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Ext. Port DMA Circular mode

Question asked by mich1985 on Mar 16, 2017
Latest reply on Jun 27, 2017 by Jithul_Janardhanan

Hello all,

currently I'm using the external port DMA in circular mode on a ADSP-21469 to add new samples to my input buffer. In the second step I'm using multiple gather TCBs to access the elements in the previsouly mentioned input buffer (with various offsets/delays). The configuration works as expected but I have to refresh the EIEP address of the gather TCBs every time before starting the DMA transfer. So my question is - is there a more elegant way to utilize the DMA for single write / multiple read without refreshing the EIEP values manually?


Best regards,