I created a custom board with an STM32F103C8T6 microprocessor and Iwant to use the USB to program the board using the STM32CubeProgrammer. I found out thanks to a user on Stack Exchange that it is not possible to make it work for the STM32F103 without a DFU or bootloader (see datasheet).
I tried different ways to make it work, see the following points:
- Using the STMFlashLoader and a bootloader from GitHub (always recommended by YouTube videos, the boot loader by Rodger Clark)
- Using the STM42CubeProgrammer and the same bootloader.
For more ways, see Programming STM32F103c using USB.
I always get to the point, where I can upload a program using the STM32CubeProgrammer over the USART1 connector. After setting the Boot0 pin back to 0 and reseting the board, and then connecting the board back using the power/COM port, the device gets recognised but as an UNKNOWN DEVICE.
I also tried to enable the USB. That works a little. When the program got flashed via USART1 (like described above) and reconnected, the COM-Port is listed under the COM-Ports (in windows 11 > Device Manager).
Where I am now?
Currently I try and fail, and not really getting anywhere.
What the problem could be:
- Wrong bootloader
Should use the right one! Have the PC13 as an LED output (like the boot loader)
- Wrong schematic connection
- Wrong way to use the CubeProgrammer and the uploader (did it like in the tutorials)
Maybe somebody encountered the same or a similar problem and can help me fix this.
See my other questions on this topic for additions: