feat: log rtc time to terminal over rtt

examples/rtc-log.rs

@@ -0,0 +1,53 @@
+#![no_main]
+#![no_std]
+
+use defmt::info;
+use hal::pwr::PWR;
+use hal::rtc::{Datelike, NaiveDateTime, Rtc, Timelike};
+use panic_probe as _;
+
+use defmt_rtt as _; // global logger
+
+use cortex_m_rt::entry;
+use hal::{pac, prelude::*, rcc::Config};
+
+#[entry]
+fn main() -> ! {
+    let dp = pac::Peripherals::take().unwrap();
+    let cp = cortex_m::Peripherals::take().unwrap();
+
+    // Configure the clock.
+    let mut rcc = dp.RCC.freeze(Config::hsi16());
+    let pwr = PWR::new(dp.PWR, &mut rcc);
+
+    let gpioa = dp.GPIOA.split(&mut rcc);
+    let mut led = gpioa.pa5.into_push_pull_output();
+
+    let mut delay = cp.SYST.delay(rcc.clocks);
+
+    let mut rtc = Rtc::new(dp.RTC, &mut rcc, &pwr, None).unwrap(); // starts at time 0
+
+    #[allow(clippy::never_loop)]
+    loop {
+        led.set_high().unwrap();
+        delay.delay_ms(500_u16);
+
+        led.set_low().unwrap();
+        delay.delay_ms(500_u16);
+
+        ptime(&mut rtc);
+    }
+}
+
+fn ptime(rtc: &mut Rtc) {
+    let time: NaiveDateTime = rtc.now();
+    info!(
+        "Time: {:04}-{:02}-{:02} {:02}:{:02}:{:02}",
+        time.year(),
+        time.month(),
+        time.day(),
+        time.hour(),
+        time.minute(),
+        time.second()
+    )
+}