hi...

I am new to arm. Now i am working with LPC2148(NGX blue board).I managed 
to interface GLCD(256x160).Now i am trying to interface an external 4x4 
matrix keypad with the following connections:


GLCD connections:

P0.16-P0.23 are Data lines for GLCD

P1.16-P1.20 are control lines for GLCD



Key pad connections

P0.0-P0.3 for columns taken as input

P0.4-P0.7 for rows taken as output

C code