#![deny(warnings)]
#![deny(unsafe_code)]
#![no_main]
#![no_std]
extern crate cortex_m;
extern crate cortex_m_rt as rt;
extern crate nb;
extern crate panic_semihosting;
extern crate stm32l1xx_hal as hal;
use core::fmt::Write;
use hal::prelude::*;
use hal::rcc::Config;
use hal::serial;
use hal::stm32;
use nb::block;
use rt::entry;
#[entry]
fn main() -> ! {
let dp = stm32::Peripherals::take().unwrap();
let mut rcc = dp.RCC.freeze(Config::hsi());
let gpiob = dp.GPIOB.split();
let tx = gpiob.pb10;
let rx = gpiob.pb11;
let serial = dp
.USART3
.usart((tx, rx), serial::Config::default(), &mut rcc)
.unwrap();
let (mut tx, mut rx) = serial.split();
loop {
let received = block!(rx.read()).unwrap();
tx.write_str("\r\n").unwrap();
block!(tx.write(received)).ok();
}
}