mirror of
https://github.com/ARMmbed/DAPLink.git
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117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/**
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* @file rt_Timer.c
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* @brief
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*
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* DAPLink Interface Firmware
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* Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "rt_TypeDef.h"
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#include "RTX_Config.h"
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#include "rt_Timer.h"
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#include "rt_MemBox.h"
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/*----------------------------------------------------------------------------
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* Global Variables
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*---------------------------------------------------------------------------*/
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/* User Timer list pointer */
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struct OS_XTMR os_tmr;
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/*----------------------------------------------------------------------------
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* Functions
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*---------------------------------------------------------------------------*/
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/*--------------------------- rt_tmr_tick -----------------------------------*/
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void rt_tmr_tick (void) {
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/* Decrement delta count of timer list head. Timers having the value of */
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/* zero are removed from the list and the callback function is called. */
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P_TMR p;
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if (os_tmr.next == NULL) {
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return;
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}
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os_tmr.tcnt--;
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while (os_tmr.tcnt == 0 && (p = os_tmr.next) != NULL) {
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/* Call a user provided function to handle an elapsed timer */
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os_tmr_call (p->info);
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os_tmr.tcnt = p->tcnt;
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os_tmr.next = p->next;
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rt_free_box ((U32 *)m_tmr, p);
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}
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}
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/*--------------------------- rt_tmr_create ---------------------------------*/
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OS_ID rt_tmr_create (U16 tcnt, U16 info) {
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/* Create an user timer and put it into the chained timer list using */
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/* a timeout count value of "tcnt". User parameter "info" is used as a */
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/* parameter for the user provided callback function "os_tmr_call ()". */
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P_TMR p_tmr, p;
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U32 delta,itcnt = tcnt;
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if (tcnt == 0 || m_tmr == NULL) {
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return (NULL);
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}
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p_tmr = rt_alloc_box ((U32 *)m_tmr);
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if (!p_tmr) {
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return (NULL);
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}
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p_tmr->info = info;
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p = (P_TMR)&os_tmr;
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delta = p->tcnt;
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while (delta < itcnt && p->next != NULL) {
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p = p->next;
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delta += p->tcnt;
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}
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/* Right place found, insert timer into the list */
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p_tmr->next = p->next;
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p_tmr->tcnt = (U16)(delta - itcnt);
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p->next = p_tmr;
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p->tcnt -= p_tmr->tcnt;
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return (p_tmr);
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}
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/*--------------------------- rt_tmr_kill -----------------------------------*/
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OS_ID rt_tmr_kill (OS_ID timer) {
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/* Remove user timer from the chained timer list. */
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P_TMR p, p_tmr;
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p_tmr = (P_TMR)timer;
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p = (P_TMR)&os_tmr;
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/* Search timer list for requested timer */
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while (p->next != p_tmr) {
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if (p->next == NULL) {
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/* Failed, "timer" is not in the timer list */
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return (p_tmr);
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}
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p = p->next;
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}
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/* Timer was found, remove it from the list */
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p->next = p_tmr->next;
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p->tcnt += p_tmr->tcnt;
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rt_free_box ((U32 *)m_tmr, p_tmr);
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/* Timer killed */
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return (NULL);
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}
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/*----------------------------------------------------------------------------
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* end of file
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*---------------------------------------------------------------------------*/
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