Import Mbed OS hard-float snapshot

drivers/source/SerialWireOutput.cpp

@@ -0,0 +1,41 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017-2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+#include "drivers/SerialWireOutput.h"
+
+#if defined(DEVICE_ITM)
+
+#include "hal/itm_api.h"
+
+namespace mbed {
+
+SerialWireOutput::SerialWireOutput()
+{
+    /* Initialize ITM using internal init function. */
+    mbed_itm_init();
+}
+
+ssize_t SerialWireOutput::write(const void *buffer, size_t size)
+{
+    mbed_itm_send_block(ITM_PORT_SWO, buffer, size);
+
+    return size;
+}
+
+} // namespace mbed
+
+#endif // DEVICE_ITM