2-clock problem, Osmocom Source & Freq Offset, ALSA buffer etc

2020-06-25 Thread Da Fy
Hi All, Sorry for the longish post. I have a receiver using an RPi4 & an RTL-SDR dongle that outputs audio via the analogue jack- I'd like a low cost solution. I need the time delay through the system to be constant & the 2-clock problem means it won't be. I can make the phase difference between

GPIO lines on RPi4

2020-06-18 Thread Da Fy
Hi All, does anyone have an example of how to control GOIO lines on the RPi4 from within a GRC flowgraph. I’m guessing it’s an OOT module. I need to generate a signal of a few 100Hz & control GPIO lines at various points though the cycle. Alternatively, I could generate the signal & lines