lcd 0.4.1

Hitachi HD44780-compatible LCD screen support for embedded development
Documentation 
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#[macro_use]
extern crate pretty_assertions;
extern crate lcd;

mod util;

use lcd::{FunctionDots, FunctionLine, FunctionMode};

#[test]
fn init_4bit() {
    let input = vec![0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];

    let vec = util::test(FunctionMode::Bit4, Some(input), |lcd| {
        lcd.init(FunctionLine::Line2, FunctionDots::Dots5x8);
    });
    assert_eq!(
        vec,
        vec![
            // Send init command three times
            "R/S false",
            "DATA 0b0011",
            "EN true",
            "DELAY 1",
            "EN false",
            "DELAY 4500",
            "EN true",
            "DELAY 1",
            "EN false",
            "DELAY 150",
            "EN true",
            "DELAY 1",
            "EN false",
            // Check busy
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            // Switch to 4-bit mode
            "DATA 0b0010",
            "EN true",
            "DELAY 1",
            "EN false",
            // Check busy
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            // Set lines, font size
            "R/S false",
            "DATA 0b0010",
            "EN true",
            "DELAY 1",
            "EN false",
            "DATA 0b1000",
            "EN true",
            "DELAY 1",
            "EN false",
            // Check busy
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            // Display
            "R/S false",
            "DATA 0b0000",
            "EN true",
            "DELAY 1",
            "EN false",
            "DATA 0b1000",
            "EN true",
            "DELAY 1",
            "EN false",
            // Check busy
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            // Clear
            "R/S false",
            "DATA 0b0000",
            "EN true",
            "DELAY 1",
            "EN false",
            "DATA 0b0001",
            "EN true",
            "DELAY 1",
            "EN false",
            // Check busy
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            // FIXME: no harm, but should not really wait for busy again...
            // Check busy again
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            // Entry mode
            "R/S false",
            "DATA 0b0000",
            "EN true",
            "DELAY 1",
            "EN false",
            "DATA 0b0110",
            "EN true",
            "DELAY 1",
            "EN false",
            // Check busy
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false"
        ]
    );
}

#[test]
fn write_4bit() {
    let input = vec![0, 0];
    let vec = util::test(FunctionMode::Bit4, Some(input), |lcd| {
        lcd.write(b'a');
    });
    assert_eq!(
        vec,
        vec![
            "R/S true",
            "DATA 0b0110",
            "EN true",
            "DELAY 1",
            "EN false",
            "DATA 0b0001",
            "EN true",
            "DELAY 1",
            "EN false",
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            "DELAY 5"
        ]
    );
}

#[test]
fn write_8bit() {
    let input = vec![0];
    let vec = util::test(FunctionMode::Bit8, Some(input), |lcd| {
        lcd.write(b'a');
    });
    assert_eq!(
        vec,
        vec![
            "R/S true",
            "DATA 0b01100001",
            "EN true",
            "DELAY 1",
            "EN false",
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            "DELAY 5"
        ]
    );
}

#[test]
fn write_4bit_long_busy() {
    let input = vec![8, 0, 8, 0, 8, 0, 0, 0];
    let vec = util::test(FunctionMode::Bit4, Some(input), |lcd| {
        lcd.write(b'a');
    });
    assert_eq!(
        vec,
        vec![
            "R/S true",
            "DATA 0b0110",
            "EN true",
            "DELAY 1",
            "EN false",
            "DATA 0b0001",
            "EN true",
            "DELAY 1",
            "EN false",
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            "DELAY 5"
        ]
    );
}

#[test]
fn write_8bit_long_busy() {
    let input = vec![128, 128, 128, 0];
    let vec = util::test(FunctionMode::Bit8, Some(input), |lcd| {
        lcd.write(b'a');
    });
    assert_eq!(
        vec,
        vec![
            "R/S true",
            "DATA 0b01100001",
            "EN true",
            "DELAY 1",
            "EN false",
            "R/S false",
            "RW true",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "EN true",
            "DELAY 1",
            "IS BUSY?",
            "DELAY 1",
            "EN false",
            "RW false",
            "DELAY 5"
        ]
    );
}