fel-gpio: Wrapper script to ease live GPIO settings

fel-gpio

+#!/bin/sh
+
+pio_to_sram=0x2000
+sram_to_pio=0x2004
+
+if [ -f fel-pio.bin ]; then
+	./fel write 0x2000 fel-pio.bin
+else
+	./fel write 0x2000 bin/fel-pio.bin
+fi
+
+./fel exec $pio_to_sram
+./fel read 0x3000 0x228 pio.reg
+./pio -i pio.reg print > pio.old
+cat pio.old | fgrep -v '<0><0><0><0>'
+while read cmd; do
+	./pio -i pio.reg -o pio.reg $cmd
+	./fel write 0x3000 pio.reg
+	./fel exe 0x2004
+	./fel exe 0x2000
+	./fel read 0x3000 0x228 pio.reg
+	./pio -i pio.reg print > pio.new
+	diff -U0 pio.old pio.new
+	mv -f pio.new pio.old
+done