Masterclock TCR1000 Manual do Utilizador descarregar pdf (Página 21)

TCR1000SDK–Rev.3.0.0   Page21

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//GPS‐100/200/200Astatuses

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GPS_STATUS_FREEWHEEL 0x00000001 //unitisfreewheeling

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//Usercallbackroutinefunctiontype

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typedefDWORD(__stdcall*PTCRASYNC_CALLBACK_ROUTINE)(DWORDdwStatus,PVOIDdata,

DWORDdataLen);

RelationshipofTCRInterruptstoAPIAsynchronousNotifications

ThissectiondescribestherelationshipbetweentheinterruptsthattheTCRthrowsinresponseto

timecodeeventsandtheAPIasynchronousnotificationhooks.TheTCRdriverisanintermediary

betweentheaforementionedobjectsbutthisistransparenttotheapplicationprogrammer.

KnowledgeoftheinformationinthissectionisnotrequiredtousetheAPIbutshouldbeconsidered

inscenarioswheremulti‐process/threaduseofAPIwillbeimplemented.

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TCRinterrupt APIcallbackhook

TimeSetInterrupt

(Once/minuteinterruptthrownwhentime

codeseconds=30,frame=0)

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ASYNC_TIMESET

Once/SecondInterrupt

(Once/secondinterruptthrownwhentime

codeframe=0)

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ASYNC_PERSEC

EndTimeCodeInterrupt

(Once/frameinterruptthrownaftertimecode

datadecoded,beforesyncword)

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ASYNC_ENDTC

StartTimeCodeInterrupt

(Once/frameinterruptthrownbeforetime

codedata

decoded,aftersyncword[topoftheframe])

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ASYNC_STARTTC

TimeCodeLoss

(Thrownwhentimecodeislostfromanactive

decodingstate)

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ASYNC_TIMELOSS

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TimeGainInterrupt

(Thrownwhentimecodeisregainedfroma

loststate)

ASYNC_TIMEGAIN

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