Re: vector source python block

[sarandis. Doulgeris]

Hello Barry.

The flowgraph and you epy_block whas really helpful with my understanding of pmt and messages, which was not the point of the email

Thank you so much for your time

Στις Πέμ, 19 Δεκ 2019 στις 3:44 π.μ., ο/η Barry Duggan <address@hidden> έγραψε:

Hi,

For those who are interested I have added the flowgraph to the README.md
page of https://github.com/duggabe/gr-morse-code-gen

Yes, I was trying to show how vectors generated in a Python block can be
fed into a flowgraph. In my case it is to key a tone with Morse code.

---
Barry Duggan KV4FV


On 2019-12-18 04:43, Kyeong Su Shin wrote:
> Hello Sarandis (and to whom it may concern):
>
> The GRC file in concern is apparantly written for GNU Radio 3.8, and
> is not backward compatible to GNU Radio 3.7. I suspect that you are
> using GNU Radio 3.7.
>
> I can provide the compiled version of the flowgraph, but it will
> require GNU Radio 3.8 to run anyway. Instead, you can look at
> "epy_block_0_0.py (
> https://github.com/duggabe/gr-morse-code-gen/blob/master/epy_block_0_0.py
> )", because I guess that is what Barry wants to show you (maybe I am
> wrong, though). You may need to make a few changes due to Python 2 /
> Python 3 compatibility issues, but with that, you should be able to
> embed that code to your flowgaph using a "Python Block" (for testing
> purposes, maybe).
>
> Regards,
> Kyeong Su Shin
> ________________________________
> 보낸 사람: sarandis. Doulgeris <address@hidden> 대신
> Discuss-gnuradio
> <discuss-gnuradio-bounces+ksshin=address@hidden>
> 보낸 날짜: 2019년 12월 18일 수요일 오후 5:53
> 받는 사람: Barry Duggan <address@hidden>
> 참조: Discuss Gnuradio <address@hidden>
> 제목: Re: vector source python block
>
> Thanks Barru but i have a minor problem opening the grc file
> Loading: "C:\Users\infrared\Documents\gnuradi_whatevers\MorseGen.grc"
> Error:
> file:/C:/Users/infrared/Documents/gnuradi_whatevers/MorseGen.grc:1:1:FATAL:PARSER:ERR_DOCUMENT_EMPTY:
> Start tag expected, '<' not found
>>>> Failure
>
> Στις Τρί, 17 Δεκ 2019 στις 11:34 μ.μ., ο/η Barry Duggan
> <address@hidden<mailto:address@hidden>> έγραψε:
> Hi,
>
> Without seeing your flowgraph, it is hard to tell what you plan to do
> with the vectors. In gereral, the "speed" ultimately is determined by
> input and/or output devices such as USB or a sound card. If you have
> neither one, a throttle block will limit the throughput.
>
> As an example of a custom vector source, see
> https://github.com/duggabe/gr-morse-code-gen which generates vectors of
> dots and dashes for Morse Code. If you start at the audio output
> (48khz)
> and work backwards, you will see how the sample rates determine the
> desired speed in words per minute.
>
> If you haven't already done so, it would be helpful for you to work
> through the
> https://wiki.gnuradio.org/index.php/Tutorials#Guided_Tutorials
>
> Let us know if you have more specific questions.
>
> Best wishes,
> --
> Barry Duggan KV4FV