wave-insight-lib 0.1.3

fn lut(d:u8)->[&u8;4]{
    // d >15, d is invalid
    let table = [
        ['0','0','0','0'],
        ['0','0','0','1'],
        ['0','0','1','0'],
        ['0','0','1','1'],

        ['0','1','0','0'],
        ['0','1','0','1'],
        ['0','1','1','0'],
        ['0','1','1','1'],

        ['1','0','0','0'],
        ['1','0','0','1'],
        ['1','0','1','0'],
        ['1','0','1','1'],

        ['1','1','0','0'],
        ['1','1','0','1'],
        ['1','1','1','0'],
        ['1','1','1','1'],


    ]
}