Add poll_seconds, poll_millis & poll_micros attributes

CLAUDE.md

@@ -93,13 +93,24 @@ Processes the controller impl block. Distinguishes between:
 * Creates `<StructName><MethodName>` stream type and `<StructName><MethodName>Args` struct.
 * Signal methods are NOT exposed in the client API (controller emits them directly).
 
+**Poll methods** (marked with `#[controller(poll_*)]`):
+* Methods are called periodically at the specified interval.
+* Three time unit attributes are supported:
+  * `#[controller(poll_seconds = N)]` - Poll every N seconds.
+  * `#[controller(poll_millis = N)]` - Poll every N milliseconds.
+  * `#[controller(poll_micros = N)]` - Poll every N microseconds.
+* Methods with the same timeout value (same unit and value) are grouped into a single ticker arm.
+* All methods in a group are called sequentially when the ticker fires (in declaration order).
+* Poll methods are NOT exposed in the client API (internal to the controller).
+* Uses `embassy_time::Ticker::every()` for timing.
+
 **Getter/setter methods** (from struct field attributes):
 * Receives getter/setter field info from struct processing.
 * Generates client-side getter methods that request current field value.
 * Generates client-side setter methods that update field value (and broadcast if published).
 
 The generated `run()` method contains a `select_biased!` loop that receives method calls from
-clients and dispatches them to the user's implementations.
+clients, dispatches them to the user's implementations, and handles periodic poll method calls.
 
 ### Utilities (`src/util.rs`)
 Case conversion functions (`pascal_to_snake_case`, `snake_to_pascal_case`) used for generating type and method names.
@@ -109,6 +120,7 @@ Case conversion functions (`pascal_to_snake_case`, `snake_to_pascal_case`) used
 User code must have these dependencies (per README):
 * `futures` with `async-await` feature.
 * `embassy-sync` for channels and synchronization.
+* `embassy-time` for poll method timing (only required if using poll methods).
 
 Dev dependencies include `embassy-executor` and `embassy-time` for testing.
 

Cargo.toml

@@ -30,10 +30,5 @@ embassy-sync = "0.7.2"
 embassy-executor = { version = "0.9.1", features = [
     "arch-std",
     "executor-thread",
-    "defmt",
-] }
-embassy-time = { version = "0.5.0", features = [
-    "defmt",
-    "defmt-timestamp-uptime",
-    "tick-hz-32_768",
 ] }
+embassy-time = { version = "0.5.0", features = ["mock-driver"] }

README.md

@@ -185,12 +185,72 @@ methods:
     signal events. The stream yields `<struct-name><method-name-in-pascal-case>Args` structs
     (e.g., `ControllerPowerErrorArgs`) containing all signal arguments as public fields.
 
+## Poll Methods
+
+Methods can be marked for periodic execution using poll attributes. These methods are called
+automatically by the controller's `run()` loop at the specified interval.
+
+Three time unit attributes are supported:
+* `#[controller(poll_seconds = N)]` - Poll every N seconds.
+* `#[controller(poll_millis = N)]` - Poll every N milliseconds.
+* `#[controller(poll_micros = N)]` - Poll every N microseconds.
+
+Example:
+```rust,no_run
+use firmware_controller::controller;
+
+#[controller]
+mod sensor_controller {
+    pub struct Controller {
+        #[controller(publish)]
+        temperature: f32,
+    }
+
+    impl Controller {
+        // Called every 5 seconds.
+        #[controller(poll_seconds = 5)]
+        pub async fn read_temperature(&mut self) {
+            // Read from sensor and update state.
+            self.set_temperature(42.0).await;
+        }
+
+        // Called every 100ms.
+        #[controller(poll_millis = 100)]
+        pub async fn check_watchdog(&mut self) {
+            // Pet the watchdog.
+        }
+
+        // Both called every second (grouped together).
+        #[controller(poll_seconds = 1)]
+        pub async fn log_status(&self) {
+            // Log current status.
+        }
+
+        #[controller(poll_seconds = 1)]
+        pub async fn blink_led(&mut self) {
+            // Toggle LED.
+        }
+    }
+}
+
+fn main() {}
+```
+
+Key characteristics:
+* Poll methods are **not** exposed in the client API. They are internal periodic tasks managed
+  entirely by the controller's `run()` loop.
+* Methods with the same timeout value (same unit and value) are grouped into a single timer arm
+  and called sequentially when the timer fires (in declaration order).
+* Uses `embassy_time::Ticker` for timing, which ensures consistent intervals regardless of method
+  execution time.
+
 ## Dependencies assumed
 
 The `controller` macro assumes that you have the following dependencies in your `Cargo.toml`:
 
 * `futures` with `async-await` feature enabled.
 * `embassy-sync`
+* `embassy-time` (only required if using poll methods)
 
 ## Known limitations & Caveats