#![no_std]
#![no_main]
use panic_semihosting as _;
use stm32f3xx_hal as hal;
use cortex_m::asm::delay;
use cortex_m_rt::entry;
use hal::pac;
use hal::prelude::*;
use hal::usb::{Peripheral, UsbBus};
use usb_device::prelude::*;
use usbd_serial::{SerialPort, USB_CLASS_CDC};
#[entry]
fn main() -> ! {
let dp = pac::Peripherals::take().unwrap();
let mut flash = dp.FLASH.constrain();
let mut rcc = dp.RCC.constrain();
let clocks = rcc
.cfgr
.use_hse(8.MHz())
.sysclk(48.MHz())
.pclk1(24.MHz())
.pclk2(24.MHz())
.freeze(&mut flash.acr);
assert!(clocks.usbclk_valid());
let mut gpioe = dp.GPIOE.split(&mut rcc.ahb);
let mut led = gpioe
.pe13
.into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
led.set_low().ok();
let mut gpioa = dp.GPIOA.split(&mut rcc.ahb);
let mut usb_dp = gpioa
.pa12
.into_push_pull_output(&mut gpioa.moder, &mut gpioa.otyper);
usb_dp.set_low().ok();
delay(clocks.sysclk().0 / 100);
let usb_dm = gpioa
.pa11
.into_af_push_pull(&mut gpioa.moder, &mut gpioa.otyper, &mut gpioa.afrh);
let usb_dp = usb_dp.into_af_push_pull(&mut gpioa.moder, &mut gpioa.otyper, &mut gpioa.afrh);
let usb = Peripheral {
usb: dp.USB,
pin_dm: usb_dm,
pin_dp: usb_dp,
};
let usb_bus = UsbBus::new(usb);
let mut serial = SerialPort::new(&usb_bus);
let mut usb_dev = UsbDeviceBuilder::new(&usb_bus, UsbVidPid(0x16c0, 0x27dd))
.manufacturer("Fake company")
.product("Serial port")
.serial_number("TEST")
.device_class(USB_CLASS_CDC)
.build();
loop {
if !usb_dev.poll(&mut [&mut serial]) {
continue;
}
let mut buf = [0u8; 64];
match serial.read(&mut buf) {
Ok(count) if count > 0 => {
led.set_high().ok();
for c in buf[0..count].iter_mut() {
if 0x61 <= *c && *c <= 0x7a {
*c &= !0x20;
}
}
let mut write_offset = 0;
while write_offset < count {
match serial.write(&buf[write_offset..count]) {
Ok(len) if len > 0 => {
write_offset += len;
}
_ => {}
}
}
}
_ => {}
}
led.set_low().ok(); }
}