m1rc3/norruption/peek: new tool to quickly check for corruption at low addresses

m1rc3/norruption/peek

@@ -0,0 +1,24 @@
+#!/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)