How to use BTPipe to transfer data in blocks of 64bits?

Hi, I’m new to FP API and I have to do the following:
I need to read series of blocks from 64 bits from file and transfer them to the FPGA (I’m using XEM 6001), then I want to write them into FIFO and
write them out of the FPGA into a file again.
I’m using C++ and VHDL.
Thank you!