Echelon Neuron C Manual do Utilizador descarregar pdf (Página 90)

70 Functions

Syntax

type

abs (

);

Example

int i;

long l;

void f(void)

{

i = abs(-3);

l = abs(-300);

}

access_address( ) Function

The access_address( ) function returns a const pointer to the address structure

that corresponds to the index parameter. This pointer can be stored, used to

perform a structure copy, or used in other ways common to C pointers, except

that the pointer cannot be used for writes.

See the ISO/IEC 14908 (ANSI/EIA/CEA-709.1)

Control Network Specification

for

a description of the data structure.

Syntax

#include <access.h>

const address_struct *access_address (int

index

);

Example

#include <access.h>

address_struct addr_copy;

void f(void)

{

addr_copy = *(access_address(2));

}

access_alias( ) Function

The access_alias( ) function returns a const pointer to the alias structure that

corresponds to the index parameter. This pointer can be stored, used to perform

a structure copy, or used in other ways common to C pointers, except that the

pointer cannot be used for writes.

The Neuron 3120 Chip with version 4 firmware does not support aliasing.

See the ISO/IEC 14908 (ANSI/EIA/CEA-709.1)

Control Network Specification

for

a description of the data structure.

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