gpio-cdev 0.3.0

Linux GPIO Character Device Support (/dev/gpiochipN)
Documentation 
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// Copyright (c) 2018 The rust-gpio-cdev Project Developers.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

extern crate gpio_cdev;
#[macro_use]
extern crate quicli;

use gpio_cdev::*;
use quicli::prelude::*;

#[derive(Debug, StructOpt)]
struct Cli {
    /// The gpiochip device (e.g. /dev/gpiochip0)
    chip: String,
    /// The offset of the GPIO line for the provided chip
    line: u32,
}

fn do_main(args: Cli) -> std::result::Result<(), errors::Error> {
    let mut chip = Chip::new(args.chip)?;
    let handle = chip
        .get_line(args.line)?
        .request(LineRequestFlags::INPUT, 0, "readinput")?;
    println!("Value: {:?}", handle.get_value()?);

    Ok(())
}

main!(|args: Cli| match do_main(args) {
    Ok(()) => {}
    Err(e) => {
        println!("Error: {:?}", e);
    }
});