Measurement-computing Personal488 rev.3.0 For DOS & Windows 3.Xi Uživatelský manuál stáhnout pdf (Strana 66)

II. SOFTWARE GUIDES - 8. Driver488/DRV 8D. Getting Started

Personal488 User’s Manual, Rev. 3.0 II-51

Keyboard Controller Program

The program

KBC.EXE

is a utility program that allows you to enter Driver488/DRV commands from

the keyboard and see what effect they have. When

KBC

is run, it displays an

IEEE>

prompt and waits

for a command to be entered from the keyboard. When the

<Enter>

key is pressed,

KBC

sends the

command to Driver488/DRV and displays any response or error messages that occur. This allows you

to test the various Driver488/DRV commands and their effects on your instruments without having to

write a program. A dialog with

KBC

might be:

First, we can use the

HELLO

command to display the Driver488/DRV revision identification:

IEEE> HELLO <Enter>

Driver488 Revision X.X ©199X IOtech, Inc.

Then check the Driver488/DRV status:

IEEE> STATUS <Enter>

CS21 1 I000 000 T0 C0 P0 OK

The following indicators describe each component of the Driver488/DRV status:

Next, take a reading from IEEE 488 bus device

IEEE> ENTER 16 <Enter>

NDCV=035.679E-3

Now, list the commands that have been executed so far and re-execute the

ENTER

command:

IEEE> .L <Enter>

3 HELLO

2 STATUS

1 ENTER 16

IEEE .1 <Enter>

IEEE> ENTER 16 <Enter>

NDCV+032.340E-3

Notice that the

and

commands are not Driver488/DRV commands. Instead, they are supplied by

the

KBC

program. The

command is used to show a list of the previously entered commands.

KBC

keeps the last 20 commands in this list. Any of these commands can be reentered by typing a period

followed by the number of that command. For example, the

command reenters the last command

that was entered. The user may then edit this command, or may just press

<Enter>

re-executing the

command.

Indicator Driver488/DRV Status

It is in the Controller state.

It is the System Controller.

The value of its IEEE 488 bus address.

An Address Change has occurred.

It is idle (neither a talker nor a listener).

There is no

ByteIn

available.

It is not ready to send a

ByteOut

Service Request (

SRQ

) is not asserted.

000

There is no outstanding error.

It has not received a bus device

TRIGGER

command (only applicable in the Peripheral

mode).

It has not received a

CLEAR

command (only applicable in the Peripheral mode).

CONTINUE

transfer is in progress.

The error message is “OK”.

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 399 400

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