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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]
}
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