Content originally posted in LPCWare by CodeRedSupport on Fri Jul 05 07:41:23 MST 2013As you say you are using LPCXpresso, you may find the LPCXpresso forum as useful place to look for help. In particular this recent thread may be of interest...
http://knowledgebase.nxp.com/showthread.php?t=4730
To actually debug an LPC810 with LPCXpresso though, you will basically need either an LPC-Link (from an LPCXPresso board), or an LPC-Link2.