Advantech PCI-1682U Manual de usuario descargar pdf (Pagina 34)

PCI-1680U/1682U User Manual 28

Parameters

Return Value

Successful, return effective HANDLE. Unsuccessful, return

INVALID_HANLDLE_VALUE.

Example

Synchronous open CAN1:

HANDLE hDevice = CreateFile(

"\\\\.\\CAN1",

GENERIC_READ | GENERIC_WRITE,

NULL,

OPEN_EXISTING,

FILE_ATTRIBUTE_NORMAL,

NULL);

Asynchronous open CAN1£½

HANDLE hDevice = CreateFile(

"\\\\.\\CAN1",

GENERIC_READ | GENERIC_WRITE,

NULL,

OPEN_EXISTING,

FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,

NULL);

Name Direction Description

lpFileName Input

Name of device which was opened, such as

\\\\.\\CAN1. *Note In WINDOWS CE,use CAN1:.

ldwDesiredAccess Input

Ways of opening the port, which is usually

GENERIC_READ | GENERIC_WRITE.

dwShareMode Input Does not support share open. It must be set to 0.

lpSecurityAttributes Input NULL.

dwCreationDisposition Input OPEN_EXISTING.

dwFlagsAndAttributes Input

Synchronous open: FILE_ATTRIBUTE_NORMAL.

Asynchronous open:

FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAP

PED.

hTemplateFile Input NULL.

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Advantech PCI-1682U Manual de usuario Pagina 34