GpQddt

$image\head10.gif$ Operation Queries the command executed when GET was received. (*DDT?)

$image\head10.gif$ Format

(VB.NET)

Dim Adr, Srlen, Ret As Integer

Dim Srbuf As String

Ret = GpQddt(Adr, Srlen, Srbuf)

(C)

DWORD Adr, Srlen, Ret;

char * Srbuf;

Ret = GpQddt(Adr, &Srlen, Srbuf);

(C#)

uint Adr, Srlen, Ret;

StringBuilder Srbuf = new StringBuilder(xxxx); /* (xxxx specifies the maximum amount of data.) */

Ret = gpib.Qddt(Adr, out Srlen, Srbuf);

(Python)

Adr, Srlen, Ret = ctypes.c_ulong(), ctypes.c_ulong(), ctypes.c_ulong()

Srbuf = ctypes.create_string_buffer(xxxx) #(xxxx specifies the maximum amount of data.)

Ret.value = GpibPy.GpQddt(Adr, ctypes.byref(Srlen), Srbuf)

$image\head10.gif$ Mode Master mode only

$image\head10.gif$ Parameters

Adr : Destination device address

Valid range : 0 to 30

Srlen : (Input value) Maximum data length in bytes that can be received

(Return value) Receive data length in bytes

Srbuf : Receive buffer

Ret : Return value

0 : Normal completion

1 : Delimiter and EOI reception complete

2 : EOI reception complete

80 : GpIni() hasn't execute

128 : Receive data overflow

140 : Asynchronous function is executing now

240 : ESC key pressed

242: Miss in address specified

243: Miss in buffers

252 : GP-IB error

253 : There is no receive data

254 : Timeout

255 : Parameter error

(See "Return Values" for details.)

$image\head10.gif$ Notes

1) This function cannot be used for a device that does not support IEEE-488.2.

2) See GpListen for notes about receive buffer and receive data length in bytes.