I was using the BF - 527
using the USB port.
How to setting DMA FLOW control?
The USB DMA can be set up in DMA Mode 0 or Mode 1 in the USB_DMAxCONTROL register. Mode 0 would be used to load/unload one packet and the processor intervention is required for every packet transferred over the USB. On the other hand Mode 1 can be used to load/unload a bulk transfer(multiple packets). Please see the HRM for more details.
Retrieving data ...