AI_ContReadChannel函数 点击：4167 | 回复：21
发表于：2003-12-04 11:41:00
1楼
看来你的卡型是PCI-9111DG或PCI-9112/cPCI9112或PCI-9118DG/HG中的某一款，对吧？
先把数据取回来再对数组统一处理。
函数原型：
I16 AI_ContReadChannel (U16 CardNumber, U16 Channel,
U16 AdRange, U16 *Buffer, U32 ReadCount,
F32 SampleRate, U16 SyncMode);
Description:
Buffer : An integer array to contain the acquired data.
Buffer must has a length equal to or greater
than the value of parameter ReadCount.
If double-buffered mode is enabled, this buffer
is of no use, you can ignore this argument.
//...若采用non-double-buffer mode...
#define ChNo 0
#define AdRange AD_B_5_V
#define SampLen 2048 //读取样点数
#define SampRate 20000.000f
U16 InBuf[SampLen];
......
AI_ContReadChannel(CardID, ChNo,AdRange,InBuf,
SampLen,SampleRate,SYNC_ASYNC)；
......
for(i=0;i<SampLen;i++)
InBuf[ChNo] /= 16;//<==>InBuf[i]>>=4;
这就可以了.
发表于：2003-12-04 12:17:00
4楼
PCI-9111DG 同步，non-double-buffer mode 源代码如下：
// PCI_9111DG : Continuous AI
/********************************************************
The following code segment is generated according to
your device setup. You can copy and insert it into
your program to operate your device.
********************************************************/
#include "dask.h"
//constants definition
#define CardNumber 0
#define ADChan 0
#define ScanCount 65536
#define SampleRate 8000.0000
//AI config constants definition
#define PreTrigEn 0
#define TraceCnt 0
//variables definition
I16 cardID = -1;
I16 err=0;
U32 AccessCnt = 0;
U32 MemSize = 0;
I16 InBuf[65536]; //AI data buffer
cardID = Register_Card(PCI_9111DG, CardNumber);
if (cardID<0) {
//Error occurs !!
//ToDo : Handle error here
}
err = AI_InitialMemoryAllocated(cardID,&MemSize);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
if (MemSize*1024 < ScanCount*sizeof(I16) ) {
//available memory size for analog input in the device driver
//is smaller than the data size specified!!
//ToDo : do something here
}
err = AI_AsyncDblBufferMode(cardID, 0);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
err=AI_9111_Config(cardID, TRIG_INT_PACER, PreTrigEn, TraceCnt);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
err=AI_ContReadChannel (cardID, ADChan, AD_B_10_V, InBuf, ScanCount, SampleRate, SYNCH_OP);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
Release_Card(cardID);
//------------end--------------------------------------
////////////////////////////////////////////////////////
PCI-9111DG 异步，non-double-buffer mode源代码如下
// PCI_9111DG : Continuous AI
/********************************************************
The following code segment is generated according to
your device setup. You can copy and insert it into
your program to operate your device.
********************************************************/
#include "dask.h"
//constants definition
#define CardNumber 0
#define ADChan 0
#define ScanCount 65536
#define SampleRate 8000.0000
//AI config constants definition
#define PreTrigEn 0
#define TraceCnt 0
//variables definition
I16 cardID = -1;
I16 err=0;
BOOLEAN fstop = 0;
U32 AccessCnt = 0;
U32 MemSize = 0;
I16 InBuf[65536]; //AI data buffer
cardID = Register_Card(PCI_9111DG, CardNumber);
if (cardID<0) {
//Error occurs !!
//ToDo : Handle error here
}
err = AI_InitialMemoryAllocated(cardID,&MemSize);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
if (MemSize*1024 < ScanCount*sizeof(I16) ) {
//available memory size for analog input in the device driver
//is smaller than the data size specified!!
//ToDo : do something here
}
err = AI_AsyncDblBufferMode(cardID, 0);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
err=AI_9111_Config(cardID, TRIG_INT_PACER, PreTrigEn, TraceCnt);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
err=AI_ContReadChannel (cardID, ADChan, AD_B_10_V, InBuf, ScanCount, SampleRate, ASYNCH_OP);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
do {
AI_AsyncCheck(cardID, &fstop, &AccessCnt);
} while (!fstop);
err = AI_AsyncClear(cardID, &AccessCnt);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
}
Release_Card(cardID);
//------end-----------------------------------------
你是不是那里出了错漏？
你可以用PCIS-DASK 4.0里的PCIS-DASK Code Creator自己生成
上述代码。
发表于：2003-12-05 15:54:00
14楼
请注意PCIS-DASK中关于AI_ContReadChannel的ReadCount参数的下述说明：“Note: if the card is PCI-9111, PCI-9113 or PCI-9114, this function uses FIFO-Half-Full interrupt transfer mode. So the value of ReadCount must be the multiple of 512 for non-double-buffer mode, or multiple of 1024 for double-buffer mode.”
至于采样长度为65536，err=-15，应该是你驱动的AI Buffer设置的不够大。
发表于：2005-10-17 20:37:00
19楼
VC下用下面函数采集时,5路以下都可以,一但大于5路,就提示堆栈溢出?为什么?大虾指教
#define CardNumber 0
#define LastADChan 6
#define ADChanCount 7 //5路以下都可以
#define ScanCount 2048
#define SampleRate 7000.0000
#define SampLen 49152
//Sampling-Length per AD channel,in samples
F64 vaiData[ADChanCount*SampLen];//volt-value of AI data
I16 cardID = -1;
I16 err=0;
BOOLEAN fstop = 0;
BOOLEAN HalfReady = 0;
U32 AccessCnt = 0;
U32 MemSize = 0;
U32 InBuf[ADChanCount*SampLen]; //AI data buffer
U32 CurSamples = 0;//total numbers of current transferred samples
cardID = Register_Card(PCI_9114DG, CardNumber);
if (cardID<0) {
//Error occurs !!
//ToDo : Handle error here
CString str;
str.Format("Error: Register_Card(). CarID=%d",cardID);
AfxMessageBox(str);
exit(1);
}
err = AI_InitialMemoryAllocated(cardID,&MemSize);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
CString str;
str.Format("Error: AI_InitialMemoryAllocated()");
AfxMessageBox(str);
exit(1);
}
if (MemSize*1024 < ScanCount*ADChanCount*sizeof(U32) ) {
//available memory size for analog input in the device driver
//is smaller than the data size specified!!
//ToDo : do something here
CString str;
str.Format("Error: AI_InitialMemoryAllocated()");
AfxMessageBox(str);
exit(1);
}
err = AI_AsyncDblBufferMode(cardID, 1);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
CString str;
str.Format("Error: AI_AsyncDblBufferMode().errcode = %d",err);
AfxMessageBox(str);
exit(1);
}
err=AI_9114_Config(cardID, TRIG_INT_PACER);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
CString str;
str.Format("Error: AI_9114_Config().errcode=%d",err);
AfxMessageBox(str);
exit(1);
}
err=AI_ContScanChannels (cardID, LastADChan, AD_B_10_V, NULL, ScanCount*ADChanCount, SampleRate, ASYNCH_OP);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
CString str;
str.Format("Error: AI_ContScanChannels(). errcode = %d",err);
AfxMessageBox(str);
exit(1);
}
do {
do {
AI_AsyncDblBufferHalfReady (cardID, &HalfReady, &fstop);
} while (!HalfReady);
//half buffer data is ready for read
AI_AsyncDblBufferTransfer (cardID, (U16*)(&InBuf[CurSamples]));
CurSamples += ScanCount/2;}
//here to add the condition to continue the acquisition
while (CurSamples<ADChanCount*SampLen);
err = AI_AsyncClear(cardID, &AccessCnt);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
CString str;
str.Format("Error: AI_AsyncClear().errcode=%d",err);
AfxMessageBox(str);
exit(1);
}
AfxMessageBox("sampling completed!");
err=AI_ContVScale(cardID,AD_B_10_V,InBuf,vaiData,ADChanCount*SampLen);
if (err!=NoError) {
//Error occurs !!
//ToDo : Handle error here
CString str;
str.Format("Error: AI_ContVScale().errcode=%d",err);
AfxMessageBox(str);
exit(1);
}
Release_Card(cardID);
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