Struct manchester_code::Decoder

pub struct Decoder { /* private fields */ }

Decode a Manchester encoded stream of periodically taken samples into a datagram.

Implementations

impl Decoder

pub const fn new(
    inactivity_level: InactivityLevel,
    first_bit_expectation: FirstBitExpectation,
    bit_order: BitOrder
) -> Self

Create an instance of a new manchester encoder

Arguments

• high_inactivity - A true value expects the input pin state high when nothing is received
• first_bit_is_one - A *true value enforces the bit recording to start with a “1”. This is important to know upfront where a new bit starts
• bit_order - Either BigEndian (MSP is received first) or LittleEndian (LSB is received first)

pub fn next(&mut self, sample: bool) -> Option<Datagram>

Sample a manchester modulated signal periodically and extract datagrams

To cover some jitter the sampling rate is three times the half bit frequency i.e. an Infrared manchester decoded bit lasts 2x 889 us), Thus sampling period should be 296 us.

Note: three times the bit frequency is good enough to consider the Nyquist criterion and some potential jitter in sending frequency.

Arguments

• sample - the level of the pin true equals high, false equals low

Returns

Option of an infrared datagram

• None - if no complete datagram is received
• Some(datagram) - a completely received datagram