examples/power.rs


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//! Change the supply's output state.

use std::env;

use bkp_168xb::{Output, PowerSupply};

static USAGE: &'static str = "Usage: power on [PORT] | power off [PORT]";

fn main() {
    let mut args = env::args().skip(1);
    let output = args
        .next()
        .and_then(|arg| match arg.to_lowercase().as_str() {
            "off" => Some(Output::Off),
            "on" => Some(Output::On),
            _ => None,
        })
        .expect(USAGE);
    let port = args.next().expect(USAGE);

    let mut ps = PowerSupply::open(port).unwrap();
    let (volt, curr) = ps.get_max_voltage_current().unwrap();
    println!("{volt} {curr}");
    ps.set_output(output).unwrap()
}