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[Discuss-gnuradio] Using PPS as a sampling trigger
From: |
rmsrms1987 |
Subject: |
[Discuss-gnuradio] Using PPS as a sampling trigger |
Date: |
Mon, 13 Feb 2012 08:21:06 -0800 (PST) |
Hello Everyone,
I am a relatively new user to the USRP2 and currently would like to make
some changes to how an external PPS signal is deciphered. As of now, I
believe that once the first rising edge of a PPS signal is detected, the
USRP2 will continually collect data until it is programmed to stop. What I
am hoping to do is collect data when the PPS sends a rising edge and pause
the data collection when a falling edge is detected. Basically the external
PPS signal is going to act as a TR switch. So far I have been looking
through the rx_timed_samples.cpp and the header file clock_config.hpp
programs to plan out my approach. The problem where I am getting stuck is
telling the USRP to pause data collection on a falling edge. I have not
found any function in the libraries that is able to do this. Has anybody
been able to program the PPS input to act as a TR switch or have any ideas
about how to about this? Any information on this would be greatly
appreciated.
Thank you very much,
Rob
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