OS_TIME.lst
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嵌入式/单片机编程
开发平台:
Visual C++
- C51 COMPILER V8.02 OS_TIME 06/22/2006 11:44:40 PAGE 1
- C51 COMPILER V8.02, COMPILATION OF MODULE OS_TIME
- OBJECT MODULE PLACED IN .objOS_TIME.obj
- COMPILER INVOKED BY: C:KeilC51BINC51.EXE uCosiiOS_TIME.C LARGE BROWSE DEBUG OBJECTEXTEND PRINT(.lstOS_TIME.lst) O
- -BJECT(.objOS_TIME.obj)
- line level source
- 1 /*
- 2 *********************************************************************************************************
- 3 * uC/OS-II
- 4 * The Real-Time Kernel
- 5 * TIME MANAGEMENT
- 6 *
- 7 * (c) Copyright 1992-2001, Jean J. Labrosse, Weston, FL
- 8 * All Rights Reserved
- 9 *
- 10 * File : OS_TIME.C
- 11 * By : Jean J. Labrosse
- 12 *********************************************************************************************************
- 13 */
- 14
- 15 #ifndef OS_MASTER_FILE
- 16 #include "sourceincludes.h"
- 17 #endif
- 18
- 19 /*
- 20 *********************************************************************************************************
- 21 * DELAY TASK 'n' TICKS (n from 0 to 65535)
- 22 *
- 23 * Description: This function is called to delay execution of the currently running task until the
- 24 * specified number of system ticks expires. This, of course, directly equates to delaying
- 25 * the current task for some time to expire. No delay will result If the specified delay is
- 26 * 0. If the specified delay is greater than 0 then, a context switch will result.
- 27 *
- 28 * Arguments : ticks is the time delay that the task will be suspended in number of clock 'ticks'.
- 29 * Note that by specifying 0, the task will not be delayed.
- 30 *
- 31 * Returns : none
- 32 *********************************************************************************************************
- 33 */
- 34
- 35 void OSTimeDly (INT16U ticks) reentrant
- 36 {
- 37 1 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
- OS_CPU_SR cpu_sr;
- #endif
- 40 1
- 41 1
- 42 1 if (ticks > 0) { /* 0 means no delay! */
- 43 2 OS_ENTER_CRITICAL();
- 44 2 if ((OSRdyTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) { /* Delay current task */
- 45 3 OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
- 46 3 }
- 47 2 OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
- 48 2 OS_EXIT_CRITICAL();
- 49 2 OS_Sched(); /* Find next task to run! */
- 50 2 }
- 51 1 }
- 52 /*$PAGE*/
- 53 /*
- 54 *********************************************************************************************************
- C51 COMPILER V8.02 OS_TIME 06/22/2006 11:44:40 PAGE 2
- 55 * DELAY TASK FOR SPECIFIED TIME
- 56 *
- 57 * Description: This function is called to delay execution of the currently running task until some time
- 58 * expires. This call allows you to specify the delay time in HOURS, MINUTES, SECONDS and
- 59 * MILLISECONDS instead of ticks.
- 60 *
- 61 * Arguments : hours specifies the number of hours that the task will be delayed (max. is 255)
- 62 * minutes specifies the number of minutes (max. 59)
- 63 * seconds specifies the number of seconds (max. 59)
- 64 * milli specifies the number of milliseconds (max. 999)
- 65 *
- 66 * Returns : OS_NO_ERR
- 67 * OS_TIME_INVALID_MINUTES
- 68 * OS_TIME_INVALID_SECONDS
- 69 * OS_TIME_INVALID_MS
- 70 * OS_TIME_ZERO_DLY
- 71 *
- 72 * Note(s) : The resolution on the milliseconds depends on the tick rate. For example, you can't do
- 73 * a 10 mS delay if the ticker interrupts every 100 mS. In this case, the delay would be
- 74 * set to 0. The actual delay is rounded to the nearest tick.
- 75 *********************************************************************************************************
- 76 */
- 77
- 78 #if OS_TIME_DLY_HMSM_EN > 0
- 79 INT8U OSTimeDlyHMSM (INT8U hours, INT8U minutes, INT8U seconds, INT16U milli) reentrant
- 80 {
- 81 1 INT32U ticks;
- 82 1 INT16U loops;
- 83 1
- 84 1
- 85 1 if (hours > 0 || minutes > 0 || seconds > 0 || milli > 0) {
- 86 2 if (minutes > 59) {
- 87 3 return (OS_TIME_INVALID_MINUTES); /* Validate arguments to be within range */
- 88 3 }
- 89 2 if (seconds > 59) {
- 90 3 return (OS_TIME_INVALID_SECONDS);
- 91 3 }
- 92 2 if (milli > 999) {
- 93 3 return (OS_TIME_INVALID_MILLI);
- 94 3 }
- 95 2 /* Compute the total number of clock ticks required.. */
- 96 2 /* .. (rounded to the nearest tick) */
- 97 2 ticks = ((INT32U)hours * 3600L + (INT32U)minutes * 60L + (INT32U)seconds) * OS_TICKS_PER_SEC
- 98 2 + OS_TICKS_PER_SEC * ((INT32U)milli + 500L / OS_TICKS_PER_SEC) / 1000L;
- 99 2 loops = (INT16U)(ticks / 65536L); /* Compute the integral number of 65536 tick delays */
- 100 2 ticks = ticks % 65536L; /* Obtain the fractional number of ticks */
- 101 2 OSTimeDly((INT16U)ticks);
- 102 2 while (loops > 0) {
- 103 3 OSTimeDly(32768);
- 104 3 OSTimeDly(32768);
- 105 3 loops--;
- 106 3 }
- 107 2 return (OS_NO_ERR);
- 108 2 }
- 109 1 return (OS_TIME_ZERO_DLY);
- 110 1 }
- 111 #endif
- 112 /*$PAGE*/
- 113 /*
- 114 *********************************************************************************************************
- 115 * RESUME A DELAYED TASK
- 116 *
- C51 COMPILER V8.02 OS_TIME 06/22/2006 11:44:40 PAGE 3
- 117 * Description: This function is used resume a task that has been delayed through a call to either
- 118 * OSTimeDly() or OSTimeDlyHMSM(). Note that you MUST NOT call this function to resume a
- 119 * task that is waiting for an event with timeout. This situation would make the task look
- 120 * like a timeout occurred (unless you desire this effect). Also, you cannot resume a task
- 121 * that has called OSTimeDlyHMSM() with a combined time that exceeds 65535 clock ticks. In
- 122 * other words, if the clock tick runs at 100 Hz then, you will not be able to resume a
- 123 * delayed task that called OSTimeDlyHMSM(0, 10, 55, 350) or higher.
- 124 *
- 125 * (10 Minutes * 60 + 55 Seconds + 0.35) * 100 ticks/second.
- 126 *
- 127 * Arguments : prio specifies the priority of the task to resume
- 128 *
- 129 * Returns : OS_NO_ERR Task has been resumed
- 130 * OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
- 131 * (i.e. >= OS_LOWEST_PRIO)
- 132 * OS_TIME_NOT_DLY Task is not waiting for time to expire
- 133 * OS_TASK_NOT_EXIST The desired task has not been created
- 134 *********************************************************************************************************
- 135 */
- 136
- 137 #if OS_TIME_DLY_RESUME_EN > 0
- INT8U OSTimeDlyResume (INT8U prio) reentrant
- {
- #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
- OS_CPU_SR cpu_sr;
- #endif
- OS_TCB *ptcb;
- if (prio >= OS_LOWEST_PRIO) {
- return (OS_PRIO_INVALID);
- }
- OS_ENTER_CRITICAL();
- ptcb = (OS_TCB *)OSTCBPrioTbl[prio]; /* Make sure that task exist */
- if (ptcb != (OS_TCB *)0) {
- if (ptcb->OSTCBDly != 0) { /* See if task is delayed */
- ptcb->OSTCBDly = 0; /* Clear the time delay */
- if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) == 0x00) { /* See if task is ready to run */
- OSRdyGrp |= ptcb->OSTCBBitY; /* Make task ready to run */
- OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
- OS_EXIT_CRITICAL();
- OS_Sched(); /* See if this is new highest priority */
- } else {
- OS_EXIT_CRITICAL(); /* Task may be suspended */
- }
- return (OS_NO_ERR);
- } else {
- OS_EXIT_CRITICAL();
- return (OS_TIME_NOT_DLY); /* Indicate that task was not delayed */
- }
- }
- OS_EXIT_CRITICAL();
- return (OS_TASK_NOT_EXIST); /* The task does not exist */
- }
- #endif
- 172 /*$PAGE*/
- 173 /*
- 174 *********************************************************************************************************
- 175 * GET CURRENT SYSTEM TIME
- 176 *
- 177 * Description: This function is used by your application to obtain the current value of the 32-bit
- 178 * counter which keeps track of the number of clock ticks.
- C51 COMPILER V8.02 OS_TIME 06/22/2006 11:44:40 PAGE 4
- 179 *
- 180 * Arguments : none
- 181 *
- 182 * Returns : The current value of OSTime
- 183 *********************************************************************************************************
- 184 */
- 185
- 186 #if OS_TIME_GET_SET_EN > 0
- 187 INT32U OSTimeGet (void) reentrant
- 188 {
- 189 1 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
- OS_CPU_SR cpu_sr;
- #endif
- 192 1 INT32U ticks;
- 193 1
- 194 1
- 195 1 OS_ENTER_CRITICAL();
- 196 1 ticks = OSTime;
- 197 1 OS_EXIT_CRITICAL();
- 198 1 return (ticks);
- 199 1 }
- 200 #endif
- 201
- 202 /*
- 203 *********************************************************************************************************
- 204 * SET SYSTEM CLOCK
- 205 *
- 206 * Description: This function sets the 32-bit counter which keeps track of the number of clock ticks.
- 207 *
- 208 * Arguments : ticks specifies the new value that OSTime needs to take.
- 209 *
- 210 * Returns : none
- 211 *********************************************************************************************************
- 212 */
- 213
- 214 #if OS_TIME_GET_SET_EN > 0
- 215 void OSTimeSet (INT32U ticks) reentrant
- 216 {
- 217 1 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
- OS_CPU_SR cpu_sr;
- #endif
- 220 1
- 221 1
- 222 1 OS_ENTER_CRITICAL();
- 223 1 OSTime = ticks;
- 224 1 OS_EXIT_CRITICAL();
- 225 1 }
- 226 #endif
- MODULE INFORMATION: STATIC OVERLAYABLE
- CODE SIZE = 689 ----
- CONSTANT SIZE = ---- ----
- XDATA SIZE = ---- ----
- PDATA SIZE = ---- ----
- DATA SIZE = ---- ----
- IDATA SIZE = ---- ----
- BIT SIZE = ---- ----
- END OF MODULE INFORMATION.
- C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)