National Instruments NI-488.2 ユーザーズマニュアル

This example shows you how to use 

FindRQS

 to find the first device that 

is requesting service:

void GetASerialPollResponse ( char *DevicePad, 

  char *DeviceResponse )

{

char SerialPollResponse = 0;

int WaitResult;

Addr4882_t Addrlist[4] = {3,4,5,NOADDR};

WaitSRQ (0, &WaitResult);

if (WaitResult) {

printf ("SRQ is asserted.\n");

FindRQS ( 0, AddrList, &SerialPollResponse );

if (!(ibsta & ERR))  {

printf ("Device at pad %x returned byte

%x.\n", AddrList[ibcnt],(int) 

SerialPollResponse);

*DevicePad = AddrList[ibcnt];

*DeviceResponse = SerialPollResponse;

}

}

return;

}

This example shows you how to use 

AllSpoll

 to serial poll three devices 

with a single call:

void GetAllSerialPollResponses ( Addr4882_t AddrList[], 

short ResponseList[] )

{

int WaitResult;

WaitSRQ (0, &WaitResult);

if ( WaitResult ) {

printf ( "SRQ is asserted.\n" );

AllSpoll ( 0, AddrList, ResponseList );

if (!(ibsta & ERR))  {

for (i = 0; AddrList[i] != NOADDR; i++)  {

printf ("Device at pad %x returned byte

%x.\n", AddrList[i], ResponseList[i] );

}

}

}