Masterclock TCR1000 Manual do Utilizador descarregar pdf (Página 17)

TCR1000SDK–Rev.3.0.0   Page17



TheAsynchronousCallbackFunction

Whenenabled,theAPIwillcallauser‐suppliedcallbackfunctionreportingtheactivationofinterrupts

ontheTCR.



AnexampleofthecallbackfunctioninC/C++:



DWORD_stdcallTCR1000_ApiAsyncCallback(DWORDdwStatus,PVOIDdata,DWORDdataLen)

{

PTCRTIMEtime;



switch(dwStatus)

{

caseASYNC_PERSEC:

//dataisapointertoaTCRTIMEdatastructureanddataLen=sizeof(TCRTIME)

time=(PTCRTIME)data;

break;



caseASYNC_TIMESET:

//dataisapointertoaTCRTIMEdatastructureanddataLen=sizeof(TCRTIME)

time=(PTCRTIME)data;

break;



caseASYNC_STARTTC:

//dataisapointertoaTCRTIMEdatastructureanddataLen=sizeof(TCRTIME)

time=(PTCRTIME)data;

break;



caseASYNC_ENDTC:

//dataisapointertoaTCRTIMEdatastructureanddataLen=sizeof(TCRTIME)

time=(PTCRTIME)data;

break;



caseASYNC_TIMELOSS:

//dataisNULLanddataLen=0

break;



caseASYNC_TIMEGAIN:

//dataisNULLanddataLen=0

break;

}



return(0);

}



Thecallbackfunctionmayhaveanynamethattheuserapplicationrequires,butmusthavetheexact

callingconventionandparameterdeclarationasshownabovetoavoidcorruptionofthestackwhen

thefunctioniscalledbytheAPI.

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