Solved
how to enable host USB interrupt stm32f4 thanks
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Tesla DeLoreanBest answer
Guru
January 2, 2019
/* Set USBFS Interrupt to the lowest priority */
HAL_NVIC_SetPriority(OTG_FS_IRQn, 5, 0);
/* Enable USBFS Interrupt */
HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
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