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UF2 file format specification
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Ambiguity in uf2families.json for STM32F4 processors #64

Closed NathanY3G closed 2 years ago

NathanY3G commented 2 years ago

The uf2families.json file contains multiple IDs relating to STM32F4 processors - 1 for the entire series and 2 relating to the STM32F407 product line within that series. However, the description for the entire series is ST STM32F401 which I believe is incorrect! This appears to have caused some confusion in two related open source projects where different IDs have been used for the STM32F405. I would like to propose changing the description to try and improve the situation.

   {
        "id": "0x57755a57",
        "short_name": "STM32F4",
        "description": "ST STM32F4xx"
    },

For reference: https://www.st.com/content/ccc/fragment/product_related/series_information/series_level_diagram/group0/6e/ab/f8/ba/9c/9a/4d/37/obn_stm32f4_series_ss1577/files/obn_stm32f4_series_ss1577.jpg/jcr:content/translations/en.obn_stm32f4_series_ss1577.jpg

mmoskal commented 2 years ago

Thank you, I guess this description is better.

The problem is the usage here really depends on how you build your binary. It could be that the same binary works on all STM32F4 boards, or it could be that it only works on say STM32401RE with a particular pinout.

Bootloaders are free to accept any number of IDs though!

NathanY3G commented 2 years ago

Thank you @mmoskal for both the tweak and more information about UF2. It is appreciated!