Forum: ARM programming with GCC/GNU tools lpc2148 interface with external 4x4 matrix keypad

Author: sravani thatha (Company: PREES) (sravani)
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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

Author: Mayur Pabharekar (Company: lml) (mayurpabharekar)
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C code

Author: Afrin (Guest)
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Interfacing of. 4*4 matrix keypad with lpc 2148


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