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Does Processing read Serial port constantly?

[1 Reply]
- 28-Mar-2013 02:29 AM
- Forum: Core Library Questions
This is my Processing code
2. import processing.serial.*;
3. import ddf.minim.*;
5. Serial port;
6. Minim minim;
7. AudioPlayer player;
9. void setup()
10. {
11. size(512, 200, P3D);
12. println("Available serial ports:");
13. println(Serial.list());
15. port = new Serial(this, Serial.list()[0], 19200);
16. // we pass this to Minim so that it can load files from the data directory
17. minim = new Minim(this);
19. // loadFile will look in all the same places as loadImage does.
20. // this means you can find files that are in the data folder and the
21. // sketch folder. you can also pass an absolute path, or a URL.
22. player = minim.loadFile("espressomachine.mp3");
24. // play the file
25. }
27. void draw()
28. {
29. char inByte = port.readChar();
30. println("received char: "+ inByte);
31. if( inByte == '!' )
32. {
33. player.play();
34. }
35. }
37. void stop()
38. {
39. super.stop();
40. }
This is my Arduino code:
1. // If you're using Arduino 1.0 uncomment the next line:
2. #include "SoftwareSerial.h"
3. // If you're using Arduino 23 or earlier, uncomment the next line:
4. //#include "NewSoftSerial.h"
6. #include "Adafruit_Thermal.h"
7. #include "trollface.h"
8. #include "shots.h"
9. #include <avr/pgmspace.h>
11. const int buttonPin = 4; // the number of the pushbutton pin
12. const int ledPin = 13; // the number of the LED pin
13. int buttonState = 0; // variable for reading the pushbutton status
15. int printer_RX_Pin = 2; // This is the green wire
16. int printer_TX_Pin = 3; // This is the yellow wire
18. Adafruit_Thermal printer(printer_RX_Pin, printer_TX_Pin);
21. void setup(){
22. Serial.begin(19200);
23. // initialize the LED pin as an output:
24. pinMode(ledPin, OUTPUT);
25. // initialize the pushbutton pin as an input:
26. pinMode(buttonPin, INPUT);
28. }
30. void loop(){
31. // read the state of the pushbutton value:
32. buttonState = digitalRead(buttonPin);
34. // check if the pushbutton is pressed.
35. // if it is, the buttonState is HIGH:
36. if (buttonState == HIGH) {
37. // turn LED on:
38. // send the string "Knock!" back to the computer, followed by newline
39. digitalWrite(ledPin, HIGH);
41. printer.begin();
43. printer.printBitmap(shots_width, shots_height, shots_data);
44. printer.justify('L');
45. printer.setLineHeight(50);
46. printer.boldOn();
47. printer.println("Welcome to Shots");
48. printer.println("The Machine is now making:");
49. printer.boldOff();
50. printer.setSize('L');
51. printer.println("Latte");
52. printer.println("Total: $6.50");
53. printer.setSize('S');
54. printer.setLineHeight(0);
55. printer.println("Please wait while our machine");
56. printer.println("does its thang.");
57. printer.feed(1);
59. delay(100);
60. Serial.print("print!");
61. Serial.write(5);
62. delay(10000);
64. printer.printBitmap(trollface_width, trollface_height, trollface_data);
65. printer.setLineHeight(50);
66. printer.println("Just kidding.");
67. printer.setSize('L');
68. printer.setLineHeight(0);
69. printer.println("April Fools'!");
70. printer.setSize('S');
71. printer.println("Redeem your free coffee!");
72. printer.feed(1);
74. printer.sleep(); // Tell printer to sleep
75. printer.wake(); // MUST call wake() before printing again, even if reset
76. printer.setDefault(); // Restore printer to defaults
78. }
79. else {
80. // turn LED off:
81. digitalWrite(ledPin, LOW);
82. }
83. }
Basically what I'm trying to do is for someone to press a button (read by arduino) and print something on a thermal printer and play a piece of music on the computer at the same time. So far it works for the 1st time, but when I press the button a second time, the serial prints, but Processing doesn't play the file again. I'm not sure which part of the code is going wrong. Would be super grateful for some help here!

How do I Record Line in and an mp3 together in the same track?

[0 Replies]
- 15-Nov-2011 03:57 PM
- Forum: Core Library Questions
How do I Record Line in and an mp3 together in the same track with reference to Minim Record Line In by Damien Di Fede?
Also how do I change the recording destination to desktop, does anyone know?

This is the code I'm referring to. I'm quite a beginner, so apologies if it is a dumb question!

/**

* Record Line In

* by Damien Di Fede.

*

* This sketch demonstrates how to an <code>AudioRecorder</code>

* to record audio to disk. To use this sketch you need to have

* something plugged into the line-in on your computer. Press 'r'

* to toggle recording on and off and the press 's' to save to disk.

* The recorded file will be placed in the sketch folder of

* the sketch.

*/

import ddf.minim.*;

Minim minim;

AudioInput in;

AudioRecorder recorder;

void setup()

{

size(512, 200, P2D);

textMode(SCREEN);



minim = new Minim(this);

// get a stereo line-in: sample buffer length of 2048

// default sample rate is 44100, default bit depth is 16

in = minim.getLineIn(Minim.STEREO, 2048);

// create a recorder that will record from the input to the filename specified, using buffered recording

// buffered recording means that all captured audio will be written into a sample buffer

// then when save() is called, the contents of the buffer will actually be written to a file

// the file will be located in the sketch's root folder.

recorder = minim.createRecorder(in, "DissertationFeedback.wav", true);



textFont(createFont("SanSerif", 12));

}

void draw()

{

background(0);

stroke(255);

// draw the waveforms

// the values returned by left.get() and right.get() will be between -1 and 1,

// so we need to scale them up to see the waveform

for(int i = 0; i < in.bufferSize() - 1; i++)

{

line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);

line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);

}



if ( recorder.isRecording() )

{

text("Currently recording...", 5, 15);

}

else

{

text("Not recording.", 5, 15);

}

}

void keyReleased()

{

if ( key == 'r' )

{

// to indicate that you want to start or stop capturing audio data, you must call

// beginRecord() and endRecord() on the AudioRecorder object. You can start and stop

// as many times as you like, the audio data will be appended to the end of the buffer

// (in the case of buffered recording) or to the end of the file (in the case of streamed recording).

if ( recorder.isRecording() )

{

recorder.endRecord();

}

else

{

recorder.beginRecord();

}

}

if ( key == 's' )

{

// we've filled the file out buffer,

// now write it to the file we specified in createRecorder

// in the case of buffered recording, if the buffer is large,

// this will appear to freeze the sketch for sometime

// in the case of streamed recording,

// it will not freeze as the data is already in the file and all that is being done

// is closing the file.

// the method returns the recorded audio as an AudioRecording,

// see the example AudioRecorder >> RecordAndPlayback for more about that

recorder.save();

println("Done saving.");

}

}

void stop()

{

// always close Minim audio classes when you are done with them

in.close();

minim.stop();



super.stop();

}

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