7. M2m_repeat_mode

7.1. Function description:

This demo shows memory to memory data transfer working in repeat mode.

The source and destination address is increasing automatically, but the start address is fixed in every transmission:

Enable global interrupt & register UDMA interrupt.
Enable full transfer interrupt.
Initialize & configure the udma.
Set transfer repeat times equal to 4 and address substraction value for next transmission, then start dma data transfer.
Counter the number of transmission when trigger and enter interrupt service routine.
Compare the data in destination address with the data in source address after finish 4 times transmission.

Mode	Buffer size	Des address mode	Src address mode	Src width	Des width	Channel	saum	rsau	daum	rdau
repeat	64 bytes	increasing	increasing	32 bits	8 bits	CH0	SUB	64	SUB	64

If the data writted to buffer by DMA is same as the source data, then print pass, if not print fail.

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