SD card -image- for the beaglebone

[George Neville-Neil]

On Jan 31, 2013, at 10:36 , Ian Lepore <ian at FreeBSD.org> wrote:

> On Thu, 2013-01-31 at 11:02 +0000, Iain Young wrote:
>> Hi Folks,
>> 
>> I have just taken delivery of a few Beaglebones that I am intending to
>> do some NTP Work. With FreeBSD having one of the better reputations
>> with regards to Time and PPS etc, I thought I would install FreeBSD on
>> at least one of them.
>> 
>> Unfortunately, all of the guides I've found all assume you have a
>> FreeBSD box already running. Unfortunately, I don't, and nor do I have
>> a spare x86 box to do so.
>> 
>> Does anyone have an *image* of a base install for a 4 Gig microSD
>> card that I can download ? Preferably with ssh and dhcp installed
>> (yes, I know about blowing away the keys), as that would avoid having
>> to rely on the console.
>> 
>> Quite happy to rebuild the kernel and world afterwards (yes, I know I
>> need an 8 Gig SD card), but it's just this bootstrapping problem thats
>> an issue...
>> 
> 
> So you're interested in a PPS driver for BeagleBone?  That would be fun
> to play with, I wonder what the BB's timer hardware looks like?  It'd be
> easy enough to do with a gpio interrupt I suspect, but the timing geek
> in me can't resist going for the nanosecond-accurate measurements when
> possible, even if it is kind of pointless for millisecond-accurate NTP.
> 

Ah, but PTPd would be very happy with nanosecond accuracy.  The biggest
problem I see in PTPd on something like a BeagleBone is the network
interface.  We need to get that cleaned up and then see how much jitter it has.

Best,
George