I have a STM32L152RE Nucleo-64. I would like to send data through the USB port, but I always get the following error: USB Device not recognized.
I have been trying to solve this problem for more than two weeks. I have two Nucleo-64 cards and get the same error.I have configured everything using the STM32CUBEMX, I have configured the clock, following several tutorials, but it is impossible for...