Mikroelektronika MIKROE-350 Fiche De Données

The mikroBasic 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

dim MANRXPIN as sbit
sfr external

Receive line.

dim MANRXPIN as sbit
at PINB.B0

dim MANTXPIN as sbit
sfr external

Transmit line.

dim MANTXPIN as sbit
at PORTB.B1

dim
MANRXPIN_Direction 

Direction of the Receive
pin.

dim
MANRXPIN_Direction 

sbit at DDRB.B0

dim
MANTXPIN_Direction 

Direction of the Transmit
pin.

dim
MANTXPIN_Direction 

sbit at DDRB.B1