I'm new on dsp programming and I'm trying to develope an application using ti f2812 dps.
I'm developing a current controller for a 2phase hybrid stepper motor. I use a Spectrum Digital
evaluation board ezdsp f2812. My application needs to use an external interrupt as trigger.
Since I don't know how to treat HWI, I'm actually trying to write an easy program just to
understand how it works. I want to use external interrupt XINT1. 
Which HWI object in DSP/BIOS is related to this interrupt??
I mean: which HWI object function do I have to define in order to be invoked when 3.3 V are fed
on the XINT1 pin?

I was trying to read documentation about those subjects but I didn't find anything useful for
my purpose. Please answer my question.

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