Remove embassy_hal_common::usb.

The replacement is `embassy-usb`. There's a WIP driver for stm32 USBD in #709,
there's no WIP driver for stm32 USB_OTG. This means we're left without
USB_OTG support for now.

Reason for removing is I'm going to soon remove `embassy::io`, and
USB uses it. I don't want to spend time maintaining "dead" code
that is going to be removed. Volunteers welcome, either to update
old USB to the new IO, or write a USB_OTG driver fo the new USB.

1 files changed, 0 insertions, 115 deletions

diff --git a/examples/stm32l4/src/bin/usb_uart.rs b/examples/stm32l4/src/bin/usb_uart.rs
deleted file mode 100644
index 878309550..000000000
--- a/examples/stm32l4/src/bin/usb_uart.rs
+++ /dev/null
@@ -1,115 +0,0 @@
-#![no_std]
-#![no_main]
-#![feature(type_alias_impl_trait)]
-
-use defmt_rtt as _; // global logger
-use panic_probe as _;
-
-use defmt::{info, unwrap};
-use defmt_rtt as _; // global logger
-use embassy::interrupt::InterruptExt;
-use futures::pin_mut;
-use panic_probe as _; // print out panic messages
-
-use embassy::executor::Spawner;
-use embassy::io::{AsyncBufReadExt, AsyncWriteExt};
-use embassy_stm32::pac::pwr::vals::Usv;
-use embassy_stm32::pac::{PWR, RCC};
-use embassy_stm32::rcc::{ClockSrc, PLLClkDiv, PLLMul, PLLSource, PLLSrcDiv};
-use embassy_stm32::usb_otg::{State, Usb, UsbBus, UsbOtg, UsbSerial};
-use embassy_stm32::{interrupt, Config, Peripherals};
-use usb_device::device::{UsbDeviceBuilder, UsbVidPid};
-
-static mut EP_MEMORY: [u32; 2048] = [0; 2048];
-
-// USB requires at least 48 MHz clock
-fn config() -> Config {
-    let mut config = Config::default();
-    // set up a 80Mhz clock
-    config.rcc.mux = ClockSrc::PLL(
-        PLLSource::HSI16,
-        PLLClkDiv::Div2,
-        PLLSrcDiv::Div2,
-        PLLMul::Mul20,
-        None,
-    );
-    // enable HSI48 clock for USB
-    config.rcc.hsi48 = true;
-    config
-}
-
-#[embassy::main(config = "config()")]
-async fn main(_spawner: Spawner, p: Peripherals) {
-    // Enable PWR peripheral
-    unsafe { RCC.apb1enr1().modify(|w| w.set_pwren(true)) };
-    unsafe { PWR.cr2().modify(|w| w.set_usv(Usv::VALID)) }
-
-    let mut rx_buffer = [0u8; 64];
-    // we send back input + cr + lf
-    let mut tx_buffer = [0u8; 66];
-
-    let peri = UsbOtg::new_fs(p.USB_OTG_FS, p.PA12, p.PA11);
-    let usb_bus = UsbBus::new(peri, unsafe { &mut EP_MEMORY });
-
-    let serial = UsbSerial::new(&usb_bus, &mut rx_buffer, &mut tx_buffer);
-
-    let device = UsbDeviceBuilder::new(&usb_bus, UsbVidPid(0x16c0, 0x27dd))
-        .manufacturer("Fake company")
-        .product("Serial port")
-        .serial_number("TEST")
-        .device_class(0x02)
-        .build();
-
-    let irq = interrupt::take!(OTG_FS);
-    irq.set_priority(interrupt::Priority::P3);
-
-    let mut state = State::new();
-    let usb = unsafe { Usb::new(&mut state, device, serial, irq) };
-    pin_mut!(usb);
-
-    let (mut reader, mut writer) = usb.as_ref().take_serial_0();
-
-    info!("usb initialized!");
-
-    unwrap!(
-        writer
-            .write_all(b"\r\nInput returned upper cased on CR+LF\r\n")
-            .await
-    );
-
-    let mut buf = [0u8; 64];
-    loop {
-        let mut n = 0;
-
-        async {
-            loop {
-                let char = unwrap!(reader.read_byte().await);
-
-                if char == b'\r' || char == b'\n' {
-                    break;
-                }
-
-                buf[n] = char;
-                n += 1;
-
-                // stop if we're out of room
-                if n == buf.len() {
-                    break;
-                }
-            }
-        }
-        .await;
-
-        if n > 0 {
-            for char in buf[..n].iter_mut() {
-                // upper case
-                if 0x61 <= *char && *char <= 0x7a {
-                    *char &= !0x20;
-                }
-            }
-            unwrap!(writer.write_all(&buf[..n]).await);
-            unwrap!(writer.write_all(b"\r\n").await);
-            unwrap!(writer.flush().await);
-        }
-    }
-}