STM32 USB C to UART communication

PPopo.1 · ‎2024-02-09

Hello, I am making a development board where I want to use STM32 and USB C connector for power supply to the STM and also for UART communication with the PC. What are the best solutions for this? I looked into using FTDI chip but they are quite expensive. Also, not really sure how to connect the USB C connector for this to work. I am using STM32G0B0CE which has a USB NOE pin which im also not sure how it works or where to connect it.

Any help or referrals will be welcome

gbm · ‎2024-02-09

Many STM32 MCUs, including STM32G0Bx, have USB interface onboard, so just use it. I suggest CDC (=VCOM, =UART emulation) as a starting point.

My STM32 stuff on github - compact USB device stack and more: https://github.com/gbm-ii/gbmUSBdevice

Pavel A. · ‎2024-02-09

If the UART communication with the PC is only for development, not part of the planned product function - use an external USB to serial chip. There are many of them, much cheaper than FTDI. OTOH the FTDI converter has features not available in cheaper converter.