Sent from my T-Mobile 4G LTE Device Original message From:
Richard Cochran Date: 11/13/2015 1:56 AM
(GMT-06:00) To: Bassam Alsanie Cc:
[email protected] Subject: Re: [Linuxptp-devel] Frequency
offset computation
On Thu, Nov 12, 2015 at 02:37:53PM
On Thu, Nov 12, 2015 at 02:37:53PM -0600, Bassam Alsanie wrote:
> I will be going over the PHC APIs and some of the kernel PHC modules to get
> deeper understand.
> Just to let you know why my questions seem little bit weird. I am working
> on developing a user mode framework for to accessing the h
On Thu, 2015-11-12 at 14:37 -0600, Bassam Alsanie wrote:
I will be going over the PHC APIs and some of the kernel PHC modules to get
deeper understand.
Just to let you know why my questions seem little bit weird. I am working on
developing a user mode framework for to accessing the hardware (for
On Thu, Nov 12, 2015 at 11:16 AM, Richard Cochran
wrote:
> On Thu, Nov 12, 2015 at 10:15:04AM -0600, Bassam Alsanie wrote:
> > and my custom clock I can compute the frequency shift as the following:
> >
> > __u16 fraction = ((__u64) tx.freq & 0x);
> > __u16 integer = (__u64) tx.f
On Thu, Nov 12, 2015 at 10:15:04AM -0600, Bassam Alsanie wrote:
> and my custom clock I can compute the frequency shift as the following:
>
> __u16 fraction = ((__u64) tx.freq & 0x);
> __u16 integer = (__u64) tx.freq >> 16;
> __u64 requestedPpb = (integer * 1000) + fraction;
>
>
On Thu, Nov 12, 2015 at 2:08 AM, Richard Cochran
wrote:
> On Wed, Nov 11, 2015 at 02:37:28PM -0600, Bassam Alsanie wrote:
> > I need to make my homework first.
> > After looking into the function adjtimes things made more sense to me.
> > The missing piece in my understand for now that the timex.
On Wed, Nov 11, 2015 at 02:37:28PM -0600, Bassam Alsanie wrote:
> I need to make my homework first.
> After looking into the function adjtimes things made more sense to me.
> The missing piece in my understand for now that the timex.freq unit is in
> ppm and its long, so no fractions for the ppb.
I need to make my homework first.
After looking into the function adjtimes things made more sense to me.
The missing piece in my understand for now that the timex.freq unit is in
ppm and its long, so no fractions for the ppb.
After I looked into the kernel module igb_ptp.c it has a function to adju
