leansdr make embedded issue for plutosdr about leansdr HOT 5 OPEN

Hi again

I am still stuck on the make embedded part. Some help would be appreciated.

The output for make embedded after generating the libiio.a file is
g++ -O3 -I.. -DVERSION="leansdr-1.2.0-27-ge6416aa" -Wall -Wno-sign-compare -Wno-array-bounds -Wno-unused-variable -Ilibiio leaniiorx.cc -lfftw3f -lpthread -Llibiio -L. -liio -lpthread -lxml2 -lz -llzma -static -o leaniiorx.x86_64
/usr/bin/ld: dynamic STT_GNU_IFUNC symbol strcmp' with pointer equality in /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/libc.a(strcmp.o)' can not be used when making an executable; recompile with -fPIE and relink with -pie
collect2: error: ld returned 1 exit status
Makefile:83: recipe for target 'leaniiorx.x86_64' failed
make: *** [leaniiorx.x86_64] Error 1

from leansdr.

It looks like you are running "make embedded" on a x86_64 machine, so the Makefile is trying to generate a binary for x86_64. If this is really what you want, try the same command without "-static".

But leaniiorx is intended to run on-board the plutosdr. The Makefile can generate a portable (static) plutosdr binary if you run it on another arm-linux board (e.g. raspberry pi with some versions of the OS) with libiio already compiled, but that was a quick hack. The proper approach is documented at https://wiki.analog.com/university/tools/pluto/devs/embedded_code , but that's a lot more work.

You can also test leansdr binaries from leantrx to decide whether you really want to recompile the latest version. Download from https://www.pabr.org/radio/leantrx/leantrx.en.html#plutosdr_net_install

from leansdr.

Hi

I solved it. I removed the previous installation and did a new clean install and everything worked.
Thanks.

I have another question though, I want to use leandvb to offline decode the dvb-s2 I have pre-recorded. Now the data type I have is from Matlab using AD936x and its in double complex IQ.
How can I convert it to the data type supported by leandvb.

I have the following formats I can receive the dvb-s2 in Matlab:

1. int16 — Integer values are the raw 16-bit I and Q samples from the board. The 12-bit value from the ADC of the AD9361 RF chip is sign-extended to 16 bits.

2. single — Single-precision floating point values are scaled to the range of [–0.0625, 0.0625]. The block derives this value from the sign-extended 16 bits received from the board.

3. double — Double-precision floating point values are scaled to the range of [–0.0625, 0.0625]. The block derives this value from the sign-extended 16 bits received from the board.

I have been trying to convert using typecast but its not working.
Thanks !

from leansdr.

Also, is there a way I can integrate leandvb in my Matlab code? I am looking for a dvb s2 decoder.

from leansdr.

Hopefully a Matlab expert will be able to answer your question. There's probably a way to write IQ data to a file in binary mode using "single" format ("Single-precision floating point values"), then execute leandvb from Matlab with a system() command, then read the resulting MPEG TS file.

from leansdr.