Hi Friends.. I am Gokhu..New to ARM..i start my learning process..i need library function of iolpc2148.h and main.h and stdio.h, RTC.h,ADC.h and DAC.h uart.h these kind of library bundle and i need a material or online site to learn arm C programming
Welcome to ARM!
You can find lots of information about the LPC2148 and what tools and software are available on the Keil website here.
I should point out, though, that these parts are based on ARM7TDMI and are really very old technology these days. If you want to learn about ARM, I suggest you start with a part based on a modern microcontroller core like the Cortex-M3. If you want to stick with NXP, you can find details of their Cortex-M range here. They also now ship the Kinetis range, originally designed by Freescale - details here.
You will find a lot more software and tools support for these more modern products.
Hoep this helps
Chris