After upgrading firmware in stm32f407vgt through pendrive fatfs of upgraded code is not working, controller hangs on f_mount, please help...............

[VKUMA.12]

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[Ozone]

We are supposed to speak magic workd into crystal balls ? A bit more information would be helpful.

Have you validated the updat eprocess itself and the new firmware version (update) independently ?

[VKUMA.12]

thanks for reply......

am upgrading firmware in microcontroller using a usb pendrive, any other program other than usb works fine.

there are two program running on the controller, first is firmware upgrade program and another is the program we want to upload in microcontroller using usb

pendrive. From reference manual AN3990

[Ozone]

Not easy to comrehend what you mean.

>... first is firmware upgrade program ...

A bootloader, to check for updates, and perform them if necessary ?

>... and another is the program we want to upload in microcontroller ...

The application supposed to run normally ?

Have you tried to debug your code ?

Where does it get stuck, or faults ?

> ... hangs on f_mount ...

Did you check why f_mount fails, down to the peripheral driver level ?