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lib/Device/FTDI/MPSSE.pm  view on Meta::CPAN

=head2 read_bytes

=head2 readwrite_bytes

    $mpsse->write_bytes( $data_out )->get

    $data_in = $mpsse->read_bytes( $len )->get

    $data_in = $mpsse->readwrite_bytes( $data_out )->get

Perform a bytewise clocked serial transfer. These are the "main" methods of
the class; they invoke the main core of the MPSSE.

In each case, the C<CLK> pin will count the specified length of bytes of
transfer. For the C<write_> and C<readwrite_> methods this count is implied by
the length of the inbound buffer; during the operation the specified bytes
will be sent out of the C<DO> pin.

For the C<read_> and C<readwrite_> methods, the returned future will yield the
bytes that were received in the C<DI> pin during this time.

lib/Device/FTDI/MPSSE.pm  view on Meta::CPAN

=head2 read_bits

=head2 readwrite_bits

    $mpsse->write_bits( $bitlen, $bits_out )->get

    $bits_in = $mpsse->read_bits( $bitlen )->get

    $bits_in = $mpsse->readwrite_bits( $bitlen, $bits_out )->get

Performs a bitwise clocked serial transfer of between 1 and 8 single bits.

In each case, the C<CLK> pin will count the specified length of bits of
transfer.

For the C<write_> and C<readwrite_> methods individal bits of the given byte
will be clocked out of the C<DO> pin. In C<MSBFIRST> mode, this will start
from the highest bit of the byte; in C<LSBFIRST> mode, this will start from
the lowest. The remaining bits will be ignored.

For the C<read_> and C<readwrite_> methods, the returned future will yield
the bits that were received in the C<DI> pin during this time. In C<MSBFIRST>
mode, the bits returned by the chip will start from the highest bit of the
byte; in C<LSBFIRST> they will start from the lowest. The other bits will be
set to zero.

=cut

lib/Device/FTDI/MPSSE.pm  view on Meta::CPAN

    my $self = shift;
    my ( $on ) = @_;

    $self->_send_bytes( pack "C", $on ? CMD_CLKDIV5_ON : CMD_CLKDIV5_OFF );
}

=head2 set_3phase_clock

    $mpsse->set_3phase_clock( $on )->get

If enabled, data is clocked in/out using a 3-phase strategy compatible with
the I2C protocol. If this is set, the effective clock rate becomes 2/3 that
implied by the clock divider.

=cut

sub set_3phase_clock
{
    my $self = shift;
    my ( $on ) = @_;