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Showing posts from May, 2019

Improvements to use the FT8 protocol on the Cortex-M base

Improvements to use the FT8 protocol on the Cortex-M base Several experiments are underway to use FT8 on the Cortex-M base. The previous experiment can be seen in the link below.
http://www.hamskey.com/2019/05/ft8-wsjt-x-20-protocol-decoding-in.html

Release EU1KY AA Firmware CEC Version 0.71 ( V1.0 Candidate)

Release EU1KY AA Firmware CEC Version 0.71 ( V1.0 Candidate)Changed from Version 0.70 to Version 0.71
At the request of the testers, the tuneSWR source code was restored to Version 0.53 code. All functions are the same as V0.70. Only tuneSWR has changed.
This version is a development version and may be unstable, and some of the features included in this version may be removed from V1.0, Stabilized version V0.53 has been released, and stabilized version is posted separately.

stabilized version : http://www.hamskey.com/2019/03/eu1ky-antenna-analyzer-cec-stabilized.html

FT8 (Wsjt-x 2.0) protocol decoding in Cortex-M for experiment

FT8 (Wsjt-x 2.0) protocol decoding in Cortex-M for experimentI implemented FT8 signal decoding on the STM32F746G-Disc board for Expermental.
I want to test whether Cortex-M based FT8 communication is possible. I used Wsjt-x 2.0 and some source code to enable FT8 decoding on the Cortex-M7 base.

How to use Voice Keyer in EU1KY with CEC Firmware V0.7

How to use Voice Keyer in EU1KY with CEC Firmware V0.7

Version 0.7 is being prepared for deployment.
Voice Keyer (or Voice Recorder) function was added in Version 0.7.

If you only want to use it as a voice recorder, you do not need any modifications, Just need update the firmware.

If you want to use it as a Voice Keyer, you need a very simple modification.


1.Modifications for use as a voice keyer
1.1 PTT Control

Below is just one example.
Only the part with PC817 is shown below.




1.2 MIC Input
It uses a push switch to switch between microphone and AA.
It is recommended to pass a small transformer between the transceiver and the AA.


 Please use only one (Left or Right) because the speaker jack of AA is stereo.
Recording and playback will operate in stereo. You can use either the left or the right one for you.


2.How to use Voice Keyer

2.1 Use Voice recorder
Touch the 'Voice Keyer'
The 'USB Host' menu has been moved to the Configuration section.


The screen below is the Voice …

EU1KY AA Firmware stabilization version update (V0.53) and Test about Extended WSPR Band (4m, 2m, 630m, 2190m)

EU1KY AA Firmware stabilization version update (V0.53) and Test about Extended WSPR Band (4m, 2m, 630m, 2390m)
Since Version 0.53 did not cause major problems, I moved 0.53 to the stable version.
My next task is to free memory to add other features. Maybe it will be version 0.6 and it will not be released.
I will release the source to github after a few days of preparation after Version 0.7 is released.

Release EU1KY AA Firmware CEC Version 0.53

Release EU1KY AA Firmware CEC Version 0.53  This version is a development version and may be unstable, and some of the features included in this version may be removed from V1.0, Stabilized version V0.40 has been released, and stabilized version is posted separately.
stabilized version : http://www.hamskey.com/2019/03/eu1ky-antenna-analyzer-cec-stabilized.html

How to use Audio DSP on Antenna Analyzer (Features included after CEC V0.5)

How to use Audio DSP on Antenna Analyzer (Features included after CEC V0.5)
Audio DSP is a function that filters the sound coming from the transceiver into a desired range.

You do not need any hardware changes to use this feature. Just prepare your headphones. If you want to make a little bit better, you can add a very small $ 1 speaker to your board.

I am preparing to distribute the test firmware (V0.52). Please wait 1 ~ 2 days.