1 interrupt different alerts

[global]

Hello,

i want to use one interrupt, but that makes possible to check if it comes from an alert or another. I would like the interrupt to be different depending on which alert was setted.

It should be something pretty much like this :

[Ttelmah]

INT_EXT, is a single pin, so you can't have different interrupts from it, but what you can do, is implement a small piece of external logic, to generate the signals. Wha you need would depend on the nature of the signals (can they happen together, or only one at a time, what is the polarity etc.), but if (for instance), the signals are 'unique', then you could have an 'or' gate (assuming the signals are +ve logic), whose output feeds the interrupt pin, and then have the signals presented via a multiplexer to allow you to detect which one has occured.
Why not use the portB interrupt on change feature though?. This supports up to four pins, that will generate an interrupt if any one changes. You only then need to read the pins, look at which one has changed, and branch to the required code. This is built for this type of application...

Best Wishes

[global]

Thank you for your response.

I use an alarm on a DS1306 that generate an interrupt when i set an alarm on it.

For example, i take time now and then add 10 minutes. So the interrupt will be generated 10 minutes later.

I use only one alarm so on interrupt pin to seeif these 10 minutes are reached.

The problem is that i use this alarm of 10 minutes for different situations.

For example, i have sensors, if one sensor is up for 10 minutes it sets the interrupt.

The trouble is i would like to use it for different sensor for example, and if it is another sensor, i want to be able to know of which sensor it is because depending on this, i have different tasks ...

So i only have one interrupt but i'd like to know which one it is.

Is it more clearer ?

[Ttelmah]

So, how can you detect which device is involved?. If there is a signal wire from the device, connect this to another pin, poll this input inside the interrupt handler, and use this to determine what you do.

Best Wishes

[global]