Board support crates

Board support crates provide a further level of wrapping for a specific board for convenience.

#![no_main]
#![no_std]
extern crate panic_halt as _;
use cortex_m_rt::entry;
use embedded_hal::digital::OutputPin;
use microbit::Board;
#[entry]
fn main() -> ! {
    let mut board = Board::take().unwrap();
    board.display_pins.col1.set_low().unwrap();
    board.display_pins.row1.set_high().unwrap();
    loop {}
}

• In this case the board support crate is just providing more useful names, and a bit of initialisation.
• The crate may also include drivers for some on-board devices outside of the microcontroller itself.
  • microbit-v2 includes a simple driver for the LED matrix.

Run the example with:

cargo embed --bin board_support