NUCLEO-L4R5 CubeMX generated USB CDC cannot be recognized solution

littleshrimp

NUCLEO-L4R5 CubeMX generated USB CDC cannot be recognized solution [Copy link]

This is the worst one. I think I have been cheated more than once.

NUCLEO-L4R5 or other NUCLEO-L4R5 boards should not have high-speed crystal oscillator X2 soldered

However, in projects created using STM32CubeMX, HSE is used as the clock source by default.

This USB cannot recognize the hardware after countless attempts. I have tried all possible solutions, but I didn't expect this to be the reason.

When using HSE, SystemCoreClock shows a main frequency of 4MHz

The problem is solved after changing PLL Source Mux to another clock source.

兰博

Thanks for sharing, EE guys can avoid pitfalls in the future

littleshrimp

Rambo posted on 2020-3-16 14:42 Thanks for sharing, so that EE brothers can avoid pitfalls in the future

Best, I wasted my whole morning!!