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wernermisc/m1rc3/norruption/peek

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#!/bin/bash
#
# peek - retrieve the first 256 NOR bytes via JTAG, then compare them with
# the reference standby bitstream
#
jtag -q <<EOF
cable milkymist
detect
instruction CFG_OUT 000100 BYPASS
instruction CFG_IN 000101 BYPASS
pld load fjmem.bit
initbus fjmem opcode=000010
frequency 6000000
detectflash 0
endian big
readmem 0 0x100 peek.bin
pld reconfigure
EOF
diff -u \
<(dd if=standby.fpg bs=256 count=1 | hexdump -C) \
<(hexdump -C peek.bin)