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Original question:

PROCESSOR-SDK-J721S2: questions about gPTP (SDK 8.5)

PROCESSOR-SDK-J721S2: rtos sdk 8.5

xin lei
Prodigy 215 points
Part Number: PROCESSOR-SDK-J721S2


Hi ti

    I have a question on psil. Could you please tell what is psil used for? I think dma is used for data transfer, but psil is used for data transfer too in j721s2 system. Could not we just use dma?

    Take cpsw for example, I think, udma-p in the navss can transfor data from memory of ddr to memory of cpsw, why we should use psil to transfer data again? this question is the same for other links, thanks!

  • 0
    TI__Guru**** 479755 points

    Hi,

    The PSILSS is a PSI-L compliant hardware switch that makes the connection between PSI-L master and slave endpoints. This interface is used at many places within the SoC. Most of the driver takes care of configuring this switch and connecting master to slave device. So application does not need to take care of this.

    Please refer to section 10.2.9 in TRM for more information on this module. 

    Regards,

    Brijesh