|<--------- 16-bit config register ---------->|
    |                             |               |
    |---------------------------------------------|
    |                             |               |
    |                             |               |
    |<------Byte 1: Control------>|<-Byte0: Data->|
    |                             |               |
    |-----------------------------|---------------|
    | 15 | 14 13 | 12 11 | 10 9 8 | 7 6 5 4 3 2 1 |
      __   _____   _____   ______   _____________
      ^      ^       ^        ^          ^
      |      |       |        |          |
    START    |       |      UNUSED      DATA
          CHANNEL    |
                  PIN SELECT

##</code><code>##

    15:     Start conversation
             0 - do nothing
             1 - start conversation

    14-13:  Channel selection
            00 - channel 0
            01 - channel 1
            11 - both channels

    12-11: Pin selection
            00 - no pin
            01 - pin 1
            11 - pin 2

    10-8:   Unused (Don't care bits)

    7-0:    Data

##</code><code>##

    my $data = bit_on(0, 15);

##</code><code>##

    say bit_count($data);
    say bit_bin($data);

##</code><code>##

    16
    1000000000000000

##</code><code>##

    # setting channel

    $data = bit_set($data, 13, 2, 0b11);

    # result: 1110000000000000

##</code><code>##

    # setting pin

    $data = bit_set($data, 11, 2, 0b01);

    # result: 1110100000000000

##</code><code>##

    # setting data

    $data = bit_set($data, 0, 8, 186);

    # or: bit_set($data, 0, 8, 0b10111010);

    # result: 1110100010111010

##</code><code>##

    $data = bit_off($data, 14);

    # result: 1010100010111010

##</code><code>##

    my $value = bit_get($data, 15, 15);
    say bit_bin($value);

    # result: 1

##</code><code>##

    # data

    # (note no LSB param. We're reading from bit 7 through to 0).
    # since we readily know the data value in decimal (186), we don't 
    # need to worry about the binary representation

    say bit_get($data, 7);

    # result 186

    # channel

    say bit_bin(bit_get($data, 14, 13));

    # result 1

    # pin select

    say bit_bin(bit_get($data, 12, 11));

    # result 1

    # ensure the unused bits weren't set

    say bit_get($data, 10, 8);

##</code><code>##


# use a binary number directly:

say 0b101; # 5

# format a number into a binary string, and print it

printf("%b\n", 254); # 11111110

# convert a number to a binary string, and assign it

my $bin = sprintf("%b", 127); # 1111111