Upgrade tooling (#400)

* upgrade tooling

* adds condition on nrfjprog

tools/perform_upgrade.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Creates a signature key and configures the public key.
+# The device will not be locked down for testing purposes.
+# Generates the binary and upgrades OpenSK.
+# To be run from the OpenSK base path.
+
+set -e
+
+BOARD="$1"
+
+./deploy.py --board=$BOARD --opensk --programmer=none
+python3 -m tools.deploy_partition --board=$BOARD
+if nrfjprog --reset --family NRF52 ; then
+  echo "Upgrade finished!"
+else
+  echo "Please replug OpenSK to reboot"
+fi