i connect row1->p0.0 row2->p0.1 row3->p0.2 row4->p0.3 colum1 ---->p0.4 column2---->p0.5 column3----->p0.5 i pull up all columns with 4.7k to vcc this keypad is telephone keypad please help me to write a program for this best regards javad majd
i want to know how to program 3x4 keypad with LCD (16x2)interfacing and the output as character. ex: in keypad button '2' if we press 1 x : the output as 'a' if we press 2 x : the output as 'b' if we press 3 x : the output as 'c' or similar to sms in HP(handphone)