support for stm32f446

[Strange21]

Added support for stm32f446 board, with bootloader and bootfirmware and update firmware.

[Strange21]

Added working video of the board

https://user-images.githubusercontent.com/93325790/171675363-9a46c319-550d-4c08-978f-17bc8c827c60.mp4

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[Strange21]

• ci.yml

  • the if statement at line 83 needs to be fixed. Have a look at the ci-workflows for the other boards.
  • --> Fixed the if statemen similarly to the existing stm board

• boards/bootloaders/stm32f446/readme.md

  • this should be renamed to debug.md
  • --> file renamed

• boards/update/Cargo.toml and rustBoot/Cargo.toml

  • remove the additional default feature defmt. I believe you only needed this for testing -right?
  • --> Yes I have added it for testing purpose only, Removed now.

• boards/update/src/update/update_flash.rs

  • contains commented out defmt print statements, remove them.
  • --> Removed the print statements.

• xtask/src/main.rs

  • remove the extra print statement from line 84.
  • --> Removed the print statement.

• rustBoot/src/image/image.rs

  • again extra use statement at line 6
  • --> Removed

  Justification

  • Why are we using the stm32f446_boot_fw and stm32f446_updt_fw as names for the blinky firmware?
  • Because we want to have unique names for each firmware. If we had same name of the firmware it was causing the error of dependency. Also followed the existing naming convention from nrf board firmware.
  • rustBoot/src/dt/fit.rs
  • why was line 222 changed here?
  • --> This statement was causing the error --> value after borrowing. Because on line 219 config value was passed to configuration, and later it was used in print statement. which was causing he error of value borrowed after use. Therefore I tried to fix it.

[nihalpasham]

looks good and ready for merging.

[nihalpasham]

🎉🎉🎉🎉🎉🎉🎉