Keypad question (aliasing button names)

dumb question here goes:

i have keypad setup this

code: [select]

[code]

char keys[rows][cols] = {
 {
   '1', '2', '3', 'menu', 'more'
 }
 ,
 {
   '4', '5', '6', 'pesc', 'z'
 }
 ,  
 {
   '7', '8', '9', 'enter', 'f_three)'
 }
 ,
 {
   '*', '0', '#', 'sql', 'ftwo'
 }
 ,
 {
   'fone', 'uppersb', 'lowersb', 'arrowdown', 'arrowup'
 }
};




when using if statement have use last character of button name. example:

code: [select]

if (key == 'e') {   // must use e instead of f_one
     indexaccumulator++;
}

what proper procedure establishing meaningful button names beyond 1-9,#,* etc... , utilize them within code? thanks[/code]

quote from: mancow on jun 04, 2014, 05:20 pm

dumb question here goes:

i have keypad setup this

code: [select]



char keys[rows][cols] = {
 {
   '1', '2', '3', 'menu', 'more'
 }
 ,
 {
   '4', '5', '6', 'pesc', 'z'
 }
 ,  
 {
   '7', '8', '9', 'enter', 'f_three)'
 }
 ,
 {
   '*', '0', '#', 'sql', 'ftwo'
 }
 ,
 {
   'fone', 'uppersb', 'lowersb', 'arrowdown', 'arrowup'
 }
};




when using if statement have use last character of button name. example:

code: [select]

if (key == 'e') {   // must use e instead of f_one
     indexaccumulator++;
}

single quotes denote single character. "f_one" string, not single character.

quote

what proper procedure establishing meaningful button names beyond 1-9,#,* etc... , utilize them within code? thanks

constants:

code: [select]


const char f_one =0;
const char menu = 1;
const char more = 2;
...
char keys[rows][cols] = {
 {
   '1', '2', '3', menu, more
 }
...
if (key == f_one)
{
 ...


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