On 07/13/2012 12:08 PM, Anisha Gorur wrote: > Thanks for the examples, I will definitely be looking into them! > As for links, This one: http://gnuradio.org/cgit/jblum.git/log/?h=next is > broken, it comes from one of the blocks coding guide here: > http://gnuradio.org/redmine/projects/gnuradio/wiki/BlocksCodingGuide/diff/2which > i found really helpful. >
There was a lot of work in various branches off of gnuradio which I had merged into next. That branch is gone, and that work has been combined into the GrExtras project. The link and relevant coding guide was moved/updated: https://github.com/guruofquality/grextras/wiki > I also had one more quick question, I'm getting this error: > 'gr_top_block_sptr' object has no attribute 'add_item_tag', though I > thought add_item_tag was inherited from gr_block. > Thanks again! > Not sure, you might send a code snippet. It looks like you are calling a method of the top block, and not from the block's work function? -josh > On Fri, Jul 13, 2012 at 2:40 PM, Josh Blum <[email protected]> wrote: > >> >> >> On 07/13/2012 10:08 AM, Anisha Gorur wrote: >>> Thanks! >>> Do you by any chance have links to specific code examples that could help >>> out? I've been trying to look at old examples you have posted to others >> on >>> this forum, however, some of the links from github seem to be broken. >>> >> >> Well, I dont have an example from python, but its just the same thing >> without semicolons. So this should be very helpful: >> http://gnuradio.org/cgit/gnuradio.git/tree/gr-uhd/examples/c++/ >> >> Let me know if the links are bad on one of my wiki pages. >> At least I can fix those :-) >> >> -josh >> >>> On Fri, Jul 13, 2012 at 12:52 PM, Josh Blum <[email protected]> wrote: >>> >>>> >>>> >>>> On 07/13/2012 08:51 AM, Anisha Gorur wrote: >>>>> Hello all, >>>>> I've been trying to work with stream tags in python, mainly using the >>>>> grextras blocks coding guide >>>>> here:https://github.com/guruofquality/grextras/wiki/Blo... >>>>> < >>>> >> https://github.com/guruofquality/grextras/wiki/Blocks-Coding-Guide#wiki-the-work-function >>>>> . >>>>> >>>>> I've set up a very simple flow graph, just a vector source, throttle >> and >>>>> file sink, and I would like to place a tag on the first element of the >>>>> vector that contains time metadata. I'm using this code: >>>>> >>>>> def work(self, input_items, output_items): >>>>> item_index = ? #which output item gets the tag? >>>> >>>> set item_index to x so the tag gets associated with outputs_items[0][x] >>>> >>>>> offset = self.nitems_written(0) + item_index >>>>> key = pmt.pmt_string_to_symbol("example_key") >>>>> value = pmt.pmt_string_to_symbol("example_value") >>>>> >>>>> #write at tag to output port 0 with given absolute item offset >>>>> self.add_item_tag(0, offset, key, value) >>>>> >>>>> I think the problem has something to do with not implementing the >>>>> correct modules. My question is, what are the appropriate modules to >>>>> import to read and write stream tags in python? >>>>> >>>> >>>> You might want to look more that that coding guide, at lot of the >>>> snippets are just work functions, but many contain full class >>>> definitions with import statements. For example: >>>> >>>> from gnuradio import gr >>>> import gnuradio.extras >>>> >>>> class my_sync_block(gr.block): >>>> >>>> def __init__(self, args): >>>> gr.block.__init__(self, name="my block", in_sig=[numpy.int32], >>>> out_sig=[numpy.int32]) >>>> >>>> def work(self, input_items, output_items): >>>> #work stuff... >>>> return len(output_items[0]) >>>> >>>> -josh >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> [email protected] >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>> >>> >>> >> >> > > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
