Measurement-computing GPIB-488.2 Manuale Utente Scaricare il pdf (Pagina 57)

GPIB 488.2 Porting Guide 986992 IOtech to Associated MCC APIs 3-39

IOtech GPIB Commands Associated MCC GPIB 488.2 Command(s)

SPoll

AllSpoll

IOtech GPIB Commands Associated MCC GPIB 488.2 Command(s)

SPollList AllSpoll

Syntax

SPoll INT WINAPI SPoll(DevHandleT devHandle);

SPollList INT WINAPI SPollList(DevHandlePT devHandleList,

LPBYTE resultList, BYTE SPollFlag);

AllSpoll AllSpoll (int board, short addresslist[],

short resultlist[])

Usage Notes

SPoll and SPollList – No longer to be used. In Active Controller mode, these commands

performed a Serial Poll of the bus device specified and responded with a number from 0 to 255

representing the decimal equivalent of the eight-bit device response.

Serial Polls were normally performed in response to assertion of the Service Request (SRQ) bus

signal by some bus device.

In the following example, we see serial polls two devices (GPIB address 6 and 7) connected to

GPIB board 0.

Example:

short addresslist[3] = {6,7,NOADDR};

short resultlist[2];

AllSpoll (0, addresslist, resultlist);

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Measurement-computing GPIB-488.2 Manuale Utente Pagina 57