Solution 1

  1. #![deny(unsafe_code)]
  2. #![no_main]
  3. #![no_std]
  5. #[allow(unused_imports)]
  6. use aux15::{entry, iprint, iprintln, prelude::*, Direction, I16x3};
  8. #[entry]
  9. fn main() -> ! {
  10.     let (mut leds, mut lsm303dlhc, mut delay, _itm) = aux15::init();
  12.     loop {
  13.         let I16x3 { x, y, .. } = lsm303dlhc.mag().unwrap();
  15.         // Look at the signs of the X and Y components to determine in which
  16.         // quadrant the magnetic field is
  17.         let dir = match (x > 0, y > 0) {
  18.             // Quadrant I
  19.             (true, true) => Direction::Southeast,
  20.             // Quadrant II
  21.             (false, true) => Direction::Northeast,
  22.             // Quadrant III
  23.             (false, false) => Direction::Northwest,
  24.             // Quadrant IV
  25.             (true, false) => Direction::Southwest,
  26.         };
  28.         leds.iter_mut().for_each(|led| led.off());
  29.         leds[dir].on();
  31.         delay.delay_ms(1_000_u16);
  32.     }
  33. }