Acrob005 - História úprav

Balogh na 12:05, 12. jún 2010

2010-06-12T12:05:40Z

← Staršia verzia		Verzia z 12:05, 12. jún 2010
Riadok 1:		Riadok 1:

			[[Acrob004\|< Previous]] \| [[Acrob\|Home]] \| [[Acrob006\|Next >]]

	== Make Music ==		== Make Music ==

Balogh: /* How it works */

2010-06-12T11:58:31Z

How it works

← Staršia verzia		Verzia z 11:58, 12. jún 2010
Riadok 50:		Riadok 50:
	noTone(SPEAKER); // turn off sound.		noTone(SPEAKER); // turn off sound.
	The main (and important) difference is, that here the processor is stalled for 1 second whereas in the first example the sound is generated independently and after the sound start the processor continues with another commands.		The main (and important) difference is, that here the processor is stalled for 1 second whereas in the first example the sound is generated independently and after the sound start the processor continues with another commands.


			'''But how the piezospeaker works?'''

			See http://www.sonitron.be/site/contentpage.php?primid=15

	=== Your turn ===		=== Your turn ===

Balogh: /* How it works */

2010-06-12T11:51:49Z

How it works

← Staršia verzia		Verzia z 11:51, 12. jún 2010
Riadok 40:		Riadok 40:

	At the first line we define symbolic name for the pin to which is the speaker connected. It makes life easier.		At the first line we define symbolic name for the pin to which is the speaker connected. It makes life easier.
	For generating tones there is a command (not surprisingly) <TT>tone</TT> Its first parameter is name of the pin where the sound should be sent. Second parameter is a frequency in [Hz] of the tone and (optional) third parameter is the length of the tone		For generating tones there is a command (not surprisingly) <TT>tone</TT> Its first parameter is name of the pin where the sound should be sent. Second parameter is a frequency in [Hz] of the tone and (optional) third parameter is the length of the tone. Following example plays tone of the frequency
			4000 Hz (4kHz) for period of 1 second.

	tone(SPEAKER, 4000, 1000); // 4kHz, 1 sec.		tone(SPEAKER, 4000, 1000); // 4kHz, 1 sec.

	~~delay(500); //small pause~~		It is not necessary to specify the length of the tone, then it sounds until another command changes its state. The example below does the same as the previous one.

	~~// Example 2:~~ tone ~~of specified frequency without duration~~

	tone(SPEAKER, 2000); // 2kHz, forever		tone(SPEAKER, 2000); // 2kHz, forever
	delay(1000);		delay(1000);
	noTone(SPEAKER); // turn off sound.		noTone(SPEAKER); // turn off sound.
	}		The main (and important) difference is, that here the processor is stalled for 1 second whereas in the first example the sound is generated independently and after the sound start the processor continues with another commands.

	~~void loop~~()
	{
	~~/* do nothing */~~
	}

	=== Your turn ===		=== Your turn ===

Balogh: /* How it works */

2010-06-12T11:40:28Z

How it works

← Staršia verzia		Verzia z 11:40, 12. jún 2010
Riadok 35:		Riadok 35:

	=== How it works ===		=== How it works ===

			First, notice that we don't have anything in the loop section. This is OK, as we need just one tone, not
			eternal noisemaking board.

			At the first line we define symbolic name for the pin to which is the speaker connected. It makes life easier.
			For generating tones there is a command (not surprisingly) <TT>tone</TT> Its first parameter is name of the pin where the sound should be sent. Second parameter is a frequency in [Hz] of the tone and (optional) third parameter is the length of the tone
			tone(SPEAKER, 4000, 1000); // 4kHz, 1 sec.

			delay(500); //small pause

			// Example 2: tone of specified frequency without duration

			tone(SPEAKER, 2000); // 2kHz, forever
			delay(1000);
			noTone(SPEAKER); // turn off sound.
			}

			void loop()
			{
			/* do nothing */
			}

	=== Your turn ===		=== Your turn ===

Balogh: /* Why robot needs to play music? */

2010-06-12T11:30:23Z

Why robot needs to play music?

@@ Riadok 35: / Riadok 35: @@
 === How it works ===
 === Why robot needs to play music? ===
 === Advanced example ===

Balogh: /* Make Music */

2010-06-12T10:13:54Z

Make Music

← Staršia verzia		Verzia z 10:13, 12. jún 2010
Riadok 11:		Riadok 11:
	void setup()		void setup()
	{		{

	// Example 1: tone of specified frequency and duration		// Example 1: tone of specified frequency and duration

Riadok 16:		Riadok 17:

	delay(500); //small pause		delay(500); //small pause

			// Example 2: tone of specified frequency without duration

	tone(SPEAKER, ~~3000~~); // 2kHz, forever		tone(SPEAKER, 2000); // 2kHz, forever
	delay(1000);		delay(1000);
	noTone(SPEAKER); // turn off sound.		noTone(SPEAKER); // turn off sound.

Balogh: /* Advanced example */

2010-06-12T10:12:10Z

Advanced example

← Staršia verzia		Verzia z 10:12, 12. jún 2010
Riadok 41:		Riadok 41:

	<source lang="cpp">		<source lang="cpp">

	#define SPEAKER_Pin 4		#define SPEAKER_Pin 4

Riadok 49:		Riadok 48:
	int tempo = 300;		int tempo = 300;

	void playTone(int tone, int duration)		void playTone(int tone, int duration)
	{		{
	for (long i = 0; i < duration * 1000L; i += tone * 2)		for (long i = 0; i < duration * 1000L; i += tone * 2)
	{		{
	digitalWrite(~~speakerPin~~, HIGH);		digitalWrite(SPEAKER_Pin, HIGH);
	delayMicroseconds(tone);		delayMicroseconds(tone);
	digitalWrite(~~speakerPin~~, LOW);		digitalWrite(SPEAKER_Pin, LOW);
	delayMicroseconds(tone);		delayMicroseconds(tone);
	}		}
Riadok 61:		Riadok 60:


	void playNote(char note, int duration)		void playNote(char note, int duration)
	{		{
	char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };		char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
Riadok 76:		Riadok 75:


	void setup()		void setup()
	{		{
	pinMode(~~speakerPin~~, OUTPUT);		pinMode(SPEAKER_Pin, OUTPUT);
	}		}


	void loop()		void loop()
	{		{
	for (int i = 0; i < length; i++) {		for (int i = 0; i < length; i++) {
Riadok 92:		Riadok 91:

	// pause between notes		// pause between notes
	delay(tempo / 2);		delay(tempo / 2);
	}		}
	}		}

	</source>		</source>


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Balogh: /* Advanced example */

2010-06-12T10:09:54Z

Advanced example

Zobraziť rozdiely

Balogh: /* Advanced example */

2010-06-12T10:04:55Z

Advanced example

@@ Riadok 40: / Riadok 40: @@
 with just one minor (but important) change:  variable <TT>tone</TT> is renamed to <TT>note</TT> as the name tone
 makes collision with the same command.
 <source lang="cpp">
@@ Riadok 192: / Riadok 195: @@
 </source>

Balogh: /* Make Music */

2010-06-12T09:55:17Z

Make Music

← Staršia verzia		Verzia z 09:55, 12. jún 2010
Riadok 7:		Riadok 7:

	<source lang="cpp">		<source lang="cpp">
	#define SPEAKER 9 // Piezospeaker connected to pin 9		#define SPEAKER 4 // Piezospeaker connected to pin 4

	void setup()		void setup()