swaits
7effaa293b
config (constants), usb (driver + tasks), led (NeoPixel anims), mouse (cursor anims + HID), kbd (F13 wake + HID), chart (statechart + Ctx/Ev + JigglyActions). main.rs is now just Irqs + USB builder + chart.run(). No behavior change — comments, deadlines, and tunables preserved verbatim. Builds clean on default and --features embassy,defmt; clippy -D warnings passes.
58 lines
2.0 KiB
Rust
58 lines
2.0 KiB
Rust
//! USB driver type aliases, identity helpers, and infra tasks
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//! (USB device pump + watchdog feeder).
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use embassy_rp::{
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Peri,
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flash::Flash,
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peripherals::{FLASH, USB},
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usb::Driver,
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watchdog::Watchdog,
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};
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use embassy_time::Timer;
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use embassy_usb::UsbDevice;
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use static_cell::StaticCell;
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use crate::config::{WATCHDOG_FEED_INTERVAL, WATCHDOG_TIMEOUT};
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pub(crate) type UsbDriver = Driver<'static, USB>;
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// ── USB serial number from RP2040 unique chip ID ───────────────────
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// Reads the 64-bit unique ID baked into the on-board SPI flash, formats
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// it as 16 ASCII hex chars in a static buffer, and returns a `'static`
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// string suitable for `embassy_usb::Config::serial_number`. This makes
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// the device's USB identity stable per-board across replugs (so hosts
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// stop treating each plug as a new device) while still being unique
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// between different boards.
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const FLASH_SIZE: usize = 2 * 1024 * 1024; // Xiao RP2040 has 2 MB.
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pub(crate) fn make_serial(flash_periph: Peri<'static, FLASH>) -> &'static str {
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static SERIAL: StaticCell<[u8; 16]> = StaticCell::new();
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const HEX: &[u8; 16] = b"0123456789ABCDEF";
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let mut flash = Flash::<_, _, FLASH_SIZE>::new_blocking(flash_periph);
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let mut id = [0u8; 8];
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let _ = flash.blocking_unique_id(&mut id);
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let buf = SERIAL.init([0; 16]);
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for (i, &b) in id.iter().enumerate() {
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buf[i * 2] = HEX[(b >> 4) as usize];
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buf[i * 2 + 1] = HEX[(b & 0x0f) as usize];
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}
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core::str::from_utf8(buf).unwrap()
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}
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// ── Tasks ──────────────────────────────────────────────────────────
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#[embassy_executor::task]
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pub(crate) async fn usb_task(mut device: UsbDevice<'static, UsbDriver>) {
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device.run().await;
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}
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#[embassy_executor::task]
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pub(crate) async fn watchdog_task(mut wd: Watchdog) -> ! {
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loop {
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wd.feed(WATCHDOG_TIMEOUT);
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Timer::after(WATCHDOG_FEED_INTERVAL).await;
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}
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}
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