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i am using an electrolite 162A lcd interfaced on an arm7 lpc2148 board . For the lcd to work do we require any drivers to be loaded or just a firmware programming is enough similar to 8051
With smaller embedded platforms, you normally don't need a driver, since you normally don't have an operating system that hides the hardware.
In this case, you need to write the code that communicates with the display, or google for suitable code to incorporate into your program.