Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 343)

daq9513GetHold
Also See: daq9513SetCtrMode
Format
daq9513GetHold(handle, deviceType, whichDevice, ctrNum, ctrVal)
Purpose
daq9513GetHold reads the hold register of the specified counter.
Parameter Summary
Parameter Type Description
handle DaqHandleT Handle to the device from which to get the 9513 hold register
deviceType DaqIODeviceType Specifies the 9513 device type
whichDevice DWORD Specifies which 9513
ctrNum DWORD The counter number
ctrVal PWORD Variable which stores the value read from the hold register of the
selected counter
Parameter Values
handle: obtained from the daqOpen function.
deviceType: must be set to value DiodtLocal9513
whichDevice: valid value for all current devices is 0
ctrNum: valid values range from 1 to 5
ctrVal: pointer to a varible in which the contents of the hold register will be placed; valid values for the
hold register range from 0 to 65,535
Returns
DerrInvCtrNum Invalid counter
DerrNotCapable No 9513 available
DerrNoError No error
For more details on error messages, please refer to the Daq Error Table.
Function Usage
The hold register read by daq9513GetHold is used in event-counting applications to store counter
values accumulated by the daq9513MultCtrl function. daq9513GetHold can read the hold register
while the count process is running without interrupting the process.
Prototypes
C/C++
daq9513GetHold(DaqHandleT handle, DaqIODeviceType deviceType, DWORD
whichDevice, DWORD ctrNum, PWORD ctrVal);
Visual BASIC
VBdaq9513GetHold&(ByVal handle&, ByVal deviceType&, ByVal whichDevice&,
ByVal ctrNum&, ctrVal%)
Program References
None
Programmer’s Manual 938295 9513 Counter-Timer Commands D-3