#![no_std]
#![no_main]
extern crate panic_semihosting;
use cortex_m::asm::delay;
use cortex_m_rt::entry;
use stm32f1xx_hal::usb::{Peripheral, UsbBus};
use stm32f1xx_hal::{pac, prelude::*};
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 rcc = dp.RCC.constrain();
let clocks = rcc
.cfgr
.use_hse(8.MHz())
.sysclk(48.MHz())
.pclk1(24.MHz())
.freeze(&mut flash.acr);
assert!(clocks.usbclk_valid());
let mut gpioc = dp.GPIOC.split();
let mut led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);
led.set_high();
let mut gpioa = dp.GPIOA.split();
let mut usb_dp = gpioa.pa12.into_push_pull_output(&mut gpioa.crh);
usb_dp.set_low();
delay(clocks.sysclk().raw() / 100);
let usb = Peripheral {
usb: dp.USB,
pin_dm: gpioa.pa11,
pin_dp: usb_dp.into_floating_input(&mut gpioa.crh),
};
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_low();
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_high(); }
}