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, 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 and value of each GPIO line for the provided chip
18 /// in the form "off=<0|1>"
19 line_values: Vec<String>,
20 }
21
22 // Use like:
23 // muiltioutput /dev/gpiochip0 0=1 1=1 2=0 3=1 4=0
24 //
25 // to set lines 0, 1, & 3 high
26 // 2 & 4 low
27 //
do_main(args: Cli) -> std::result::Result<(), gpio_cdev::Error>28 fn do_main(args: Cli) -> std::result::Result<(), gpio_cdev::Error> {
29 let mut chip = Chip::new(args.chip)?;
30 let mut offsets = Vec::new();
31 let mut values = Vec::new();
32
33 for arg in args.line_values {
34 let lv: Vec<&str> = arg.split("=").collect();
35 offsets.push(lv[0].parse::<u32>().unwrap());
36 values.push(lv[1].parse::<u8>().unwrap());
37 }
38
39 // NOTE: we set the default values to the desired states so
40 // setting them separately is not required
41 let _handle =
42 chip.get_lines(&offsets)?
43 .request(LineRequestFlags::OUTPUT, &values, "multioutput")?;
44
45 println!("Output lines being driven... Enter to exit");
46 let mut buf = String::new();
47 ::std::io::stdin().read_line(&mut buf)?;
48
49 Ok(())
50 }
51
main() -> CliResult52 fn main() -> CliResult {
53 let args = Cli::from_args();
54 do_main(args).or_else(|e| {
55 error!("{:?}", e);
56 Ok(())
57 })
58 }
59