Firmware configuration file #4404

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1. bitboy85

   added

   enhancement

   on Mar 14, 2021
2. deshipu commented on Mar 14, 2021

   

   deshipu

   on Mar 14, 2021

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   Maybe it would be best to keep this information in the bootloader? https://github.com/Microsoft/uf2/blob/master/cf2.md
3. jepler commented on Mar 15, 2021

   

   jepler

   on Mar 15, 2021

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   See also #1015 about making USB descriptors configurable. I think we favored the idea of doing it in Python code from boot.py over having a "configuration file" in another language.

   Note that the filesystem label is set just once when the storage is initially formatted (or re-formatted via storage.erase_filesystem()) rather than each time the device is plugged in.
4. jepler

   added this to the Long term milestone on Mar 15, 2021
5. tannewt commented on Mar 16, 2021

   

   tannewt

   on Mar 16, 2021

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   Why do you want this? boot.py is meant to store settings too.
6. bitboy85 commented on Mar 16, 2021

   

   bitboy85

   on Mar 16, 2021

   Author

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   If it is possible to edit those settings within boot.py i'm fine with it. I thought, the configuration needs to be available at the time circuit python is installed/updated.
   The idea behind the bot-sel storge was that this configuration cannot be accidentally deleted and it would be easier to deploy because you just need to copy the configuration an the firmwarefile to the same directory.
7. tannewt commented on Mar 16, 2021

   

   tannewt

   on Mar 16, 2021

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   The UF2 file is copied to a fake drive so no other files can be copied with it. boot.py runs before USB starts, so it can change what the USB device is configured as.
8. s-ol commented on Apr 5, 2022

   

   s-ol

   on Apr 5, 2022

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   Configuring this in boot.py definitely makes sense. As far as I can tell, what is missing is just a python API for setting/overriding USB_VID, USB_PID, USB_PRODUCT, USB_MANUFACTURER; probably in the supervisor module.

   It's interesting that usb_build_device_descriptor already has parameters for setting USB_VID and USB_PID at runtime, but it is only ever called once (and with static arguments).

   These values could be non-const variables that can be updated (in RAM only) with something like e.g.:

   import supervisor
   supervisor.set_usb_device_descriptor(
     vid: Optional[int] = 0xdead,
     pid: Optional[int] = 0xbeef,
     manufacturer: Optional[str] = "ACME Inc.",
     product: Optional[str] = "Foobar",
   )
   
9. dhalbert

   closed this as completedin #6247on Sep 21, 2022