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README  view on Meta::CPAN

    Switches the digit into BCD mode if not already so.

 write_raw

       await $chip->write_raw( $digit, $bits );

    Writes the value at the given digit, setting the raw column lines to
    the 8-bit value given.

    Switches the digit into undecoded raw mode if not already so.

 write_hex

       await $chip->write_hex( $digit, $val );

    Similar to write_bcd, but uses a segment decoder written in code rather
    than on the chip itself, to turn values into sets of segments to
    display. This makes it capable of displaying the letters A to F, in
    addition to numbers, - and space.

lib/Device/Chip/MAX7219.pm  view on Meta::CPAN

   await $self->_writereg( REG_DIGIT+$digit, $val + ( $dp ? 0x80 : 0 ) );
}

=head2 write_raw

   await $chip->write_raw( $digit, $bits );

Writes the value at the given digit, setting the raw column lines to the 8-bit
value given.

Switches the digit into undecoded raw mode if not already so.

=cut

async method write_raw ( $digit, $bits )
{
   $digit >= 0 and $digit <= 7 or
      croak "Digit must be 0 to 7";

   my $decodemask = 1 << $digit;