proc xilinx_dna_addr {chip} { array set addrs { Spartan6 0x30 Series7 0x17 } return $addrs($chip) } # Get the "Device DNA". # Most Xilinx FPGA devices contain an embedded, unique device identifier. # The identifier is nonvolatile, permanently programmed into # the FPGA, and is unchangeable providing a great serial / tracking number. # This function returns the DNA as a 64 bit integer with the 7 LSBs zeroed. # This is compatible with the FUSE DNA which contains all 64 bits. proc xilinx_get_dna {tap chip} { set XC7_ISC_ENABLE 0x10 set XC7_ISC_DISABLE 0x16 set XC7_ISC_DNA [xilinx_dna_addr $chip] irscan $tap $XC7_ISC_ENABLE runtest 64 irscan $tap $XC7_ISC_DNA scan [drscan $tap 32 0 32 0] "%08x %08x" hi lo runtest 64 irscan $tap $XC7_ISC_DISABLE runtest 64 # openocd interprets DR scans as LSB first, bit-reverse it return [scan [string reverse [format "%032b%032bb0" $lo $hi]] "%i"] } # Print out the "Device DNA" in the same format that impact uses. proc xilinx_print_dna {dna} { set dna [expr $dna >> 64 - 57] echo [format "DNA = %057b (0x%016x)" $dna $dna] } proc xc7_get_dna {tap} { return [xilinx_get_dna $tap Series7] } proc xc6s_get_dna {tap} { return [xilinx_get_dna $tap Spartan6] }