sample11_ai.c

此源码事基于ＣＶＩ的

#include <ansi_c.h>
#include "Dataacq.h"
#include <userint.h>
void main(void)
{
    //定义变量
    short iStatus = 0;                           //函数返回值         
    double dSampRate = 1000.0;                   //采样率     
    short iUnits = 0;                            //采样率单位
    short iSampTB = 0;                           //时间单位
    unsigned short uSampInt = 0;                 //时间间隔

    short iDevice = 1;                           //采样设备ID号
    short iChan = 1;                             //采样通道号
    short iGain = 1;                             //采样增益
    short piBuffer[100] = {0};                   //采样数据
    unsigned long ulCount = 100;                 //采样长度

    short iDAQstopped = 0;                       //采样状态
    unsigned long ulRetrieved = 0;               //已采数据长度

    double dGainAdjust = 1.0;                    //数据转换增益
    double dOffset = 0.0;                        //数据转换偏移量
    double pdVoltBuffer[100] = {0.0};            //转换的double型数据

    //由采样频率获得抽样间隔时间及其单位
    iStatus = DAQ_Rate(dSampRate, iUnits, &iSampTB, &uSampInt);
    
    //从指定设备中的指定通道中读取数据
    iStatus = DAQ_Start(iDevice, iChan, iGain, piBuffer, ulCount,
                      iSampTB, uSampInt);
    
    while ((iDAQstopped != 1) && (iStatus == 0)) {
          //判断是否采集完毕
          iStatus = DAQ_Check(iDevice, &iDAQstopped, &ulRetrieved);
    }
    
    //将采集结果从short型转换成double型
    iStatus = DAQ_VScale(iDevice, iChan, iGain, dGainAdjust, dOffset,
                        ulCount, piBuffer, pdVoltBuffer);
    
    //清除数据采集操作并重新初始化数据采集卡
    iStatus = DAQ_Clear(iDevice);
	    
    YGraphPopup ("Data", pdVoltBuffer, ulCount, VAL_DOUBLE);
}