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Hello ! Is there some TI resource describing the throughput of EDMA transfers ? It would be great if there is a definitive way to choose between two types of transfers, to get the same effect. For e.g. when I tried a 2D to 1D transfer to move two columns of 16- bit data, it took more than 2.5 times as long as when I tried to same transfer as a 1D - 1D tranfer of a column of 32 bit data. (using 6711 DSK) I would really appreciate any pointers, advice on this issue. Thank you in advance ka |
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EDMA throughput
Started by ●May 14, 2002
Reply by ●May 15, 20022002-05-15
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Hi You wrote : > For e.g. when I tried a 2D to 1D transfer to move two columns of 16- > bit data, it took more than 2.5 times as long as when I tried to same > transfer as a 1D - 1D tranfer of a column of 32 bit data. > (using 6711 DSK) I would say thaht the x2 factor comes from 16-bits / 32-bits change. When you program your transfer as 16-bits words, the DMA will do twice the number of memory access. Jean-Michel MERCIER ------------------- dsp & imaging - www.ateme.com ATEME - 26 Burospace - 91573 BIEVRES Tel : +33 (0)1 69 35 89 73 (direct) Fax : +33 (0)1 60 19 13 95 |
