Mikroelektronika MIKROE-742 데이터 시트

The mikroPascal PRO for AVR provides a library for handling Manchester coded sig-
nals. The Manchester code is a code in which data and clock signals are combined
to form a single self-synchronizing data stream; each encoded bit contains a transi-
tion at the midpoint of a bit period, the direction of transition determines whether the
bit is 0 or 1; the second half is the true bit value and the first half is the complement
of the true bit value (as shown in the figure below).

Notes: The Manchester receive routines are blocking calls (Man_Receive_Init and
Man_Synchro). This means that MCU will wait until the task has been performed
(e.g. byte is received, synchronization achieved, etc).

Note: Manchester code library implements time-based activities, so interrupts need
to be disabled when using it.

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

var MANRXPIN : sbit;
sfr; external;

Receive line.

var MANRXPIN : sbit
at PINB.B0;

var MANTXPIN : sbit;
sfr; external;

Transmit line.

var MANTXPIN : sbit
at PORTB.B1;

var
MANRXPIN_Direction :
sbit; sfr; external;

Direction of the Receive pin.

var
MANRXPIN_Direction :
sbit at DDRB.B0;

var
MANTXPIN_Direction :
sbit; sfr; external;

Direction of the Transmit pin.

var
MANTXPIN_Direction :
sbit at DDRB.B1;