Re: [Discuss-gnuradio] serial port source/sink

[Marcus Müller]

Hi Julián,

interesting!
I think I might be misunderstanding what's happening here, so I think we should make a sketch of what I think you're doing:

"data" --> Ground control station --> TX Antenna --> Air --> RX Antenna UAVdevboard

Is that correct?

Greetings,
Marcus

On 29.10.2014 15:43, Julián Andrés Quenardelle wrote:

Hey there! I'm gonna explain a bit of what i'm doing. I'm trying to conect
a laptop with a ground control station software to an uavdevboard (UDB4). I
want to get data stream through gnuradio, i want to make it serial because
of previous work. I can set up the baudrate of transmision at my software
(running on windows bdw) and my devboard too, i don't know if that would
affect the TTY I/O on Unix (that was a good idea btw, gonna work over
that). However, my inteface is an USB/Serial cable if thats what you're
asking, i didnt use the RS232 standard, just needed TxRx pins from the
devboard.

2014-10-28 20:57 GMT-03:00 Marcus Müller <address@hidden>:

 Agreed, but as soon as device setup is through with your device (thus the
"properly configured character device") and your reading program behaves
nicely (which I'd expect GR's file_sink to do), just reading from a
character device should work, if I'm not mistaken.

However, this brings us to a new question: "serial" doesn't really say
what kind of interface we're talking about; there's a whole lot of bytes
that you can not send over a 1980's style UART as used for the RS-232
peripheral on PCs, and thus the data that comes in over that has to be
decoded first; you could write a block that converts these bytes to bytes,
or, and this is more likely, you already have software that does that, and
writes the result to a file, or prints it on standard output. You could
then connect the output of that to GNU Radio, e.g. using a named pipe.


On 29.10.2014 00:21, Marcus D. Leech wrote:

On 10/28/2014 06:34 PM, Marcus Müller wrote:

Hi Julian,
this really depends on how your serial data gets into your PC, but
assuming you're on linux and have the data coming in over a properly
configured character device (ie. something that appears as /dev/ttyS* or
the like), you could just use the file source and open that device.

Greetings,
Marcus

TTY I/O on Unix is a bit weird.  You'd have to open it, and configure it
(into RAW mode for one).


On 28.10.2014 19:35, Julián Andrés Quenardelle wrote:

Hey there! i'm working on a proyect of comunications and i need to get my
serial data stream into gnuradio companion, so i'm looking for a block (2
actually) that can make this work, i tried to install pyserial and
gr-pyserial but repository is down, so i'm looking for alternatives, that
make me skip programming it myself (becoues of my low programing skills ),
so i though serial port is pretty comun, some one else had to build it
before, if you know some blocks which could help me i would be very
thankfull



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