Camille Muller / mbed-rtos

Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard. Adaption for NUCLEO-L152RE

Dependents:   Polytech_tours

Fork of mbed-rtos by mbed official

rtx/TARGET_CORTEX_A/rt_Timer.c@49:77c8e4604045, 2014-11-06 (annotated)

Committer:
mbed_official
Date:
Thu Nov 06 13:00:11 2014 +0000
Revision:
49:77c8e4604045
Parent:
rtx_ca/rt_Timer.c@48:e9a2c7cb57a4 
Synchronized with git revision 7b90c2ba137baaf9769219e0e8a7b8e8d1299c4f



Full URL: https://github.com/mbedmicro/mbed/commit/7b90c2ba137baaf9769219e0e8a7b8e8d1299c4f/



This target is not yet tested, so it can't be released as part of the official

SDK build for now.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 48:e9a2c7cb57a4 1 /*----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 2 * RL-ARM - RTX
mbed_official 48:e9a2c7cb57a4 3 *----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 4 * Name: RT_TIMER.C
mbed_official 48:e9a2c7cb57a4 5 * Purpose: User timer functions
mbed_official 48:e9a2c7cb57a4 6 * Rev.: V4.60
mbed_official 48:e9a2c7cb57a4 7 *----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 8 *
mbed_official 48:e9a2c7cb57a4 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
mbed_official 48:e9a2c7cb57a4 10 * All rights reserved.
mbed_official 48:e9a2c7cb57a4 11 * Redistribution and use in source and binary forms, with or without
mbed_official 48:e9a2c7cb57a4 12 * modification, are permitted provided that the following conditions are met:
mbed_official 48:e9a2c7cb57a4 13 * - Redistributions of source code must retain the above copyright
mbed_official 48:e9a2c7cb57a4 14 * notice, this list of conditions and the following disclaimer.
mbed_official 48:e9a2c7cb57a4 15 * - Redistributions in binary form must reproduce the above copyright
mbed_official 48:e9a2c7cb57a4 16 * notice, this list of conditions and the following disclaimer in the
mbed_official 48:e9a2c7cb57a4 17 * documentation and/or other materials provided with the distribution.
mbed_official 48:e9a2c7cb57a4 18 * - Neither the name of ARM nor the names of its contributors may be used
mbed_official 48:e9a2c7cb57a4 19 * to endorse or promote products derived from this software without
mbed_official 48:e9a2c7cb57a4 20 * specific prior written permission.
mbed_official 48:e9a2c7cb57a4 21 *
mbed_official 48:e9a2c7cb57a4 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 48:e9a2c7cb57a4 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 48:e9a2c7cb57a4 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mbed_official 48:e9a2c7cb57a4 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mbed_official 48:e9a2c7cb57a4 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed_official 48:e9a2c7cb57a4 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed_official 48:e9a2c7cb57a4 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 48:e9a2c7cb57a4 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 48:e9a2c7cb57a4 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed_official 48:e9a2c7cb57a4 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 48:e9a2c7cb57a4 32 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 48:e9a2c7cb57a4 33 *---------------------------------------------------------------------------*/
mbed_official 48:e9a2c7cb57a4 34
mbed_official 48:e9a2c7cb57a4 35 #include "rt_TypeDef.h"
mbed_official 48:e9a2c7cb57a4 36 #include "RTX_Config.h"
mbed_official 48:e9a2c7cb57a4 37 #include "rt_Timer.h"
mbed_official 48:e9a2c7cb57a4 38 #include "rt_MemBox.h"
mbed_official 48:e9a2c7cb57a4 39
mbed_official 48:e9a2c7cb57a4 40
mbed_official 48:e9a2c7cb57a4 41 /*----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 42 * Global Variables
mbed_official 48:e9a2c7cb57a4 43 *---------------------------------------------------------------------------*/
mbed_official 48:e9a2c7cb57a4 44
mbed_official 48:e9a2c7cb57a4 45 /* User Timer list pointer */
mbed_official 48:e9a2c7cb57a4 46 struct OS_XTMR os_tmr;
mbed_official 48:e9a2c7cb57a4 47
mbed_official 48:e9a2c7cb57a4 48 /*----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 49 * Functions
mbed_official 48:e9a2c7cb57a4 50 *---------------------------------------------------------------------------*/
mbed_official 48:e9a2c7cb57a4 51
mbed_official 48:e9a2c7cb57a4 52 /*--------------------------- rt_tmr_tick -----------------------------------*/
mbed_official 48:e9a2c7cb57a4 53
mbed_official 48:e9a2c7cb57a4 54 void rt_tmr_tick (void) {
mbed_official 48:e9a2c7cb57a4 55 /* Decrement delta count of timer list head. Timers having the value of */
mbed_official 48:e9a2c7cb57a4 56 /* zero are removed from the list and the callback function is called. */
mbed_official 48:e9a2c7cb57a4 57 P_TMR p;
mbed_official 48:e9a2c7cb57a4 58
mbed_official 48:e9a2c7cb57a4 59 if (os_tmr.next == NULL) {
mbed_official 48:e9a2c7cb57a4 60 return;
mbed_official 48:e9a2c7cb57a4 61 }
mbed_official 48:e9a2c7cb57a4 62 os_tmr.tcnt--;
mbed_official 48:e9a2c7cb57a4 63 while (os_tmr.tcnt == 0 && (p = os_tmr.next) != NULL) {
mbed_official 48:e9a2c7cb57a4 64 /* Call a user provided function to handle an elapsed timer */
mbed_official 48:e9a2c7cb57a4 65 os_tmr_call (p->info);
mbed_official 48:e9a2c7cb57a4 66 os_tmr.tcnt = p->tcnt;
mbed_official 48:e9a2c7cb57a4 67 os_tmr.next = p->next;
mbed_official 48:e9a2c7cb57a4 68 rt_free_box ((U32 *)m_tmr, p);
mbed_official 48:e9a2c7cb57a4 69 }
mbed_official 48:e9a2c7cb57a4 70 }
mbed_official 48:e9a2c7cb57a4 71
mbed_official 48:e9a2c7cb57a4 72 /*--------------------------- rt_tmr_create ---------------------------------*/
mbed_official 48:e9a2c7cb57a4 73
mbed_official 48:e9a2c7cb57a4 74 OS_ID rt_tmr_create (U16 tcnt, U16 info) {
mbed_official 48:e9a2c7cb57a4 75 /* Create an user timer and put it into the chained timer list using */
mbed_official 48:e9a2c7cb57a4 76 /* a timeout count value of "tcnt". User parameter "info" is used as a */
mbed_official 48:e9a2c7cb57a4 77 /* parameter for the user provided callback function "os_tmr_call ()". */
mbed_official 48:e9a2c7cb57a4 78 P_TMR p_tmr, p;
mbed_official 48:e9a2c7cb57a4 79 U32 delta,itcnt = tcnt;
mbed_official 48:e9a2c7cb57a4 80
mbed_official 48:e9a2c7cb57a4 81 if (tcnt == 0 || m_tmr == NULL) {
mbed_official 48:e9a2c7cb57a4 82 return (NULL);
mbed_official 48:e9a2c7cb57a4 83 }
mbed_official 48:e9a2c7cb57a4 84 p_tmr = rt_alloc_box ((U32 *)m_tmr);
mbed_official 48:e9a2c7cb57a4 85 if (!p_tmr) {
mbed_official 48:e9a2c7cb57a4 86 return (NULL);
mbed_official 48:e9a2c7cb57a4 87 }
mbed_official 48:e9a2c7cb57a4 88 p_tmr->info = info;
mbed_official 48:e9a2c7cb57a4 89 p = (P_TMR)&os_tmr;
mbed_official 48:e9a2c7cb57a4 90 delta = p->tcnt;
mbed_official 48:e9a2c7cb57a4 91 while (delta < itcnt && p->next != NULL) {
mbed_official 48:e9a2c7cb57a4 92 p = p->next;
mbed_official 48:e9a2c7cb57a4 93 delta += p->tcnt;
mbed_official 48:e9a2c7cb57a4 94 }
mbed_official 48:e9a2c7cb57a4 95 /* Right place found, insert timer into the list */
mbed_official 48:e9a2c7cb57a4 96 p_tmr->next = p->next;
mbed_official 48:e9a2c7cb57a4 97 p_tmr->tcnt = (U16)(delta - itcnt);
mbed_official 48:e9a2c7cb57a4 98 p->next = p_tmr;
mbed_official 48:e9a2c7cb57a4 99 p->tcnt -= p_tmr->tcnt;
mbed_official 48:e9a2c7cb57a4 100 return (p_tmr);
mbed_official 48:e9a2c7cb57a4 101 }
mbed_official 48:e9a2c7cb57a4 102
mbed_official 48:e9a2c7cb57a4 103 /*--------------------------- rt_tmr_kill -----------------------------------*/
mbed_official 48:e9a2c7cb57a4 104
mbed_official 48:e9a2c7cb57a4 105 OS_ID rt_tmr_kill (OS_ID timer) {
mbed_official 48:e9a2c7cb57a4 106 /* Remove user timer from the chained timer list. */
mbed_official 48:e9a2c7cb57a4 107 P_TMR p, p_tmr;
mbed_official 48:e9a2c7cb57a4 108
mbed_official 48:e9a2c7cb57a4 109 p_tmr = (P_TMR)timer;
mbed_official 48:e9a2c7cb57a4 110 p = (P_TMR)&os_tmr;
mbed_official 48:e9a2c7cb57a4 111 /* Search timer list for requested timer */
mbed_official 48:e9a2c7cb57a4 112 while (p->next != p_tmr) {
mbed_official 48:e9a2c7cb57a4 113 if (p->next == NULL) {
mbed_official 48:e9a2c7cb57a4 114 /* Failed, "timer" is not in the timer list */
mbed_official 48:e9a2c7cb57a4 115 return (p_tmr);
mbed_official 48:e9a2c7cb57a4 116 }
mbed_official 48:e9a2c7cb57a4 117 p = p->next;
mbed_official 48:e9a2c7cb57a4 118 }
mbed_official 48:e9a2c7cb57a4 119 /* Timer was found, remove it from the list */
mbed_official 48:e9a2c7cb57a4 120 p->next = p_tmr->next;
mbed_official 48:e9a2c7cb57a4 121 p->tcnt += p_tmr->tcnt;
mbed_official 48:e9a2c7cb57a4 122 rt_free_box ((U32 *)m_tmr, p_tmr);
mbed_official 48:e9a2c7cb57a4 123 /* Timer killed */
mbed_official 48:e9a2c7cb57a4 124 return (NULL);
mbed_official 48:e9a2c7cb57a4 125 }
mbed_official 48:e9a2c7cb57a4 126
mbed_official 48:e9a2c7cb57a4 127 /*----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 128 * end of file
mbed_official 48:e9a2c7cb57a4 129 *---------------------------------------------------------------------------*/