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//! This example shows how to use RTC (Real Time Clock) for scheduling alarms and reacting to them.
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_futures::select::{select, Either};
use embassy_rp::bind_interrupts;
use embassy_rp::rtc::{DateTime, DateTimeFilter, DayOfWeek, Rtc};
use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _};
// Bind the RTC interrupt to the handler
bind_interrupts!(struct Irqs {
RTC_IRQ => embassy_rp::rtc::InterruptHandler;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_rp::init(Default::default());
let mut rtc = Rtc::new(p.RTC, Irqs);
if !rtc.is_running() {
info!("Start RTC");
let now = DateTime {
year: 2000,
month: 1,
day: 1,
day_of_week: DayOfWeek::Saturday,
hour: 0,
minute: 0,
second: 0,
};
rtc.set_datetime(now).unwrap();
}
loop {
// Wait for 5 seconds or until the alarm is triggered
match select(Timer::after_secs(5), rtc.wait_for_alarm()).await {
// Timer expired
Either::First(_) => {
let dt = rtc.now().unwrap();
info!(
"Now: {}-{:02}-{:02} {}:{:02}:{:02}",
dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
);
// See if the alarm is already scheduled, if not, schedule it
if rtc.alarm_scheduled().is_none() {
info!("Scheduling alarm for 30 seconds from now");
rtc.schedule_alarm(DateTimeFilter::default().second((dt.second + 30) % 60));
info!("Alarm scheduled: {}", rtc.alarm_scheduled().unwrap());
}
}
// Alarm triggered
Either::Second(_) => {
let dt = rtc.now().unwrap();
info!(
"ALARM TRIGGERED! Now: {}-{:02}-{:02} {}:{:02}:{:02}",
dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
);
}
}
}
}
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