py32f0xx-hal 0.2.2

Peripheral access API for py32F0 series microcontrollers
Documentation 
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#![no_main]
#![no_std]

use core::fmt::Write;

use panic_halt as _;

use py32f0xx_hal as hal;

use crate::hal::{
    pac,
    prelude::*,
    rcc::{HSIFreq, MCODiv, MCOSrc},
};

use cortex_m_rt::entry;
use embedded_hal_02::serial::{Read, Write as OtherWrite};

#[entry]
fn main() -> ! {
    let p = pac::Peripherals::take().unwrap();
    let mut flash = p.FLASH;
    let rcc = p
        .RCC
        .configure()
        .hsi(HSIFreq::Freq24mhz)
        .sysclk(24.MHz())
        .freeze(&mut flash);
    rcc.configure_mco(MCOSrc::Sysclk, MCODiv::NotDivided);

    let gpioa = p.GPIOA.split();

    let (tx, rx) = (
        gpioa.pa2.into_alternate_af1(),
        gpioa.pa3.into_alternate_af1(),
    );

    let mut serial = p.USART1.serial((tx, rx), 115_200.bps(), &rcc.clocks);
    serial.write_str("Input any key:\r\n").ok();

    loop {
        // Wait for reception of a single byte
        let received: u8 = nb::block!(serial.read()).unwrap();

        // Send back previously received byte and wait for completion
        nb::block!(serial.write(received)).ok();
    }
}