Node / public / precursor-lxmfchat.git / files / xous-core / services / shellchat / src / cmds / backlight.rs

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use String;

use crate::{CommonEnv, ShellCmdApi};

#[derive(Debug)]

pub struct Backlight {}

impl<'a> ShellCmdApi<'a> for Backlight {

cmd_api!(backlight);

// inserts boilerplate for command API

fn process(&mut self, args: String, env: &mut CommonEnv) -> Result<Option<String>, xous::Error> {

use core::fmt::Write;

let mut ret = String::new();

let helpstring = "backlight [on] [off] [0-5]";

let mut tokens = args.split(' ');

if let Some(sub_cmd) = tokens.next() {

// note that the secondary backlight appears brighter, so generally, we want to set it to a lower

// setting to save battery power

match sub_cmd {

"on" => {

env.com.set_backlight(255, 255).unwrap();

write!(ret, "backlight set to 100%").unwrap();

}

"off" => {

env.com.set_backlight(0, 0).unwrap();

write!(ret, "backlight turned off").unwrap();

}

"0" => {

env.com.set_backlight(0, 0).unwrap();

write!(ret, "backlight 0").unwrap();

}

"1" => {

env.com.set_backlight(32, 32).unwrap();

write!(ret, "backlight 1").unwrap();

}

"2" => {

env.com.set_backlight(96, 48).unwrap();

write!(ret, "backlight 2").unwrap();

}

"3" => {

env.com.set_backlight(128, 64).unwrap();

write!(ret, "backlight 3").unwrap();

}

"4" => {

env.com.set_backlight(196, 96).unwrap();

write!(ret, "backlight 4").unwrap();

}

"5" => {

env.com.set_backlight(255, 128).unwrap();

write!(ret, "backlight 5").unwrap();

}

_ => {

write!(ret, "{}", helpstring).unwrap();

}

}

} else {

write!(ret, "{}", helpstring).unwrap();

}

Ok(Some(ret))

}

}