Question ADSP-21364

Hi,

   I had few questions on ADSP-21364:

1)in  parallel port programming in sample codes its written * (volatile int  *)IIPP = (int) dest ,why is that type casting done for dest array ,as  its suppose to be the base address of the array.Can someone please explain the term * (volatile int  *).

2)In  spi if we are using polling then what does TIMOD do,as TIMOD 0 is used  if we want interrupt on receieve,& TIMOD is used when we want  interrupt on transmit,how it should be configured for polling.

Thanks

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