Petre,

Reading the manual is says:

"You can download the .HEX program file and the .BIT bitstream file to the XS40 Board
using the XSLOAD program. XSLOAD stores the contents of the .HEX file into the
SRAM on the XS40 Board and then it reconfigures the FPGA by loading it with the
bitstream file."

Can your micro get to the SRAM?

regards,
p