Module lpc82x_hal::usart

API for USART

The entry point to this API is USART. Currently, only some limited UART functionality is implemented.

The USART peripheral is described in the user manual, chapter 13.

Examples

use lpc82x_hal::prelude::*;
use lpc82x_hal::Peripherals;
use lpc82x_hal::usart::{
    BaudRate,
    USART,
};

let mut p = Peripherals::take().unwrap();

let mut syscon = p.syscon.split();
let mut swm    = p.swm.split();

// Set baud rate to 115200 baud
// Please refer to the USART example in the repository for a full
// explanation of this value.
syscon.uartfrg.set_clkdiv(6);
syscon.uartfrg.set_frgmult(22);
syscon.uartfrg.set_frgdiv(0xff);
let baud_rate = BaudRate::new(&syscon.uartfrg, 0);

let (u0_rxd, _) = swm.movable_functions.u0_rxd.assign(
    swm.pins.pio0_0.into_swm_pin(),
    &mut swm.handle,
);
let (u0_txd, _) = swm.movable_functions.u0_txd.assign(
    swm.pins.pio0_4.into_swm_pin(),
    &mut swm.handle,
);

// Initialize USART0. This should never fail, as the only reason `init`
// returns a `Result::Err` is when the transmitter is busy, which it
// shouldn't be right now.
let mut serial = p.usart0
    .enable(
        &baud_rate,
        &mut syscon.handle,
        u0_rxd,
        u0_txd,
    )
    .expect("UART initialization shouldn't fail");

// Use a blocking method to write a string
serial.bwrite_all(b"Hello, world!");

Please refer to the examples in the repository for more example code.

Structs

BaudRate	Represents a UART baud rate
USART	Interface to a USART peripheral

Enums

Error

A USART error

Traits

Peripheral

Internal trait for USART peripherals