I suspect I understand...and it's not good.
I think that SPI requires precise timing, and audio interrupts are disabled during long video transfers.
Yet... the audio works fine while the spectrum, the S-meter bargraph, and the waterfall update. Sigh.
- Jerry, KF6VB
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On 2025-02-01 18:50, jerry-KF6VB wrote:
...When tuning.
The tuning of the T41 ( V12, I2C front panel, I2C encoders ) is
unpleasant. As you tune around, you get tiny
blips of sound, interspersed with long display updates. You basically
cannot hear what you're tuning past.
I just tried commenting out the bit of code that displays the
frequency as you tune. Tuning is much better.
There is still a burst of nasty noise with each encoder *tick*, but
it's short, and you can easily hear what you're
tuning past.
Naturally, that's not a real fix. The instant you start tuning, the
frequency display is wrong...and that's just wrong!
What would be a fix? A few things: First of all, we *could* do a
timer thing where we don't bother to display
the frequency until we stop tuning. There was tuning, and now there
isn't? Ok, display where we got to. Still not optimal.
I note that it always updates ALL the digits of the frequency, even
those that haven't changed. It even
redisplays the VFO B frequency. Surely it doesn't need to update all that.
Also - I wonder why on earth the audio pauses or stops or gets
discarded while it writes the display? Surely
audio interrupts can continue during this time....?
- Jerry, KF6VB
