add circleci

Author: Qinghao Shi

.circleci/config.yml

@@ -0,0 +1,23 @@
+# Python CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-python/ for more details
+#
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/python:3.6.1
+    working_directory: ~/repo
+    steps:
+      - checkout:
+
+      - run:
+          name: install dependencies
+          command: |
+            git clone https://github.com/ARMmbed/mbed-os.git
+            pip install -r mbed-os/requirements.txt
+
+      - run:
+          name: check files
+          command: |
+            mbed test --help