Fw: linrad 3.48 and raspberry pi + fifi-sdr

[Gunter Bohn]

Hi Leif,

 

I would use the raspberry -pi and the fifi-sdr with linrad.

 

Install linrad 3.48 - okay , FiFi-Sdr also okay, can install soundcard and si570 - usb .  

 

Programms runs 3 - 4 sec, then rx - over-run error

(CPU nearly 100 %) - no reaction.

 The Screen  see gif below.

 

Thanks and 73 Gun / DL2RUG

 

 

 

[Leif Asbrink]

Hi Gun,

Seems your system is overloaded. Try to set the fft1 window size N = 0
(unwindowed FFT) If it starts running, try the different fft1 versions.
The cpu load may differ.
You might try to increase the fft1 storage time slightly
and perhaps check whether the fft1 size affects cpu load much.
It could be important to make the fft1 size small because
if the CPU has a small cache it helps to keep the fft inside
the cache memory.

Press T to get the timings for individual threads.

Also run top to see how much overhead you have from X11.

I guess the fifi-sdr is using the sound sub-system.
Make sure that you do not invoke extra processes from
pulseaudio or something. It is probably best to avoid
Portaudio, but one never knows.

It would be much better to run in terminal mode but
for that you would have to install svgalib. There is no
reason to have a working module for your graphics,
with flinrad you would use the front buffer device directly
but svgalib is required for the mouse.

Anyone has an idea for another way to get mouse support?
I tried GPM but mouse then has a resolution corresponding to
the characters of a text screen:-(

73

Leif

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[N7IHQ]

On Friday, April 19, 2013 10:38:38 AM UTC-7, rennste...@t-online.de wrote:

I would use the raspberry -pi and the fifi-sdr with linrad.

 

Install linrad 3.48 - okay , FiFi-Sdr also okay, can install soundcard and si570 - usb .  

 

Programms runs 3 - 4 sec, then rx - over-run error

(CPU nearly 100 %) - no reaction.

Hi Gun,

Can you reduce the sample rate of the FiFi-Sdr sound card? When I run Linrad on my Raspberry Pi at 48 KHz sampling rate, the CPU usage is 77%. At 32 KHz, CPU usage is 48%.

73,

Jim
N7IHQ

[rennste...@t-online.de]

Hi Jim,

sorry the sample-rate only 48000 or 96000, when linrad stopps - sampe - rate like 46000 - 47000.
Flinrad stoppt also with svgalib no ega-vga found.

I will try to run other parameter-varification of linrad, if possible.


Thanks and 73 Gun DL2RUG

[rennste...@t-online.de]

Am Freitag, 19. April 2013 19:38:38 UTC+2 schrieb rennste...@t-online.de:

[rennste...@t-online.de]

Hi Leif,

I think now is all okay.
I installed a new SD-Card with Debian wheezy, an then xlinrad.
The program runs now stabil in the newcomers mode.
Many thanks and 73

de DL2RUG / Gun

Am Freitag, 19. April 2013 19:38:38 UTC+2 schrieb rennste...@t-online.de:

[Paolo Mattiolo]

Hello Gun,

so do you confirm that fifi sdr, raspberry pi and linrad combination is working with a 48khz sample rate?

I'm trying tho replicate the same setup with a beagle board xm .

73 de IN3AQK