USBTTY, TIMEOUT command line parameters for test-enc.mk

Author: danielinux

tools/test-enc.mk

@@ -1,11 +1,10 @@
-ENC_TEST_UPDATE_VERSION=2
-SIGN_ARGS=
+ENC_TEST_UPDATE_VERSION?=2
 KEYGEN_TOOL=python3 ./tools/keytools/keygen.py
 SIGN_TOOL=python3 ./tools/keytools/sign.py
 SIGN_ARGS+=--ecc256 --encrypt /tmp/enc_key.der
 SIGN_ENC_ARGS+=--ecc256 --encrypt /tmp/enc_key.der
-USBTTY=/dev/ttyACM0
-TIMEOUT=60
+USBTTY?=/dev/ttyACM0
+TIMEOUT?=60
 
 .config:
 	@rm -f $@