Showing results for 
Search instead for 
Did you mean: 

STM32F105 USB Device not detected on PC

Associate II

I have generated USB CDC code using STM32CubeMX with firmware 1.7.0. When I run the code, nothing is detected on the PC. I have disabled VBUS sensing and made sure USB peripheral Clock is enabled. I am using external 25MHz crystal and verified by PLL settings with the examples provided. When the board is not connected to PC, I continuously receive Reset interrupts but when I connect the cable, the interrupts are no longer hit. Please help