, are used.
Regards,
Steve
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I may have to download Elsie then and grab a pencil to make some coils...
:-)
http://www.tonnesoftware.com/elsie.html
On Sun, Aug 9, 2020 at 6:02 PM Adrian Musceac wrote:
> The Pluto receiver is useless without proper filters as it will receive
> everything at the same time. With filters, it
On Sun, Aug 9, 2020 at 5:51 PM David Rowe wrote:
>
> I wonder if that was a configuration thing Steve, at max analog gain the
> noise figure of the Pluto (AD9363) is specified at just 2.5dB - better
> than many other SDRs and hardware-defined Ham radios.
>
> Gain is pretty c
When the Pluto came out, I had to have one. Playing with it kind of
left me saying "meh" because it didn't seem to have much RX gain. I
needed a beam to focus on the transmitter.
I then tried the LimeSDR-Mini but that thing only lasted about a year
and then failed. Expensive junk. Comparably, the
On Fri, Jul 24, 2020 at 8:33 AM Sebastien F4GRX wrote:
>
> The problem with the need for power is that imho codec2 has become too heavy
> to run on simple platforms.
I think the fast FP technology is standard now on $5 USD CPU's (simple
platforms). Most of the integer only designs are for use
On Wed, Jul 22, 2020 at 7:28 AM Tomas Härdin wrote:
>
> So anyone wanting to develop or modify the SM3000 would need to install
> two pieces of proprietary software with considerable strings attached?
Does the Altium have a KiCad export mode?
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resolder, then it
sounds better (probably just an user preference, not a build issue).
Steve
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for developing
projects, but updates are nice to read which point you to your
development blog or groups reflector.
https://groups.io
Just some thoughts...
Steve
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Is this going to be a KiCAD project?
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buttons and morse code
obnoxious (especially since they go on and on...).
https://github.com/BritishAmateurTelevisionClub/portsdown-buster#installation-for-batc-portsdown-transmitter-buster-version
Steve
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Best procedure is go to:
https://github.com/drowe67/codec2/issues
and open a new issue. Explain it with examples or line numbers, or
substitute code.
thanks!
On Thu, Jul 16, 2020 at 6:25 AM glen english wrote:
> Hi Steve
>
> yep
>
> It didnt take long to find, a few minute
I think the theory is, you send a BPSK value (in this case 0:0 or BPSK
1.0 + 0.0j
Then on receive it should be the same value, or it is out of sync, or it is
garbled by the ether.
The value is not really important, just that it be the same BPSK value,
which the decodes to two indexes of the bits
The stuff on sourceforge is an archive. GIT is the new development area.
Steve
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> Moving forward to a Digital Future with C4FM..
Hmmm... digital future at 12.5 kHz on 80 metres. No comment, er, well,
suppressed comment, hee
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Alan, you've been banging on that code for a couple of years now. I'm
wondering if maybe there's a better way. Since simplex repeaters are
not real time, this opens up the possibility of just vocoding the
audio and sending the resulting data file as an encoded/fec packet.
For example via Pactor.
On Sun, Jun 21, 2020 at 5:37 PM Al Beard wrote:
>
> Have you seen the Ham Radio Mesh network:
It looks like interest is waning as a lot of those nodes haven't been
updated for 5 years. I know the ones around me are all dead.
It's kind of expensive for the range. Many of the nodes depended on
Hee,
There's also nMigen
https://www.youtube.com/watch?v=85ZCTuekjGA
Although the guy never finishes anything :-) The ride was interesting.
On Sun, Jun 21, 2020 at 11:15 PM glen english wrote:
> Hi Steve
>
> oh yeah. Undergrad thesis. good for students to have a rea
FYI
Codec2 (2400 I think) Encoder in FPGA
Thesis:
https://etd.ohiolink.edu/!etd.send_file?accession=miami158819886466373=inline
Github: https://github.com/santhiyaskumar/FPGA_Codec2Encoder
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A couple years ago I experimented with the Coherent FDM modem using Newman
Phases instead of the spacing scheme of the original. It turned out there
was no advantage. The increasing linear spaced carriers reduced the
crest-factor the same as Newman Phases.
For the 700D we of course use an IDFT
You might try changing it to:
g_sfPlayFile = sf_open((const char *)wxGetApp().m_txtVoiceKeyerWaveFile,
SFM_READ, );
The sf_open() call expects a constant, but m_txtVoiceKeyerWaveFile is
obviously a variable from config. Don't know why SuSE is being so pissy. Is
this an Itanium chip?
FYI
Steve
to need
more power, which is cheap at class-C.
Steve
On Sun, Apr 12, 2020 at 3:14 PM David Rowe wrote:
> Hi Steve and Jeroen,
>
> I was wondering why you wanted to use a scrambler?
>
> I understand the main reason is making the synchronisation algorithms
> work better. For ex
One final note, if you want to see the algorithm in a form that can be used
across a frame of data:
https://github.com/srsampson/mFSK/blob/master/crc-scrambler-interleaver-test.c#L85
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oops, I keep typing Symbols instead of Samples
/* Slow Data + Voice Bits + Sync Bits = 747 Bits = 5976 Samples */
/* Full Data + Sync Bits = 747 Bits = 5976 Samples */
Without the bit-stuffing the spectrum cleaned up and it actually sounds
more random, but this is just a function of your test
+8+720)
On Sat, Apr 11, 2020 at 1:15 PM Steve wrote:
> Yes, I closed it because it was probably incomplete, so left it there for
> reference.
>
> https://github.com/JeroenVreeken/codec2/pull/1
>
>
>
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Yes, I closed it because it was probably incomplete, so left it there for
reference.
https://github.com/JeroenVreeken/codec2/pull/1
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with a scrambler, but I haven't found all the places
to remove the bit-stuffing :-)
On Tue, Apr 7, 2020 at 4:08 PM David Rowe wrote:
> Hi Steve,
>
> From what I understand (please feel free to correct me Jeroen) this is a
> baseband PAM waveform over analog FM. I'm haven't seen any
What would be expected here? Say about 9.5 dB Eb/N0 at 10E-5? I think
that's what the G3RUH modem got.
It will definitely fill up the channel! :-)
On Tue, Apr 7, 2020 at 2:43 AM David Rowe wrote:
> Steve and Jeroen - it would be interesting to measure the modem BER (or
> Packet Erro
Hmmm, not as purely scrambled with the sync bits left unscrambled.
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:-) Just an idea...
https://github.com/srsampson/codec2/tree/ss-scramble
Steve
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the unscrambled spectrum:
[image: unscrambled.png]
...and scrambled:
[image: scrambled.png]
...and here's what it sounds like:
https://github.com/srsampson/codec2/blob/ss-scramble/wav/scrambled.wav
Just an idea!
Steve
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A few notes: the CLIP/ERR LED is completely software. They only
connect to the CPU.
It's a CLIP indicator during transmit, and an ERR indicator during receive.
I think the code probably needs more. Currently the RX LED code in
sm1000.main is:
led_rt(freedv_get_sync(f));
. Sigh... It doesn't have to be 100% compatible at
this point, but it does have to sound good!
I'm interested in the 4FSK modem. These Teensy's are so cheap, you
could have one dedicated to the modem, and one to the vocoder.
On Fri, Feb 28, 2020 at 1:42 PM Al Beard wrote:
>
> Hi Steve a
> ...adding the static keyword
> on to functions that are only called from within a single file.
That is my own coding style. In early MS-DOS days, this saved time and
memory during linking, Smaller symbol tables, etc...
Plus, if you list all the static functions at the top of the file as
Only one error found in abandoned code. Make the .h file an extern and add
the definition to the C file.
$ diff ~/github/codec2/stm32/inc/si53xx.h si53xx.h
287c287
< T_Si5351_data Si5351_Config;
---
> extern T_Si5351_data Si5351_Config;
$ diff ~/github/codec2/stm32/src/si53xx.c si53xx.c
can be archived and removed from
the main playing field.
On Sun, Feb 16, 2020 at 11:53 AM Steve wrote:
> I added it to the CMakeLists.txt file:
>
> # Set default C flags.
> set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-strict-overflow
> -fno-common")
>
> Comp
I added it to the CMakeLists.txt file:
# Set default C flags.
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-strict-overflow -fno-common")
Compiled without errors or warnings on GCC 7.4.0
No change.
On Sun, Feb 16, 2020 at 10:48 AM Albert Cahalan wrote:
> > Maybe just add -fcommon to the
Maybe just add -fcommon to the Makefile
On Sun, Feb 16, 2020 at 7:41 AM Richard Shaw wrote:
>
> Guys,
>
> As usual new releases of GCC are more pedantic about being compliant to the
> standards that previous releases. With GCC 10 codec2 no longer compile due to
> multiple definitions of
700C
codec running on it. I'm playing with a streaming/thread split buffer
design, rather than block mode.
Just use the standard codec on the HamVOIP Pi, whatever it is.
Hopefully it uses some compression.
On Sat, Feb 15, 2020 at 2:10 PM Al Beard wrote:
>
> Hi Steve and all,
>
> Loo
I snagged a Teensy 4.0 development board and was messing around, and
noticed there was a newer gcc-arm-none-eabi from 2019.
https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads
In the stm32 README it uses Keil so the change would be:
for the codebook.
Steve
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On Sat, Nov 2, 2019 at 5:00 PM Sam Shoja wrote:
>
> I am wondering which MCU from STM32F family is being used in SM1000.
>
STM32F405VGT6 168 MHz Floating Point
ober 23, 2019 4:20:48 PM UTC, Steve wrote:
>>
>> On Wed, Oct 23, 2019 at 10:44 AM Adrian Musceac wrote:
>>>
>>>
>>> Regarding mode 2400A, can someone confirm that the output of this mode is
>>> resampled to 48 kHz?
>>> I'm trying to
On Wed, Oct 23, 2019 at 10:44 AM Adrian Musceac wrote:
>
> Regarding mode 2400A, can someone confirm that the output of this mode is
> resampled to 48 kHz?
> I'm trying to add it, but some numbers don't work for me.
It's not resampled, it is generated at 48 kHz rather than 8 kHz as in
other
To answer your SDL Library problems:
https://stackoverflow.com/questions/8102313/installing-sdl-on-fedora/8102343
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On Mon, Aug 19, 2019 at 4:19 AM Al Beard wrote:
>
> ./src/freedv_tx 700D blank.c2 blank8.raw --codectx<- output is zero
> bytes, not good!!
>
> Not good. What have I done wrong?
I don't think freedv_tx is designed to work with .c2 files.
This works:
./freedv_tx 700D
Looks like a bug snuck in with freedv_api.c
https://github.com/drowe67/codec2/blob/master/src/freedv_api.c#L288
In order to save space on the SM1000 the f->mod_out isn't allocated.
possible solution:
#ifdef __EMBEDDED__
/* only allocate this array for interleaver sizes > 1 to save
Here how to do a diff:
svn diff -r 4010:4121 >diff.txt
Then look through the diff.txt to locate software changes over the years.
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QO-100 satellite.
Steve
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On Fri, Aug 9, 2019 at 10:39 PM Mark Jessop wrote:
>
> Is there anyone out there who has been able to successfully build the latest
> git freedv / codec2 master branches under OSX?
would:
-D_POSIX_C_SOURCE=200112L
(or whatever level) in the clang compile command work?
I believe that is
oops, I mean "sudo nice -n -20"
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> When I stop the Rx signal CPU load goes to 100% and it hangs.
Maybe try "sudo nice -20" as a command prefix??
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On Wed, Jul 31, 2019 at 9:53 AM Ammar Ahmad Khan wrote:
>
> I have only done bachelors Steve... Don't use such difficult terminologies...
> bada-bing
It's Sicilian talk, Not taught in schools... :-)
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On Wed, Jul 31, 2019 at 6:27 PM glen english wrote:
>
> Suggest new designs use the cortex M7, 1.8 x as fast as the M4 for same
> clock on codec2
>
New STM32H7 has dual core (-M7 and -M4) and also double precision
float for -M7 core. Lots of memory.
Starting in 4th Quarter.
On Wed, Jul 31, 2019 at 5:49 PM Stuart Longland
wrote:
>
> The A/D and D/A are built into the STM32F407.
Good point, I guess I mean't the stuff in the "Rig Interface" section.
Transformers, optoisolator, op amps, etc.
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How about a new repository for a KiCAD project to copy the SM1000
support circuitry, e.g., A/D, D/A, PTT, LED's, etc, onto a RPi4 HAT.
Maybe include a +12 VDC connector to power everything.
The circuits are tested already, so bada-bing...
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My next phone is going to use the Space-X Starlink satellite cluster
and TCP/IP on the new 44-Net :-)
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You might start here:
http://www.rowetel.com/?page_id=2458
Lots of bad things in the ionosphere, which FDM tries to work through.
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> ...And can this system run on GSM ?
This system is incompatible with GSM. Look through the IEEE stuff for
modems that were tried the last 10 years.
Example: https://ieeexplore.ieee.org/document/7391285
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One of the neatest things I found last year, was the ZeroTier network.
https://www.zerotier.com/
A group of us had ADS-B receivers and wanted to network them together.
ZeroTier allowed us to create a private LAN that ends-up being just a
routable device/address on our computer. I think this
> ...the B.O.D. are all reaching...
oy vey, that may be too harsh... That is, to say, the B.O.D. reside
along the "San Andreas Fault".
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FYI, I write this news in support of the decision, as it creates long term
wealth for investment. My hope is that very little will be used for lawyers
and accountants.
https://www.ampr.org/amprnet/
The seller was: Brian Kantor, Phil Karn, K. C. Claffy, John Gilmore, who
make up the B.O.D. of the
Can you send me the file also?
I will compare it to the one I just generated with hex2dfu.py.
Thanks!
On Tue, Jul 16, 2019 at 4:02 PM wrote:
> He just didn’t have the file, and I sent it to him.
>
>
>
> He is now all upgraded just fine.
>
>
>
> Walter/K5WH
>
:
>
> Thank Steve,
>
> Could you please add that as a Pull Request for the sm1000 manual?
>
> https://github.com/drowe67/codec2/blob/master/stm32/doc/sm1000_manual.md
>
> Walter's method is already in there, but it would be useful to have
> your's as well.
>
> I had
What directory does the .dfu file get created in?
I think George is having trouble finding it.
On Tue, Jul 16, 2019 at 3:29 PM wrote:
> Steve,
>
>
>
> The .dfu file is the one we use to apply the firmware update via a Windows
> environment, versus a Linux environment.
&
Where is it asking you about a .dfu file?
There is no .dfu file.
Just use the binary file.
On Tue, Jul 16, 2019 at 2:15 PM George Migliarini wrote:
>
> a simple question, where is my filesm1000.dfuI do not have it, where
> do I get it from?
>
>
>
> Thank you
>
>
>
> George AC6RB
>
>
>
Maybe rename sm1000v2.bin to sm1000.dfu
I'm just guessing...
On Tue, Jul 16, 2019 at 2:15 PM George Migliarini wrote:
>
> a simple question, where is my filesm1000.dfuI do not have it, where
> do I get it from?
>
>
>
> Thank you
>
>
>
> George AC6RB
>
>
>
> From: walt...@k5wh.net
>
Here's how I did it on my Windows 8.1 Pro laptop machine for a friend.
Seemed to work, haven't tested sm1000 yet.
Your Experience May Vary
73, Steve/k5okc
Boot Windows 8
Right-click on Left Window icon and select Driver Manager
Turn on SM-1000 and holding in the PTT button
STM32 BOOTLOADER
> But, we need some "super guru" programmers to optimize the code.
Therein lies the rub...
Stick with x86-64 for public highways. ARM for off-road...
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The 700D modem uses the 700C vocoder:
https://github.com/drowe67/codec2/blob/master/src/codec2.c#L1932
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I believe that "uname -m" and "cat /proc/cpuinfo" and "file /bin/bash" will
give you a hint what you're running.
cpuinfo will list capabilities. GCC usually has runtime switches to enable
optional capabilities.
I believe "gcc -v" will give yo
doing so are
rather antiquated and proprietary (read that insulated), given how Tor
has taken over the word (ZeroTier, etc).
Steve
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On Sat, May 25, 2019 at 9:55 PM Stuart Longland
wrote:
>
> Whilst tethered, you could then turn off WiFi and just use CDC-Ethernet
> to communicate between radio and phone which would further reduce power
> consumption.
I think many are attracted to the ESP-32 for it's built-in wireless.
At
it!
Is there a modern port of Codec2 vocoder for Android? I don't follow
the Android development.
Steve/k5okc
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Aha, well take a look at:
https://github.com/drowe67/codec2/blob/master/src/codec2.c#L1935
It doesn't tell you much though, as that vocoder has pretty complex internals.
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> Where I can find information, which bit corresponds to what per frame in case
> of 700C coding?
See if the file:
https://github.com/drowe67/codec2/blob/master/octave/modem_codec_frame_design.ods
has what you need. Down at the bottom, select the "cohpsk" frame.
One idea I've had is to trade the OFDM pilots in on some BPSK pilots. That
is, sending 160 ms coded preambles instead of 160 ms of OFDM. That way
there would be no CPU sucking DFT. I bet it would paint real nice on the
waterfall or spectrum displays, not being 3 kHz wide.
I bought one of those Leo Bodnar dual frequency GPSDO devices without
running the software first.
It said you can separate the two frequencies by a phase shift. I was
excited to use it with a 90 degree phase shift!
Ack, 90.0 isn't an option. I guess there must be a technical reason for
that, but
"uint" is terrible. Either the "uintXX_t" or "unsigned int"
I can only hope there are no "sint"...
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an alternative to monolith programs.
Steve
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even has some unacceptable
costs for some, but I thought I'd throw this out in the wild as an
option for your toolbox.
https://github.com/srsampson/MemoryPool
Have fun!
Steve/k5okc
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https
Jeroen,
I noticed that David updated his modem design file:
https://sourceforge.net/p/freetel/code/HEAD/tree/codec2-dev/octave/modem_codec_frame_design.ods?format=raw
Lot's of parameters and stuff in there.
Using the ofdm_mod and octave ofdm_rx with those parameters, I get as
output:
Rs=48.78
On Sun, Feb 17, 2019 at 6:47 PM Bruce Perens wrote:
>
> Strings are as fast as integers if you make them static and use their
> address, rather than compare their content.
>
Exactly. I kept the strings as a reference for the verbose output, but
no longer use them in a comparison.
FYI
I compiled the codec2 for the RaspberryPI version 1 Model A.
FDVcore takes 38% of the CPU for 700D mode in RX and 60% in TX.
Overclocking to 950 MHz does very little. It bobbles around 36 to 38% CPU.
TX changed to 56%.
Disclaimer, I had no audio in or out during the test, so maybe RX would
Maybe "renice" it to be the highest priority process.
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"The chip comes with a high-performance microphone array audio processor
for real-time source orientation and beamforming."
Hey, we might need 3-bits allocated to the vocoder for spatial position
indication :-)
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This is what I figured out so far:
Setting a command is done with an "=" character, no spaces.
TEXT=string and the string needs no delimeter
e.g.,
TEXT=CQ CQ DE W1AW Send QSL
SQEN=1
etc
QUIT - Exit program
VERSION - Display version
TEXT - Display or set text data
CLIP - Display number of
The docs are atrocious and don't really match the code. Try an "=" sign,
e.g., text='cq de callsign'
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back to
ofdm_mod/demod and make sure they are working, as we are trying to make
them functional with variable number of carriers.
Let me know if my sugar high has made a mess :-)
Steve
P.S. Happy Saint Valentines Day, and keep your head on!
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PC10 - PC15 seem to have different signal names. Not sure if this is
important, as I think they are just debug pins??
Steve
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hows only the connection from the sm1000 to the radio. It does not
> show using a handheld mic. Where do you speak into?
>
> On 2/6/2019 12:00 AM, Steve wrote:
> > this maybe:
> >
> > https://freedv.org/sm-1000-hardware-howto/
> >
> > On Wed, Feb 6, 2019 at 12:28 AM
this maybe:
https://freedv.org/sm-1000-hardware-howto/
On Wed, Feb 6, 2019 at 12:28 AM K6DLC wrote:
>
>Does anyone have an idea on how to interface a handheld/desk
> microphone to use the sm1000?
>
>
> On 2/4/2019 10:24 AM, Don wrote:
> > I am currently working on getting the 700D mode to
The SM1000 could do FDM and Vocoder in one CPU, but it doesn't have to
be that way. The desktop system currently uses a Vocoder and Modem
interfaced with an API. The API is growing to probably become a
significant module in itself.
I was thinking that the Vocoder and API could be in one product,
512 Meg RAM versus 512k FLASH you make the choice :-)
On Mon, Feb 4, 2019 at 2:02 PM glen english wrote:
>
> suggest The ORANGE PI zero is a tiny inch square PCB and has onboard
> audio. It's what I use quad core A7 etc and NEON.
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not found error
fyi
Probably permissions, where you can see it just fine...
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On Tue, Jan 29, 2019 at 12:54 PM David Tiller wrote:
>
> Wouldn't using FM eliminate the spectral efficiency of 4-FSK?
I was thinking about a PL-Tone and a nice wide signal. Obviously 4FSK
on the lower freqs would be better to use SSB.
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On Mon, Jan 28, 2019 at 8:55 PM Alan Beard wrote:
>
> I read the SVN comments:
> > various new features to vqtrain to support LPCNet work
>
> I'm no software guru, but I wonder if there's anybody looking at networking
> Codec2 sites?
The LPCNet refers to a "Neural network" not an IP network.
I'm not sure why David used strings. I haven't messed with that part
of the code. Possibly it made debugging easier.
On Fri, Jan 18, 2019 at 9:50 PM Đích Kiều wrote:
>
> I think sync_state and sync_state_interleaver should be enum, not string.
> I think to use enum faster than string when
eater didn't have to know
anything about the signal, other than the bit rate. It took fringe
signals, and re-transmitted them in perfect shape.
Food for thought...
Steve
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into 5 kHz.
But some will be horrified at the wider spectrum. Who cares, it's a
satellite going Mach 7, it will be over your house once a week for less
time than it takes a microwave to cook soup :-)
Anyway, that's my thoughts on FM. 100 kHz, with digital stereo.
Steve
--log octave.txt
Steve
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