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54 API Command Reference
Personal488 User's Manual For Windows95 and Windows NT
Clear
Syntax
INT WINAPI Clear(DevHandleT devHandle);
devHandle
refers to either an IEEE 488 hardware interface or an external device. If
devHandle
refers to a hardware interface, then a Device Clear (
DCL
) is sent. If
devHandle
refers to an external device, a Selected Device Clear (
SDC
) is sent.
Returns
-1
if error
Mode
CA
Bus States
ATN
••
DCL
(all devices)
ATN
••
UNL, MTA, LAG, SDC
(selected device)
Examples
errorcode = Clear(ieee);
Sends the Device Clear (
DCL
) command to the
IEEE interface board.
errorcode = Clear(wave);
Sends the Selected Device Clear (
SDC
) command
to the WAVE device.
errorcode = Clear(dmm);
Sends the Selected Device Clear (
SDC
) command
to the DMM device.
See Also
Reset, ClearList
The
Clear
command causes the Device Clear (
DCL
) bus command to be issued to an interface or a
Selected Device Clear (
SDC
) command to be issued to an external device. IEEE 488 bus devices that
receive a Device Clear or Selected Device Clear command normally reset to their power-on state.
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