (void);
 
-/** reset reason */
+// Reset reason
 uint8_t HAL_get_reset_source(void);
 
 void _delay_ms(const int delay);
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+
 /*
 extern "C" {
   int freeMemory(void);
@@ -183,15 +184,17 @@ static int freeMemory() {
   return &top - reinterpret_cast<char*>(_sbrk(0));
 }
 
+#pragma GCC diagnostic pop
+
 //
 // SPI: Extended functions which take a channel number (hardware SPI only)
 //
 
-/** Write single byte to specified SPI channel */
+// Write single byte to specified SPI channel
 void spiSend(uint32_t chan, byte b);
-/** Write buffer to specified SPI channel */
+// Write buffer to specified SPI channel
 void spiSend(uint32_t chan, const uint8_t* buf, size_t n);
-/** Read single byte from specified SPI channel */
+// Read single byte from specified SPI channel
 uint8_t spiRec(uint32_t chan);
 
 //

Marlin/src/HAL/HAL_TEENSY31_32/HAL.h

@@ -97,9 +97,12 @@ uint8_t HAL_get_reset_source(void);
 
 FORCE_INLINE void _delay_ms(const int delay_ms) { delay(delay_ms); }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 extern "C" {
   int freeMemory(void);
 }
+#pragma GCC diagnostic pop
 
 // SPI: Extended functions which take a channel number (hardware SPI only)
 

Marlin/src/HAL/HAL_TEENSY35_36/HAL.h

@@ -95,24 +95,27 @@ typedef int8_t pin_t;
 
 inline void HAL_init(void) { }
 
-/** clear reset reason */
+// Clear reset reason
 void HAL_clear_reset_source(void);
 
-/** reset reason */
+// Reset reason
 uint8_t HAL_get_reset_source(void);
 
 FORCE_INLINE void _delay_ms(const int delay_ms) { delay(delay_ms); }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 extern "C" {
   int freeMemory(void);
 }
+#pragma GCC diagnostic pop
 
 // SPI: Extended functions which take a channel number (hardware SPI only)
-/** Write single byte to specified SPI channel */
+// Write single byte to specified SPI channel
 void spiSend(uint32_t chan, byte b);
-/** Write buffer to specified SPI channel */
+// Write buffer to specified SPI channel
 void spiSend(uint32_t chan, const uint8_t* buf, size_t n);
-/** Read single byte from specified SPI channel */
+// Read single byte from specified SPI channel
 uint8_t spiRec(uint32_t chan);
 
 // ADC