#![no_std]
#![no_main]
use panic_halt as _;
use cortex_m_rt::entry;
use stm32f4xx_hal::otg_fs::{UsbBus, USB};
use stm32f4xx_hal::{pac, prelude::*};
use usb_device::prelude::*;
static mut EP_MEMORY: [u32; 1024] = [0; 1024];
#[entry]
fn main() -> ! {
let dp = pac::Peripherals::take().unwrap();
let rcc = dp.RCC.constrain();
let clocks = rcc
.cfgr
.use_hse(25.MHz())
.sysclk(48.MHz())
.require_pll48clk()
.freeze();
let gpioa = dp.GPIOA.split();
let usb = USB {
usb_global: dp.OTG_FS_GLOBAL,
usb_device: dp.OTG_FS_DEVICE,
usb_pwrclk: dp.OTG_FS_PWRCLK,
pin_dm: gpioa.pa11.into_alternate(),
pin_dp: gpioa.pa12.into_alternate(),
hclk: clocks.hclk(),
};
let usb_bus = UsbBus::new(usb, unsafe { &mut EP_MEMORY });
let mut serial = usbd_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(usbd_serial::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 => {
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;
}
_ => {}
}
}
}
_ => {}
}
}
}