STM32Cube USB host library

[che.8]

Hello:

I am currently develop on stm32f4/f7 series use USB Host to connect with usb cameras. I found in the STM32Cube USB host library application examples, they all use the USB host with

USB DMA disable, then I turn on the USB DMA option in my USB camera application, I always found the camera data receive transfer terminated without any USB transfer error in the usb interrupt, but indeed the data transfer is ended. But when use with the USB DMA disable, It can tranfer the data continously and succesfully.So I wondered what's the problem with the USB peripheral

[che.8]

And by the way I disabled the stm32f7's cache, and can enumrate the usb camera device correctly in my application code.