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# xilinx spartan6
# http://www.xilinx.com/support/documentation/user_guides/ug380.pdf
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME xc6s
}
# the 4 top bits (28:31) are the die stepping. ignore it.
jtag newtap $_CHIPNAME tap -irlen 6 -ignore-version \
-expected-id 0x04000093 \
-expected-id 0x04001093 \
-expected-id 0x04002093 \
-expected-id 0x04004093 \
-expected-id 0x04024093 \
-expected-id 0x04008093 \
-expected-id 0x04028093 \
-expected-id 0x0400E093 \
-expected-id 0x0402E093 \
-expected-id 0x04011093 \
-expected-id 0x04031093 \
-expected-id 0x0401D093 \
-expected-id 0x0403D093
pld device virtex2 $_CHIPNAME.tap
set XC6S_CFG_IN 0x05
set XC6S_JSHUTDOWN 0x0d
set XC6S_JPROGRAM 0x0b
set XC6S_JSTART 0x0c
set XC6S_BYPASS 0x3f
proc xc6s_program {tap} {
global XC6S_JSHUTDOWN XC6S_JPROGRAM XC6S_JSTART XC6S_BYPASS
irscan $tap $XC6S_JSHUTDOWN
irscan $tap $XC6S_JPROGRAM
irscan $tap $XC6S_JSTART
irscan $tap $XC6S_BYPASS
}
#xtp038 and xc3sprog approach
proc xc6s_program_iprog {tap} {
global XC6S_JSHUTDOWN XC6S_JSTART XC6S_BYPASS XC6S_CFG_IN
irscan $tap $XC6S_JSHUTDOWN
runtest 16
irscan $tap $XC6S_CFG_IN
# xtp038 IPROG 16bit flipped
drscan $tap 16 0xffff 16 0x9955 16 0x66aa 16 0x850c 16 0x7000 16 0x0004
irscan $tap $XC6S_JSTART
runtest 32
irscan $tap $XC6S_BYPASS
runtest 1
}
set XC6S_ISC_ENABLE 0x10
set XC6S_ISC_DISABLE 0x16
set XC6S_ISC_DNA 0x30
# Get the "Device DNA" from the Spartan 6.
# Most Xilinx FPGA devices contain an embedded, unique device identifier called
# the "Device DNA". The identifier is nonvolatile, permanently programmed into
# the FPGA, and is unchangeable providing a great serial / tracking number.
proc xc6s_get_dna {tap} {
global XC6S_ISC_ENABLE XC6S_ISC_DISABLE XC6S_ISC_DNA
irscan $tap $XC6S_ISC_ENABLE
runtest 64
irscan $tap $XC6S_ISC_DNA
# Device DNA is 57 bits long, but we can only read 32bits at a time
# with OpenOCD.
set dna [drscan $tap 16 0 16 0 16 0 9 0]
runtest 64
irscan $tap $XC6S_ISC_DISABLE
runtest 64
# Convert the binary data into the order impact uses
scan $dna "%x %x %x %x" v1 v2 v3 v4
set bin_dna [string reverse [concat [format "%09b" $v4][format "%016b" $v3][format "%016b" $v2][format "%016b" $v1]]]
# Return a hex version of binary
scan [format "0b%s" $bin_dna] "%i" hex_dna
return $hex_dna
}
# Print out the "Device DNA" in the same format that impact uses.
proc xc6s_print_dna {tap} {
set hex_dna [xc6s_get_dna $tap]
puts [format "DNA = %57b (0x%x)\n" $hex_dna $hex_dna]
}
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