ADLINK Technology PCI-MPG24 Manuale Utente Scaricare il pdf (Pagina 65)

Reference Manual 55

6 Reference Manual

6.1 Preview

GPIO Access

The GPIO provides a method to read board information, select

input channel, and control digital inputs/digital outputs.

Sample:

#define INSTANCE_DATA_OF_PROPERTY_PTR(x) (

(PKSPROPERTY ((x)) ) + 1 )

#define INSTANCE_DATA_OF_PROPERTY_SIZE(x) (

sizeof((x)) – sizeof (KSPROPERTY) )

void GPIOWrite(IBaseFilter* pFilter,DWORD

bit,DWORD value)

{

IKsPropertySet *pKs = NULL;

DWORD TypeSupport = 0;

KSPROPERTY_CUSTOMBT848_GPIO_S rc;

HRESULT hr;

ULONG ret=0;

if (pFilter->QueryInterface(IID_IKsPropertySet,

(void **)&pKs) == S_OK)

{

hr = pKs-

>QuerySupported(PROPSETID_CUSTOMBT848,KSPROPERTY

_CUSTOMBT848_GPIO,&TypeSupport);

if(TypeSupport & KSPROPERTY_SUPPORT_GET)

{

ZeroMemory(&rc,sizeof(rc));

rc.dwOperation=BT848_CUSTPROP_GPIO_SETGPDATABITS;

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ADLINK Technology PCI-MPG24 Manuale Utente Pagina 65