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TMDSEVM437X: CPSW RX DMA Descriptor Owner and SOP Flags

Part Number: TMDSEVM437X


We are working on Ethernet Driver on TMDSEVM437X board using proprietary RTOS. Driver works well in Interrupt mode. But it is observed that if Interrupts are disabled and we POLL the DMA RX Descriptor OWNER flag (indicates that packet has been completely received), it takes times (in units of seconds) to be clear. Same is the case for SOP flag to be set. Is this expected behavior? What is the optimal time for these flags to be set/clear in the absence of interrupts.

  • Hello,

    My recommendation would be to look at either our Linux offering or our TI RTOS/NDK offering and see if you see a similar behavior there. These are the validated software offerings that have been tested to work well. 

    Thank you.