const DISP_I2C_ADDR: u8 = 112;

    let freq: Hertz = 20.khz().into();

    let mut i2c2 = blocking_i2c(
        I2c::i2c2(
            device.I2C2, 
            (scl_pin, sda_pin),
            Mode::Standard { frequency: freq.0 },
            clocks,
            &mut rcc.apb1,
        ),
        clocks,
        500,
        2,
        500,
        500,
    );

    let mut ht16k33 = HT16K33::new(i2c2, DISP_I2C_ADDR);
    ht16k33.initialize().expect("Failed to initialize ht16k33");

    // Sending individual digits
    ht16k33.update_buffer_with_digit(Index::One, 1);
    ht16k33.update_buffer_with_digit(Index::Two, 2);
    ht16k33.update_buffer_with_digit(Index::Three, 3);
    ht16k33.update_buffer_with_digit(Index::Four, 4);

    // Sending ascii
    ht16k33.update_buffer_with_char(Index::One, AsciiChar::new('A'));
    ht16k33.update_buffer_with_char(Index::Two, AsciiChar::new('B'));

    // Setting the decimal point 
    ht16k33.update_buffer_with_dot(Index::Two, true);

    // Formatting a float using the whole display
    ht16k33.update_buffer_with_float(Index::One, -3.14, 2, 10).unwrap();

    // Putting a character in front of a float
    ht16k33.update_buffer_with_char(Index::One, AsciiChar::new('X'));
    ht16k33.update_buffer_with_float(Index::Two, -3.14, 2, 10).unwrap(); //Display will read "X-3.1"

    // This will panic because there aren't enough digits to display this number
    ht16k33.update_buffer_with_float(Index::One, 12345., 0, 10).expect("Oops"); 

    // Note: none of the above methods actually commit the buffer to the display, call write_display_buffer to actually send it to the display
    ht16k33.write_display_buffer().unwrap()