Hello friends If you have Arduino board and are thinking to buy USB to serial FTDI cable then this maybe helpful to you.
http://sajid-electronixx.blogspot.in/2013/08/programming-arduino-using-flysky-ct-6b.html (http://sajid-electronixx.blogspot.in/2013/08/programming-arduino-using-flysky-ct-6b.html)
Thank you.