pcd8544 0.2.0

Implementation to communicate and write to PCD8544 using embedded_hal as abstraction layer. WIP
Documentation 
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use embedded_hal::digital::v2;
use pcd8544::PCD8544;
use std::convert::Infallible;
use std::fmt::Write;

pub struct DummyOutputPin;

impl v2::OutputPin for DummyOutputPin {
    type Error = Infallible;
    fn set_low(&mut self) -> Result<(), Self::Error> {
        Ok(())
    }

    fn set_high(&mut self) -> Result<(), Self::Error> {
        Ok(())
    }
}

fn main() {
    let pcd_light = DummyOutputPin;
    let pcd_clk = DummyOutputPin;
    let pcd_din = DummyOutputPin;
    let pcd_dc = DummyOutputPin;
    let pcd_ce = DummyOutputPin;
    let pcd_rst = DummyOutputPin;

    let mut display = PCD8544::new(pcd_clk, pcd_din, pcd_dc, pcd_ce, pcd_rst, pcd_light)
        .expect("Infallible cannot fail");

    display.reset().expect("Infallible cannot fail");
    writeln!(display, "Hello World").unwrap();
}