STM32F4 SPL USB library example CDC/VPC: how to determine if PC serial port is open?
I managed to get an old version of the USB CDC/VCP SPl library working https://www.st.com/en/embedded-software/stsw-stm32046.html and modified the VCP example to send/receive data to a PC via USB serial port. I edited syscalls.c so that the printf() ...