SPI interface with other board_AVR_ESK1100 or among Arduino itself

MarkT:
That's a good point - SPI.transfer will work for both master and slave I think (master mode doesn't require the SPDR to be read, but transfer does this anyway).

Dear Sir

Thanks a lot for your kind support. Kindly go through the post Reply #23 on: Today at 05:15:07 PM and please suggest for the modification on the code.

Thanks and Regards.