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if port A of ATMEGA16 is the input and is connected to the switch…..then how will i read the inputs..i mean wat should be the program code for it??PLS HELP…
since you are using a switch so the onput will be either +5 v or 0 v
so you can use two function to read the input
bit_is_set(parameter1,parametre2)
and
bit_is_clear(parameter1,parameter2)
U can make the port A pin as input as well as output…
For example
For reading as input.. put
DDRA=0x00;
u can refer the following link
http://www.engineersgarage.com/embedded/avr-microcontroller-projects/led-interface-circuit
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