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Microcontroller Programming » Led Marquee and extra switches

February 02, 2010
by saleem
saleem's Avatar

Hi,

I would like to attach 2 switches on PD6 and PD7 (PINS) that are already connected to LED Col 10 and Col 11. I tried this but didn't work properly. Is there a way to isolate the switches and the columns. E.g Can I make PD6 and PD7 as inputs and when pressed make these PINs as outputs so that LEDs can work. Is this a possibility? Can someone shed light on this please.

I have made it to work by removing LED from PD7 and attaching a switch there but then I lose a column (2 columns).

Thx

Saleem

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