Updater: Write functional ram code loader

Updater RAM Code
----------------
* Ack running watchdog every 250 ms
* Blink green LED every 250 ms

Firmware
--------
* Add RAM code loader
* Reorganize initialization
* Add update command to shell

stm-firmware/updater/ram-code/bin2carray.py

@@ -18,6 +18,9 @@ with open(source_file, "rb") as src:
 	data = src.read()
 
 with open(dest_file, "w") as dest:
+	header_guard = "__" + dest_file.replace('.', '_').replace('-', '_') + "_H__"
+	dest.write("#ifndef %s\n" % (header_guard))
+	dest.write("#define %s\n" % (header_guard))
 	dest.write("static const char binary_blob[%d] = {\n" % (len(data)))
 	for current,idx in zip(data, range(len(data))):
 		if ((idx+1) % 4 == 0):
@@ -26,5 +29,6 @@ with open(dest_file, "w") as dest:
 			dest.write(hex(current)+",")
 
 	dest.write("};\n")
+	dest.write("#endif /* %s */\n" % (header_guard))
 
 sys.exit(0)