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CCS/DK-TM4C129X: Need example for use of EMAC timestamp unit

Leo Bredehoft58
Expert 1260 points

Part Number: DK-TM4C129X

Tool/software: Code Composer Studio

I would like to turn on the EMAC timestamp counters, to get them to free-run, at least initially.  After that, I would like to implement PTPv2 on top of the NDK API.  There appears to be an implementation of PTPv1 in the third_party directory for TivaWare for lwip, but not much more than that.  I would assume that part of TI's design verification would include code to run PTPv2.  Does that code exist somewhere?  What is the setup to just get the timestamp counters to free-run?  Thanks in advance for your help.