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Chapter 2 Function Reference — GPCTR_Config_Buffer
NI-DAQ FRM for PC Compatibles 2-210
©
National Instruments Corporation
Using This Function
You need to use this function to use a general-purpose counter for buffered operation. You
should call this function after calling the
GPCTR_Set_Application function.
NI-DAQ transfers counted values into the buffer assigned by this function when you are
performing a buffered counter operation.
If you are using the general-purpose counter for
ND_BUFFERED_PERIOD_MSR,
ND_BUFFERED_SEMI_PERIOD_MSR, or ND_BUFFERED_PULSE_WIDTH_MSR, or
ND_BUFFERED_TWO_SIGNAL_EDGE_SEPARATION_MSR, you should wait for the operation
to be completed before accessing the buffer.
For the 6602 and 455X devices, you can use
GPCTR_Change_Parameter
with
paramID =
ND_BUFFER_MODE
to select continuous buffered operations (ND_DOUBLE) or
single-buffered operations (
ND_SINGLE). In continuous buffered operation mode you can
use
GPCTR_Read_Buffer to access parts of the buffer while the operation is in progress.