Re: vector source python block

[Barry Duggan]

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