add: virtual DAC (100%) and ADC (80%)

upd: makefile

designs/reflectometer_base/Makefile

@@ -17,6 +17,8 @@ RTL_DIR = ../../rtl
 include ../../scripts/vivado.mk
 
 SYN_FILES += reflectometer.sv
+SYN_FILES += dac_model.sv
+SYN_FILES += adc_model.sv
 SYN_FILES += tb_reflectometer.sv
 SYN_FILES += $(sort $(shell find ../../rtl -type f \( -name '*.v' -o -name '*.sv' \)))