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CCS/AM3354: Loss of CPTS time stamps

Krasnov Vitalii
Prodigy 190 points
Part Number: AM3354

Tool/software: Code Composer Studio

Hello.

Based on AM3354, we are developing a PTP device that is a SLAVE device. As the operating system we use TI RTOS. We use the CPTS module as a timestamp source. At the moment, we can synchronize our device from the MASTER clock, however, with minimal traffic on the network.
When the traffic transmitted from our device increases, the CPTS module stops receiving timestamps of transmitted PTP. (That is, we do not see timestamps in the CPTS hardware queue). Can you tell me in which direction to move in order to identify the reason why the tags in the CPTS module disappear.

Yours faithfully,
Vitaliy.

  • 0
    Prodigy 190 points

    Hello everybody.

    After studying TRM and conducting experiments, we realized that the lack of timestamps in the CPTS was due to the lack of TX descriptors. Increasing the number of descriptors solved this problem. Maybe this will help.

    Yours faithfully,
    Vitaliy.