LayerscapeのトピックRe: Time Synchronization using GPS (LS1046/LS1088)

Time Synchronization using GPS (LS1046/LS1088)

muhammed_mufeed — Tue, 31 Mar 2020 10:27:05 GMT

Hi,
I know how to synchronize time using IEEE1588 (PTP). How can I Synchronize Internal clock of LS1046/LS1088 with GPS time. As per my knowledge for synchronizing a system with GPS we need ToD information and 1PPS signal from GPS receiver. I can connect GPS via UART to LS1046/LS1088. But where I connect 1PPS signal?

Re: Time Synchronization using GPS (LS1046/LS1088)

ufedor — Tue, 31 Mar 2020 17:58:03 GMT

The 1 PPS signal has to be connected to the TMR_TRIG1 input.

Re: Time Synchronization using GPS (LS1046/LS1088)

muhammed_mufeed — Thu, 02 Apr 2020 11:00:07 GMT

Hi Ufedor,

Can I phase align my 1588 nominal clock with this 1PPS input connected to the TMR_TRIG1 input.

Re: Time Synchronization using GPS (LS1046/LS1088)

ufedor — Thu, 02 Apr 2020 11:07:42 GMT

Not clear what do you mean and why it can be needed.

Re: Time Synchronization using GPS (LS1046/LS1088)

muhammed_mufeed — Tue, 28 Apr 2020 11:47:30 GMT

Hi Fedor,

To implement PTP master. A PTP master contains a gps receiver to get UTC time. GPS receiver will provide ToD information and 1PPS signal to synchronize PTP master with UTC.

Re: Time Synchronization using GPS (LS1046/LS1088)

kien_tran — Tue, 16 Jun 2020 22:03:13 GMT

Hi ufedor‌

Once a 1 PPS is connected to the TMR_TRIG1 input, does the times tamping engine automatically adjust it's time to the 1 PPS?

-Kien

Re: Time Synchronization using GPS (LS1046/LS1088)

hmz-rhl — Tue, 18 Apr 2023 09:25:57 GMT

is it the same for LS1043 ? and what did you mean by "connect" pls