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<TITLE>Visual C++与计算机接口</TITLE>
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<font color="#0000FF">PC7422与PCI7422采集卡</font>
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（一）实验目的：<BR>
练习数据采集卡的使用<BR><BR>
（二）实验内容：<BR><BR>
１、PC7422编程<BR><BR>
main()<BR>
{<BR>
int k,ch,dl,dh,data,dly=3000;<BR>
int port=0x310;<BR>
printf("Please Input ch(0-31):");<BR>
scanf("%d",ch);<BR>
_outp(port,ch);<BR>
_outp(port+1,0);<BR>
for(k=0;k< dly;k++);<BR>
dl=_inp(port+2);<BR>
dh=_inp(port+3);<BR>
data=(dh&15)*256+dl;<BR>
} <BR><BR>
２、PCI7422编程<BR><BR>
#include "windows.h"<BR>
#include "stdio.h"<BR><BR>
typedef int(*pci7422check)(WORD dwVendor, WORD dwDeviceID, BOOL fUseInt);<BR>
typedef WORD(*pci7422ad)(int hplx, BOOL addr, WORD port);<BR>
typedef WORD(*pci7422di)(int hplx, BOOL addr, WORD port);<BR>
typedef int(*pci7422do)(int hplx, BOOL addr, WORD port,WORD data);<BR>
typedef int(*pci7422close)(int hplx);<BR><BR>
int main()<BR>
{<BR>
pci7422check Pci7422Check;<BR>
pci7422ad Pci7422AD;<BR>
pci7422di Pci7422DI;<BR>
pci7422do Pci7422DO;<BR>
pci7422close Pci7422Close;<BR>
HMODULE dll;<BR>
int hd;<BR>
int a,i;<BR><BR>
dll=LoadLibrary("pci7422vc.dll");<BR>
Pci7422Check=(pci7422check)GetProcAddress(dll,"pci7422check");<BR>
Pci7422AD=(pci7422ad)GetProcAddress(dll,"pci7422ad");<BR>
Pci7422DI=(pci7422di)GetProcAddress(dll,"pci7422di");<BR>
Pci7422DO=(pci7422do)GetProcAddress(dll,"pci7422do");<BR>
Pci7422Close=(pci7422close)GetProcAddress(dll,"pci7422close");<BR><BR>
hd=Pci7422Check(0,0,false);<BR>
while(1){<BR>
for(i=0;i < 32;i++)<BR>
{<BR>
a=Pci7422AD(hd,false,i);<BR>
printf("%d ",a);<BR>
}<BR>
printf("\n");<BR>
}<BR>
return 0;<BR>
}<BR><BR>
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