Tie pin to interrupt

Discussion around product based on ARM Cortex M3 core.

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Tie pin to interrupt

Fri Jun 20, 2014 1:07 am


I'm using an Atmel SAM3U4E board, and I'm trying to get a UART interrupt to function so that I can only call UART reading code (in an ISR) when I get data.

A couple questions:

-Which bit of the ISER (interrupt enable register) do I set -- 1<<14 or 1<<(32-14) or whatever - or in other words, which bit would correspond to interrupt #14 (as this is what UART1 is defined as)

-Once that interrupt is enabled, how do I set it to enter the ISR once the UART receives data?

Any help would be great!


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