sys.cpp

本程序演示了半满方式的AD卡数据采集系统的实现方式和具体应用

// 本程序演示了半满方式的AD采集过程
// 只采集0,1两个通道
// 量程设为：-5V至+5V
// 使用内触发

#include "stdafx.h"
#include "windows.h"
#include "stdio.h"
#include "conio.h"

#include "PCI2006.h" // 驱动程序头文件(必须)

int main(int argc, char* argv[])
{
	HANDLE hDevice;
	int DeviceID;
	PCI2006_PARA_AD ADPara;
	SHORT ADBuffer[ 8192 ];
	int nReadSizeWords; 	
	BOOL bNotEmpty, bHalf, bOverflow; // 获得状态数组

	int nRemainder;	

	float PerLsbVolt = (float)(10000.0/16384.0); // 取得单位LSB所对应的电压值

	DeviceID = 0; // 假如只管理一个设备
	hDevice = PCI2006_CreateDevice( DeviceID );
	if(hDevice == INVALID_HANDLE_VALUE) return 0;

	ADPara.ADMode = PCI2006_SEQUENCE_MODE;//连续采集
	ADPara.ChannelCount = 2;	// 通道数量
	ADPara.ChannelArray[0].ADChannel = 0; // 0通道
	ADPara.ChannelArray[0].ADGains = 0; // 1倍增益
	ADPara.ChannelArray[1].ADChannel = 1; // 1通道
	ADPara.ChannelArray[1].ADGains = 0; // 1倍增益

	ADPara.Frequency = 25000; // 采样频率(Hz)
	ADPara.GroupInterval = 1000; //分组间隔时间 采集模式为分组方式时才有效(uS)

	ADPara.TriggerSource =PCI2006_IN_TRIGGER; // 内触发方式
	ADPara.OutDigitAnalog =PCI2006_ANALOG_TRIGGER; // 模拟触发(外触发时有效)
	ADPara.OutTriggerEdge =PCI2006_RISING_EDGE; // 上升沿((外触发时有效))

	ADPara.ClockSource =PCI2006_IN_CLOCK; // 内部时钟

	nReadSizeWords = 32; // 每次只读取32个点
	// 为每次读操作时，通道能对齐所进行的算法
	nRemainder = nReadSizeWords % ADPara.ChannelCount ; 
	nReadSizeWords = nReadSizeWords - nRemainder;

	if(!PCI2006_InitDeviceProAD( hDevice, &ADPara)) // 硬件参数, 它仅在此函数中决定硬件状态
		goto ExitRead1;	

	
	if(!PCI2006_StartDeviceProAD(hDevice)) // 启动AD转换
		goto ExitRead1;

	while ( !kbhit() )
	{	
		if(!PCI2006_GetDevStatusProAD(hDevice,&bNotEmpty,&bHalf,&bOverflow))
		{
			printf("获得状态错误!");
			break;
		}
		if(!bHalf)
		{
			//没有半满重新读标志
			continue;
		}

		if(!PCI2006_ReadDeviceProAD_Half( hDevice, ADBuffer, nReadSizeWords)) // 读入的数据
			goto ExitRead0;

		for( int Index = 0; Index< 32; Index+=2 )
		{
			// 按照-5V --- +5V 量程转换为电压值
			printf("CH0 = %7.2f \t" , (((ADBuffer[Index]^0x2000 )&0x3fff)) * PerLsbVolt - 5000.0 );
			printf("CH1 = %7.2f \n" , (((ADBuffer[Index+1]^0x2000 )&0x3fff)) * PerLsbVolt - 5000.0 );
		}		
	}
ExitRead0:
	PCI2006_ReleaseDeviceProAD( hDevice );
ExitRead1:
	PCI2006_ReleaseDevice( hDevice );	
	return 0;
}