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creating menus and display it on LCD

 
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hayee



Joined: 05 Sep 2007
Posts: 252

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creating menus and display it on LCD
PostPosted: Sun Sep 16, 2007 9:56 pm     Reply with quote
Hi,
I am using PIC16f877a,ccs compiler (version 4.020).i want to know something.i want to create menus which can be displayed on LCD.i am using LCD (LMB202D) which is 20x2.actually i want to create different menus which shows me different values like
1-input voltage
2-output voltage
3-input Vmin and Vmax range
4-output Vmin and Vmax range

when i enter in one of the above menu it will show me some data regarding to the menu name.
i hope u guys will understand my question.can anyone tell me how can i do this or anyone have any example.
Foppie



Joined: 16 Sep 2005
Posts: 138
Location: The Netherlands

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PostPosted: Mon Sep 17, 2007 1:14 am     Reply with quote
you could do the following, however this is not really a menu.

You could make a global variable declaring your LCDstate and an button interrupt increasing this variable on each button press with one.

from your main you can than call a update_LCD function that could look like this:
Code:
void lcd_update()
{
   switch (lcd_state)
   {
      case 0:
         printf(lcd_putc, "\fyour startup screen");
      break;
      case 1:
         printf(lcd_putc, "\finput voltage\n%u", input_voltage);
      break;
      default:
         lcd_state = 0; //makes the lcd cycle complete
      break;
   }
}
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