nucleo-144stm32f429 usb otg fs

[yang hong]

Posted on June 06, 2018 at 21:58

Hello, 

I check stm32cube-fw-f4-v1.21 library for nucleo-144stm32f429zi, I can't find a sample for usb-otg-fs, does anybody be able to provide a sample?

also when I try to configure nucleo-144stm32f429zi in stm32cube, I found when sys freq sets to 180Hz and enable usb-otg-fs Q frequency can't be 48Hz. Does anybody knows how to fixed?

[Tesla DeLorean]

Posted on June 06, 2018 at 22:24

You'll need to pick a max speed that permits a 48 MHz USB clock, use an external phy, or pick a more current part supporting alternate CLK48 sources (say like a F446 ?)

There are F7 and L4 parts that also address this via multiple PLL and MSI/HSI48 sources.

If this is non-commercial tooling around, the F429 will probably clock at 192 MHz, which could get you a 48 MHz Q clock.

For examples, find something architecturally close, and port it over

STM32Cube_FW_F4_V1.21.0\Projects\STM324x9I_EVAL\Applications\USB_Device