Alexandru- I thought I would revisit the "dynamic file creation" issue under GRC. The last suggestion was to simply code this up as a GRC custom block. I was hoping to get some help from you on this, since my GRC/python programming skills are very limited. I have modified a simple GRC-created python code by hand to implement your dynamic filename creation capability. It seems to work- a new file is created each time I click the button, but as I said it is hand-generated in python. Any chance you could try to implement this as a GRC block? I've attached the code, and annotated the relevant sections with the words "File Recording".
I really think this would be a great addition to GRC. Any help would be appreciated. Thanks, eric --- On Thu, 1/20/11, Alexandru Csete <oz9...@gmail.com> wrote: > From: Alexandru Csete <oz9...@gmail.com> > Subject: Re: [Discuss-gnuradio] filename using time-stamp in GRC > To: discuss-gnuradio@gnu.org > Date: Thursday, January 20, 2011, 11:41 AM > On Thu, Jan 20, 2011 at 5:41 > PM, <emat...@yahoo.com> > wrote: > > > ... > > Following up on this, I found this site that had some > useful suggestions:http://www.oz9aec.net/index.php/gnu-radio/grc-examples > > > > A grc example is provided that implements a dynamic > time stamp, but NOT a button to control it. So I am trying > to use a Variable Chooser to select between "/dev/null" and > the filename that is based on the time-stamp. However, > nothing is generated. In particular, I have: > > > > A file sink with File: recfile > > A Variable with ID prefix with Value "./" > > A Variable Chooser with ID: recfile, Default Value: > "/dev/null" and > > Choices of "/dev/null" or "prefix + > datetime.now().strftime("%Y.%m.%d.%H.%M.%S") + ".bin" > > > > I was hoping this would dynamically create a file with > the current time stamp for the name, but no files are > actually being generated. Could this be and issue related > to a bug that is described in the link below? > > > > http://lists.gnu.org/archive/html/discuss-gnuradio/2011-01/msg00080.html > > > > If so, will this approach work if I upgrade via git? > > > > Hi Eric, > > The problem with this simple example is that the variable > containing > > "prefix + datetime.now().strftime("%Y.%m.%d.%H.%M.%S") + > ".bin" > > is evaluated when you start the script, so it will only > work for a > single file per execution. I believe it is for the same > reason that > you see no file with your modification: The file sink is > initialized > with /dev/null as filename and it can not change the file > name during > runtime because the required code for "close file, set new > file name, > open new file" is not generated by GRC - I am not exactly > sure about > this but it should be obvious if you look in the generated > code. I > would try to do as Josh said in the other mail, implement > the required > code yourself and embed it as a custom block. > > Alex > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
dynamic_file_prototype.py
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