Справочник Пользователя для National Instruments 321645c-01
Chapter 2
Function Reference — WFM_Set_Clock
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National Instruments Corporation
2-441
NI-DAQ FRM for PC Compatibles
WFM_Set_Clock
Format
WFM_Set_Clock (deviceNumber, group, whichClock, desiredRate, units, actualRate)
Purpose
Sets the update rate for a group of channels (DSA devices only).
Parameters
Input
Output
Parameter Discussion
group is the group of analog output channels (see
WFM_Group_Setup
)
.
Range:
1.
whichClock indicates the type of clock. Only one clock is currently supported so set this
parameter to zero.
parameter to zero.
desiredRate is the rate at which you want data points to be sent to the DACs.
units determines how desiredRate and actualRate are interpreted:
0:
points per second
1:
seconds per point
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
group
i16
group of analog output channels
whichClock
u32
only update clock supported
desiredRate
f64
desired update rate in units
units
u32
ticks/second or seconds/tick
Name
Type
Description
actualRate
f64
actual update rate in units