> -----Original Message----- > From: Keller, Jacob E [mailto:jacob.e.kel...@intel.com] > Sent: Monday, January 14, 2019 7:41 AM > To: Richard Cochran <richardcoch...@gmail.com> > Cc: linuxptp-users@lists.sourceforge.net > Subject: Re: [Linuxptp-users] How to properly use twoStepFlag=0 > > > -----Original Message----- > > From: Richard Cochran [mailto:richardcoch...@gmail.com] > > Sent: Sunday, January 13, 2019 12:57 PM > > To: Keller, Jacob E <jacob.e.kel...@intel.com> > > Cc: Timo Korthals <tkorth...@cit-ec.uni-bielefeld.de>; linuxptp- > > us...@lists.sourceforge.net > > Subject: Re: [Linuxptp-users] How to properly use twoStepFlag=0 > > > > On Fri, Jan 11, 2019 at 11:09:32PM +0000, Keller, Jacob E wrote: > > > > The two other chips supporting ONESTEP_SYNC are the TI dp83640 and the > > > > Microchip LAN7430/1. > > > > However, I only found chip samples but no buyable networkcards having > > > > these chips. > > > > Does someone know network cards with these chips or at least other > > > > network cards with HWTSTAMP_TX_ONESTEP_SYNC support? > > > > > > Unfortunately I'm not aware of any that does. :( I thought maybe i210 > > > hardware > had > > support, but no one has ever implemented it in the device driver... > > > > The i210 does *not* support one-step, but IIRC there is some > > misleading text that suggests this. > > > > The data sheet indicates that it does. I haven't tried it myself, so I can't > confirm if or > why the data sheet is wrong. > > > To my knowledge there is no off-the-shelf one-step card on the market. > > > > Sorry, > > Richard > > Yep, that's as much as I know currently as well. > > Thanks, > Jake >
Yea, I read the datasheet section, and it appears that the 1-step insertion doesn't update the UDP checksum, so it would definitely not work for the normal UDP frame PTP, (as checksums will be invalid). Thanks, Jake _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
