On Tue, Dec 23, 2008 at 5:33 PM, Bob Blick <bobblick@ftml.net> wrote:
> Why not just connect both the LEDS and the LCD at the same time? As long
> as you don't pull the LCD's EN pin high, you can wiggle the LEDs all you
> want on the other pins and the LCD will ignore it. When you do
> operations on the LCD you will see a little shimmer on the LEDs but if
> it's just your development system you know why they shimmer so it isn't
> a "problem" like it would appear to an end user.
>
> You can use them both at the same time, just remember the state you want
> the LEDs to be in, and after driving the LCD, return the port to that
> state.
>
> If you really want to use all 8 pins of a port for LEDs, use a pin from
> a different port for LCD EN.
>
> I did this, and also used the same pins for keyboard input, and also
> switch input, for a total of four functions from the same pins. Look at
> the code here if you are interested(it's old and for a 16F84 but it's
> good code, and in PICC):
>
> http://bobblick.com/techref/projects/lcdterm/lcdterm.html
>
> Cheers,
>
> Bob

Thanks for the c source code. The logic there is very useful.

Note: Right now I'm trying to mix assembler and C to maximize code
size and efficiency.

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solarwind
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