Solved
how to enable host USB interrupt stm32f4 thanks
..
..
/* Set USBFS Interrupt to the lowest priority */
HAL_NVIC_SetPriority(OTG_FS_IRQn, 5, 0);
/* Enable USBFS Interrupt */
HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.