From 5534a3650755ba7e5d406eb5c78d4f5f0d4d3716 Mon Sep 17 00:00:00 2001
From: Alan Rosenthal <alanrosenthal@google.com>
Date: Tue, 10 Jun 2025 18:46:41 -0400
Subject: Add RTC example for STM32C0

Tested on STM32C0116F6

Requries: https://github.com/embassy-rs/stm32-data/pull/617
---
 examples/stm32c0/Cargo.toml     |  3 ++-
 examples/stm32c0/src/bin/rtc.rs | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 examples/stm32c0/src/bin/rtc.rs

(limited to 'examples')

diff --git a/examples/stm32c0/Cargo.toml b/examples/stm32c0/Cargo.toml
index 4cf07cef4..70a7b0895 100644
--- a/examples/stm32c0/Cargo.toml
+++ b/examples/stm32c0/Cargo.toml
@@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 # Change stm32c031c6 to your chip name, if necessary.
-embassy-stm32 = { version = "0.2.0", path = "../../embassy-stm32", features = [ "defmt", "time-driver-any", "stm32c031c6", "memory-x", "unstable-pac", "exti"]  }
+embassy-stm32 = { version = "0.2.0", path = "../../embassy-stm32", features = [ "defmt", "time-driver-any", "stm32c031c6", "memory-x", "unstable-pac", "exti", "chrono"]  }
 embassy-sync = { version = "0.7.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.7.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt"] }
 embassy-time = { version = "0.4.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
@@ -19,6 +19,7 @@ cortex-m-rt = "0.7.0"
 embedded-hal = "0.2.6"
 panic-probe = { version = "1.0.0", features = ["print-defmt"] }
 heapless = { version = "0.8", default-features = false }
+chrono = { version = "^0.4", default-features = false}
 
 [profile.release]
 debug = 2
diff --git a/examples/stm32c0/src/bin/rtc.rs b/examples/stm32c0/src/bin/rtc.rs
new file mode 100644
index 000000000..82d8a37ba
--- /dev/null
+++ b/examples/stm32c0/src/bin/rtc.rs
@@ -0,0 +1,35 @@
+#![no_std]
+#![no_main]
+
+use chrono::{NaiveDate, NaiveDateTime};
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::rtc::{Rtc, RtcConfig};
+use embassy_stm32::Config;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let config = Config::default();
+    let p = embassy_stm32::init(config);
+
+    info!("Hello World!");
+
+    let now = NaiveDate::from_ymd_opt(2020, 5, 15)
+        .unwrap()
+        .and_hms_opt(10, 30, 15)
+        .unwrap();
+
+    let mut rtc = Rtc::new(p.RTC, RtcConfig::default());
+
+    rtc.set_datetime(now.into()).expect("datetime not set");
+
+    loop {
+        let now: NaiveDateTime = rtc.now().unwrap().into();
+
+        info!("{}", now.and_utc().timestamp());
+
+        Timer::after_millis(1000).await;
+    }
+}
-- 
cgit