first commit

multi_timer.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2016 Zibin Zheng <znbin@qq.com>
+ * All rights reserved
+ */
+
+#include "multi_timer.h"
+
+//timer handle list head.
+static struct Timer* head_handle = NULL;
+
+//Timer ticks
+static uint32_t _timer_ticks = 0;
+
+/**
+  * @brief  Initializes the timer struct handle.
+  * @param  handle: the timer handle strcut.
+  * @param  timeout_cb: timeout callback.
+  * @param  repeat: repeat interval time.
+  * @retval None
+  */
+void timer_init(struct Timer* handle, void(*timeout_cb)(), uint32_t timeout, uint32_t repeat)
+{
+	// memset(handle, sizeof(struct Timer), 0);
+	handle->timeout_cb = timeout_cb;
+	handle->timeout = _timer_ticks + timeout;
+	handle->repeat = repeat;
+}
+
+/**
+  * @brief  Start the timer work, add the handle into work list.
+  * @param  btn: target handle strcut.
+  * @retval 0: succeed. -1: already exist.
+  */
+int timer_start(struct Timer* handle)
+{
+	struct Timer* target = head_handle;
+	while(target) {
+		if(target == handle) return -1;	//already exist.
+		target = target->next;
+	}
+	handle->next = head_handle;
+	head_handle = handle;
+	return 0;
+}
+
+/**
+  * @brief  Stop the timer work, remove the handle off work list.
+  * @param  handle: target handle strcut.
+  * @retval None
+  */
+void timer_stop(struct Timer* handle)
+{
+	struct Timer** curr;
+	for(curr = &head_handle; *curr; ) {
+		struct Timer* entry = *curr;
+		if (entry == handle) {
+			*curr = entry->next;
+//			free(entry);
+		} else
+			curr = &entry->next;
+	}
+}
+
+/**
+  * @brief  background ticks, timer repeat invoking interval 5ms.
+  * @param  None.
+  * @retval None
+  */
+void timer_loop()
+{
+	struct Timer* target;
+	for(target=head_handle; target; target=target->next) {
+		if(_timer_ticks >= target->timeout) {
+			if(target->repeat == 0) {
+				timer_stop(target);
+			} else {
+				target->timeout = _timer_ticks + target->repeat;
+			}
+			target->timeout_cb();
+		}
+	}
+}
+
+/**
+  * @brief  background ticks, timer repeat invoking interval 1ms.
+  * @param  None.
+  * @retval None
+  */
+void timer_ticks()
+{
+	_timer_ticks++;
+}
+

multi_timer.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2016 Zibin Zheng <znbin@qq.com>
+ * All rights reserved
+ */
+ 
+#ifndef _MULTI_TIMER_H_
+#define _MULTI_TIMER_H_
+
+#include "stdint.h"
+#include "string.h"
+
+typedef struct Timer {
+    uint32_t timeout;
+    uint32_t repeat;
+	void (*timeout_cb)(void);
+	struct Timer* next;
+}Timer;
+
+#ifdef __cplusplus  
+extern "C" {  
+#endif  
+
+void timer_init(struct Timer* handle, void(*timeout_cb)(), uint32_t timeout, uint32_t repeat);
+int  timer_start(struct Timer* handle);
+void timer_stop(struct Timer* handle);
+void timer_ticks(void);
+void timer_loop(void);
+
+// void timer_again(struct Timer* handle);
+// void timer_set_repeat(struct Timer* handle, uint32_t repeat);
+
+#ifdef __cplusplus
+} 
+#endif
+
+#endif