| #![no_std] |
| |
| use libtock::result::TockResult; |
| use libtock::timer::Duration; |
| |
| #[libtock::main] |
| async fn main() -> TockResult<()> { |
| let mut drivers = libtock::retrieve_drivers()?; |
| |
| let leds_driver = drivers.leds.init_driver()?; |
| let mut timer_driver = drivers.timer.create_timer_driver(); |
| let timer_driver = timer_driver.activate()?; |
| |
| // Blink the LEDs in a binary count pattern and scale |
| // to the number of LEDs on the board. |
| let mut count: usize = 0; |
| loop { |
| for led in leds_driver.leds() { |
| let i = led.led_num(); |
| if count & (1 << i) == (1 << i) { |
| led.on()?; |
| } else { |
| led.off()?; |
| } |
| } |
| count = count.wrapping_add(1); |
| |
| // This delay uses an underlying timer in the kernel. |
| timer_driver.sleep(Duration::from_ms(250)).await?; |
| } |
| } |