Re: Tariffs and zBitx Shipments
#zbitx
I don’t think the exception applies here, but I could be wrong. The price of virtually all ham equipment just took a big jump.?
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Ron, I would like you to review the code: 1.? Here, we setup the ISR (interrupt service routine) to call a function called key_isr whenever the state of the paddle chages (press, release). 2. The key_isr () reads the status of the the two paddles (DASH and PTT) and stores them in global variables ptt_state and dash_state. 3. the cw sending loop has to generate 96,000 samples a second. And it cannot spend?time reading the gpio pins to see if the any new symbol (dot/dash/space) has been generated by the user. Instead, it just reads these two variables. This is done by the routine key_poll(). .4 Read key_poll (). You will note that it executes very quickly. To know what type of key we are using, it doesn't even to a string compare of the CW_INPUT settings, instead it just samples the 6th letter with is different for all the three cases (Straight, Iambic and Iambic-B). Let me know what you think of the?implementation and if it can be improved. - f
On Thu, Apr 3, 2025 at 6:57?AM Ron, N6YWU via <ron.nicholson= [email protected]> wrote: Have you considered using interrupts to handle the GPIO pins connected to the keying inputs?? Interrupts might reduce or eliminate the possibility of missing the first dot before a dash. ?
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A priority interrupt handler would need to be written with good real-time coding practices (bounded time algorithm, no locks, no API calls that could involve memory management, etc.). ? But this should be possible.? Then post the key inputs with time stamps to be handled by the priority keying sidetone process, which perhaps will run only a few milliseconds later.? The time stamps on the interrupt data would prevent the dash from being handled before any dot, if that was the key closure sequence, and solve at least one issue with fast iambic keying that polling with a slow CPU on a loaded system might never be able to completely solve.
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73, Ron, N6YWU
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Re: #zbitx I would really like a formal way to shut down the software gracefully
#zbitx
Agree.? With you being a Linux user.?? I think Farhan mentioned he wanted to avoid giving elevated access to do the shutdown. When at home I ssh into it to issue the shutdown -h now command?
I get a little nervous pulling power on a running Linux computer.? Probably 9 times out of 10, no issues, but the ONE time....well, a corrupt SD card doesn't sound like fun.
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The Raspberry Pi Pico running the display can probably deal with things well, my concern is the other CPU.? I would feel tons better if there ws a formal shutdown item to click on....any thoughts?
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Cheers
Jim K8JK
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#zbitx I would really like a formal way to shut down the software gracefully
#zbitx
I get a little nervous pulling power on a running Linux computer. ?Probably 9 times out of 10, no issues, but the ONE time....well, a corrupt SD card doesn't sound like fun.
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The Raspberry Pi Pico running the display can probably deal with things well, my concern is the other CPU. ?I would feel tons better if there ws a formal shutdown item to click on....any thoughts?
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Cheers
Jim K8JK
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Re: Zbitx power cord connector
I think it is 2.1x5.5
Gerry
On 2025-04-03 01:25, Mike-N4GW via
groups.io wrote:
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Any one know the size of the power connector. ?I want to
order some
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Have you considered using interrupts to handle the GPIO pins connected to the keying inputs? ?Interrupts might reduce or eliminate the possibility of missing the first dot before a dash. ?
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A priority interrupt handler would need to be written with good real-time coding practices (bounded time algorithm, no locks, no API calls that could involve memory management, etc.). ? But this should be possible. ?Then post the key inputs with time stamps to be handled by the priority keying sidetone process, which perhaps will run only a few milliseconds later. ?The time stamps on the interrupt data would prevent the dash from being handled before any dot, if that was the key closure sequence, and solve at least one issue with fast iambic keying that polling with a slow CPU on a loaded system might never be able to completely solve.
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73, Ron, N6YWU
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Zbitx power cord connector
Any one know the size of the power connector. ?I want to order some
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Placed an order
Gerry
On 2025-04-02 17:20, Ed T. via
groups.io wrote:
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I use these to help dissipate the excess heat. Slap them on
back and let them do their job.?
Also use on Xeigu 6200.
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Re: Tariffs and zBitx Shipments
#zbitx
Yeah, but we'll be "great" again, as we pay the increase as buyers.? Sorry for the troubles in this regard.?
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Re: Tariffs and zBitx Shipments
#zbitx
I had been paying a 10% tariff on every part from China.? We did not raise our prices, but we cannot absorb a 54% tariff.? We will have to look at what to do.? ?It will have an effect.
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Re: Tariffs and zBitx Shipments
#zbitx
I was just wondering that myself.? ?Hope it doesn't affect the new sBitx v4 pricing.
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#zbitx Getting started and more cheat sheet
#zbitx
All,
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I have been working on a summary document for my own reference. ?My radio has not shipped yet so I get to read with a little bit of envy!
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I have a hard time digging through all the forum entries so my google doc is born. ?As things settle out I will also add more info to the Wiki here.
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73 KE9A
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Re: Tariffs and zBitx Shipments
#zbitx
Tariffs are kind of a moving target but your radio shouldn't be affected due to the de minimis exception.
Awaiting my new toy, but wondering what, if any, impact the new tariffs announced by the US will have on shipments to the US.?
AC9KQ
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Tariffs and zBitx Shipments
#zbitx
Awaiting my new toy, but wondering what, if any, impact the new tariffs announced by the US will have on shipments to the US.?
AC9KQ
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Re: Video: Timing problems with zBitx internal keyer
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...the radio completely spoils the joy because of too many shortcomings .
I think purchases of HF=signals should be avoided...
I want to enjoy the hobby and not be constantly annoyed by immature
things.
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./.
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Re: Does zBitx have SWR display?
I’ve done both. Showing zBitx 1.06 and sbitx 3.021 as the versions.
73,
Paul, N8HM
On Wed, Apr 2, 2025 at 15:26 David T-- VE3TOS via <digiital= [email protected]> wrote: Factory version of the frontpanel?firmware needs to be updated, and while you are it , do a ./update for the zbitx software as well.?
Mine doesn’t seem to do that. I’ve never seen a power output or SWR there.
73,
Paul, N8HM When you TX, you'll see power and SWR:  This snapshot is from the manual, available here:
On Wed, Apr 2, 2025 at 11:06?AM Nigel Evans M0NDE via <nigel.m0nde= [email protected]> wrote:
Just Curious if the zBitX has any SWR monitoring or display?
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Regards,
Everett-WB9FUW
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David,
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I have no machine running on mine. ?Got the 3B v7 deb package installed. ?I use no machine on most of my computers. ?
Ryan
KK6DZB
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Re: Video: Timing problems with zBitx internal keyer
I am seeing improvement over the code that was shipped, but still issues and my own keying matches that which John posted in his video.
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Re: Zbitx RPI SD-card image needed
I assume that once I flash the image? I will have to open up the zbitx and replacce the sd card with the new one.
Would be nice to be able to boot from the new card via usb and then use the sdcard copy utility to restore to the original card.
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Leo, AI5II
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Re: Waiting for the zBitx to start…
I've done this countless times, all without success.
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Am 02.04.2025 um 21:15 schrieb John AE5X via groups.io <ae5x@...>:
? I had to re-load mine two or three times and it finally started booting up (Tnx HB9CEY).
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James Kvochick
Ted
Robert Fairbairn
Dennis A
Jens/HB9JOI