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TM4C1294NCPDT: USB DMA Controller with endpoint 0

KF Yang
Prodigy 25 points
Part Number: TM4C1294NCPDT

Hello,

I use USB HID device mode. Does it possible to use USB DMA in endpoint 0?

  • 0
    TI__Guru**** 191206 points

    Hi KF,

     Reading the USB user's guide, it looks like only EP1-7 can be assigned to DMA. 

    26.6.6 USB DMA Controller
    The USB includes an integrated eight-channel USB DMA controller for efficient loading/unloading
    of the endpoint FIFOs. Any Tx Endpoints 1 through 7 and Rx Endpoints 1 through 7 can be assigned
    to DMA channels 0 through 7. An endpoint and its direction can be assigned to a USB DMA channel
    through the EP field and DIR bit in the USB DMA Control n (USBDMACTLn) register. The DMA
    can operate in two modes and can handle packet sizes up to 8K. In addition, the DMA controller
    can be programmed to conduct transfers using burst of four, eight and sixteen or bursts of unspecified
    length.

  • 0 in reply to Charles Tsai
    Prodigy 25 points

    Hi Charles,

    Thanks for your reply.

    May you provide that where could get the USB user's guide?

  • +1 in reply to KF Yang
    TI__Guru**** 191206 points

    Hi KF,

      The full user's guide is under NDA. Once you have the NDA, I will release to you privately.