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#![no_std]
#![no_main]
use defmt::{info, panic, unwrap};
use embassy_executor::Spawner;
use embassy_nrf::usb::vbus_detect::HardwareVbusDetect;
use embassy_nrf::usb::Driver;
use embassy_nrf::{bind_interrupts, pac, peripherals, usb};
use embassy_usb::class::cdc_acm::{CdcAcmClass, State};
use embassy_usb::driver::EndpointError;
use embassy_usb::{Builder, Config, UsbDevice};
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
bind_interrupts!(struct Irqs {
USBD => usb::InterruptHandler<peripherals::USBD>;
CLOCK_POWER => usb::vbus_detect::InterruptHandler;
});
type MyDriver = Driver<'static, peripherals::USBD, HardwareVbusDetect>;
#[embassy_executor::task]
async fn usb_task(mut device: UsbDevice<'static, MyDriver>) {
device.run().await;
}
#[embassy_executor::task]
async fn echo_task(mut class: CdcAcmClass<'static, MyDriver>) {
loop {
class.wait_connection().await;
info!("Connected");
let _ = echo(&mut class).await;
info!("Disconnected");
}
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
let p = embassy_nrf::init(Default::default());
info!("Enabling ext hfosc...");
pac::CLOCK.tasks_hfclkstart().write_value(1);
while pac::CLOCK.events_hfclkstarted().read() != 1 {}
// Create the driver, from the HAL.
let driver = Driver::new(p.USBD, Irqs, HardwareVbusDetect::new(Irqs));
// Create embassy-usb Config
let mut config = Config::new(0xc0de, 0xcafe);
config.manufacturer = Some("Embassy");
config.product = Some("USB-serial example");
config.serial_number = Some("12345678");
config.max_power = 100;
config.max_packet_size_0 = 64;
static STATE: StaticCell<State> = StaticCell::new();
let state = STATE.init(State::new());
// Create embassy-usb DeviceBuilder using the driver and config.
static CONFIG_DESC: StaticCell<[u8; 256]> = StaticCell::new();
static BOS_DESC: StaticCell<[u8; 256]> = StaticCell::new();
static MSOS_DESC: StaticCell<[u8; 128]> = StaticCell::new();
static CONTROL_BUF: StaticCell<[u8; 128]> = StaticCell::new();
let mut builder = Builder::new(
driver,
config,
&mut CONFIG_DESC.init([0; 256])[..],
&mut BOS_DESC.init([0; 256])[..],
&mut MSOS_DESC.init([0; 128])[..],
&mut CONTROL_BUF.init([0; 128])[..],
);
// Create classes on the builder.
let class = CdcAcmClass::new(&mut builder, state, 64);
// Build the builder.
let usb = builder.build();
spawner.spawn(unwrap!(usb_task(usb)));
spawner.spawn(unwrap!(echo_task(class)));
}
struct Disconnected {}
impl From<EndpointError> for Disconnected {
fn from(val: EndpointError) -> Self {
match val {
EndpointError::BufferOverflow => panic!("Buffer overflow"),
EndpointError::Disabled => Disconnected {},
}
}
}
async fn echo(class: &mut CdcAcmClass<'static, MyDriver>) -> Result<(), Disconnected> {
let mut buf = [0; 64];
loop {
let n = class.read_packet(&mut buf).await?;
let data = &buf[..n];
info!("data: {:x}", data);
class.write_packet(data).await?;
}
}
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