?? os_time.lst
字號:
C51 COMPILER V8.02 OS_TIME 05/22/2008 18:01:53 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE OS_TIME
OBJECT MODULE PLACED IN OS_TIME.obj
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ucos\OS_TIME.C LARGE BROWSE INCDIR(.\dataflash;.\lcd;.\task;.\uart;.\ucos;.
-\key) DEBUG OBJECTEXTEND PRINT(.\OS_TIME.lst) OBJECT(OS_TIME.obj)
line level source
1 /*
2 *********************************************************************************************************
3 * uC/OS-II
4 * The Real-Time Kernel
5 * TIME MANAGEMENT
6 *
7 * (c) Copyright 1992-2002, 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 "includes.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) KCREENTRANT
36 {
37 1 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
38 1 OS_CPU_SR cpu_sr;
39 1 #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 05/22/2008 18:01:53 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
INT8U OSTimeDlyHMSM (INT8U hours, INT8U minutes, INT8U seconds, INT16U milli) KCREENTRANT
{
INT32U ticks;
INT16U loops;
if (hours > 0 || minutes > 0 || seconds > 0 || milli > 0) {
if (minutes > 59) {
return (OS_TIME_INVALID_MINUTES); /* Validate arguments to be within range */
}
if (seconds > 59) {
return (OS_TIME_INVALID_SECONDS);
}
if (milli > 999) {
return (OS_TIME_INVALID_MILLI);
}
/* Compute the total number of clock ticks required.. */
/* .. (rounded to the nearest tick) */
ticks = ((INT32U)hours * 3600L + (INT32U)minutes * 60L + (INT32U)seconds) * OS_TICKS_PER_SEC
+ OS_TICKS_PER_SEC * ((INT32U)milli + 500L / OS_TICKS_PER_SEC) / 1000L;
loops = (INT16U)(ticks / 65536L); /* Compute the integral number of 65536 tick delays */
ticks = ticks % 65536L; /* Obtain the fractional number of ticks */
OSTimeDly((INT16U)ticks);
while (loops > 0) {
OSTimeDly(32768);
OSTimeDly(32768);
loops--;
}
return (OS_NO_ERR);
}
return (OS_TIME_ZERO_DLY);
}
#endif
112 /*$PAGE*/
113 /*
114 *********************************************************************************************************
115 * RESUME A DELAYED TASK
116 *
C51 COMPILER V8.02 OS_TIME 05/22/2008 18:01:53 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) KCREENTRANT
{
#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) == OS_STAT_RDY) { /* 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 05/22/2008 18:01:53 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
INT32U OSTimeGet (void) KCREENTRANT
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
INT32U ticks;
OS_ENTER_CRITICAL();
ticks = OSTime;
OS_EXIT_CRITICAL();
return (ticks);
}
#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
void OSTimeSet (INT32U ticks) KCREENTRANT
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_ENTER_CRITICAL();
OSTime = ticks;
OS_EXIT_CRITICAL();
}
#endif
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 132 ----
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)
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