#![deny(warnings)]
#![no_main]
#![no_std]
use cortex_m::asm;
use cortex_m_rt::entry;
#[macro_use]
mod utilities;
use log::info;
use stm32h7xx_hal::{pac, prelude::*, serial};
use core::fmt::Write;
use nb::block;
#[entry]
fn main() -> ! {
utilities::logger::init();
let dp = pac::Peripherals::take().unwrap();
info!("Setup PWR... ");
let pwr = dp.PWR.constrain();
let pwrcfg = example_power!(pwr).freeze();
info!("Setup RCC... ");
let rcc = dp.RCC.constrain();
let ccdr = rcc.sys_ck(160.MHz()).freeze(pwrcfg, &dp.SYSCFG);
let gpioc = dp.GPIOC.split(ccdr.peripheral.GPIOC);
let tx = gpioc.pc10.into_alternate();
let rx = gpioc.pc11.into_alternate();
info!("");
info!("stm32h7xx-hal example - USART");
info!("");
let config = serial::config::Config::new(19_200.bps())
.invertrx(true)
.inverttx(true);
let serial = dp
.USART3
.serial((tx, rx), config, ccdr.peripheral.USART3, &ccdr.clocks)
.unwrap();
let (mut tx, mut rx) = serial.split();
writeln!(tx, "Hello, world!").unwrap();
loop {
let received = block!(rx.read()).unwrap();
asm::delay(1000);
info!("rx {}", received as char);
block!(tx.write(received)).ok();
}
}