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/*----------------------------------------------------------------------
This program will acquire data from channel 2 of the AT-MIO-16E-10 board.
All settings are made in the program itself, there are not any inputs for
the user. The current settings are:
data points 500 - set with the COUNT
All NI-DAQ C functions can run under the Ch Standard Edition, this
program has plot function which require the Ch Professional/Student Edition.
-----------------------------------------------------------------------*/
#include <windows.h> /* needed for NIDAQ */
#include <nidaq.h> /* NIDAQ functions */
#include <stdio.h> /* input/output functions */
#include <chplot.h> /* ploting functions */
#include <numeric.h> /* use linspace() */
#define COUNT 500 /* # of data points */
#define NUM_OF_SEC 3 /* amount of time to take data */
int main()
{
short
InDevice = 1, /* device number of A/D card set in NIDAQ */
InChannel = 2, /* channel to read from */
InGain = 1, /* gain to apply to the reading */
InBuffer[COUNT] = {0}, /* buffer to hold data from A/D card */
InStatus; /* return value of NIDAQ functions for error check */
long
InTimeOut = 360; /* # of timer ticks to wait for data to be acquired before assume error */
unsigned long
InCount = COUNT; /* # of data points to take */
double
InRate = COUNT/NUM_OF_SEC, /* frequency of data acquisition */
GainAdjust = 1, /* factor to adjust the gain in binary to value conversion */
Offset = 0, /* binary offset needed in binary to value conversions */
time[COUNT], /* buffer to hold time stamp */
VoltBuffer[COUNT]; /* buffer to hold converted data */
CPlot plot; /* instantiate a plot class */
/****** print a header to the screen ******/
printf ("This program will acquire %d points from channel %d.\n",
InCount, InChannel);
/****** set time for timeout and error check ******/
if ((InStatus = Timeout_Config(InDevice, InTimeOut)) != 0)
{
printf ("Timeout_Config error %d\n",InStatus);
exit(InStatus);
}
/****** acquire data and error check ******/
if ((InStatus = DAQ_Op(InDevice, InChannel, InGain, InBuffer, InCount, InRate)) != 0)
{
printf ("DAQ_Op error %d\n",InStatus);
exit(InStatus);
}
/****** convert binary data to input data type and error check ******/
if ((InStatus = DAQ_VScale(InDevice, InChannel, InGain, GainAdjust, Offset, InCount, InBuffer, VoltBuffer)) != 0)
{
printf ("DAQ_VScale error %d\n",InStatus);
exit(InStatus);
}
/****** plot the data ******/
linspace(time, 0, NUM_OF_SEC);
plotxy(time, VoltBuffer,"Data acquired through NIDAQ","time (sec)", "Voltage (volts)",&plot);
plot.grid(PLOT_ON);
plot.plotting();
}
/* End of Program */
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