GpCommandAsync

$image\BLTLRGSQ.gif$ Boards that Support the Function $image\SETUP.gif$ $image\SANBTN.gif$

$image\head10.gif$ Operation Sets ATN to True to transmit commands in asynchronous.

$image\head10.gif$ Format

(VB.NET)

Dim Ret As Integer

Dim Cmd(xxxx) As Integer ' (xxxx specifies the maximum number of command arrays.)

Ret = GpCommandAsync(Cmd)

(C)

DWORD Ret;

DWORD * Cmd;

Ret = GpCommandAsync(Cmd);

(C#)

uint Ret;

uint[] Cmd = new uint[xxxx]; /* (xxxx specifies the maximum number of command arrays.) */

Ret = gpib.CommandAsync(Cmd);

(Python)

Ret = ctypes.c_ulong()

Cmd = (ctypes.c_ulong * xxxx)() #(xxxx specifies the maximum number of command arrays.)

Ret.value = GpibPy.GpCommandAsync(Cmd)

$image\head10.gif$ Mode Master mode only

$image\head10.gif$ Parameters

Cmd : Command array

[0] Number of commands

[1] Command data

[2] Command data

$image\CONTINUE.gif$

Ret : Return value

0 : Normal completion

80 : GpIni() hasn't execute

140 : Asynchronous function is executing now

190 : Cannot create the Event object

200 : Cannot create new thread

'ErrCode' of GpCheckAsync()

0 : Normal completion

141 : Stop by GpStopAsync()

240 : ESC key pressed

252 : GP-IB error

254 : Timeout

255 : Illegal call

(See "Return Values" for details.)

$image\head10.gif$ Notes

1 The completion of the transmission is monitored with GpCheckAsync().
When it is finished normally, return value of GpCheckAsync() is 0 and ErrCode (2nd parameter) is 0.

2 The return value of 141/252/254 and 255 are not returned directly from this function.
These values are returned to 'ErrCode' that is 2nd parameter of GpCheckAsync().

3 As for the GPIB command (multi-line message), refer to a "Multi-line Message List" in Additional Information category.