move nfc to background tasks

src/background_tasks.rs

@@ -0,0 +1 @@
+pub mod nfc;

src/background_tasks/nfc.rs

@@ -0,0 +1,36 @@
+#[embassy_executor::task]
+#[allow(
+    clippy::large_stack_frames,
+    reason = "ignoring this for now because it still works"
+)]
+async fn nfc_driver_task(
+    mut nfc_driver: NfcPn532Driver<AtomicDevice<'static, I2c<'static, Blocking>>>,
+) {
+    loop {
+        while CARD_DATA.lock().await.is_none() {
+            let start = Instant::now();
+            match nfc_driver.read_card_data().await {
+                Ok(card_data) => {
+                    let Some(split_data) = split_nfc_hex(&card_data) else {
+                        log::error!("Failed to split NFC card data");
+                        continue;
+                    };
+                    CARD_DATA
+                        .lock()
+                        .await
+                        .replace(Card::try_from(split_data).unwrap());
+                    let elapsed_ms = start.elapsed().as_millis();
+                    log::info!(
+                        "NFC read duration: {} ms, card data length: {}",
+                        elapsed_ms,
+                        card_data.len()
+                    );
+                }
+                Err(e) => {
+                    log::error!("NFC read failed: {e}");
+                }
+            }
+        }
+        embassy_time::Timer::after(embassy_time::Duration::from_millis(1000)).await;
+    }
+}

src/bin/main.rs

@@ -138,43 +138,6 @@ async fn main(spawner: Spawner) {
     spawner.spawn(nfc_driver_task(nfc_driver).expect("nfc driver task failed"));
 }
 
-#[embassy_executor::task]
-#[allow(
-    clippy::large_stack_frames,
-    reason = "ignoring this for now because it still works"
-)]
-async fn nfc_driver_task(
-    mut nfc_driver: NfcPn532Driver<AtomicDevice<'static, I2c<'static, Blocking>>>,
-) {
-    loop {
-        while CARD_DATA.lock().await.is_none() {
-            let start = Instant::now();
-            match nfc_driver.read_card_data().await {
-                Ok(card_data) => {
-                    let Some(split_data) = split_nfc_hex(&card_data) else {
-                        log::error!("Failed to split NFC card data");
-                        continue;
-                    };
-                    CARD_DATA
-                        .lock()
-                        .await
-                        .replace(Card::try_from(split_data).unwrap());
-                    let elapsed_ms = start.elapsed().as_millis();
-                    log::info!(
-                        "NFC read duration: {} ms, card data length: {}",
-                        elapsed_ms,
-                        card_data.len()
-                    );
-                }
-                Err(e) => {
-                    log::error!("NFC read failed: {e}");
-                }
-            }
-        }
-        embassy_time::Timer::after(embassy_time::Duration::from_millis(1000)).await;
-    }
-}
-
 fn display_shit(oled: &mut SecondaryDisplay<'static>, text: &str) {
     oled.clear().unwrap();
 

src/lib.rs

@@ -2,6 +2,7 @@
 
 extern crate alloc;
 
+pub mod background_tasks;
 pub mod card;
 pub mod display;
 pub mod drivers;