You can use the project wizard on the Quickstart Panel to create a new project for the part you are using.
Then extract the required example code from the appropriate code bundle for your part family.
Sample Code Bundle for LPC213x/LPC214x Peripherals using Keil's μVision | www.LPCware.com
Sample Code Bundle for LPC23xx/LPC24xx Peripherals using Keil's μVision | www.LPCware.com
You should also take note of the debug probe requirements for ARM7
Which debug probes are supported by LPCXpresso IDE with which MCUs?
[You basically need an LPC-Link (the original version, not the newer LPC-Link2) or a Red Probe+)
PS : I would strongly recommend that you look at Cortex-M based MCUs - for instance the LPC1700 family for new product designs, rather than the older ARM7 based MCUs. This will provide you with much better software support and debgging capabilities.
Regards,
LPCXpresso Support
