[time-nuts] Beaglebone Black driver for hardware timer capture

2014-12-01 Thread Dan Drown
I wrote a kernel driver for the BBB timer hardware. It produces pps events for things like ntpd to consume. The source for it is at https://github.com/ddrown/pps-gmtimer A side effect of this driver is it measures the interrupt latency and jitter on the BBB hardware. The attached file interrupt

Re: [time-nuts] Beaglebone Black driver for hardware timer capture

2014-12-02 Thread Iain Young
Hey Dan, You Wrote: I wrote a kernel driver for the BBB timer hardware. It produces pps events for things like ntpd to consume. The source for it is at https://github.com/ddrown/pps-gmtimer A side effect of this driver is it measures the interrupt latency and jitter on the BBB hardware. The

Re: [time-nuts] Beaglebone Black driver for hardware timer capture

2014-12-02 Thread Dan Drown
Quoting Iain Young : : Is your code able to support multiple inputs simultaneously ? FreeBSD's doesn't due to some architecture issue with the timing subsystem as I understand it. Or is it like the FreeBSD code, and I have to select exactly one of TIMER4-TIMER7 input pins to drive the PPS ? In