The Arduino copy of example code for tone() function produces a compile error: 'tone' is not declared in this scope. How can I fix this?

Question

It's 32-bit ARM core processor is SAM3X8E ARM Cortex-M3 CPU.

Error:

sketch_nov16b\sketch_nov16b.ino: In function 'void setup()': sketch_nov16b:49:43: error: 'tone' was not declared in this scope tone(8, melody[thisNote], noteDuration); 
^ sketch_nov16b:61:13: error: 'noTone' was not declared in this scope noTone(8); 
^ exit status 1 'tone' was not declared in this scope 

Code:

/*
 Melody
 Plays a melody
 circuit:
 - 8 ohm speaker on digital pin 8
 created 21 Jan 2010
 modified 30 Aug 2011
 by Tom Igoe
 This example code is in the public domain.
 https://www.arduino.cc/en/Tutorial/Tone
*/
#include "pitches.h"
// notes in the melody:
int melody[] = {
 NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
};
// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
 4, 8, 8, 4, 4, 4, 4, 4
};
void setup() {
 // iterate over the notes of the melody:
 for (int thisNote = 0; thisNote < 8; thisNote++) {
 // to calculate the note duration, take one second divided by the note type.
 //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
 int noteDuration = 1000 / noteDurations[thisNote];
 tone(8, melody[thisNote], noteDuration);
 // to distinguish the notes, set a minimum time between them.
 // the note's duration + 30% seems to work well:
 int pauseBetweenNotes = noteDuration * 1.30;
 delay(pauseBetweenNotes);
 // stop the tone playing:
 noTone(8);
 }
}
void loop() {
 // no need to repeat the melody.
}

• Edgar Bonet: What core are you using?
• JohnB: It's 32-bit ARM core processor is SAM3X8E ARM Cortex-M3 CPU
• JohnB: Does this meet jsotola's request?sketch_nov16b\sketch_nov16b.ino: In function 'void setup()': sketch_nov16b:49:43: error: 'tone' was not declared in this scope tone(8, melody[thisNote], noteDuration); ^ sketch_nov16b:61:13: error: 'noTone' was not declared in this scope noTone(8); ^ exit status 1 'tone' was not declared in this scope
• jsotola: @JohnB I said do not paste into a comment and you pasted into a comment ... this site is not a forum ... it is a question and answer site ... all info must be contained in the question

Answer 1

In short, they just never implemented tone() in the Due/SAM core. So you're not going to get the normal tone() function working.

• The tone.h header is empty.
  They probably should done any number of things that would produced a somewhat clearer warning about this.

• The counterpart .cpp file has been renamed to .cpp.disabled so that the no attempt is made to compile it and is full of AVR-based code that they'd copied into the project for reference with the intention of replacing it but never did.

There a github issue tracking this. But it hasn't been updated since 2020. That issue references the Arduino forum for apparently working alternative code for producing tones. So maybe try their code.

I don't see any popular alternative packaged as an Arduino library for producing simple tones. However, the chip has a DAC and there is an Audio Library. It's a bit overkill for producing basic tones, but you could modify the example there to fill the buffer with a tone's waveform rather than loading it from an sdcard file.