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component/common/mbed/hal_ext/wdt_api.h

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+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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.
+ */
+#ifndef MBED_WATCHDOG_API_H
+#define MBED_WATCHDOG_API_H
+
+#include "device.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*wdt_irq_handler)(uint32_t id);
+
+/** Initial the watch dog time setting
+ *
+ * This function will initial and enable the watchdog timer with a given timeout value.
+ * When the watchdog timer timeout event is triggered, the system will be reset. User also can
+ * register a callback function to handle the watchdog timer timeout event.
+ */
+void watchdog_init(uint32_t timeout_ms);
+
+/** Start the watchdog counting
+ *
+ * This function will active the watchdog timer down counting. When the watchdog timer count down
+ * to 0, a callback function will be called or the system will be reset.
+ */
+void watchdog_start(void);
+
+/** Stop the watchdog counting
+ *
+ * This function will stop the watchdog timer down counting. If a user application aware a
+ * procedure may takes too long and cause the watchdog timer timeout, the application use this
+ * function to stop the watchdog timer to prevent the watchdog timer timeout.
+ */
+void watchdog_stop(void);
+
+/** Refresh the watchdog counting
+ *
+ * This function will reload the watchdog timer counting value. Usually a application do the watchdog
+ * timer reflash in the main loop to prevent the watchdog timer timeout.
+ */
+void watchdog_refresh(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif