I was looking at this with Bill yesterday. That message should happen only
if there is no response from the I2c message to the temp chip. Since it
works just fine on mine, I'm guessing there is a hardware issue on Bill's
board. He checked all the pins, so that implies to me either the chip is
bad, or there is some issue with the board or the header connecting it to
the LaunchPad. Or possibly a pullup on one of the I2c lines. I don't
recall if there is a physical pullup or if they are programmed in the
TMS570.
73,
Burns Fisher, WB1FJ
*AMSAT(R) Engineering -- Flight Software*
On Sat, Aug 5, 2023 at 10:00 AM Bill Reed via pacsat-dev <
pacsat-dev(a)amsat.org> wrote:
> I upgraded my pacsat test hardware to software version 0.1d. It didn't
> run. I discovered that the software was hanging up when it tried to
> initialize the i2c temp sensor. That is new in 0.1d. In
> troubleshooting with Chris and Burns we discovered that the calls to the
> i2c initialization code were misplaced. That was fixed and uploaded to
> github as version 0.1e.
>
> Version 0.1e runs on my test hardware but gives an i2c error message
> every time it attempts to read the temp. This could be a hardware fault
> on my test hardware. I have checked the temp sensor and all pins seem
> to be correctly connected and connectivity of the SDL and SCA lines with
> the TMS570 board is OK. I will be connecting the temp sensor to a
> raspberry pi and running tests on that component.
>
> In order to continue to use the test hardware I have commented out
> line191 in TelemAndControlTask.c which simply reports an error by
> calling debug_print(). Entering 'get temp' on the pacsat console still
> shows the error message.
>
> I'm having too much fun!!
>
> Bill
>
>
> -----------------------------------------------------------
>
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> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org
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>
I upgraded my pacsat test hardware to software version 0.1d. It didn't
run. I discovered that the software was hanging up when it tried to
initialize the i2c temp sensor. That is new in 0.1d. In
troubleshooting with Chris and Burns we discovered that the calls to the
i2c initialization code were misplaced. That was fixed and uploaded to
github as version 0.1e.
Version 0.1e runs on my test hardware but gives an i2c error message
every time it attempts to read the temp. This could be a hardware fault
on my test hardware. I have checked the temp sensor and all pins seem
to be correctly connected and connectivity of the SDL and SCA lines with
the TMS570 board is OK. I will be connecting the temp sensor to a
raspberry pi and running tests on that component.
In order to continue to use the test hardware I have commented out
line191 in TelemAndControlTask.c which simply reports an error by
calling debug_print(). Entering 'get temp' on the pacsat console still
shows the error message.
I'm having too much fun!!
Bill
The OnSemi AX5043 power study I mentioned last week can be found at:
https://www.onsemi.cn/pub/collateral/and9314-d.pdf
I've verified with duplicating their input numbers as best as possible and
see similar results.
As well, I performed a series of test using different criteria and again
verified that the power output of the AX5043 is not a linear line but one
that tapers off as the power is decreased.
Therefore the formula given in the programming manual and duplicated by
several developments is incorrect in setting power based on a percentage.
In our use it is irrelative as we will be measuring the power output of the
power amplifier and setting the AX5043 output as needed to drive the PA.
However, it is good to know these things.
As for harmonics; at 435.3 mhz with no output filtering the second harmonic
is down by 34 db and the third by 44 db.
With adequate output filtering on the power amplifier there should be no
issues.
Pacsat dev mtg 8/3/2023
Thu, Aug 3, 2023 7:00 PM - 9:00 PM (CDT)
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What are the symptoms? Does it fail to compile?
73
Chris
On Thu, Aug 3, 2023, 10:41 Bill Reed via pacsat-dev <pacsat-dev(a)amsat.org>
wrote:
> Haven't been able to get Pacsat ver 0.1d working. 0.1c worked fine.
> Still trying to resolve this.
>
> Anyone else have 0.1d working?
>
> Bill
>
>
> -----------------------------------------------------------
>
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>
I've merged my code brach into main, updated the version to 0.1d and pushed
main back to github. This version supports the telemetry that I have
prototyped.
If you want to receive the telemetry you also need version 0.45b of the
groundstation from here:
https://www.g0kla.com/pacsat/index.php
73
Chris
--
Chris E. Thompson
chrisethompson(a)gmail.com
g0kla(a)arrl.net
I may or may not make it tonight. I don't have much to report, though.
-corey
On Thu, Jul 27, 2023 at 06:48:40PM +0000, Bill via pacsat-dev wrote:
> Pacsat dev mtg 7/27/2023
>
> Let's discuss what we might present at the amsat annual meeting.
>
> Thu, Jul 27, 2023 7:00 PM - 9:00 PM (CDT)
>
> Please join my meeting from your computer, tablet or smartphone.
>
> https://meet.goto.com/835171821
>
> You can also dial in using your phone.
> (For supported devices, tap a one-touch number below to join instantly.)
>
> United States: +1 (408) 650-3123
> - One-touch: tel:+14086503123,,835171821#
>
> Access Code: 835-171-821
>
> Join from a video-conferencing room or system.
> Dial in or type: 67.217.95.2 or inroomlink.goto.com
> Meeting ID: 835 171 821
> Or dial directly: 835171821(a)67.217.95.2 or 67.217.95.2##835171821
>
>
> Get the app now and be ready when your first meeting starts:
> https://meet.goto.com/install
>
>
>
> -----------------------------------------------------------
>
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Apologies, but I will likely not make it back from dinner with friends in
time tonight.
73,
Burns Fisher, WB1FJ
*AMSAT(R) Engineering -- Flight Software*
On Thu, Jul 27, 2023 at 2:48 PM Bill via pacsat-dev <pacsat-dev(a)amsat.org>
wrote:
> Pacsat dev mtg 7/27/2023
>
> Let's discuss what we might present at the amsat annual meeting.
>
> Thu, Jul 27, 2023 7:00 PM - 9:00 PM (CDT)
>
> Please join my meeting from your computer, tablet or smartphone.
>
> https://meet.goto.com/835171821
>
> You can also dial in using your phone.
> (For supported devices, tap a one-touch number below to join instantly.)
>
> United States: +1 (408) 650-3123
> - One-touch: tel:+14086503123,,835171821#
>
> Access Code: 835-171-821
>
> Join from a video-conferencing room or system.
> Dial in or type: 67.217.95.2 or inroomlink.goto.com
> Meeting ID: 835 171 821
> Or dial directly: 835171821(a)67.217.95.2 or 67.217.95.2##835171821
>
>
> Get the app now and be ready when your first meeting starts:
> https://meet.goto.com/install
>
>
>
> -----------------------------------------------------------
>
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>
Pacsat dev mtg 7/27/2023
Let's discuss what we might present at the amsat annual meeting.
Thu, Jul 27, 2023 7:00 PM - 9:00 PM (CDT)
Please join my meeting from your computer, tablet or smartphone.
https://meet.goto.com/835171821
You can also dial in using your phone.
(For supported devices, tap a one-touch number below to join instantly.)
United States: +1 (408) 650-3123
- One-touch: tel:+14086503123,,835171821#
Access Code: 835-171-821
Join from a video-conferencing room or system.
Dial in or type: 67.217.95.2 or inroomlink.goto.com
Meeting ID: 835 171 821
Or dial directly: 835171821(a)67.217.95.2 or 67.217.95.2##835171821
Get the app now and be ready when your first meeting starts:
https://meet.goto.com/install
