Sends a string containing a sequence of GPIB commands to the specified GPIB board.
[ lSent = ] GpibCommands ( lBoard, sStr [, lBytes ] )
The GpibCommands procedure syntax has the following parts:
|
Name |
Type |
Description |
|
lSent |
Long |
Bytes sent |
|
lBoard |
Val Long |
Board address |
|
sStr |
Val BString |
A sequence of GPIB commands |
|
lBytes |
Val Long |
Number of bytes to send |
The hexadecimal format of lBoard is as follows:
lBoard = 0xBB0000
Where:
BB = Board address (1 - 9)
GpibCommands is used when special command sequences which are not supported by other ATEasy function need to be sent directly to GPIB device(s). Do not use this function to transmit data instructions to devices. All bytes are sent with ATN set on.
The following table lists the available commands and their decimal values:
|
Value |
CMD |
Remark |
|
1 |
GTL |
Go To Local |
|
4 |
SDC |
Selective Device Clear |
|
5 |
PPC |
Parallel Poll Configure |
|
8 |
GET |
Group Execute Trigger |
|
17 |
LLO |
Local Lock Out |
|
20 |
DCL |
Device Clear |
|
21 |
PPU |
Parallel Poll Unconfigure |
|
24 |
SPE |
Serial Poll Enable |
|
25 |
SPD |
Serial Poll Disable |
|
32 -62 |
LADx |
Listen address x |
|
63 |
UNL |
Un-Listen |
|
64-94 |
MTAx |
My Talk address x |
|
95 |
UNT |
Un-Talk My Talk address x |
If lBytes is not specified, then the number of bytes will be the length of the sStr.
The following command simultaneously triggers GPIB devices at addresses 1, 2, and 4 connected to board # 1:
GpibCommand(0x10000, "?\x033\x034\x036\x008", 5 )
Where:
|
'?' |
UNL Un-Listen |
|
'\x033' |
L1 Listen address 1 |
|
'\x034' |
L2 Listen address 2 |
|
'\x036' |
L4 Listen address 4 |
|
'\x008' |
Group Execute Trigger |