General GPIO/EXTI interrupt question

Posted on May 17, 2011 at 14:12

Ahh, good tip about the timers, thanks!

> If you need a lot of external interrupts, remenber that you

> can use each input capture from each Timer as an interrupt

> on rising or falling edge.

>

> Best regards

>

> Eric

Posted on May 17, 2011 at 14:12

Hello,

It's a compromise by ST. If you want that each pin of each port can generate its own interrupt, with 7 ports on 144 pins device, you obtain a total of 112 interrupts vectors. I don't know any application with 112 external interrupts.

If you need a lot of external interrupts, remenber that you can use each input capture from each Timer as an interrupt on rising or falling edge.

Best regards

Eric