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PE DMA Circular buffer issue

Question asked by kiran kunnath on Aug 4, 2014



We are trying to use Processor Expert code for DMA using circular buffer in Nested Transfer mode for DAC.

DAC FIFO is the destination buffer and the source buffer is the 32Kbytes circular buffer.

In DMA_Controller_LDD settings, when circular buffer of(32Kbytes) is enabled with Nested transfer mode

almost last 1Kbytes are not being taken from the circular buffer. When 2Kbytes of circular buffer is

assigned instead of 32Kbytes, the signal obtained is as expected.

Is there any settings we need to do separately to enable 32 Kbytes circular buffer.

Attached PE generated code for the reference.

Kindly let me know if  there is any issue.




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