- Add // comments above top-level use imports in uart.rs, blink.rs, button.rs
- Add // comments above test module use imports (use super::*, Infallible,
ErrorType) in all 8 driver .rs files
- All 8 drivers build, all 75 tests pass
- Remove duplicate //! @file/@brief/@author/@date blocks from all 8 board.rs
- Update original @brief to consistent 'Board-level HAL helpers for the XXX driver'
- Add // comment above pub mod in all 7 lib.rs files
- All 8 drivers build, all 75 tests pass
- Add // comments to mod declarations, use imports, static items, and
PICOTOOL_ENTRIES in all 8 main.rs files matching rp-hal template style
- Add //! file headers to all 8 board.rs files
- Add // comments to all board.rs use imports and HAL alias
- All 8 drivers build successfully, all 75 tests pass
- Add board.rs to all 8 drivers: constants, type aliases, init functions,
and HAL-specific helpers with full docstrings and pub(crate) visibility
- Slim main.rs to boilerplate + main() only, zero helper functions
- Fix i2c.rs: add file header, full docstrings on all functions
- Fix lcd1602.rs: add file header, full docstrings on all functions
- Fix lib.rs headers for 0x07 and 0x08
- All 8 drivers build and all 75 tests pass
