fix some bugs and pass lint check

Makefile

@@ -50,9 +50,11 @@ VERILATOR_FLAGS += --assert
 #VERILATOR_FLAGS += --debug
 # Add this trace to get a backtrace in gdb
 #VERILATOR_FLAGS += --gdbbt
-
+# Specify top module
+TOP_MODULE = isp
+VERILATOR_FLAGS += -top $(TOP_MODULE)
 # Input files for Verilator
-VERILATOR_INPUT = -top isp isp.v sc_main.cpp ./CFA/demosaic2.v
+VERILATOR_INPUT = isp.v sc_main.cpp ./Demosaic/demosaic2.v ./Crop/*.v ./FIFO/*.v ./Merge/*.v ./RAM/*.v
 
 # Check if SC exists via a verilator call (empty if not)
 SYSTEMC_EXISTS := $(shell $(VERILATOR) --get-supported SYSTEMC)
@@ -80,7 +82,7 @@ run:
 # 2. Or, run the make rules Verilator does:
 #	$(MAKE) -j -C obj_dir -f Vtop.mk
 # 3. Or, call a submakefile where we can override the rules ourselves:
-	$(MAKE) -j -C obj_dir -f ../Makefile_obj
+	$(MAKE) -j -C obj_dir -f V$(TOP_MODULE).mk
 
 	@echo
 	@echo "-- RUN ---------------------"