Switch Detection

[Pranav Sewpersad]

Hello

I have a project where I need to redesign the tailight system for a car. I am using the Atmega8 microcontroller. The first part is the user input via switches. there are 5 different switches each performing different tasks(such as indicators brakes etc.). Some functions will have to work simultaneosly. I need some help with detecting the switches either using interrupts or polling.

NB:I have done a basic course on Avr so I dont now much and we cannot use Arduino

Thanks 

[Prabakaran P M]

Hi,

As we know there are two external interrupt pins in the atmega8, you have to go for polling for detecting 5 switches. my suggestion for you to choose Atmega 168/328 to make use of PIN change interrupt. 

[Pranav Sewpersad]

Thanks for the help.

I think polling will be a better option as I may need multiple functions at the same time. From my knolwedge polling will help with switch bouncing. 

Thanks

[Ashutosh Bhatt]

it depends upon what u want to do actually. for light and switch its simple input output devices. no need to have interrupts

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