Thank you so much for the response Michael. I will try to figure out what's going on with both ways and I will post updates to the list too.
Thanks, George On Mon, Jun 4, 2012 at 2:30 PM, Michael Dickens <m...@alum.mit.edu> wrote: > Hi George - I believe there are 2 possible solutions, though I've never > used or tested either myself. If you just want to verify that what you > want to do works, I think (1) should be quite straight forward. > > 1) This method will certainly work, but it's not very robust : Make your > "custom_block2" take an argument which is of the "custom_block1" smart > pointer type, such that the amplitude can be set any time the former > performs the computation to do so. Instantiation of the "custom_block2" > would take a smart pointer to the "custom_block1", and then store that > reference for future use; because this is a C++ object, just use "." or > "->" to access the object's variable or method. > > 2) I don't know if stream tags are in place well enough yet, nor if they > would work in the manner you require. The idea is that there's a tag plane > (sort of like a control plane) that "overlays" (or is in parallel with) the > graph (data-flow) plane, where tags can be inserted -- a timestamp, or a > value that might get used downstream. Since "custom_block1" isn't > downstream from "custom_block2", tags might not work. Maybe there's a > branch for this sort of non-downstream async control? > > Hope this helps; good luck! - MLD > > On Jun 4, 2012, at 3:52 PM, George Sklivanitis wrote: > > I am dealing with the problem of finding a way to dynamically give > values to a parameter of a custom block that I 've made in gnuradio > > by the output of another custom block. > > The solution of function probe that I have found in previous > conversations in the forum does not fit me as the value to be changed > dynamically is entered ad-hoc by the user. > > I will try to simplify my problem to the rest of the community by giving > the following example > > let us assume the following flowgraph implementation > > > > signal_source -> custom_block(arg amplitude) -> file_sink (1) > > > > file_source -> custom_block2 -> file_sink (2) > > > > Would it be possible to use as the amplitude argument in (1) the output > of the custom_block2 in (2). > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -- Sklivanitis Georgios Postgraduate Student Telecommunications Division Technical University of Crete ECE Dept. Tel. : 28210 59257
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