Re: GPIO lines on RPi4

2020-06-22 Thread Marcus Müller
It gets even better: We've launched a feature in 3.8.1.0 (and on master before that, as we do with any feature that ends up in a maintenance release) that we hope doesn't come back to bite us due to enabling unclean design. But, we must build best practices so that it doesn't go unused, either

Re: GPIO lines on RPi4

2020-06-22 Thread Albin Stigö
It might be difficult to control GPIO with precise timing on raspberry pi depending on what you want to do... A few hundred khz might be ok though. libgpiod is the new better Linux GPIO API. --Albin On Mon, Jun 22, 2020, 13:25 Marcus Müller wrote: > It gets even better: > > We've launched a fea

Re: GPIO lines on RPi4

2020-06-22 Thread jean-michel.fri...@femto-st.fr
The envisioned application is event driven: send a control word from a client, wait for the even to complete (e.g. move antenna to target position), start streaming data for a given amount of time, and when enough data is collected move to new position. Of course timing cannot be relied on with a

Re: GPIO lines on RPi4

2020-06-22 Thread Albin Stigö
Seems like you already understand the limitations! Good luck with you project! --Albin On Mon, Jun 22, 2020, 14:30 jean-michel.fri...@femto-st.fr < jean-michel.fri...@femto-st.fr> wrote: > The envisioned application is event driven: send a control word from a > client, > wait for the even to com