GpTalkAsync

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

$image\head10.gif$ Operation Asynchronous transmission is executed.

$image\head10.gif$ Format

(VB.NET)

Dim Srlen, Ret As Integer

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

Dim Srbuf(xxxx) As Byte ' (xxxx specifies the maximum amount of data)

Ret = GpTalkAsync(Cmd, Srlen, Srbuf)

(C)

DWORD Srlen, Ret;

DWORD * Cmd;

char * Srbuf;

Ret = GpTalkAsync(Cmd, &Srlen, Srbuf);

(C#)

uint Srlen, Ret;

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

string Srbuf;

Ret = gpib.TalkAsync(Cmd, out Srlen, Srbuf);

(Python)

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

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

Srbuf.value = (ctypes.c_ubyte * xxxx)() # (xxxx specifies the maximum amount of data)

Ret.value = GpibPy.GpTalkAsync(Cmd, ctypes.byref(Srlen), Srbuf)

$image\head10.gif$ Mode Master mode/Slave mode

$image\head10.gif$ Parameters Cmd : Command array

[0] Number of talkers and listeners ( = Number of listeners+1)

(Slave mode = 0)

[1] Talker address

[2] Listener address

[3] Listener address

$image\CONTINUE.gif$

Srlen : (IN)Transmit data length (byte)

(OUT) Transmit data length actually (byte)

Srbuf : Transmit data

SrbufB : Transmit data array(for binary)

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

242 : Miss in address specified

243 : Miss in buffers

252 : GPIB 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 141/240/242/252/254 and 255 are not returned directly from this function. These values are returned to 'ErrCode' that is 2nd parameter of GpCheckAsync().

3 About Command Array :

Since the number of commands to be sent is given to Cmd[0], specify 0 for Cmd[0] in slave mode.

4 1Mbyte will be sent if transmit data length = 0.