一、用cargo创建新工程

命令：cargo new comport

use std::env;
use std::{thread, time};
use serialport::{DataBits, StopBits, Parity, FlowControl};
use std::io::{self, Read, Write};
use std::time::Duration;

fn main() -> io::Result<()> {

    let mut args: Vec<String> = env::args().collect();
    if args.len() < 1+3 {
        println!("{} ComPort Baudrate Command FindString [DelayMS]",args[0]);
        std::process::exit(-1);
    }

    let mut offset: usize;
    let mut duration: u64 = 100;
    if args.len() > 1+3+1 {
        duration = args[args.len()-1].parse::<u64>().unwrap();
    }

    let mut port = serialport::new(&args[1], args[1+1].parse::<u32>().unwrap())
    .data_bits(DataBits::Eight)
    .stop_bits(StopBits::One)
    .parity(Parity::None)
    .flow_control(FlowControl::None)
    .timeout(Duration::from_secs(1))
    .open()?;

    offset = 1+1+1;
    args[offset]=args[offset].replace("\\r", "\r");
    args[offset]=args[offset].replace("\\n", "\n"); 
    let data = &args[offset];
    port.write_all(data.as_bytes())?;

    thread::sleep(time::Duration::from_millis(duration));
    let mut buffer: Vec<u8> = vec![0; 80000000];
    let bytes_read = port.read(buffer.as_mut_slice())?;
    let received_data = String::from_utf8_lossy(&buffer[..bytes_read]);
    println!("Received: {}", received_data);

    offset=1+3;
    if args.len() > offset && args[offset].len() != 0 {
        if received_data.contains(&args[offset]) {
            println!("Return=OK");
        }else{
            println!("Return=ERROR");
        }
    }

    Ok(())
}