Use time instead of rtcc, add rtc-example

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+- Use `time` for `Rtc` instead of `rtcc`, add `rtc` example [#436]
 - Move `i2c` `embedded-hal` trait impls to `I2c` methods [#431]
 - Reexport pins in `gpio` module
 - Add channel events, make Event use bitflags (simplify interrupt handling) [#425]
@@ -38,6 +39,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 [#429]: https://github.com/stm32-rs/stm32f4xx-hal/pull/429
 [#431]: https://github.com/stm32-rs/stm32f4xx-hal/pull/431
 [#434]: https://github.com/stm32-rs/stm32f4xx-hal/pull/434
+[#436]: https://github.com/stm32-rs/stm32f4xx-hal/pull/436
 
 ### Changed
 

Cargo.toml

@@ -32,7 +32,6 @@ cortex-m = "0.7.4"
 cortex-m-rt = "0.7"
 nb = "1"
 rand_core = "0.6"
-rtcc = "0.2"
 stm32f4 = "0.14.0"
 synopsys-usb-otg = { version = "0.2.0", features = ["cortex-m"], optional = true }
 sdio-host = { version = "0.5.0", optional = true }
@@ -48,6 +47,10 @@ rtic-monotonic = { version = "1.0", optional = true }
 bitflags = "1.3.2"
 embedded-storage = "0.2"
 
+[dependencies.time]
+version = "0.3"
+default-features = false
+
 [dependencies.stm32_i2s_v12x]
 version = "0.2.0"
 optional = true
@@ -58,6 +61,7 @@ panic-semihosting = "0.5.3"
 cortex-m-semihosting = "0.3.3"
 heapless = "0.7.5"
 panic-halt = "0.2.0"
+panic-rtt-target = { version = "0.1.2", features = ["cortex-m"] }
 ssd1306 = "0.7.0"
 embedded-graphics = "0.7.1"
 usb-device = "0.2.5"
@@ -73,6 +77,11 @@ ist7920 = "0.1.0"
 smart-leds = "0.3.0"
 ws2812-spi = { version = "0.4.0", features = [] }
 
+[dev-dependencies.time]
+version = "0.3"
+default-features = false
+features = ["macros"]
+
 [features]
 device-selected = []
 rt = ["stm32f4/rt"]
@@ -457,3 +466,7 @@ required-features = ["rt", "stm32f411"]
 name = "dynamic_gpio"
 required-features = ["device-selected"]
 
+[[example]]
+name = "rtc"
+required-features = ["device-selected"]
+

examples/rtc.rs

@@ -0,0 +1,48 @@
+//! This example demonstrates how to use the RTC.
+//! Note that the LSI can be quite inaccurate.
+//! The tolerance is up to ±47% (Min 17 kHz, Typ 32 kHz, Max 47 kHz).
+
+#![no_main]
+#![no_std]
+
+use cortex_m_rt::entry;
+use panic_rtt_target as _;
+use rtt_target::{rprintln, rtt_init_print};
+
+use stm32f4xx_hal::{pac, prelude::*, rtc::Rtc};
+use time::{
+    macros::{date, time},
+    PrimitiveDateTime,
+};
+
+#[entry]
+fn main() -> ! {
+    rtt_init_print!();
+    let mut p = pac::Peripherals::take().unwrap();
+    let rcc = p.RCC.constrain();
+
+    let clocks = rcc.cfgr.freeze();
+
+    let mut rtc = Rtc::new(p.RTC, 249, 127, false, &mut p.PWR);
+    let mut delay = p.TIM5.delay_us(&clocks);
+
+    rtc.set_datetime(&PrimitiveDateTime::new(
+        date!(2022 - 02 - 07),
+        time!(23:59:50),
+    ))
+    .unwrap();
+    // Alternatively:
+    // rtc.set_date(&date!(2022 - 02 - 07)).unwrap();
+    // rtc.set_time(&time!(23:59:50)).unwrap();
+    // Or:
+    // rtc.set_year(2022).unwrap();
+    // rtc.set_month(02).unwrap();
+    // rtc.set_day(07).unwrap();
+    // rtc.set_hours(23).unwrap();
+    // rtc.set_minutes(59).unwrap();
+    // rtc.set_seconds(50).unwrap();
+    loop {
+        rprintln!("{}", rtc.get_datetime());
+        delay.delay(500.millis()).unwrap();
+    }
+}