Switch and a LED with Atmega128 Breakout Revision as of 16:34, 5 April 2016 by Raghavendra (Talk | contribs) (diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Now we will control the LED depending on external input. In this tutorial we will interface a switch to one of the port pin and display its status on LED connected to other port.

Basics

For this tutorial we will a connect a switch to PORT C0 and LED to PORT B0 of Atmega128. W will configure PORT A0 as input to read the switch status and PORT C0 as outputto display the switch status on LED. Initially LED will be ON , when we press switch the LED will be OFF.
Refer the AVR I/O Register Configuration tutorial for basics of GPIO register configuration.

Hook Up

Demo