Pluto is broken for latest code from GitHub

[Philip Johnson]

I built from the latest code on GitHub.  My Pluto no longer works, sdrplay is ok.

This is what I see.

Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513612
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513613
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513614
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513615
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513616
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513617
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513618
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513619
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513620
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513621
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513622
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513623
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513624
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513625
Device plutosdr ret=0, flags=0, timeNs=1 b0 0.000000 b1 0.000000 witch 513626

[Philip Johnson]

Version 1.24 still works great.

[Dale Ranta]

If this is on windows, I built Version 1.24 using the -

PothosSDR-2021.05.01-vc16-x64.exe

other versions may have a problem.

[Dale Ranta]

I have been making a lot of changes to SdrGlut the last few days - I just cleaned up a few problems - so you better get the latest version.

[Philip Johnson]

Just pulled and built the latest version from GitHub.  The hardware is a Raspberry pi4 running Ubuntu. The problem remains, SDRPlay RSPA1 works fine, Pluto barfs.  Version 1.24 built from source works fine.

[Dale Ranta]

Are you saying that you can run version 1.24 and everything is Ok, but when you try the latest version it generates the error messages. After it fails, does it work of you go back to version 1.24.

When it generates those error message, you can usually clean it up by right clicking and open the "SDR Dialog..." In the SDR Dialog, hit the "Apply" button to reset things - this works 9 out of 10 time.

I have never run Ubuntu on the PI - which versions are you using ?

If that does not, you will have put in some code to get additional information about the error.

[Dale Ranta]

Another thought came up - right click and try all of the SampleRates in the list - sometimes they do not all work.

[Philip Johnson]

This might be a clue. the 1.24 version prinst this at start up.

StreamFormats 0 CS8
StreamFormats 1 CS12
StreamFormats 2 CS16
StreamFormats 3 CF32
rx->biasMode ''
playRadio frequency 1e+08 channel 0

Device plutosdr samplerate 1999999 rx->size 200000 Bandwidth 1000000
ProcessSound start

The new code prints this.

StreamFormats 1 CS12
StreamFormats 2 CS16
StreamFormats 3 CF32
rx->biasMode ''
MTU 0
playRadio frequency 1e+08 channel 0
Device plutosdr samplerate 3999999 rx->size 400000 Bandwidth 1000000

So samplerate, x->size and Bandwidth got changed.  Also where did MTU 0 come from.

[Philip Johnson]

I discoverd that if I change line 1725 in RaceFastsdr.cpp back to

                if(iread > 500000)iread=500000;

Things work again.

[Philip Johnson]

My sdrplay works fine with this change also.

[Philip Johnson]

After some poking aroud, This is what I think you need.

if(rx->MTU > 0 && iread > rx->MTU) iread=rx->MTU;

[Dale Ranta]

The MTU was something for the icr8600. it turned out that it did not work anyway. MTU is something that according to the documentation should never be zero - I knew - it was dumb trust them and I almost put in what you suggested.

[Dale Ranta]

SoapyRemote uses the MTU a lot which means will not work with the Pluto - unless they just make up a value to use.