AN12149 IEEE 1588 sync not working well

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AN12149 IEEE 1588 sync not working well

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ypearson-bdai
Contributor I

Hello

Board: MIMXRT1020-EVK (2 boards connected by patch ethernet cable)

Software: AN12149SW

1 configurated at Master

1 configured as Slave

Oscilloscope connected to J19-10 to observe PPS signal

Issue: PPS pulse will on occasion be ~50ns between master/slave device but after some time will lose sync and be off by ~500us and never recover. Resetting the board may temporarily fix the issue but drift /error will eventually come back.

 

I would like to see if there is a fix to maintain sync between master and slave device

 

 

 

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daweiyou
NXP Employee
NXP Employee

Try to modify DEFAULT_PDELAYREQ_INTERVAL, DEFAULT_SYNC_INTERVAL, AP, AI

 

daweiyou_0-1708480404937.png

 

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