3 Replies Latest reply on Dec 25, 2011 11:01 AM by userc_39320

    copy fifo buffer



      i have a problem


      I'm trying to implement a loop back similar to exemple bulkscr but i want not to use the autopointer for copy endpoint out to enpoint in (for read my write). I would like access to ram by make the copy directly.


      I tried to use the command


       for (i=0;i<512;i++)
          EP6FIFOBUF[i] =EP2FIFOBUF[i];    // EP2 OUT and EP6 input


      but doesn't work


      is the assigment correct for fifo ram buffer?




      thanks a lot

        • 1. Re: copy fifo buffer

           Hi Aasi




          I put my questtion in another way.....


          If i send data to EP6 output endpoint from host, if i call by firmware EP6FIFOBUF[i] do i have in this array the data sended by host?


          please help me





          • 2. Re: copy fifo buffer



                   Yes, you can access the fifo contents by firmware but FIFOshould be configured for Manual mode. For more details on manual and automode please look into section 9.3.4 Auto-In / Auto-Out Modes of TRM-page 111. You can configure FIFO modes using EPxFIFOCFG register.

            • 3. Re: copy fifo buffer

              Hi PRJI


              Excuseme, I'm in holiday i could not answer


              Thanks for your answer, i will try your tip next week. I'll keep you informed.


              I leaved EPXFIFOCFG by default so i will try to change it.


              Mybe the problem can be also that i leave enabled the autopointer.....


              I will Try