Import Mbed OS hard-float snapshot

drivers/source/Watchdog.cpp

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2018-2019 Arm Limited and affiliates.
+ * 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.
+ */
+#ifdef DEVICE_WATCHDOG
+
+#include "drivers/Watchdog.h"
+
+namespace mbed {
+
+Watchdog::Watchdog() : _running(false)
+{
+}
+
+Watchdog::~Watchdog()
+{
+}
+
+bool Watchdog::start(uint32_t timeout)
+{
+    MBED_ASSERT(timeout <= get_max_timeout());
+    MBED_ASSERT(timeout > 0);
+
+    core_util_critical_section_enter();
+    watchdog_config_t config;
+    config.timeout_ms = timeout;
+    watchdog_status_t sts = hal_watchdog_init(&config);
+    if (sts == WATCHDOG_STATUS_OK) {
+        _running = true;
+    }
+    core_util_critical_section_exit();
+    return (sts == WATCHDOG_STATUS_OK);
+}
+
+bool Watchdog::start()
+{
+
+    return start(get_max_timeout());
+}
+
+bool Watchdog::stop()
+{
+    watchdog_status_t sts;
+    bool msts = true;
+    core_util_critical_section_enter();
+    if (_running) {
+        sts = hal_watchdog_stop();
+        if (sts != WATCHDOG_STATUS_OK) {
+            msts = false;
+        } else {
+            _running = false;
+        }
+
+    } else {
+        msts = false;
+    }
+    core_util_critical_section_exit();
+    return msts;
+}
+
+void Watchdog::kick()
+{
+    core_util_critical_section_enter();
+    hal_watchdog_kick();
+    core_util_critical_section_exit();
+}
+
+bool Watchdog::is_running() const
+{
+    return _running;
+}
+
+uint32_t Watchdog::get_timeout() const
+{
+    return hal_watchdog_get_reload_value();
+}
+
+uint32_t Watchdog::get_max_timeout() const
+{
+    const watchdog_features_t features = hal_watchdog_get_platform_features();
+    return features.max_timeout;
+}
+
+} // namespace mbed
+
+
+#endif // DEVICE_WATCHDOG