📄 ucos_ii.lst
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9 =1 *
10 =1 * V2.00
11 =1 *
12 =1 * File : OS_CORE.C
13 =1 * By : Jean J. Labrosse
14 =1 *********************************************************************************************************
15 =1 */
16 =1
17 =1 #ifndef OS_MASTER_FILE
=1 #define OS_GLOBALS
=1 #include "includes.h"
=1 #endif
21 =1
22 =1 /*
23 =1 *********************************************************************************************************
24 =1 * LOCAL GLOBAL VARIABLES
25 =1 *********************************************************************************************************
26 =1 */
27 =1
28 =1 static INT8U OSIntExitY; /* Variable used by 'OSIntExit' to prevent using locals */
29 =1
30 =1 static OS_STK OSTaskIdleStk[OS_TASK_IDLE_STK_SIZE]; /* Idle task stack */
31 =1
32 =1 #if OS_TASK_STAT_EN
=1 static OS_STK OSTaskStatStk[OS_TASK_STAT_STK_SIZE]; /* Statistics task stack */
=1 #endif
35 =1
36 =1 static OS_TCB OSTCBTbl[OS_MAX_TASKS + OS_N_SYS_TASKS]; /* Table of TCBs */
37 =1
38 =1 /*$PAGE*/
39 =1 /*
40 =1 *********************************************************************************************************
41 =1 * MAPPING TABLE TO MAP BIT POSITION TO BIT MASK
42 =1 *
43 =1 * Note: Index into table is desired bit position, 0..7
44 =1 * Indexed value corresponds to bit mask
45 =1 *********************************************************************************************************
46 =1 */
47 =1
48 =1 INT8U const OSMapTbl[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};
49 =1
50 =1 /*
51 =1 *********************************************************************************************************
52 =1 * PRIORITY RESOLUTION TABLE
53 =1 *
54 =1 * Note: Index into table is bit pattern to resolve highest priority
55 =1 * Indexed value corresponds to highest priority bit position (i.e. 0..7)
56 =1 *********************************************************************************************************
57 =1 */
58 =1
59 =1 INT8U const OSUnMapTbl[] = {
60 =1 0, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
61 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
62 =1 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
63 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
64 =1 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
C51 COMPILER V8.02 UCOS_II 03/10/2008 11:50:50 PAGE 16
65 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
66 =1 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
67 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
68 =1 7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
69 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
70 =1 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
71 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
72 =1 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
73 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
74 =1 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
75 =1 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0
76 =1 };
77 =1
78 =1 /*$PAGE*/
79 =1 /*
80 =1 *********************************************************************************************************
81 =1 * MAKE TASK READY TO RUN BASED ON EVENT OCCURING
82 =1 *
83 =1 * Description: This function is called by other uC/OS-II services and is used to ready a task that was
84 =1 * waiting for an event to occur.
85 =1 *
86 =1 * Arguments : pevent is a pointer to the event control block corresponding to the event.
87 =1 *
88 =1 * msg is a pointer to a message. This pointer is used by message oriented services
89 =1 * such as MAILBOXEs and QUEUEs. The pointer is not used when called by other
90 =1 * service functions.
91 =1 *
92 =1 * msk is a mask that is used to clear the status byte of the TCB. For example,
93 =1 * OSSemPost() will pass OS_STAT_SEM, OSMboxPost() will pass OS_STAT_MBOX etc.
94 =1 *
95 =1 * Returns : none
96 =1 *
97 =1 * Note : This function is INTERNAL to uC/OS-II and your application should not call it.
98 =1 *********************************************************************************************************
99 =1 */
100 =1 #if (OS_Q_EN && (OS_MAX_QS >= 2)) || OS_MBOX_EN || OS_SEM_EN
=1 void OSEventTaskRdy (OS_EVENT *pevent, void *msg, INT8U msk) reentrant
=1 {
=1 OS_TCB *ptcb;
=1 INT8U x;
=1 INT8U y;
=1 INT8U bitx;
=1 INT8U bity;
=1 INT8U prio;
=1
=1
=1 y = OSUnMapTbl[pevent->OSEventGrp]; /* Find highest prio. task waiting for message */
=1 bity = OSMapTbl[y];
=1 x = OSUnMapTbl[pevent->OSEventTbl[y]];
=1 bitx = OSMapTbl[x];
=1 prio = (INT8U)((y << 3) + x); /* Find priority of task getting the msg */
=1 if ((pevent->OSEventTbl[y] &= ~bitx) == 0) { /* Remove this task from the waiting list */
=1 pevent->OSEventGrp &= ~bity;
=1 }
=1 ptcb = OSTCBPrioTbl[prio]; /* Point to this task's OS_TCB */
=1 ptcb->OSTCBDly = 0; /* Prevent OSTimeTick() from readying task */
=1 ptcb->OSTCBEventPtr = (OS_EVENT *)0; /* Unlink ECB from this task */
=1 #if (OS_Q_EN && (OS_MAX_QS >= 2)) || OS_MBOX_EN
=1 ptcb->OSTCBMsg = msg; /* Send message directly to waiting task */
=1 #else
=1 msg = msg; /* Prevent compiler warning if not used */
-
C51 COMPILER V8.02 UCOS_II 03/10/2008 11:50:50 PAGE 17
=1 #endif
=1 ptcb->OSTCBStat &= ~msk; /* Clear bit associated with event type */
=1 if (ptcb->OSTCBStat == OS_STAT_RDY) { /* See if task is ready (could be susp'd) */
=1 OSRdyGrp |= bity; /* Put task in the ready to run list */
=1 OSRdyTbl[y] |= bitx;
=1 }
=1 }
=1 #endif
134 =1 /*$PAGE*/
135 =1 /*
136 =1 *********************************************************************************************************
137 =1 * MAKE TASK WAIT FOR EVENT TO OCCUR
138 =1 *
139 =1 * Description: This function is called by other uC/OS-II services to suspend a task because an event has
140 =1 * not occurred.
141 =1 *
142 =1 * Arguments : pevent is a pointer to the event control block for which the task will be waiting for.
143 =1 *
144 =1 * Returns : none
145 =1 *
146 =1 * Note : This function is INTERNAL to uC/OS-II and your application should not call it.
147 =1 *********************************************************************************************************
148 =1 */
149 =1 #if (OS_Q_EN && (OS_MAX_QS >= 2)) || OS_MBOX_EN || OS_SEM_EN
=1 void OSEventTaskWait (OS_EVENT *pevent) reentrant
=1 {
=1 OSTCBCur->OSTCBEventPtr = pevent; /* Store pointer to event control block in TCB */
=1 if ((OSRdyTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) { /* Task no longer ready */
=1 OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
=1 }
=1 pevent->OSEventTbl[OSTCBCur->OSTCBY] |= OSTCBCur->OSTCBBitX; /* Put task in waiting list */
=1 pevent->OSEventGrp |= OSTCBCur->OSTCBBitY;
=1 }
=1 #endif
160 =1 /*$PAGE*/
161 =1 /*
162 =1 *********************************************************************************************************
163 =1 * MAKE TASK READY TO RUN BASED ON EVENT TIMEOUT
164 =1 *
165 =1 * Description: This function is called by other uC/OS-II services to make a task ready to run because a
166 =1 * timeout occurred.
167 =1 *
168 =1 * Arguments : pevent is a pointer to the event control block which is readying a task.
169 =1 *
170 =1 * Returns : none
171 =1 *
172 =1 * Note : This function is INTERNAL to uC/OS-II and your application should not call it.
173 =1 *********************************************************************************************************
174 =1 */
175 =1 #if (OS_Q_EN && (OS_MAX_QS >= 2)) || OS_MBOX_EN || OS_SEM_EN
=1 void OSEventTO (OS_EVENT *pevent) reentrant
=1 {
=1 if ((pevent->OSEventTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) {
=1 pevent->OSEventGrp &= ~OSTCBCur->OSTCBBitY;
=1 }
=1 OSTCBCur->OSTCBStat = OS_STAT_RDY; /* Set status to ready */
=1 OSTCBCur->OSTCBEventPtr = (OS_EVENT *)0; /* No longer waiting for event */
=1 }
=1 #endif
185 =1 /*$PAGE*/
186 =1 /*
187 =1 *********************************************************************************************************
C51 COMPILER V8.02 UCOS_II 03/10/2008 11:50:50 PAGE 18
188 =1 * INITIALIZE EVENT CONTROL BLOCK'S WAIT LIST
189 =1 *
190 =1 * Description: This function is called by other uC/OS-II services to initialize the event wait list.
191 =1 *
192 =1 * Arguments : pevent is a pointer to the event control block allocated to the event.
193 =1 *
194 =1 * Returns : none
195 =1 *
196 =1 * Note : This function is INTERNAL to uC/OS-II and your application should not call it.
197 =1 *********************************************************************************************************
198 =1 */
199 =1 #if (OS_Q_EN && (OS_MAX_QS >= 2)) || OS_MBOX_EN || OS_SEM_EN
=1 void OSEventWaitListInit (OS_EVENT *pevent) reentrant
=1 {
=1 INT8U i;
=1
=1
=1 pevent->OSEventGrp = 0x00; /* No task waiting on event */
=1 for (i = 0; i < OS_EVENT_TBL_SIZE; i++) {
=1 pevent->OSEventTbl[i] = 0x00;
=1 }
=1 }
=1 #endif
211 =1 /*$PAGE*/
212 =1 /*
213 =1 *********************************************************************************************************
214 =1 * INITIALIZATION
215 =1 *
216 =1 * Description: This function is used to initialize the internals of uC/OS-II and MUST be called prior to
217 =1 * creating any uC/OS-II object and, prior to calling OSStart().
218 =1 *
219 =1 * Arguments : none
220 =1 *
221 =1 * Returns : none
222 =1 *********************************************************************************************************
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