Elecraft T1 Arduino Interface to integrate with DDUtil and the FlexRadio 1500

ElecraftT1.ino

/******************************************************
*  Elecraft T1 Interface                              *
*                                                     *
*  This Arduino sketch allows DDUtil to control       *
*  an Elecraft T1 ATU via the T1's remote control     *
*  interface.                                         *
*                                                     *
*  Copyright (c) Matthew Robinson - VK6MR, 2011       *
*                                                     * 
*  This code is released under a Creative Commons     *
*  Attribution-NonCommercial-ShareAlike 3.0           *
*  Unported (CC BY-NC-SA 3.0) license.                *
*                                                     *
*  http://creativecommons.org/licenses/by-nc-sa/3.0/  *
*                                                     *
******************************************************/


int TUNE = 2;
int DATA = 3;

int prevBand = -1;
int band = 0;

char buffer[64];
int  bufptr = 0;

void setup() {
  Serial.begin(9600);

  pinMode(TUNE, OUTPUT);
  digitalWrite(TUNE, LOW); 

  pinMode(DATA, INPUT);
}

void loop() {
  if (Serial.available()) {
    char character = Serial.read();

    if (character != '\n' && character != '\r') {

      buffer[bufptr] = character;
      if (buffer[bufptr] == ';') {

        // Message should always be 14 chars
        if (bufptr == 13) {
          parseBuffer();

          if (band != -1) {   
            if (band != prevBand) {
              sendBand();
              prevBand = band;
            }
          }
        }

        bufptr = 0;
      } 
      else {
        bufptr++;

        // Don't overrun the buffer, messages should only be 14 chars anyway
        if (bufptr > 60)
          bufptr = 0; 
      }   
    }
  }  
}

// buffer is of form:
// IF00003700000;
// IF00051000000;

void parseBuffer() {
  if (buffer[0] != 'I' || buffer[1] != 'F') {
    band = -1;
    return;
  }

  // We are only interested in the significant figures
  int freq = buffer[6] - 48;
  freq += (buffer[5] - 48) * 10;  

  band = 0;

  if (freq >= 1 && freq <= 2) {
    band = 1; // 160
  } 
  else if (freq >= 3 && freq <= 4) {
    band = 2; // 80
  } 
  else if (freq == 5) {
    band = 3; // 60
  } 
  else if (freq == 7) {
    band = 4; // 40
  } 
  else if (freq == 10) {
    band = 5; // 30
  } 
  else if (freq == 14) {
    band = 6; // 20
  } 
  else if (freq == 18) {
    band = 7; // 17
  } 
  else if (freq == 21) {
    band = 8; // 15
  } 
  else if (freq == 24) {
    band = 9; // 12
  } 
  else if (freq >= 28 && freq <= 29) {
    band = 10; // 10
  } 
  else if (freq >= 50 && freq <= 54) {
    band = 11; // 6
  }
}

void sendBand() {

  // Pull the TUNE line high for half a second

  digitalWrite(TUNE, HIGH);
  delay(500);
  digitalWrite(TUNE, LOW); 

  // The ATU will pull the DATA line HIGH for 50ms
  while(digitalRead(DATA) == LOW) {
  }
  while(digitalRead(DATA) == HIGH) {
  }
  

  // Wait 10ms
  delay(10);

  // and then send data on the DATA line
  pinMode(DATA, OUTPUT);

  // 1 bits are HIGH for 4ms 
  // 0 bits are HIGH for 1.5ms
  // Gap between digits is 1.5ms LOW

  // 1st bit
  sendBit(band & 8);
  sendBit(band & 4);
  sendBit(band & 2);
  sendBit(band & 1);
  
  // Leave the line LOW
  digitalWrite(DATA, LOW);

  // and switch it back to an input
  pinMode(DATA, INPUT);
}

void sendBit(int bit) {
  
  digitalWrite(DATA, HIGH);
  if (bit != 0) {
    delay(4);
  } else {
    delayMicroseconds(1500);
  }
  
  digitalWrite(DATA, LOW);
  delayMicroseconds(1500);
}

Hi

I made the arduino + smal board for connection to the T1.
Sketch compiled and uploaded well.
Try tot connect to powersdr with DDutil and vspMger.
But it is not working.
Perhaps I do something wrong in my setup.
Can you tell me exact how you did setup Powersdr (2.5.3) Vpsmgr and DDutil (v3)

Thanks in advance for answering

Regards
Onno
pa0ono

(nano