• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 31 subscribers
  • Views 298 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TM4C1294NCPDT: uDMA with UART get current buffer index(buffer pointer)

dwas dwasw
Prodigy 100 points
Part Number: TM4C1294NCPDT


I'm using udma with uart and it works well.

Is there function return data's index that is lastly added to rx buffer by dma?

  • 0
    TI__Guru**** 191906 points

    Hi,

      There is no such function. The uDMA will notify the processor using interrupt to signal the completion of the transfer. The user application should know the destination buffer address and size of the buffer where the uDMA transfers the data to. You want to process these data before the next transfer starts which may overwrite the unprocessed data. Use the uDMA Ping-Pong mode should greatly help in this regard.