有限N采集电压数据

注解

步骤：
1.创建任务 VkDaqCreateTask
2.创建电压通道 VkDaqCreateAIVoltageChan
3.设置采样时钟 VkDaqCfgSampClkTiming
4.开始任务 VkDaqStartTask
5.获得任务数据 VkDaqGetTaskData
6.停止任务 VkDaqStopTask
7.清理任务 VkDaqClearTask

有限N采集电压数据流程图示例

C语言参考

#include <stdio.h>
#include "libvkdaq.h"
 
#define VkDaqErrChk(functionCall)       if( VkDaqFailed(error=(functionCall)) ) goto Error; else
 
int main(void)
{
    TaskHandle      taskHandle = "VkDaqTaskHandle"; 
    float64         data[1000]; 
    int32           error = 0;
    int32           read = 0;
 
    // VkDaq Configure Code
    VkDaqErrChk(VkDaqCreateTask(taskHandle)); 
    VkDaqErrChk(VkDaqCreateAIVoltageChan(taskHandle, "dev1/AIN1", "", VkDaq_Val_SingleEnded, -10.0, 10.0, VkDaq_Val_Volts, ""));
    VkDaqErrChk(VkDaqCfgSampClkTiming(taskHandle, VkDaq_Val_ClkSrc_OnBoardClk, 10000, VkDaq_Val_Rising, VkDaq_Val_FiniteSamps, 1000)); 
 
    // VkDaq Start Code
    VkDaqErrChk(VkDaqStartTask(taskHandle));
 
    // VkDaq Read Code
    read = VkDaqGetTaskData(taskHandle, data, 1000, VkDaq_Val_GroupByChannel, 1);
    if (read > 0)
        printf("Acquired %d samples.\n", read);
 
Error:
    if (VkDaqFailed(error))
        printf("VkDaq Error: %s\n", VkDaqGetLastErrorInfo());
    if (taskHandle != 0) {
        // VkDaq Stop Code
        VkDaqStopTask(taskHandle);
        VkDaqClearTask(taskHandle);
    }
    printf("End of program, press Enter key to quit\n");
    getchar();
    return 0;
}