National Instruments Welding System 321645c-01 Manual Do Utilizador
Chapter 2
Function Reference — GPCTR_Control
©
National Instruments Corporation
2-211
NI-DAQ FRM for PC Compatibles
GPCTR_Control
Format
status = GPCTR_Control (deviceNumber, gpctrNum, action)
Purpose
Controls the operation of the general-purpose counter.
Parameters
Input
Parameter Discussion
Legal ranges for the gpctrNum and action are given in terms of constants defined in a header
file. The header file you should use depends on the language you are using:
file. The header file you should use depends on the language you are using:
•
C programmers—
NIDAQCNS.H
(
DATAAQC.H
for LabWindows/CVI)
•
BASIC programmers—
NIDAQCNS.INC
(Visual Basic for Windows programmers should
refer to the
section in Chapter 1,
, for more information.)
•
Pascal programmers—
NIDAQCNS.PAS
gpctrNum indicates which counter to program. Legal values for this parameter are shown in
Table 2-20.
Table 2-20.
action is what NI-DAQ performs with the counter. Legal values for this parameter are as
follows.
follows.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
gpctrNum
u32
number of the counter to use
action
u32
the action NI-DAQ takes
Table 2-30. Legal Values for the action Parameter
action
Description
ND_PREPARE
Prepare the general-purpose counter for the operation selected
by invocations of the
by invocations of the
GPCTR_Set_Application
and
(optionally)
GPCTR_Change_Parameter
function. Do not
arm the counter.
ND_ARM
Arm the general-purpose counter