Hi Nathan,
Thank you very much for the suggestions. I will try them.
Regards,
Hasini
On Tue, Sep 20, 2016 at 11:44 PM, West, Nathan
wrote:
> Do you really need the count, or do you just need some code to process
> FFTs as the block computes them? I suspect a little bit more understanding
> of
Do you really need the count, or do you just need some code to process FFTs
as the block computes them? I suspect a little bit more understanding of
GNU Radio will help you achieve what you want.
Assuming that I have some DSP stuff I want to operate on an FFT output, I
would go about this in one o
Hi Nathan,
That's not quite what I want. I do not want the file to have a certain
number of FFTs. I want to have a counter which is dynamically updated as
the FFTs are written to a file. Ideally I want to know when a new FFT is
written to the file so I can trigger another function to process it. I
On Mon, Sep 19, 2016 at 6:57 AM, Hasini Abeywickrama
wrote:
> Hi Marcus,
>
> That's what I'm currently doing. It's not very efficient as I have to
> constantly check the file size. If I can have a counter that is increments
> each time an FFT is written to the file by the flow graph I would be ab
But how would that triggering work, and what would be triggered?
There's no other way than looking at the file itself to know how much has been
written already; this boils down to the very Unix discussion of how atomic
write() system calls should be in effect.
Best regards,
Marcus
Am 19. Septem
Hi Marcus,
That's what I'm currently doing. It's not very efficient as I have to
constantly check the file size. If I can have a counter that is increments each
time an FFT is written to the file by the flow graph I would be able to trigger
an event based on the counter value. That was my conce
If you need to do that externally, I'd just watch the file size and
divide it by the item size (4B per floating point number) and by the FFT
length.
Best regards,
Marcus
On 09/18/2016 11:21 PM, Hasini Abeywickrama wrote:
> Hi Marcus,
>
> It's like I need to start reading and processing the fil
Hi Marcus,
It's like I need to start reading and processing the file after a certain
number of FFTs are being written to the file. For that I would need to
maintain a counter and I'm trying to figure out how to do it.
Regards,
Hasini
On Mon, Sep 19, 2016 at 2:58 PM, Marcus Müller
wrote:
> What
What would you need that counter for? There's the 1/(FFT length) fixed
relation between samples processed and numbers of FFTs done, so this is
pretty much a redundant piece of info, but maybe I'm just missing the
use case.
Best regards,
Marcus
On 09/18/2016 10:23 PM, Hasini Abeywickrama wrote:
Hi all,
I have a GNU Radio flowgraph which uses a USRP to receive a signal,
converts it to log power FFT and then writes the result to a file, using
File Sink. I want to have a counter which increments with each FFT written
to the file.
Is there a way of maintaining and increasing count of the FF
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