I can't see where the interrupt vectors are defined.
they are but, as Steve say, Start simple, first do 'blibky' to get the methodology, then cut cut your code down to one thing, make that work, add a thing, make that work, .....

i have had a look at your code and there is no glaring error

3 notes:
a) convert tabs to spaces before posting code
b) instead of EA off and on in every initializer, just initialize it at the emnd of all initialization
c) the interrupts are much more efficient if you add 'using'

Erik