String functions OR more room for arrays

ando

Hello,
I need more room for variables or I need to know if there are functions that can operate on strings. Like substr. With an LCD I would like to scroll a message back and fourth. picking which characters are on the screen needs to be taken care of by my code. So I thought I would store the whole message in 4 Nib arrays 13 chars long. Since I ran out of room I am hoping there is different method.

Joe

Jon Williams

This documentation has BS2 demo code that shows scrolling in an LCD.· There is no substr function -- you have to code it yourself (or modify our demo code).

http://www.parallax.com/dl/docs/prod/appmod/LcdTerminal.pdf


▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jon Williams
Applications Engineer, Parallax

ando

Jon,
I need my text to scroll in all directions up, dn, left, right. I figure it is going to be easier to just rewrite the whole lcd with my data. I may have overlooked the eprom space. I can store my full strings there. Then write my own substr. Is there a command I can use to shift or step through a string?

Jon Williams

If you look at that code you'll see that it is scrolling by writing a sub-section of the string. If you have multiple strings then you can scroll up/down using a similar techniques (pointer to target string and starting location).

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jon Williams
Applications Engineer, Parallax

ando

Thanks!
I got it working using the READ command

ando

Jon,
Thanks for all your help. I just got her all closed up. You can see the finished project here.

http://www.andomation.com/stuff/ouija/

Joe