Slanker Message Board Forum Index Slanker Message Board
Board Disabled. Please use: https://digital.kc9uhi.net/
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

DSD and DMR
Goto page Previous  1, 2
 
Post new topic   Reply to topic    Slanker Message Board Forum Index -> Radio Stuff
View previous topic :: View next topic  
Author Message
kb9mwr



Joined: 01 Nov 2006
Posts: 389
Location: Green Bay, WI

PostPosted: Sat Feb 11, 2017 11:09 pm    Post subject: Reply with quote

Alright, so now I figured you used DSD to monitor test the MMDVM P25 thing you are working on. Couple questions... I am pretty sure the Thumb AMBE doesn't do P25's IMBE right? So that is why you figured out how to use DSD with MBELIB... Was that DSDCC, or just the old DSD? I never figured out the error writing to output error with DSDCC. You didn't mention that error when using the ThumbDV with DSDCC. Do you get it like me when using MBELIB, or am I retarded?
Back to top
View user's profile Send private message Visit poster's website
kc9uhi



Joined: 27 Feb 2012
Posts: 157

PostPosted: Sun Feb 12, 2017 2:30 pm    Post subject: Reply with quote

- Using old DSD+ on windows to monitor p25, as I don't think the new dsdcc does p25.

- no 'writing to output' error using ambe dongle with dsdcc, only with mbelib

- According to the AMBE3000 chip datasheet, vocoder rate #33 is compatible with P25 half rate (phase 2), DMR, and dPMR. Does not do IMBE
Back to top
View user's profile Send private message Send e-mail
kb9mwr



Joined: 01 Nov 2006
Posts: 389
Location: Green Bay, WI

PostPosted: Sun Feb 19, 2017 3:50 am    Post subject: Reply with quote

I am pretty sure the error writing to output is because dsdccx needs to be told to output to the MBELIB (as that is what creates the synthesized audio)...

From the Building section at:
https://github.com/f4exb/dsdcc

Quote:
So the full cmake command with a custom installation directory and mbelibsupport will look like: cmake -Wno-dev -DCMAKE_INSTALL_PREFIX=/opt/install/dsdcc -DUSE_MBELIB=ON -DLIBMBE_INCLUDE_DIR=/opt/install/mbelib/include -DLIBMBE_LIBRARY=/opt/install/mbelib/lib/libmbe.so ..


Problem is those paths don't exist on the pi.

I see this:
/home/pi/mbelib/build/libmbe.so

Not sure about the include path.
Back to top
View user's profile Send private message Visit poster's website
kb9mwr



Joined: 01 Nov 2006
Posts: 389
Location: Green Bay, WI

PostPosted: Mon Nov 20, 2017 12:17 pm    Post subject: Reply with quote

DC7DS says use dsdcc, runs quite well on odroid xu4, could also run on raspi3.
He also uses in conjunction with OpenWebRX :
https://www.youtube.com/watch?v=vlBbsC6iVPw&feature=youtu.be

Oddly enough he followed my info:
http://www.qsl.net/kb9mwr/projects/dv/pi-rtl-dsd-experiments.pdf

I may need to mess with this again soon. Would welcome feedback from anyone else who cares to give it a stab again.

N4WCQ says "I run DSD on an odroid and decode p25 and nxdn. I tried the Raspberry Pi but at the time it just did not have enough horse power. The Pi3 may work as it is faster and multicore."
Back to top
View user's profile Send private message Visit poster's website
kb9mwr



Joined: 01 Nov 2006
Posts: 389
Location: Green Bay, WI

PostPosted: Fri Nov 24, 2017 7:11 pm    Post subject: Reply with quote

Still over 100% CPU in a Pi3... So the question is what other single board computer would be the next best runner up.
Back to top
View user's profile Send private message Visit poster's website
kb9mwr



Joined: 01 Nov 2006
Posts: 389
Location: Green Bay, WI

PostPosted: Thu Aug 20, 2020 8:31 pm    Post subject: Reply with quote

https://github.com/LouisErigHerve/dsd

Support dPMR
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Slanker Message Board Forum Index -> Radio Stuff All times are GMT - 6 Hours
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group