nice it's good to see progress on this, it might be very useful when finished..

oh? when do you have to get it ready? that's a nice schoolproject.. what kind of studies are you doing?

I, and many others, including you Keoni, have been wanting to interface the calculators serial with an Arduino. I've coded only sparsely in my life, just enough to get by. I use lots of example code to write programs, they're my crutch. So basically what I have right now is a Arduino program that sends a byte repeatedly through the link port using Kerm Martian's whitepaper on the Calcnet protocol to fix my timings. But the calc still receives nothing. I am using two programs on the calc to receive a byte. The built in GET command and my Omnicalc linkreceive() command. Neither of these get anything from my program on the Arduino. Here is my code:

Code: [Select]

#include <SPI.h>

int Data = 6; //Data or TIP or RED
int Clock = 7; //Clock or RING or WHITE
byte DRead = 0;
byte DataByte = 0;

void setup()
{
  Serial.begin(9600);
  delay(1000);
  Serial.println("Awesome Sauce! :)");
}

void loop()
{
  sendByte(127);
}

int sendByte(byte DataByte)
{
  //initialize the contact with the mothership

  pinMode(Data, OUTPUT);
  pinMode(Clock, OUTPUT);
  digitalWrite(Data, HIGH);
  digitalWrite(Clock, HIGH);
  delayMicroseconds(1000);
  digitalWrite(Clock, LOW);
  delayMicroseconds(9000);
  digitalWrite(Data, HIGH);
  digitalWrite(Clock, HIGH);
  delayMicroseconds(52);
  delayMicroseconds(110);
  digitalWrite(Data, LOW);
  digitalWrite(Clock, LOW);
  delayMicroseconds(52);
  digitalWrite(Data, HIGH);
  digitalWrite(Clock, HIGH);
  delayMicroseconds(42);

  //send data now
  int BitIncrement;
  for(BitIncrement<=7; BitIncrement++;)
  {
  int SendBit;
  bitRead(DataByte, BitIncrement);
  digitalWrite(Data, SendBit);
  delayMicroseconds(17);
  digitalWrite(Clock, LOW);
  delayMicroseconds(35);
  digitalWrite(Data, HIGH);
  digitalWrite(Clock, HIGH);
  delayMicroseconds(52); 
  }
}

int recieveByte(void)
{
  //initialize contact with the daughtership
 
  pinMode(Data, INPUT);
  pinMode(Clock, INPUT);
  DRead = digitalRead(Data);
  return DRead;
}