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