Re: aic23 on 5510dsk by dma
- From: Brad Griffis <bradgriffis@xxxxxxxxxxx>
- Date: Thu, 28 Aug 2008 23:57:19 -0500
ahmadagha23 wrote:
hi
Do you know why in dma setting of "dsp_app1" the source address of receive
is 0x6002 and the destination address of transmit channel is 0x6006? they
are not the addresses for DXR or DRR, aren't they?
I am waiting for your reply.
When doing data accesses with the CPU everything is seen as a 16-bit word address.
CPU Perspective
&McBSP2_DRR1 = 0x3001
&McBSP2_DXR1 = 0x3003
The DMA on the other hand sees all of the memory with byte addresses. Hence those same registers have a different address as "seen" by the DMA.
DMA Perspective
&McBSP2_DRR1 = 0x6002
&McBSP2_DXR1 = 0x6006
Hope that clarifies.
Brad
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