Re: [linux-usb-devel] Clock synchronisation using the frame counter

2007-03-03 Thread Alan Stern
On Sat, 3 Mar 2007, Laurent Pinchart wrote: > Hi everybody, > > I'm trying to find a way to synchronise the Linux system clock with a device > clock using the USB frame counter as a shared clock. ... > I end up with three time sources: the device clock, the USB clock (through > the > SOF count

Re: [linux-usb-devel] Clock synchronisation using the frame counter

2007-03-03 Thread Thomas Sailer
On Sat, 2007-03-03 at 11:44 +0100, Laurent Pinchart wrote: > I'm trying to find a way to synchronise the Linux system clock with a device > clock using the USB frame counter as a shared clock. In a related scenario I have an USB device that periodically sends its device clock over USB and I want

[linux-usb-devel] Clock synchronisation using the frame counter

2007-03-03 Thread Laurent Pinchart
Hi everybody, I'm trying to find a way to synchronise the Linux system clock with a device clock using the USB frame counter as a shared clock. My USB device has an internal clock, called the device clock. Its frequency is reported in the USB descriptors. When streaming data (video), every vide