STM32 F7 USB host is failing to detect USB drive with new STM32 HAL library(V.1.2.8)

[MRama.3]

We are implementing USB Bootloader for our project. MCU is STM32F779NI and we are using ST HAL libraries for our implementation. After completion of checks, control suppose to enter into callback function via HAL_HCD_IRQHandler().

Device state changes in our usbAppCallback() function and with new HAL it is not entering into callback function. .We have not observed this issue with HAL library V.1.2.7.I have attached the snapshots of our code.

Please help me to resolve this.

[MRama.3]

here is the code for callback function.

[MRama.3 · Accepted solution]

Solved the issue with new HAL...