CODEWITHSUNDEEP
rustserial-port
andber1
andber1

Reputation: 194

How to use read_line function with Rust's serialport crate

I am working with the serialport crate on a raspberry. The given example with port.read works fine. However port.read_to_end or port.read_to_string does not work, I get a timeout. Can anybody explain this behavior? The two functions read all bytes until EOF. I am sending test strings with null termination.

I am more interested in a read_line function. But this is not directly supported with the serialport crate, is it? Can I use the BufRead trait for this?

Upvotes: 2

Views: 3486

Answers (1)

andber1
andber1

Reputation: 194

Here a minimal example with read_line. Works when TX and RX are connected.

use serialport;
use std::time::Duration;
use std::io::BufReader;
use std::io::BufRead;

fn main() {
    let mut serial_port = serialport::new("/dev/serial0", 9600)
        .timeout(Duration::from_millis(1000))
        .open()
        .expect("Failed to open serial port");

    let output = "This is a test.\n".as_bytes();
    serial_port.write(output).expect("Write failed!");
    serial_port.flush().unwrap();

    let mut reader = BufReader::new(serial_port);
    let mut my_str = String::new();
    reader.read_line(&mut my_str).unwrap();

    println!("{}", my_str);
}

Upvotes: 3

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