How do you debug it? You may want to add some print messages to the firmware and see what exactly is happening?
Function CyU3PDmaMultiChannelCommitBuffer returns CY_U3P_ERROR_INVALID_SEQUENCE and translation terminated. What this mean I don't understand because there aren't any description in technical documentations. Also device don't detects by Cypress CC, but in system device manager it is present.
When I use the small bufer device don't returns any errors.
I solved the problem with transfer data. But now there is another problem with the low data transfer speed. If I've transfer less then 10MB/s there are all ok, and packets havn't lost. But when I have increased data trasfer speed to 50MB/s many packets become lost.
I when I try to test the speed with USBBulkSourceSink example it was up to 380MB/s. But when I use data from videosensor to transfer in this exapmple it transefr with loses. What may be cause of this lases.
Try using the maximum dma buffer that is available.