Most, if not all, devices in the STM32 family support flashing via a serial connection. Flashing over serial is also suported by the texane/stlink tool.

Flashing over serial works by starting the device in its bootloader mode and connecting it to a PC via an USB to serial converter. For the Blue Pill, connect converter TxD to board RxD (PA10) and connect converter RxD to board TxD (PA9).

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You need adc conversion and you seem to have implemented it by using the stm32f30x crate. But I think having all that abstracted in the stm32f30x-hal crate would be really helpful.

It would be nice if someone implemented those adc traits in the hal crate.

I'm currently trying to figure out how to do adc on the stm32f303 myself, when I figure it out, I will try to contribute to the hal crate.

Add a programming guide to the docs.

Contents:

• Explain how the Blink example in the templates works
• Introduce the CMSIS
• Explain how to use the official docs (datasheets, references, programming manuals, etc...)