Rockwell-automation 1747-PCIS API Software - Open Controller Manual de usuario descargar pdf (Pagina 128)

Publication 1747-UM002A-US-P - June 2000

6-68 Library of Routines

OC_WaitForDII

Blocks the calling thread until a DII interrupt is received from the

scanner or

msTimeout milliseconds have elapsed.

Syntax:

int OC_WaitForDII(HANDLE handle, DWORD msTimeout)

Parameters:

Description:

If a DII has been received since the last OCMSG_DIINT message was

retrieved with the OC_PollScanner function, OC_WaitForDII returns

SUCCESS immediately.

Return Value:

Considerations:

Supported in the Windows NT API library only.

Example:

HANDLE handle; intrc;

MSGBUF diiMSG

/* Wait for 10 seconds for a DII */

rc = OC_WaitForDII(handle, 10000);

switch(rc) {

case SUCCESS: /* got a DII */

/* fetch the DII message */

OC_PollScanner (handle,OCMSG_DIINT,&diiMSG);

break;

case ERR_OCRESPONSE:/* timed out */

printf(“\nTimed out waiting for DII\n”);

break;

default;

printf(“\nError!\n”);

break;

}

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

msTimeout Specifies the number of milliseconds to wait

Set to INFINITE to wait forever

Name: Value: Description:

SUCCESS 0 a DII was received

ERR_RESPONSE 10

msTimeout milliseconds elapsed without a DII

ERR_OCACCESS 2

handle does not have access to scanner

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 ... 173 174

Comentarios a estos manuales

Sin comentarios

Rockwell-automation 1747-PCIS API Software - Open Controller Manual de usuario Pagina 128

Comentarios a estos manuales

Relacionado con productos y manuales para Equipo Rockwell-automation 1747-PCIS API Software - Open Controller