📄 os_time.lst
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C51 COMPILER V7.20 OS_TIME 09/25/2006 10:08:40 PAGE 1
C51 COMPILER V7.20, COMPILATION OF MODULE OS_TIME
OBJECT MODULE PLACED IN OS_TIME.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE OS_TIME.C LARGE BROWSE DEBUG OBJECTEXTEND
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 #if OS_TIME_DLY_EN> 0
void OSTimeDly (INT16U ticks) reentrant
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
if (ticks > 0) { /* 0 means no delay! */
OS_ENTER_CRITICAL();
if ((OSRdyTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) { /* Delay current task */
OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
}
OSTCBCur->OSTCBDly = ticks; /* Load ticks in TCB */
OS_EXIT_CRITICAL();
OS_Sched(); /* Find next task to run! */
}
}
#endif
55 /*$PAGE*/
C51 COMPILER V7.20 OS_TIME 09/25/2006 10:08:40 PAGE 2
56 /*
57 *********************************************************************************************************
58 * DELAY TASK FOR SPECIFIED TIME
59 *
60 * Description: This function is called to delay execution of the currently running task until some time
61 * expires. This call allows you to specify the delay time in HOURS, MINUTES, SECONDS and
62 * MILLISECONDS instead of ticks.
63 *
64 * Arguments : hours specifies the number of hours that the task will be delayed (max. is 255)
65 * minutes specifies the number of minutes (max. 59)
66 * seconds specifies the number of seconds (max. 59)
67 * milli specifies the number of milliseconds (max. 999)
68 *
69 * Returns : OS_NO_ERR
70 * OS_TIME_INVALID_MINUTES
71 * OS_TIME_INVALID_SECONDS
72 * OS_TIME_INVALID_MS
73 * OS_TIME_ZERO_DLY
74 *
75 * Note(s) : The resolution on the milliseconds depends on the tick rate. For example, you can't do
76 * a 10 mS delay if the ticker interrupts every 100 mS. In this case, the delay would be
77 * set to 0. The actual delay is rounded to the nearest tick.
78 *********************************************************************************************************
79 */
80
81 #if OS_TIME_DLY_HMSM_EN > 0
INT8U OSTimeDlyHMSM (INT8U hours, INT8U minutes, INT8U seconds, INT16U milli) reentrant
{
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
115 /*$PAGE*/
116 /*
117 *********************************************************************************************************
C51 COMPILER V7.20 OS_TIME 09/25/2006 10:08:40 PAGE 3
118 * RESUME A DELAYED TASK
119 *
120 * Description: This function is used resume a task that has been delayed through a call to either
121 * OSTimeDly() or OSTimeDlyHMSM(). Note that you MUST NOT call this function to resume a
122 * task that is waiting for an event with timeout. This situation would make the task look
123 * like a timeout occurred (unless you desire this effect). Also, you cannot resume a task
124 * that has called OSTimeDlyHMSM() with a combined time that exceeds 65535 clock ticks. In
125 * other words, if the clock tick runs at 100 Hz then, you will not be able to resume a
126 * delayed task that called OSTimeDlyHMSM(0, 10, 55, 350) or higher.
127 *
128 * (10 Minutes * 60 + 55 Seconds + 0.35) * 100 ticks/second.
129 *
130 * Arguments : prio specifies the priority of the task to resume
131 *
132 * Returns : OS_NO_ERR Task has been resumed
133 * OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
134 * (i.e. >= OS_LOWEST_PRIO)
135 * OS_TIME_NOT_DLY Task is not waiting for time to expire
136 * OS_TASK_NOT_EXIST The desired task has not been created
137 *********************************************************************************************************
138 */
139
140 #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) == 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
175 /*$PAGE*/
176 /*
177 *********************************************************************************************************
178 * GET CURRENT SYSTEM TIME
179 *
C51 COMPILER V7.20 OS_TIME 09/25/2006 10:08:40 PAGE 4
180 * Description: This function is used by your application to obtain the current value of the 32-bit
181 * counter which keeps track of the number of clock ticks.
182 *
183 * Arguments : none
184 *
185 * Returns : The current value of OSTime
186 *********************************************************************************************************
187 */
188
189 #if OS_TIME_GET_SET_EN > 0
INT32U OSTimeGet (void) reentrant
{
#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
204
205 /*
206 *********************************************************************************************************
207 * SET SYSTEM CLOCK
208 *
209 * Description: This function sets the 32-bit counter which keeps track of the number of clock ticks.
210 *
211 * Arguments : ticks specifies the new value that OSTime needs to take.
212 *
213 * Returns : none
214 *********************************************************************************************************
215 */
216
217 #if OS_TIME_GET_SET_EN > 0
void OSTimeSet (INT32U ticks) reentrant
{
#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 = ---- ----
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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