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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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