Hi , I am working with my first project, can u help me for writing a PWM code for lpc 2368
That's really a question for NXP - the PWM part has nothing to do with ARM.
See: https://community.arm.com/developer/tools-software/tools/f/keil-forum/43684/lpc2148-timer0-not-working-as-expected/158950#158950
Also, for a first project, why start with such an old chip?
See: https://community.arm.com/developer/tools-software/tools/f/keil-forum/43684/lpc2148-timer0-not-working-as-expected/158928#158928
For getting started with Keil, see:
http://keil.com/learn
See also: http://www.keil.com/books/
Thank you sir
You're welcome.