Infrared Wireless Data Transfer

Projects Programming
1

Hello,
I have recently been working with sending data from one Arduino Duemilanove to another using infrared transmission. I have the system transferring data but for some reason, the data is getting all hashed up. Here is the code:
Transmitter code

//generates 38kHz carrier wave on pin 9 and 10
//sends data via TX every 500ms
void setup()
{
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);

  // Clear Timer on Compare Match (CTC) Mode
  bitWrite(TCCR1A, WGM10, 0);
  bitWrite(TCCR1A, WGM11, 0);
  bitWrite(TCCR1B, WGM12, 1);
  bitWrite(TCCR1B, WGM13, 0);

  // Toggle OC1A and OC1B on Compare Match.
  bitWrite(TCCR1A, COM1A0, 1);
  bitWrite(TCCR1A, COM1A1, 0);
  bitWrite(TCCR1A, COM1B0, 1);
  bitWrite(TCCR1A, COM1B1, 0);

  // No prescaling
  bitWrite(TCCR1B, CS10, 1);
  bitWrite(TCCR1B, CS11, 0);
  bitWrite(TCCR1B, CS12, 0);

  OCR1A = 210;
  OCR1B = 210;

  Serial.begin(2400);
}

void loop()
{
  Serial.println("testing");
  delay(500);
}

Receiver code:

void setup()
{
  Serial.begin(2400);
  pinMode(13, OUTPUT);
}

void loop()
{
  // if incoming serial
  if (Serial.available()) {
    readSerial();
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }
  delay(10);
}

void readSerial() {
  char val = Serial.read();
  Serial.print(val);
}

The code is open-source and was not written by me. It appears to function well. I'm not sure if the hashed data is due to hardware problems or code problems. Any help would be great.

2

How does that code, which uses the HardwareSerial class, and the hardware serial pins, relate to your problem?

3

The code for the transmitter basically broadcasts a 38 kHz signal from pins 9 and 10. I'm very new to C and this code honestly flies over my head. That's why I'd like to have someone who knows check it.

4

Having just seen your companion posting about the hardware I'm suspicious of the receive side electronics - is the IR receiver demodulating the 38kHz signal - if not then connecting it to the RX pin will not produce clean 2400 baud signalling as the 38kHz waveform will be superimposed - this could easily explain mis-reading of the serial input.