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Call and Response Help

[2 Replies]
- 13-Jan-2011 02:40 PM
- Forum: Integration and Hardware
Hi,

I'm trying to do a very simple call and response sketch with processing and arduino. All I want to do is have processing initiate contact with arduino via serial, get a response from arduino, and then every time arduino ask for more data, have processing send another integer and print it out.

My Processing code is:
2. import processing.serial.*;
4. Serial myPort;
5. int inByte;
7. void setup() {
8. myPort = new Serial(this,Serial.list()[0], 9600);
9. establishContact();
10. }
13. void draw() {
14. //while(myPort.available() <= 0) {
15. inByte = myPort.read();
16. if(inByte == 'B') {
17. for (int i=0; i<=5; i++) {
18. myPort.write(i);
19. }
20. }
21. }
22. //}
25. void establishContact() {
26. myPort.write('A');
27. delay(300);
28. }
And the arduino code is:
2. #include <NewSoftSerial.h>
4. boolean firstContact = false;
5. char inByte;
7. void setup() {
8. Serial.begin(9600);
9. }
11. void loop() {
12. //while (Serial.available() > 0){
13. char inByte = Serial.read();
14. if(firstContact == false) {
15. if (inByte == 'A') {
16. //Serial.flush();
17. firstContact = true;
18. delay(300);
19. Serial.write('B');
20. }
21. }
22. else{
23. int inByte = Serial.read();
24. //char val = inByte;
25. Serial.println(inByte);
26. delay(500);
27. Serial.write('B');
28. }
29. //}
30. }
I have found Tom Igoe's example of Call and Response, but it seems to be going in the opposite direction I want. Tried playing with it to turn it around, but no luck. I'm sure it is a ver simple problem, but any help would be really great.

Please Help With Interfacing to Arduino to Print

[0 Replies]
- 13-Jan-2011 05:25 AM
- Forum: Integration and Hardware
Hi all,

I have been really struggling with this problem for a few days now, and have read lots of threads and tutorials with interfacing with processing, but just can't get my sketch to work!?

I'm a bit of a noob, and it is probably something really easy I'm doing wrong, but an help would be appreciated so much.

I am trying to get processing to perform a yahoo search, and then send the result descriptions one at a time to arduino to be printed off. I then want the arduino to send back a "done" signal to processing to get the next description.

With my current code, the first description just keeps printing repeatedly!? Please help someone - getting very infuriated with it.

Processing Code:

import pyahoo.*;

import com.yahoo.search.WebSearchResults;

import processing.serial.*;

Serial port;

boolean done;

// Create a YahooSearch object. You have to pass in the API key given to you by Yahoo.

YahooSearch yahoo;

char [][]target;

void setup() {

  size(200,200);

  port = new Serial(this,Serial.list()[0], 9600);

  // Make a search object, pass in your key

  yahoo = new YahooSearch(this, "B5rzyEvV34EjE7c3OWj3BWOXBrP3f.b3HF9hLPGyB0r5CopLwlFLrvhdw8X1.wQnPE3mtihee94-");

}

void mousePressed() {

  // Search for a String. By default you will get back 10 results.

  // If you want more (or less), you can request a specific number by saying:

  yahoo.search("peter thomas", 5);

}

void draw() {

  noLoop();

}

// When the search is complete

void searchEvent(YahooSearch yahoo) {

  // Get Titles and URLs

  //String[] titles = yahoo.getTitles();

  // Search results arrive as an array of Strings.

  // You can also get the summaries with getSummaries().

  //String[] urls = yahoo.getUrls();

  String[] summaries = yahoo.getSummaries();

  println(summaries);



  int maxSummaryLength = 0;

for (int i=0; i<summaries.length; i++) {

   if ( maxSummaryLength < summaries[i].length()) {

   maxSummaryLength = summaries[i].length();

   }

}

char[][] target = new char[summaries.length][maxSummaryLength];

for (int i=0; i<summaries.length; i++) {

   for (int j=0; j<summaries[i].length(); j++) {



   target[i][j] = summaries[i].charAt(j);

   }



}

for (int k=0; k<summaries[0].length(); k++) {

  port.write(target[0][k]);

  port.clear();

  //delay (1000);

  checkDone();

  if (done == true) {

  port.write(target[1][k]);

   }

   else {

   port.clear();

   //noLoop();

   }

  }

}

void checkDone() {

  boolean done = false;

  if(port.available() > 0) {

   int serVal = port.read();

   if (serVal == 111) {

   done = true;

   }

  }

}

Arduino Code:

#include <SoftwareSerial.h>

#define rxPin 6

#define txPin 7

SoftwareSerial printer = SoftwareSerial(rxPin, txPin);

const byte command = 0x1B;

const byte fullcut = 0x69;

const byte partialcut = 0x6D;

const byte doubleprint = 0x47;

const byte flipchars = 0x7B;

const byte rotatechars = 0x56;

const byte commandBarcode = 0x1D;

const byte commandBarcodePrint = 0x6B;

const byte commandBarcodeWidth = 0x77;

const byte commandBarcodeHeight = 0x68;

const byte commandBarcodeTextPosition = 0x48;

const byte barcodeNarrow = 0x02;

const byte barcodeMedium = 0x03;

const byte barcodeWide = 0x04;

const byte barcodePrintNone = 0x00;

const byte barcodePrintAbove = 0x01;

const byte barcodePrintBelow = 0x02;

const byte barcodePrintBoth = 0x03;

// (0 = UPC-A, 1 = UPC-E, 2 = JAN13 (EAN), 3 = JAN 8 (EAN),

// 4 = code 39, 5 = ITF, 6 = codabar, 7 = code 128)

const byte barcodeModeUPCA = 0x00;

const byte barcodeModeUPCE = 0x01;

const byte barcodeModeJAN13AEN = 0x02;

const byte barcodeModeJAN8EAN = 0x03;

const byte barcodeModeCODE39 = 0x04;

const byte barcodeModeITF= 0x05;

const byte barcodeModeCODEABAR= 0x06;

const byte barcodeModeCODE128 = 0x07;

int done = 0;

char inData[200];

char inChar= -1;

byte index = 0;

void setup() {

  pinMode(rxPin, INPUT);

  pinMode(txPin, OUTPUT);

  printer.begin(9600);

  Serial.begin(9600); //open the USB connection too

  delay(1000);

  feed();



  //println("Hello, World!");



  //feed();

}

void printOnPrinter(char text[]) {

  printer.print(text);

}

void printlnOnPrinter(char text[]) {

  printer.println(text);

}

void feed() {

  printer.println("");

  printer.println("");

  printer.println("");

}

void cut() {

  printer.print(command, BYTE);

  printer.print(fullcut, BYTE);

}

void partialCut() {

  printer.print(command, BYTE);

  printer.print(partialcut, BYTE);

}

void setBarcodeTextPosition(byte position) {

  if (position < 0) position = 0;

  if (position > 3) position = 3;

  printer.print(commandBarcode, BYTE); // "[1d]H + [48]H + N"

  printer.print(commandBarcodeTextPosition, BYTE);

  printer.print(position, BYTE); // 0 = none, 1 = above, 2 = below, 3 = both

}

void setDoublePrintOn() {

  setDoublePrint(0x01);

}

void setDoublePrintOff() {

  setDoublePrint(0x00);

}

void setDoublePrint(byte mode) {

  printer.print(command, BYTE);

  printer.print(doubleprint, BYTE);

  printer.print(mode, BYTE);

}

void loop() {

  while(Serial.available() > 0) { //only read if there is data available

   if(index < 199) { //one less than size of array

   inChar = Serial.read(); //read in a character

   inData[index] = inChar; //store character in inData

   index++; //increment where to write next character

   inData[index] = '\0'; //null terminate the string

   }

  }

  // while there are bytes to read from the computer, retransmit them

  printOnPrinter(inData);

  delay(1000);

  char inData[200];

  int done = 111;

  Serial.write(done);

}

Beginner Struggling with String Arrays

[2 Replies]
- 15-Dec-2010 08:13 AM
- Forum: Programming Questions
Hi everyone,

I am a total beginner to processing, so please forgive me if this is a really question, but I can just not get it work!

I have a piece of processing code which performs a yahoo search, and saves the result descriptions in a string array. I want to send this information to arduino to then print it out from a receipt printer. As I believe, arduino can't handle strings, but uses char arrays instead, so I am trying to convert my string array into a two dimensional char array to then send to arduino.

Any help you could give me would be fantastic!
2. import pyahoo.*;
3. import com.yahoo.search.WebSearchResults;
4. import processing.serial.*;
5. Serial port;
7. // Create a YahooSearch object. You have to pass in the API key given to you by Yahoo.
8. YahooSearch yahoo;
10. char [][]target;
12. void setup() {
13. size(200,200);
14. port = new Serial(this,Serial.list()[1], 9600);
16. // Make a search object, pass in your key
17. yahoo = new YahooSearch(this, "B5rzyEvV34EjE7c3OWj3BWOXBrP3f.b3HF9hLPGyB0r5CopLwlFLrvhdw8X1.wQnPE3mtihee94-");
18. }
20. void mousePressed() {
21. // Search for a String. By default you will get back 10 results.
22. // If you want more (or less), you can request a specific number by saying:
23. yahoo.search("Patrick", 5);
24. }
26. void draw() {
27. noLoop();
28. }
30. // When the search is complete
31. void searchEvent(YahooSearch yahoo) {
34. String[] summaries = yahoo.getSummaries();
35. char [][]target = new char[summaries.length][];
36. for (int i=0; i<summaries.length; i++) {
37. target[i] = summaries[i].toCharArray();
38. }
39. }

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