diff --git a/Makefile b/Makefile
index ea4310f..a2b9653 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,11 @@
-TARGET=g40130x
+TARGET=g401201
 UV4=/C/Keil/UV4/Uv4.exe
 
+SALT_KEY=.sign_salt
+
+SIGN_201=./g401302/outFlow/G401302_flow.bin
+SIGN201_FILE=./g401302/outFlow/G401302.sign
+
 .PHONY: clean all
 
 timer: clean
@@ -11,6 +16,10 @@
 	@echo "build shu version ..."
 	$(UV4) -cr -j0 -b g401302/project/g401302.uvproj -t"flow" -o"outFlow/OUTPUTFILE.TXT"
 	
+sign:
+	@echo "calc upgrade file sign ..."
+	cat $(SIGN_201) $(SALT_KEY) | sha256sum - | cut -d' ' -f 1 | tr -d '\n' > $(SIGN201_FILE)
+	
 all: timer flow
 
 clean: