223 lines
6.9 KiB
Rust
223 lines
6.9 KiB
Rust
#![no_std]
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#![no_main]
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use core::sync::atomic::{AtomicBool, Ordering};
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::exti::ExtiInput;
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use embassy_stm32::gpio::Pull;
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use embassy_stm32::time::Hertz;
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use embassy_stm32::usb::Driver;
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use embassy_stm32::{bind_interrupts, peripherals, usb, Config};
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use embassy_usb::class::hid::{HidReaderWriter, ReportId, RequestHandler, State};
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use embassy_usb::control::OutResponse;
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use embassy_usb::{Builder, Handler};
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use futures::future::join;
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use usbd_hid::descriptor::{KeyboardReport, SerializedDescriptor};
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use {defmt_rtt as _, panic_probe as _};
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bind_interrupts!(struct Irqs {
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OTG_FS => usb::InterruptHandler<peripherals::USB_OTG_FS>;
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});
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let mut config = Config::default();
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{
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use embassy_stm32::rcc::*;
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config.rcc.hse = Some(Hse {
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freq: Hertz(8_000_000),
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mode: HseMode::Bypass,
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});
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config.rcc.pll_src = PllSource::HSE;
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config.rcc.pll = Some(Pll {
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prediv: PllPreDiv::DIV4,
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mul: PllMul::MUL168,
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divp: Some(PllPDiv::DIV2), // 8mhz / 4 * 168 / 2 = 168Mhz.
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divq: Some(PllQDiv::DIV7), // 8mhz / 4 * 168 / 7 = 48Mhz.
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divr: None,
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});
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config.rcc.ahb_pre = AHBPrescaler::DIV1;
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config.rcc.apb1_pre = APBPrescaler::DIV4;
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config.rcc.apb2_pre = APBPrescaler::DIV2;
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config.rcc.sys = Sysclk::PLL1_P;
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config.rcc.mux.clk48sel = mux::Clk48sel::PLL1_Q;
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}
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let p = embassy_stm32::init(config);
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// Create the driver, from the HAL.
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let mut ep_out_buffer = [0u8; 256];
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let mut config = embassy_stm32::usb::Config::default();
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// If the board you’re using doesn’t have the VBUS pin wired up correctly for detecting the USB bus voltage (e.g. on the f4 blackpill board), set this to false
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config.vbus_detection = true;
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let driver = Driver::new_fs(p.USB_OTG_FS, Irqs, p.PA12, p.PA11, &mut ep_out_buffer, config);
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// Create embassy-usb Config
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let mut config = embassy_usb::Config::new(0xc0de, 0xcafe);
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config.manufacturer = Some("Embassy");
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config.product = Some("HID keyboard example");
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config.serial_number = Some("12345678");
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config.max_power = 100;
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config.max_packet_size_0 = 64;
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// Required for windows compatibility.
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// https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/kconfig/CONFIG_CDC_ACM_IAD.html#help
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config.device_class = 0xEF;
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config.device_sub_class = 0x02;
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config.device_protocol = 0x01;
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config.composite_with_iads = true;
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// Create embassy-usb DeviceBuilder using the driver and config.
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// It needs some buffers for building the descriptors.
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let mut config_descriptor = [0; 256];
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let mut bos_descriptor = [0; 256];
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// You can also add a Microsoft OS descriptor.
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let mut msos_descriptor = [0; 256];
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let mut control_buf = [0; 64];
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let request_handler = MyRequestHandler {};
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let mut device_handler = MyDeviceHandler::new();
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let mut state = State::new();
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let mut builder = Builder::new(
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driver,
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config,
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&mut config_descriptor,
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&mut bos_descriptor,
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&mut msos_descriptor,
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&mut control_buf,
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);
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builder.handler(&mut device_handler);
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// Create classes on the builder.
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let config = embassy_usb::class::hid::Config {
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report_descriptor: KeyboardReport::desc(),
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request_handler: Some(&request_handler),
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poll_ms: 60,
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max_packet_size: 8,
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};
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let hid = HidReaderWriter::<_, 1, 8>::new(&mut builder, &mut state, config);
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// Build the builder.
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let mut usb = builder.build();
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// Run the USB device.
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let usb_fut = usb.run();
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let (reader, mut writer) = hid.split();
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let mut button = ExtiInput::new(p.PC13, p.EXTI13, Pull::Down);
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// Do stuff with the class!
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let in_fut = async {
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loop {
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button.wait_for_rising_edge().await;
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// signal_pin.wait_for_high().await;
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info!("Button pressed!");
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// Create a report with the A key pressed. (no shift modifier)
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let report = KeyboardReport {
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keycodes: [4, 0, 0, 0, 0, 0],
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leds: 0,
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modifier: 0,
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reserved: 0,
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};
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// Send the report.
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match writer.write_serialize(&report).await {
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Ok(()) => {}
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Err(e) => warn!("Failed to send report: {:?}", e),
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};
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button.wait_for_falling_edge().await;
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// signal_pin.wait_for_low().await;
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info!("Button released!");
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let report = KeyboardReport {
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keycodes: [0, 0, 0, 0, 0, 0],
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leds: 0,
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modifier: 0,
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reserved: 0,
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};
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match writer.write_serialize(&report).await {
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Ok(()) => {}
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Err(e) => warn!("Failed to send report: {:?}", e),
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};
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}
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};
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let out_fut = async {
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reader.run(false, &request_handler).await;
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};
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// Run everything concurrently.
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// If we had made everything `'static` above instead, we could do this using separate tasks instead.
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join(usb_fut, join(in_fut, out_fut)).await;
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}
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struct MyRequestHandler {}
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impl RequestHandler for MyRequestHandler {
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fn get_report(&self, id: ReportId, _buf: &mut [u8]) -> Option<usize> {
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info!("Get report for {:?}", id);
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None
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}
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fn set_report(&self, id: ReportId, data: &[u8]) -> OutResponse {
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info!("Set report for {:?}: {=[u8]}", id, data);
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OutResponse::Accepted
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}
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fn set_idle_ms(&self, id: Option<ReportId>, dur: u32) {
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info!("Set idle rate for {:?} to {:?}", id, dur);
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}
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fn get_idle_ms(&self, id: Option<ReportId>) -> Option<u32> {
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info!("Get idle rate for {:?}", id);
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None
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}
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}
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struct MyDeviceHandler {
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configured: AtomicBool,
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}
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impl MyDeviceHandler {
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fn new() -> Self {
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MyDeviceHandler {
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configured: AtomicBool::new(false),
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}
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}
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}
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impl Handler for MyDeviceHandler {
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fn enabled(&mut self, enabled: bool) {
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self.configured.store(false, Ordering::Relaxed);
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if enabled {
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info!("Device enabled");
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} else {
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info!("Device disabled");
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}
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}
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fn reset(&mut self) {
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self.configured.store(false, Ordering::Relaxed);
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info!("Bus reset, the Vbus current limit is 100mA");
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}
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fn addressed(&mut self, addr: u8) {
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self.configured.store(false, Ordering::Relaxed);
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info!("USB address set to: {}", addr);
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}
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fn configured(&mut self, configured: bool) {
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self.configured.store(configured, Ordering::Relaxed);
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if configured {
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info!("Device configured, it may now draw up to the configured current limit from Vbus.")
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} else {
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info!("Device is no longer configured, the Vbus current limit is 100mA.");
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}
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}
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}
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