MikroElektronika PIC Microcontrollers PIC16 Manual do Utilizador descarregar pdf (Página 113)

1-wire library provides routines for communicating via 1-wire bus, for example

with DS1820 digital thermometer.

Note that oscillator frequency Fosc needs to be at least 4MHz in order to use the

routines with Dallas digital thermometers.

function ow_reset(dim byref PORT as byte, dim PIN as byte) as byte

function ow_read(dim byref PORT as byte, dim PIN as byte) as byte

procedure ow_write(dim byref PORT as byte, dim PIN, par as byte)

function ow_reset(dim byref PORT as byte, dim PIN as byte) as byte

Issues 1-wire reset signal for DS1820.

Parameters PORT and pin specify the location of DS1820; return value of the

function is 0 if DS1820 is present, and 1 if it is not present.

function ow_read(dim byref PORT as byte, dim PIN as byte) as byte

Reads one byte via 1-wire bus.

procedure ow_write(dim byref PORT as byte, dim PIN, par as byte)

Writes one byte (parameter par) via 1-wire bus.

The following code demonstrates use of 1-wire library procedures and functions.

The example reads the temperature using DS1820 connected to PORTD, pin 7. Be

sure to set the Fosc appropriately in your project.

mikroBASIC

- Basic Compiler for Microchip PIC microcontrollers

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mikroBASIC

MikroElektronika: Development tools - Books - Compilers

1-Wire Library

Example

Routines

making it simple...

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