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