Re: [Discuss-gnuradio] Custom C++ blocks on E310

Hey Jessica -

The SIGBUS you are receiving indicates that there is likely some funniness happening with memory addressing / access somewhere. Especially since your test flowgraph is so simple, using GDB to get a backtrace might point you to the offending code pretty quickly. For more details on how to do this, check out this page on our Wiki: https://wiki.gnuradio.org/index.php/TutorialsDebugging#Expert_debugging_tools

Have you tried this already? If so, can you share the backtrace?

Cheers,

Ben

On Thu, May 11, 2017 at 6:15 PM, Jessica Iwamoto <jessica.iwamoto@aero.org> wrote:

Hi again,

 

Attached is the code that I'm using if anyone would like to try to replicate my issue. The test_msg_py.py file contains the custom python block code for a simple message sink. The test_msg_impl.cc, test_msg_impl.h, and test_msg.h files contain the custom C++ code for a message sink. The test.py file contains a simple flowgraph that connects a message strobe to my custom message sink blocks. When I run test.py with either of the blocks on my desktop, it works correctly. However, when I run test.py after cross compiling on the E310, it works correctly with the test_msg_py block and produces the following error with the test_msg block:

Could not find port: in in:

system

Bus error

 

Thanks,

Jessica

 

From: Discuss-gnuradio [mailto:discuss-gnuradio-bounces+jessica.iwamoto=aero.org@gnu.org] On Behalf Of Jessica Iwamoto
Sent: Wednesday, May 10, 2017 9:53 AM
To: discuss-gnuradio@gnu.org
Subject: [Discuss-gnuradio] Custom C++ blocks on E310

 

Hi all,

 

I have built custom C++ blocks that work on my PC, but don't work when cross compiled for the E310. Specifically, I am trying to build a custom C++ block with a message port and cross compile it for the E310. I am using version 3.7.12 of GNU radio and the latest version of the SDK/toolchain for the E310. I have built a simple message sink block with just a message input port and put it in a flowgraph with a message strobe. My code runs correctly on my PC but when I run it on the E310, I get the error:

Could not find port: msg in:

system

Bus error

 

I am able to create custom python blocks with message ports and run them on the E310 and my PC with no issues. Additionally, I am unable to create custom C++ blocks with normal input and output streams on the E310 (the program seg faults when I try to connect the custom block to another block), but they run correctly on my PC. Any suggestions on what could be causing this?

 

Thanks,

Jessica

 

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