SCRadioSoftwareK4KRW

This software is for a Software Controlled Radio of the type introduced in the March 2016 QST magazine in an article titled:

A Modular 40 Meter CW Transceiver with VFO

The original project was the work of:

• Dr. Jack Purdum - W8TEE
• Farukh Zia - k2ZIA
• Dennis Kidder - W6DQ

The radio is a modified 49er QRP rig. It is controlled by an Arduino Nano.
The main oscillator is an AD9850 DDS.

There is a yahoo group named SoftwareControlledHamRadio where project enthusiasts share their knowledge.

SCRadioSoftwareK4KRW was an effort to utilize my programming background in a project that was solely for the fun of it. The initial release was the result of almost two months of work. However, it was two months of 'when I could find time' work. But, it did include at least three solid weekends of work. So it was a significant amount of effort. In the end I ended up with software that I wrote that could control a radio I assembled. Of course, the real thanks goes to Jack, Farukh and Dennis who got this whole thing started. Enthusiasts in the Yahoo group have also been fantastic.

This software adds the following functionality to the rig.

• A menu system for controlling rig settings
• A rit on/off menu option
• A menu option for reversing the receive offset direction
• A backlight on/off option
• A rit offset adjustment.
• Multispeed tuning knob
• A CW Keyer that supports
  • Straight Key
  • Iambic Mode B
  • Iambic Mode A
  • Keyer Speed Adjustment
  • Reversed paddles
  • Settings are persisted in EEPROM for later reuse
• Startup check for a shorted key

The software makes the following assumptions:

• The microprocessor is an Arduino Nano with an AtMega 328 processor.
• The display is two lines of 16 charaters. It may be that larger will work.
• Your rig has the Receive Offset hardware modifications
• To use the built in keyer you need to add a second key line into the Arduino I used pin 6 on the Arduino for this.

Feedback

If you find a bug or if you would like a specific feature, please report it at:

https://github.com/rydodd/SCRadioSoftwareK4KRW/issues

Credits

• The original software was created by Jack Purdum - W8TEE and Dennis Kidder - W6DQ
• The original logic for controlling the DDS was written by Richard Visokey - AD7C
• The original CW keyer logic was written by Steven T. Elliott - K1EL and later modified by Glen Popiel - KW5GP I further modified it to restore some removed functionality
• Thanks to Igor Mikolic-Torreira for his arduino-EventManager project which allowed me to persue an event driven approach to the application.

License

This software is free software; you can redistribute it and/or modify it under the terms of the MIT License.

This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the MIT license for more details.

A copy of the license is included in the SCRadioSoftwareK4KRW package.

Copyright

Copyright (c) 2016 Richard Young Dodd