4x3 matrix interfacing program in c

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Dear members,
I want to interface a 4x3 matrix keyboard with atiny and display it on lcd .

I want to know first how to interface 4x3 keyboard with controller only with c program
please help me

thanks in advance.
 

this is sample program by using 8051. i hope it help you

- - - Updated - - -

also show this websites
http://www.engineersgarage.com/embedded/avr-microcontroller-projects/interfacing-keypad-circuit
http://extremeelectronics.co.in/avr-tutorials/4x3-matrix-keypad-interface-avr-tutorial/
 

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