1 // Copyright (c) 2018 The rust-gpio-cdev Project Developers.
2 //
3 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
4 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
5 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
6 // option. This file may not be copied, modified, or distributed
7 // except according to those terms.
8
9 use gpio_cdev::{Chip, EventRequestFlags, LineRequestFlags};
10 use quicli::prelude::*;
11 use structopt::StructOpt;
12
13 #[derive(Debug, StructOpt)]
14 struct Cli {
15 /// The gpiochip device (e.g. /dev/gpiochip0)
16 chip: String,
17 /// The offset of the GPIO line for the provided chip
18 line: u32,
19 }
20
do_main(args: Cli) -> std::result::Result<(), gpio_cdev::Error>21 fn do_main(args: Cli) -> std::result::Result<(), gpio_cdev::Error> {
22 let mut chip = Chip::new(args.chip)?;
23 let line = chip.get_line(args.line)?;
24
25 for event in line.events(
26 LineRequestFlags::INPUT,
27 EventRequestFlags::BOTH_EDGES,
28 "gpioevents",
29 )? {
30 println!("{:?}", event?);
31 }
32
33 Ok(())
34 }
35
main() -> CliResult36 fn main() -> CliResult {
37 let args = Cli::from_args();
38 do_main(args).or_else(|e| {
39 error!("{:?}", e);
40 Ok(())
41 })
42 }
43