feat: implementing state machine and operative unit

proj/AudioProc.sim/sim_1/behav/xsim/xvhdl.pb

proj/AudioProc.sim/sim_1/behav/xsim/xvlog.log

proj/AudioProc.sim/sim_1/behav/xsim/xvlog.pb

proj/AudioProc.xpr

proj/cleanup.cmd

proj/cleanup.sh

proj/create_project.tcl

src-ref/ECG_raw_3filters-inc.pdf

src-ref/ECG_raw_3filters.tex

src-ref/coeficientes_vhdl.txt

src-ref/octaveScript.m

src/constraints/NexysVideo_Master.xdc

src/hdl/TWICtl.vhd

src/hdl/audioProc.v

src/hdl/audio_init.v

src/hdl/controlUnit.vhd

src/hdl/debounce.v

src/hdl/fir.vhd

src/hdl/firUnit.vhd

src/hdl/i2s_ctl.vhd