In shorts, for almost every webserver based starter kit you get, the demo code for updating displayed parameters on the page ( e.g status of analog or digital sensors ) will be made by changing some value on the HTML label marker in ASCII format. Prior to getting introduced with the the TM4C1294 kit, it would be very important to deep a little with the HTML syntax.
i wont one for LPC1768. i tried implementing Texas TMC4129 example in lpc1768 worked for while but it just lets add me 26 parameter if you add more it fails.
and other what u suggest to use SSI or Javascript ??
i have used TM4c129, its freeRTOS example is really good and uses CGI-SSI.
you should to use makfsfile.exe utility to convert html page to HEX code, it helps lot, HTML page is very easy to update.