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Discussion Groups | TMS320C6x | what does mean that chaining EDMA?

Technical discussions about the TI C6000 DSPs (including the c62x, c64x and c67x DSPs).

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what does mean that chaining EDMA? - chunrang - Aug 21 2:51:00 2003

i am starter of dsp 6711. i am reading the peripharal user guid. in the EDMA part(6.15), i can't undertan chaining EDMA. what does mean that? ,what application is it used?

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Re: what does mean that chaining EDMA? - Mike Dunn - Aug 21 3:31:00 2003

Refer to spru234 [july 2003] -available at ti.com

TMS320C6000 DSP Enhanced Direct Memory Access (EDMA) Controller Reference Guide

EDMA chaining and linking are two very powerful features. Use EDMA chaining to cause a "chain reaction" from a single event. For example, when a single interrupt occurs, you may want to perform a DMA xfer one one channel from an I/O device and chain that xfer to another channel that will copy a processed buffer from internal memory to external memory.

Also, a note to all EDMA users. The DSP cache has no knowledge of EDMA xfers - they can create cache coherency problems!! The programmer must manage these [TI has at least one app note on this].

mikedunn

chunrang <c...@yahoo.co.kr> wrote:

i am starter of dsp 6711. i am reading the peripharal user guid.

in the EDMA part(6.15), i can't undertan chaining EDMA.

what does mean that? ,what application is it used?

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