You do not have to be an expert in compilation but to read the link which was provided earlier.Just check the "mcpu" option and adjust it accordingly as per your target device
can i send you my archive project its not bigger only 172 ko compile me just the uart i need embdev.net/.../06674904lpc213x_lpc214x_examples_20061205_2_.zip
i read the document but to make change on my makefile i do nt now how to do so please sir make it for me and i well insert it here add to my file please