Mikroelektronika MIKROE-742 데이터 시트

297

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

function Ow_Read(): byte;

Data read from an external device over the OneWire bus.

Reads one byte of data via the OneWire bus.

Devices compliant with the Dallas OneWire protocol.

Global variables : 

- 

OW_Bit_Read

: OneWire read line 

- 

OW_Bit_Write

: OneWire write line. 

- 

OW_Bit_Direction

: Direction of the OneWire pin 

must be defined before using this function.

// OneWire pinout
var OW_Bit_Read : sbit at PINB.B2;     
var OW_Bit_Write : sbit at PORTB.B2;   
var OW_Bit_Direction : sbit at DDRB.B2;
// end of OneWire pinout

// Read a byte from the One-Wire Bus
var read_data : byte;

...

read_data := Ow_Read();