Diff: mbed/hal/ticker_api.h

Revision:

0:d6c9b09b4042

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed/hal/ticker_api.h	Wed Dec 02 18:02:03 2020 +0000
@@ -0,0 +1,121 @@
+
+/** \addtogroup hal */
+/** @{*/
+/* mbed Microcontroller Library
+ * Copyright (c) 2015 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_TICKER_API_H
+#define MBED_TICKER_API_H
+
+#include <stdint.h>
+#include "device.h"
+
+typedef uint32_t timestamp_t;
+
+/** Ticker's event structure
+ */
+typedef struct ticker_event_s {
+    timestamp_t            timestamp; /**< Event's timestamp */
+    uint32_t               id;        /**< TimerEvent object */
+    struct ticker_event_s *next;      /**< Next event in the queue */
+} ticker_event_t;
+
+typedef void (*ticker_event_handler)(uint32_t id);
+
+/** Ticker's interface structure - required API for a ticker
+ */
+typedef struct {
+    void (*init)(void);                           /**< Init function */
+    uint32_t (*read)(void);                       /**< Read function */
+    void (*disable_interrupt)(void);              /**< Disable interrupt function */
+    void (*clear_interrupt)(void);                /**< Clear interrupt function */
+    void (*set_interrupt)(timestamp_t timestamp); /**< Set interrupt function */
+} ticker_interface_t;
+
+/** Ticker's event queue structure
+ */
+typedef struct {
+    ticker_event_handler event_handler; /**< Event handler */
+    ticker_event_t *head;               /**< A pointer to head */
+} ticker_event_queue_t;
+
+/** Ticker's data structure
+ */
+typedef struct {
+    const ticker_interface_t *interface; /**< Ticker's interface */
+    ticker_event_queue_t *queue;         /**< Ticker's event queue */
+} ticker_data_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \defgroup hal_ticker Ticker HAL functions
+ * @{
+ */
+
+/** Initialize a ticker and set the event handler
+ *
+ * @param data    The ticker's data
+ * @param handler A handler to be set
+ */
+void ticker_set_handler(const ticker_data_t *const data, ticker_event_handler handler);
+
+/** IRQ handler that goes through the events to trigger overdue events.
+ *
+ * @param data    The ticker's data
+ */
+void ticker_irq_handler(const ticker_data_t *const data);
+
+/** Remove an event from the queue
+ *
+ * @param data The ticker's data
+ * @param obj  The event object to be removed from the queue
+ */
+void ticker_remove_event(const ticker_data_t *const data, ticker_event_t *obj);
+
+/** Insert an event to the queue
+ *
+ * @param data      The ticker's data
+ * @param obj       The event object to be inserted to the queue
+ * @param timestamp The event's timestamp
+ * @param id        The event object
+ */
+void ticker_insert_event(const ticker_data_t *const data, ticker_event_t *obj, timestamp_t timestamp, uint32_t id);
+
+/** Read the current ticker's timestamp
+ *
+ * @param data The ticker's data
+ * @return The current timestamp
+ */
+timestamp_t ticker_read(const ticker_data_t *const data);
+
+/** Read the next event's timestamp
+ *
+ * @param data The ticker's data
+ * @return 1 if timestamp is pending event, 0 if there's no event pending
+ */
+int ticker_get_next_timestamp(const ticker_data_t *const data, timestamp_t *timestamp);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+/** @}*/