industrial-io 0.3.0

Linux Industrial I/O (IIO) Support
Documentation 
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// industrial-io/src/bin/iio_info_rs.rs
//
// Copyright (c) 2018, Frank Pagliughi
//
// Licensed under the MIT license:
//   <LICENSE or http://opensource.org/licenses/MIT>
// This file may not be copied, modified, or distributed except according
// to those terms.
//

//! Rust application to gather information about Industrial I/O devices.
//!

extern crate industrial_io as iio;

use std::process;

fn main() -> iio::Result<()> {
    let lib_ver = iio::library_version();
    println!("Library version: {:?}", lib_ver);

    let ctx = iio::Context::new().unwrap_or_else(|err| {
        eprintln!("Error getting the IIO Context: {}", err);
        process::exit(1);
    });

    println!("Description: {}", ctx.description());

    println!("{} context attribute(s) found", ctx.num_attrs());
    for attr in ctx.attributes() {
        println!("\t{}: {}", attr.0, attr.1)
    }

    println!("IIO context has {} device(s):", ctx.num_devices());
    for dev in ctx.devices() {
        //assert_eq(ctx, dev.context());
        println!(
            "\t{}: {}",
            dev.id().unwrap_or_default(),
            dev.name().unwrap_or_else(|| "<unknown>".to_string())
        );
        println!("\t\t{} channels found:", dev.num_channels());

        for chan in dev.channels() {
            println!("\t\t\t{}", chan.id().unwrap_or_default());
            println!(
                "\t\t\t{} channel-specific attributes found:",
                chan.num_attrs()
            );

            // Note: We could get all the attr into a map and then print
            //let attrs = chan.attr_read_all();

            for attr in chan.attrs() {
                print!("\t\t\t\t'{}': ", attr);
                if let Ok(val) = chan.attr_read_float(&attr) {
                    println!("{}", val);
                }
                else if let Ok(val) = chan.attr_read_int(&attr) {
                    println!("{}", val);
                }
                else if let Ok(val) = chan.attr_read_bool(&attr) {
                    println!("{}", val);
                }
                else {
                    println!("{}", chan.find_attr(&attr).unwrap());
                }
            }
        }
    }

    Ok(())
}