• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 101 subscribers
  • Views 302 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

AM335x data lost if enable UART1 EDMA

yu zheng
Intellectual 495 points

hello,

    we are using uart1 to receive and send data,at baud:921600. and i am using ti-sdk-am335x-evm-06.00.00.00-Linux-x86-Install

    but we found that the uart missed some characters when receive the data by 921600 bps if we enable the UART DMA. but it's ok if i use the UART polling mode.

there are some overrun on UART if we enable the UART EDMA, i don't know where is wrong?

we want to use UART DMA to reduce the CPU loading and improve the performance; and there are continuous data which need receive on AM335X side by UART.

    now the question is:

    1 how can i enable UART DMA mode?

     2 Is there known issue on UART DMA mode?

      3 is there a user guide or examples to enable UART DMA?

Thanks a lot!