Sensoray 2251 Rev.A Manual do Utilizador descarregar pdf (Página 46)

Figure 8

When the event is captured by the waiting user program( see demo source code), it calls

SN_GetMDData( &region, pBuf, BUFSIZE, board_number). The region(s) where motion was

detected is given in a bitmask in the region variable. BUFSIZE should be set to 208, the size of

the motion map. pBuf will contain the macroblock map on a bit by bit basis.

For example, assume the following is returned by SN_GetMDData where pBuf is an array of

unsigned 8 bit characters.

pBuf[0] = 0x7c;

pBuf[1] = 0x00;

pBuf[2] = 0x89;

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Sensoray 2251 Rev.A Manual do Utilizador Página 46