Hi Jeff, Thank you so much for the helpful reply. So I hope you don't mind, but I'm wondering if you could elaborate a little on how you would implement using state variables to keep things in order, and how you would go about registering the message handler late, as you said? I am new to some of the terminology, so just want to make sure I implement things correctly. Thanks tremendously for your time and help!
Cheers, Ellie On Thu, Jul 9, 2020 at 12:37 PM Jeff Long <willco...@gmail.com> wrote: > > This is true, message handling is independent of stream handling. You may be > able to add state variables to keep things from happening out of order, and > _maybe_ you can register the message handler late? > > On Thu, Jul 9, 2020 at 12:01 PM Ellie White <elliewhite1...@gmail.com> wrote: >> >> Hey all, >> >> I've got a question about message handling in GNU Radio. I'm working on >> developing an out of tree module for controlling the Allen Array, and I'm >> currently working on a set of two blocks which are supposed to interact via >> messages, control.py and trackscan.py; note that "control" receives the >> messages and "trackscan" receives them. The code can be found here (please >> forgive the messiness, I've not had a chance to tidy it up yet): >> https://github.com/SETIatHCRO/gr-ata/tree/master/python >> >> I'm struggling because I can't seem to figure out why it is that when I put >> both of these blocks in a flowgraph, connect them, and run it -- the start >> function for the "control" blockseemingly gets called *before* the message >> handler function, and thus it acts like the obs_info dictionary is empty. >> (https://github.com/SETIatHCRO/gr-ata/blob/master/python/control.py#L54) >> Does anyone have any advice on this? This is my first time writing >> message-passing blocks so I am unfamiliar with the process. If I need to >> clarify any of the above please let me know and I'd be glad to. Thanks so >> much for your time and help -- I appreciate it! >> >> Cheers, >> Ellie >> >> -- >> Ellie White >> Co-Director, Open Source Radio Telescopes >> Student at Marshall University >> 304-654-9381 >> www.catseyeenterprises.net -- Ellie White Co-Director, Open Source Radio Telescopes Student at Marshall University 304-654-9381 www.catseyeenterprises.net