IEEE1588 application in i.MX6SoloX processor

linzhou · ‎10-08-2018

Hi,

Our project uses the i.MX6SoloX processor. In the IEEE1588 application, I didn't find more references in the datasheet and reference manual.I have the following questions that need your support.:
1. I understand IEEE1588, there should be similar pins such as 1588_CLK_IN, 1588_PULSE_OUT, but I have not found similar pins in the i.MX6SoloX processor. The pins related to IEEE1588 are only ENETn_1588_EVENTn_IN and ENETn_1588_EVENTn_OUT. How to connect these pins correctly?
2. Do I need to add an external high precision reference clock source separately? Is it possible to pass the ENETn_1588_EVENTn_IN pin if needed?
3.Is the 1 PPS signal output directly through the ENETn_1588_EVENTn_OUT pin?

Thanks very much for your reply!

Yuri · ‎10-14-2018

Hello,

Section 24.6.10.5 (Input Capture and Output Compare) of the i.MX 6SoloX

Reference Manual, Rev. 3, 07/2018, describes the Capture Compare block,

which can be used to provide precise hardware timing for input and output events.

Please look at my comments below regarding Your questions.

1.

The ENET events signals may be used to capture/compare input/output event signals.

2.

No need to use an external high precision reference clock. ENETn_1588_EVENTn_IN signals may be left unused.

3.

Correct, the 1 PPS signal can be output directly through the ENETn_1588_EVENTn_OUT pin.

Also, please refer to section "ENET IEEE-1588" in i.MX Linux Reference Manual:

https://www.nxp.com/webapp/Download?colCode=L4.9.88_2.0.0_LINUX_DOCS&Parent_nodeId=13376994810717061...

Note : to activate PPS on master the phc2sys should be run with ptp4l.

https://events.static.linuxfound.org/sites/events/files/slides/lcjp14_ichikawa_0.pdf

Have a great day,

Yuri

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Yuri · ‎10-14-2018