hd44780-controller 0.1.0-alpha.2

HD44780 LCD controller with async/sync support for embedded-hal
Documentation 
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pub trait Charset {
    fn char_to_code(&self, c: char) -> Option<u8>;
}

pub trait InfallibleCharset {
    fn char_to_code(&self, c: char) -> u8;
}

pub struct BlankFallback<C: Charset>(pub C);
pub struct QuestionFallback<C: Charset>(pub C);

impl<C: Charset> InfallibleCharset for BlankFallback<C> {
    fn char_to_code(&self, c: char) -> u8 {
        self.0.char_to_code(c).unwrap_or(b' ')
    }
}

impl<C: Charset> InfallibleCharset for QuestionFallback<C> {
    fn char_to_code(&self, c: char) -> u8 {
        self.0.char_to_code(c).unwrap_or(b'?')
    }
}