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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.
use futures::stream::StreamExt;
use gpio_cdev::{AsyncLineEventHandle, Chip, EventRequestFlags, LineRequestFlags};
use structopt::StructOpt;
#[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,
}
async fn do_main(args: Cli) -> std::result::Result<(), gpio_cdev::Error> {
let mut chip = Chip::new(args.chip)?;
let line = chip.get_line(args.line)?;
let mut events = AsyncLineEventHandle::new(line.events(
LineRequestFlags::INPUT,
EventRequestFlags::BOTH_EDGES,
"gpioevents",
)?)?;
loop {
match events.next().await {
Some(event) => println!("{:?}", event?),
None => break,
};
}
Ok(())
}
#[tokio::main]
async fn main() {
let args = Cli::from_args();
do_main(args).await.unwrap();
}
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