Hi Nigel,
the problem is that these variables are very much a GRC construct,
not really GNU Radio. So, if you want something that you can update
dynamically, I'd rather recommend implementing message
passing/handling (like the USRP source, for example, which has such
an input port, grey in GRC), so you can send messages from any block
(or really, any piece of code) to your block.
Indeed, if you'd really like to have something like a GUI slider
that changes a parameter of your block, you just define a
<callback> element in your block XML; see the gr::blocks::head
block XML as an example[1], where you can define a callback for the
number of items after which to stop.
Basically, it's just
<callback>function($changed_parameter)</callback> at the
right position.
Best regards,
Marcus
[1]
https://github.com/gnuradio/gnuradio/blob/master/gr-blocks/grc/blocks_head.xml#L12
On 01/31/2016 03:21 PM, Nigel Steed
wrote:
Hi,
Can anyone help point me in the right
direction for implementing a dynamic variable as a parameter
within my own OOT module. For example, the same way UHD Source
RF Frequency parameter works which you can then adjust at
runtime.
Thanks,
Nigel
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