Hi, We have implemented USB bootloader for our project(Using STM32F7). We are using ST HAL libraries for our bootloader implementation. It was working fine fine with V1.2.7 and we are facing issue after migrating to new HAL i.eV1.2.8.

[MRama.3]

After completion of below checks, control is expected to enter into usbAppcallback function with via HAL_HCD_IRQHandler(). Interrupt is occuring but it is failing to enter usbAPPcallback function which changes the device state.

 

[MRama.3]

sorry...here is the usbAppCallback function snapshot.