Get a dummy keyboard working

src/usb.rs

@@ -0,0 +1,57 @@
+use embassy_rp::{interrupt, peripherals::USB, usb::Driver};
+use embassy_usb::{Builder, Config, UsbDevice};
+use static_cell::StaticCell;
+
+pub mod keyboard;
+pub mod logger;
+
+pub const MAX_PACKET_SIZE: u8 = 64;
+
+struct State {
+    device_descriptor: [u8; 256],
+    config_descriptor: [u8; 256],
+    bos_descriptor: [u8; 256],
+    control_buf: [u8; 64],
+}
+
+static STATE: StaticCell<State> = StaticCell::new();
+
+pub fn builder(usb: USB) -> Builder<'static, Driver<'static, USB>> {
+    let state = STATE.init(State {
+        device_descriptor: [0; 256],
+        config_descriptor: [0; 256],
+        bos_descriptor: [0; 256],
+        control_buf: [0; 64],
+    });
+
+    // Create embassy-usb Config
+    let mut config = Config::new(0xc0de, 0xcafe);
+    config.manufacturer = Some("Tux");
+    config.product = Some("Tangentbord1");
+    config.serial_number = Some("42069");
+    config.max_power = 100;
+    config.max_packet_size_0 = MAX_PACKET_SIZE;
+
+    // Required for windows compatiblity.
+    // https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/kconfig/CONFIG_CDC_ACM_IAD.html#help
+    config.device_class = 0xEF;
+    config.device_sub_class = 0x02;
+    config.device_protocol = 0x01;
+    config.composite_with_iads = true;
+
+    let driver = Driver::new(usb, interrupt::take!(USBCTRL_IRQ));
+
+    Builder::new(
+        driver,
+        config,
+        &mut state.device_descriptor,
+        &mut state.config_descriptor,
+        &mut state.bos_descriptor,
+        &mut state.control_buf,
+    )
+}
+
+#[embassy_executor::task]
+pub async fn run(mut device: UsbDevice<'static, Driver<'static, USB>>) {
+    device.run().await
+}