📄 os_time.lst
字号:
C51 COMPILER V7.10 OS_TIME 08/23/2004 01:45:18 PAGE 1
C51 COMPILER V7.10, COMPILATION OF MODULE OS_TIME
OBJECT MODULE PLACED IN OS_TIME.OBJ
COMPILER INVOKED BY: D:\keil51\C51\BIN\C51.EXE OS_TIME.C BROWSE DEBUG OBJECTEXTEND
line level source
1 /*
2 *********************************************************************************************************
3 * uC/OS-II
4 * The Real-Time Kernel
5 * TIME MANAGEMENT
6 *
7 * (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
8 * All Rights Reserved
9 *
10 * V2.00
11 *
12 * File : OS_TIME.C
13 * By : Jean J. Labrosse
14 *********************************************************************************************************
15 */
16
17 #ifndef OS_MASTER_FILE
18 #include "includes.h"
19 #endif
20
21 /*
22 *********************************************************************************************************
23 * DELAY TASK 'n' TICKS (n from 0 to 65535)
24 *
25 * Description: This function is called to delay execution of the currently running task until the
26 * specified number of system ticks expires. This, of course, directly equates to delaying
27 * the current task for some time to expire. No delay will result If the specified delay is
28 * 0. If the specified delay is greater than 0 then, a context switch will result.
29 *
30 * Arguments : ticks is the time delay that the task will be suspended in number of clock 'ticks'.
31 * Note that by specifying 0, the task will not be delayed.
32 *
33 * Returns : none
34 *********************************************************************************************************
35 */
36 #if OS_Time_Dly_EN
void OSTimeDly (INT16U ticks)reentrant
{
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();
OSSched(); /* Find next task to run! */
}
}
#endif
50 /*$PAGE*/
51 /*
52 *********************************************************************************************************
53 * DELAY TASK FOR SPECIFIED TIME
54 *
55 * Description: This function is called to delay execution of the currently running task until some time
C51 COMPILER V7.10 OS_TIME 08/23/2004 01:45:18 PAGE 2
56 * expires. This call allows you to specify the delay time in HOURS, MINUTES, SECONDS and
57 * MILLISECONDS instead of ticks.
58 *
59 * Arguments : hours specifies the number of hours that the task will be delayed (max. is 255)
60 * minutes specifies the number of minutes (max. 59)
61 * seconds specifies the number of seconds (max. 59)
62 * milli specifies the number of milliseconds (max. 999)
63 *
64 * Returns : OS_NO_ERR
65 * OS_TIME_INVALID_MINUTES
66 * OS_TIME_INVALID_SECONDS
67 * OS_TIME_INVALID_MS
68 * OS_TIME_ZERO_DLY
69 *
70 * Note(s) : The resolution on the milliseconds depends on the tick rate. For example, you can't do
71 * a 10 mS delay if the ticker interrupts every 100 mS. In this case, the delay would be
72 * set to 0. The actual delay is rounded to the nearest tick.
73 *********************************************************************************************************
74 */
75 #if OS_Time_DlyHMSM_EN
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 = ticks / 65536L; /* Compute the integral number of 65536 tick delays */
ticks = ticks % 65536L; /* Obtain the fractional number of ticks */
OSTimeDly(ticks);
while (loops > 0) {
OSTimeDly(32768);
OSTimeDly(32768);
loops--;
}
return (OS_NO_ERR);
} else {
return (OS_TIME_ZERO_DLY);
}
}
#endif
110 /*$PAGE*/
111 /*
112 *********************************************************************************************************
113 * RESUME A DELAYED TASK
114 *
115 * Description: This function is used resume a task that has been delayed through a call to either
116 * OSTimeDly() or OSTimeDlyHMSM(). Note that you MUST NOT call this function to resume a
117 * task that is waiting for an event with timeout. This situation would make the task look
C51 COMPILER V7.10 OS_TIME 08/23/2004 01:45:18 PAGE 3
118 * like a timeout occurred (unless you desire this effect). Also, you cannot resume a task
119 * that has called OSTimeDlyHMSM() with a combined time that exceeds 65535 clock ticks. In
120 * other words, if the clock tick runs at 100 Hz then, you will not be able to resume a
121 * delayed task that called OSTimeDlyHMSM(0, 10, 55, 350) or higher.
122 *
123 * (10 Minutes * 60 + 55 Seconds + 0.35) * 100 ticks/second.
124 *
125 * Arguments : prio specifies the priority of the task to resume
126 *
127 * Returns : OS_NO_ERR Task has been resumed
128 * OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
129 * (i.e. >= OS_LOWEST_PRIO)
130 * OS_TIME_NOT_DLY Task is not waiting for time to expire
131 * OS_TASK_NOT_EXIST The desired task has not been created
132 *********************************************************************************************************
133 */
134 #if OS_Time_DlyResume_EN
INT8U OSTimeDlyResume (INT8U prio)reentrant
{
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)) { /* See if task is ready to run */
OSRdyGrp |= ptcb->OSTCBBitY; /* Make task ready to run */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
OS_EXIT_CRITICAL();
OSSched(); /* 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 */
}
} else {
OS_EXIT_CRITICAL();
return (OS_TASK_NOT_EXIST); /* The task does not exist */
}
}
#endif
167 /*$PAGE*/
168 /*
169 *********************************************************************************************************
170 * GET CURRENT SYSTEM TIME
171 *
172 * Description: This function is used by your application to obtain the current value of the 32-bit
173 * counter which keeps track of the number of clock ticks.
174 *
175 * Arguments : none
176 *
177 * Returns : The current value of OSTime
178 *********************************************************************************************************
179 */
C51 COMPILER V7.10 OS_TIME 08/23/2004 01:45:18 PAGE 4
180 #if OS_Time_Get_EN
INT32U OSTimeGet (void)reentrant
{
INT32U ticks;
OS_ENTER_CRITICAL();
ticks = OSTime;
OS_EXIT_CRITICAL();
return (ticks);
}
#endif
192
193 /*
194 *********************************************************************************************************
195 * SET SYSTEM CLOCK
196 *
197 * Description: This function sets the 32-bit counter which keeps track of the number of clock ticks.
198 *
199 * Arguments : ticks specifies the new value that OSTime needs to take.
200 *
201 * Returns : none
202 *********************************************************************************************************
203 */
204 #if OS_Time_Set_EN
void OSTimeSet (INT32U ticks)reentrant
{
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)
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -