Continuous output of fixed waveform

Note

Steps:
1.Create task. VkDaqCreateTask
2.Create analog output channel VkDaqCreateAIAccelChan
3.Set sampling clock VkDaqCfgSampClkTiming
4.Start task VkDaqStartTask
5.Set fixed waveform task data VkDaqSetTaskData
6.Stop task VkDaqStopTask
7.Clear task VkDaqClearTask

Example of Continuous output of fixed waveform Process Diagram

C language reference

#include <iostream>
#include <stdio.h>
#include "libvkdaq.h"
 
#define CH_NAME                     "dev1/AOUT1"
#define PI                          3.14159265358979323846
 
#define SAMPLING_FREQUENCY          10000   //1~32768               
#define WAVE_AMPLITUDE              5       //0~9
#define WAVE_FREQUENCY              10
#define WAVE_PHASE                  0       //0~360
#define WAVE_OFFSET                 0
 
#define DAQmxFailed(error)              ((error)<0)
#define VkDaqErrChk(functionCall)       if( DAQmxFailed(error=(functionCall)) ) goto Error; else
 
int main(int argc, char* argv[])
{
    int             i = 0;
    int32_t         error = 0;
    const char* taskHandle = "VkDaqTaskHandledac";
    double* data = new double[SAMPLING_FREQUENCY];
 
    // Sin Wave
    for (i = 0; i < SAMPLING_FREQUENCY; i++)
        data[i] = WAVE_AMPLITUDE * sin((double)i / (SAMPLING_FREQUENCY / WAVE_FREQUENCY + (WAVE_PHASE / 360)) * 2.0 * PI) + WAVE_OFFSET;
 
    // VkDaq Configure Code
    VkDaqErrChk(VkDaqCreateTask(taskHandle));
    VkDaqErrChk(VkDaqCreateAOVoltageChan(taskHandle, CH_NAME, "", -9, 9, VkDaq_Val_Volts, ""));
    VkDaqErrChk(VkDaqCfgSampClkTiming(taskHandle, VkDaq_Val_ClkSrc_OnBoardClk, SAMPLING_FREQUENCY, 0, VkDaq_Val_ContSamps, SAMPLING_FREQUENCY));
    // VkDaq Start Code
    VkDaqErrChk(VkDaqStartTask(taskHandle));
 
    // VkDaq Write Code
    VkDaqErrChk(VkDaqSetTaskData(taskHandle, data, SAMPLING_FREQUENCY, 0, 1, 1));
 
    printf("Generate success\n");
Error:
    if (DAQmxFailed(error))
        printf("VkDaq Error: %s\n", VkDaqGetLastErrorInfo());
    if (taskHandle != 0) {
        VkDaqStopTask(taskHandle);
        VkDaqClearTask(taskHandle);
    }
    delete[] data;
    printf("End of program, press Enter key to quit\n");
    getchar();
    return 0;
}