I am working with STM32F407 to write a text file to Pendrive (USB Host). But i am getting FD_DISC_ERR. When I debugged more i understood that this is due to HOST_DEV_WAIT_FOR_ATTACHMENT issue. Can anyone help why this is happening?

[Ajithkumar]

These are the pinout and clock config diagram

I am working with STM32F407 to write a text file to Pen drive (USB Host).

f_open(&MyFile, "testfile.txt", FA_CREATE_ALWAYS | FA_WRITE);

getting FD_DISC_ERR. When I debugged more i understood that this is due to HOST_DEV_WAIT_FOR_ATTACHMENT issue. Can anyone help why this is happening?

 

[Imen.D]

Hello @Ajithkumar​ and welcome to the Community :)

Try ClockDiv with 2 or 4.

I advise you to get inspired from the available examples available with STM32CubeF4 MCU package, and you will find more details on this article: Introduction to USB with STM32.

Make sure to use latest versions of STM32CubeMX and STM32CubeF4 MCU package.

Imen

[Ajithkumar]

Not worked. I tried with multiple clock vales.

I tried with example project in CudeIDE as well as i created new project from scratch but not worked me both.

Is any Size limitation for Flash Drive size ?

I mean I tried with 16GB and 32GB Flash Drive