Vladimir Alemasov

Why do you automatically [double the buffer for the isochronous endpoint](https://github.com/dmitrystu/libusb_stm32/blob/master/src/usbd_stm32f429_otgfs.c#L237)? It seems to me that a separate USB_EPTYPE_DBLBUF option for an isochronous endpoint would be appropriate.

Thanks for the clarification.

I had the problem you described with an STM32-MINI board with the original STM32F103CBT6 chip. Your solution worked great. Thank you.