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STM32F103 FW standalone upgrade is possible?

woutnme
Associate II

‎2023-04-27 10:34 PM

Hi guys, some body make it a standalone upgrade for this small MCU ¿?

This MCU can use the native USB in OTG FS mode with a correct bootloader i think can do it, if somebody with more experience can clarify this please.

Thanks

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Peter BENSCH
ST Employee

‎2023-04-28 12:03 AM

The internal bootloader in the STM32F103 can only be controlled via UART.

If you want to realize a firmware upgrade via the USB port, you would have to store your own bootloader in the user flash, which of course reduces the flash available for the application.

Alternatively you can switch to a pin compatible STM32F105 or STM32F107 because their bootloader is also accessible via USB.

Hope that helps?

Regards

/Peter

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