| // 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(); |
| } |