main stripped of unnecessary junk
ok-ish

ekg capture runs, appear to fix fault issue. optfft still broken
changed ekg raw data to signed int.

next step: remove adc int handler, put in capture loop.
ekg capture now captures in runfunc, not int

also referencing global data in process
Revert "ekg capture now captures in runfunc, not int"

This reverts commit 0b7711c8d78c86f99a20c8ea8da93bc0190cbd08.
didn't work I think