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Articles - Arduino - Mini code : Faire sonner un buzzer

Petite code minimaliste et sans fioriture pour faire sonner un buzzer.




/*
note frequency
c 262 Hz
d 294 Hz
e 330 Hz
f 349 Hz
g 392 Hz
a 440 Hz
b 494 Hz
C 523 Hz
*/

const int buzzerPin = 9;

// We'll set up an array with the notes we want to play
// change these values to make different songs!

// Length must equal the total number of notes and spaces

const int songLength = 18;

// Notes is an array of text characters corresponding to the notes
// in your song. A space represents a rest (no tone)

char notes[] = "cdfda ag cdfdg gf "; // a space represents a rest

// Beats is an array of values for each note and rest.
// A "1" represents a quarter-note, 2 a half-note, etc.
// Don't forget that the rests (spaces) need a length as well.

int beats[] = {1,1,1,1,1,1,4,4,2,1,1,1,1,1,1,4,4,2};

// The tempo is how fast to play the song.
// To make the song play faster, decrease this value.

int tempo = 113;


void setup() {
pinMode(buzzerPin, OUTPUT);
}


void loop()
{
int i, duration;

for (i = 0; i < songLength; i++) // step through the song arrays
{
duration = beats[i] * tempo; // length of note/rest in ms

if (notes[i] == ' ') // is this a rest?
{
delay(duration); // then pause for a moment
} else {
tone(buzzerPin, frequency(notes[i]), duration);
delay(duration); // wait for tone to finish
}
delay(tempo/10); // brief pause between notes
}

// We only want to play the song once, so we'll pause forever:
while(true){}
// If you'd like your song to play over and over,
// remove the above statement
}


int frequency(char note)
{
// This function takes a note character (a-g), and returns the
// corresponding frequency in Hz for the tone() function.

int i;
const int numNotes = 8; // number of notes we're storing

// The following arrays hold the note characters and their
// corresponding frequencies. The last "C" note is uppercase
// to separate it from the first lowercase "c". If you want to
// add more notes, you'll need to use unique characters.

// For the "char" (character) type, we put single characters
// in single quotes.

char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
int frequencies[] = {262, 294, 330, 349, 392, 440, 494, 523};

// Now we'll search through the letters in the array, and if
// we find it, we'll return the frequency for that note.

for (i = 0; i < numNotes; i++) // Step through the notes
{
if (names[i] == note) // Is this the one?
{
return(frequencies[i]); // Yes! Return the frequency
}
}
return(0); // We looked through everything and didn't find it,
// but we still need to return a value, so return 0.
}


Par Mister3D le 21/01/2018, vu 874 fois
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