Added first simple implementation of Fault confinement test.

Implementation of Error validation, Interrupt drivers
and Error capture still missing.

Covered only error counters and fault confinement state!

test/unit/Fault_confinement/fault_conf_unit.tcl

+################################################################################
+## 
+## CAN with Flexible Data-Rate IP Core 
+## 
+## Copyright (C) 2017 Ondrej Ille <ondrej.ille@gmail.com>
+## 
+## Project advisor: Jiri Novak <jnovak@fel.cvut.cz>
+## Department of Measurement         (http://meas.fel.cvut.cz/)
+## Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+## Czech Technical University        (http://www.cvut.cz/)
+## 
+## Permission is hereby granted, free of charge, to any person obtaining a copy 
+## of this VHDL component and associated documentation files (the "Component"), 
+## to deal in the Component without restriction, including without limitation 
+## the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+## and/or sell copies of the Component, and to permit persons to whom the 
+## Component is furnished to do so, subject to the following conditions:
+## 
+## The above copyright notice and this permission notice shall be included in 
+## all copies or substantial portions of the Component.
+## 
+## THE COMPONENT IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+## AUTHORS OR COPYRIGHTHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+## FROM, OUT OF OR IN CONNECTION WITH THE COMPONENT OR THE USE OR OTHER DEALINGS 
+## IN THE COMPONENT.
+## 
+## The CAN protocol is developed by Robert Bosch GmbH and protected by patents. 
+## Anybody who wants to implement this IP core on silicon has to obtain a CAN 
+## protocol license from Bosch.
+## 
+################################################################################
+
+################################################################################
+## Description:
+## 			CRC unit test handling script
+################################################################################
+global TCOMP
+
+start_CAN_simulation "Fault_confinement_unit_test_wrapper"
+
+################################################################################
+# Adding the waves
+################################################################################
+
+# Add common waves for each test entity
+add_test_status_waves
+add_system_waves
+
+# Driving bus signals
+add wave -decimal -label "Error warning limit" $TCOMP/drv_ewl
+add wave -decimal -label "Error passive" $TCOMP/drv_erp
+add wave -decimal -label "Counter preset value" $TCOMP/drv_ctr_val
+add wave -label "Counter preset target" $TCOMP/drv_ctr_sel
+
+# Increment / Decrement error counters!
+add wave -label "Increment one" $TCOMP/inc_one
+add wave -label "Increment eight" $TCOMP/inc_eight
+add wave -label "Decrement one" $TCOMP/dec_one
+
+# Add error counter related values
+add wave -noupdate -divider -height 20 "Error (Fault confinement) counters"
+add wave -decimal -label "TX Error counter" $TCOMP/tx_counter_out
+add wave -decimal -label "RX Error counter" $TCOMP/rx_counter_out
+add wave -decimal -label "Nominal Error counter" $TCOMP/err_counter_norm_out
+add wave -decimal -label "FD Error counter" $TCOMP/err_counter_fd_out
+add wave -decimal -label "Fault conf. state" $TCOMP/error_state_out
+
+# Testbench internal signals
+add wave -noupdate -divider -height 20 "Testbench modeled counters"
+add wave -label "TX Error counter" $TCOMP/tx_err_model
+add wave -label "RX Error counter" $TCOMP/rx_err_model
+add wave -label "Nominal Error counter" $TCOMP/norm_err_model
+add wave -label "FD Error counter" $TCOMP/fd_err_model
+add wave -decimal -label "Fault conf. state" $TCOMP/fc_model
+
+									 
+################################################################################
+# Execute the simulation, gather results
+################################################################################
+run_simulation
+get_test_results
+
+