PIC and keyboard problem

[Joyhtidas]

Hi...
I am trying to interface one keyboard with PIC24F...
I sm using one key encoder IC... .. It returns the ASCII value...
So If i press "1" i will get value 0x31.. for "2" it is 0x32...like that..
My requirement is that, if i press "1" and then "8" i need to get integer '18'... not hex value
Please share your ideas.... :idea:
Thanks in Advance.....

 

[anandpv2009]

Simple.
First you have to create a table for conversion (ASCII)
0x31-> 1
0x32-> 2
etc.

For two digit nums.
First_number * 10 + Second_number * 1
Eg
First num = 8
second num = 2
8*10 + 2*1 = 82


For 3 digit num
n1*100+n2*10+n3*1
and so on.


Good luck.

 

[Joyhtidas]

Hi...
Thank you for the idea......
Here in my program i will be storing the keypress in one array..
I am saving numbers.. between two variables say 'X' and 'Y'....so there will be n number of key press (maximum is 8 )...
so the count ranges from 1 to 8..then how (Forexample:- 1, 152, 26,360 )
we can calculate the result easily ....

 

[anandpv2009]

Hi...
Thank you for the idea......
Here in my program i will be storing the keypress in one array..
I am saving numbers.. between two variables say 'X' and 'Y'....so there will be n number of key press (maximum is 8 )...
so the count ranges from 1 to 8..then how (Forexample:- 1, 152, 26,360 )
we can calculate the result easily ....

Use the following technique.
If u pressed any key, say 1
then
1
" pressed another key, say 5
then
last result, 1*10+5*1 = 15
'' pressed another key say 7
last result, 15*10+7*1=157

and son on.

Last u have to press an enter key or Ok key in the keyboard,


Good luck,

 

[Joyhtidas]

Hi...
Thanks alot...
I will try this method