STM32F469II USB

igor2 · ‎2016-09-14

Posted on September 14, 2016 at 21:57

Hi

I am attempting to develop application on STM32F469II that utilizes USB CDC.

On our HW board, i am able to run STM CubeMX CDC Standalone example.

But we are using Keil toolchain, and when running Keil based example - i am not even geting USB RESET (

USBRST

). I have exactly the same clock configuration (copied SystemClockUpdate) function from Cube to Keil...

What can be a reason for such a behavior where even USBRST is not happening?

We are using FS mode of USB and CDC Device configuration

Keil driver for USB is 6.8.0

Appreciate any help...

Igor

Walid FTITI_O · ‎2016-09-16

Posted on September 16, 2016 at 10:07

Hi igor.igor.002,

Is there any warning or error message ? (the USB wouldn't enumerate then ?)

Have you checked the USBRST bit in the OTG_FS_GINTSTS register ?

As a test for your hardware, try to run a ready to use example in the STM32Cube and see if it works .

-Hannibal-