📄 os_task.src
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; .\OS_TASK.SRC generated from: SOURCE\OS_TASK.C
; COMPILER INVOKED BY:
; D:\tools\Keil\C51\BIN\C51.EXE SOURCE\OS_TASK.C LARGE OPTIMIZE(SIZE) REGFILE(.\OS_AT89C55WD.ORC) BROWSE NOINTPROMOTE INCDIR(D:\MY\empolder\uCOS-II\MCS-51\AT89C55WD\Keil 7_5\) DEBUG OBJECTEXTEND NOPRINT SRC(.\OS_TASK.SRC)
$NOMOD51
NAME OS_TASK
P0 DATA 080H
P1 DATA 090H
P2 DATA 0A0H
P3 DATA 0B0H
AC BIT 0D0H.6
T0 BIT 0B0H.4
T2_EX BIT 090H.1
T1 BIT 0B0H.5
EA BIT 0A8H.7
T2 BIT 090H.0
IE DATA 0A8H
P0_0 BIT 080H.0
P1_0 BIT 090H.0
P0_1 BIT 080H.1
P2_0 BIT 0A0H.0
P1_1 BIT 090H.1
P0_2 BIT 080H.2
P2_1 BIT 0A0H.1
P1_2 BIT 090H.2
P0_3 BIT 080H.3
P2_2 BIT 0A0H.2
P1_3 BIT 090H.3
P0_4 BIT 080H.4
P2_3 BIT 0A0H.3
P1_4 BIT 090H.4
P0_5 BIT 080H.5
EXF2 BIT 0C8H.6
RD BIT 0B0H.7
P2_4 BIT 0A0H.4
P1_5 BIT 090H.5
P0_6 BIT 080H.6
P2_5 BIT 0A0H.5
P1_6 BIT 090H.6
P0_7 BIT 080H.7
ES BIT 0A8H.4
P2_6 BIT 0A0H.6
P1_7 BIT 090H.7
P2_7 BIT 0A0H.7
IP DATA 0B8H
RI BIT 098H.0
CY BIT 0D0H.7
INT0 BIT 0B0H.2
TI BIT 098H.1
INT1 BIT 0B0H.3
RCAP2H DATA 0CBH
PS BIT 0B8H.4
SP DATA 081H
OV BIT 0D0H.2
RCAP2L DATA 0CAH
C_T2 BIT 0C8H.1
WR BIT 0B0H.6
RCLK BIT 0C8H.5
TCLK BIT 0C8H.4
PCON DATA 087H
SBUF DATA 099H
SCON DATA 098H
TMOD DATA 089H
TCON DATA 088H
IE0 BIT 088H.1
IE1 BIT 088H.3
B DATA 0F0H
CP_RL2 BIT 0C8H.0
ACC DATA 0E0H
ET0 BIT 0A8H.1
TF0 BIT 088H.5
ET1 BIT 0A8H.3
TF1 BIT 088H.7
ET2 BIT 0A8H.5
TF2 BIT 0C8H.7
RB8 BIT 098H.2
TH0 DATA 08CH
IT0 BIT 088H.0
EX0 BIT 0A8H.0
TH1 DATA 08DH
IT1 BIT 088H.2
EX1 BIT 0A8H.2
TB8 BIT 098H.3
TH2 DATA 0CDH
P BIT 0D0H.0
SM0 BIT 098H.7
TL0 DATA 08AH
SM1 BIT 098H.6
TL1 DATA 08BH
SM2 BIT 098H.5
TL2 DATA 0CCH
PT0 BIT 0B8H.1
PT1 BIT 0B8H.3
RS0 BIT 0D0H.3
TR0 BIT 088H.4
PT2 BIT 0B8H.5
RS1 BIT 0D0H.4
TR1 BIT 088H.6
TR2 BIT 0C8H.2
PX0 BIT 0B8H.0
PX1 BIT 0B8H.2
DPH DATA 083H
DPL DATA 082H
EXEN2 BIT 0C8H.3
REN BIT 098H.4
T2MOD DATA 0C9H
T2CON DATA 0C8H
DPS DATA 0A2H
RXD BIT 0B0H.0
TXD BIT 0B0H.1
F0 BIT 0D0H.5
F1 BIT 0D0H.1
PSW DATA 0D0H
?PR?_?OSTaskCreate?OS_TASK SEGMENT CODE
EXTRN BIT (OSRunning)
EXTRN CODE (_?OS_Sched)
EXTRN CODE (_?OS_TCBInit)
EXTRN CODE (_?OSTaskStkInit)
EXTRN XDATA (OSTCBPrioTbl)
EXTRN XDATA (OSTaskCtr)
EXTRN CODE (?C?ADDXBP)
EXTRN CODE (?C?PSTXDATA)
EXTRN CODE (?C?XBPOFF)
EXTRN CODE (?C?PLDXDATA)
EXTRN DATA (?C_XBP)
EXTRN CODE (?C?LSTKXDATA)
PUBLIC _?OSTaskCreate
; /*
; *********************************************************************************************************
; * uC/OS-II
; * The Real-Time Kernel
; * TASK MANAGEMENT
; *
; * (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
; * All Rights Reserved
; *
; * File : OS_TASK.C
; * By : Jean J. Labrosse
; *********************************************************************************************************
; */
;
; #ifndef OS_MASTER_FILE
; #include "includes.h"
; #endif
;
; /*
; *********************************************************************************************************
; * CHANGE PRIORITY OF A TASK
; *
; * Description: This function allows you to change the priority of a task dynamically. Note that the new
; * priority MUST be available.
; *
; * Arguments : oldp is the old priority
; *
; * newp is the new priority
; *
; * Returns : OS_NO_ERR is the call was successful
; * OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
; * (i.e. >= OS_LOWEST_PRIO)
; * OS_PRIO_EXIST if the new priority already exist.
; * OS_PRIO_ERR there is no task with the specified OLD priority (i.e. the OLD task does
; * not exist.
; *********************************************************************************************************
; */
;
; #if OS_TASK_CHANGE_PRIO_EN > 0
; INT8U OSTaskChangePrio (INT8U oldprio, INT8U newprio)TASK_REENTRANT
; {
; #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
; OS_CPU_SR cpu_sr;
; #endif
;
; #if OS_EVENT_EN > 0
; OS_EVENT *pevent;
; #endif
;
; OS_TCB *ptcb;
; INT8U x;
; INT8U y;
; INT8U bitx;
; INT8U bity;
;
;
;
; #if OS_ARG_CHK_EN > 0
; if ((oldprio >= OS_LOWEST_PRIO && oldprio != OS_PRIO_SELF) ||
; newprio >= OS_LOWEST_PRIO) {
; return (OS_PRIO_INVALID);
; }
; #endif
; OS_ENTER_CRITICAL();
; if (OSTCBPrioTbl[newprio] != (OS_TCB *)0) { /* New priority must not already exist */
; OS_EXIT_CRITICAL();
; return (OS_PRIO_EXIST);
; } else {
; OSTCBPrioTbl[newprio] = (OS_TCB *)1; /* Reserve the entry to prevent others */
; OS_EXIT_CRITICAL();
; y = newprio >> 3; /* Precompute to reduce INT. latency */
; bity = OSMapTbl[y];
; x = newprio & 0x07;
; bitx = OSMapTbl[x];
; OS_ENTER_CRITICAL();
; if (oldprio == OS_PRIO_SELF) { /* See if changing self */
; oldprio = OSTCBCur->OSTCBPrio; /* Yes, get priority */
; }
; ptcb = OSTCBPrioTbl[oldprio];
; if (ptcb != (OS_TCB *)0) { /* Task to change must exist */
; OSTCBPrioTbl[oldprio] = (OS_TCB *)0; /* Remove TCB from old priority */
; if ((OSRdyTbl[ptcb->OSTCBY] & ptcb->OSTCBBitX) != 0x00) { /* If task is ready make it not */
; if ((OSRdyTbl[ptcb->OSTCBY] &= ~ptcb->OSTCBBitX) == 0x00) {
; OSRdyGrp &= ~ptcb->OSTCBBitY;
; }
; OSRdyGrp |= bity; /* Make new priority ready to run */
; OSRdyTbl[y] |= bitx;
; #if OS_EVENT_EN > 0
; } else {
; pevent = ptcb->OSTCBEventPtr;
; if (pevent != (OS_EVENT *)0) { /* Remove from event wait list */
; if ((pevent->OSEventTbl[ptcb->OSTCBY] &= ~ptcb->OSTCBBitX) == 0) {
; pevent->OSEventGrp &= ~ptcb->OSTCBBitY;
; }
; pevent->OSEventGrp |= bity; /* Add new priority to wait list */
; pevent->OSEventTbl[y] |= bitx;
; }
; #endif
; }
; OSTCBPrioTbl[newprio] = ptcb; /* Place pointer to TCB @ new priority */
; ptcb->OSTCBPrio = newprio; /* Set new task priority */
; ptcb->OSTCBY = y;
; ptcb->OSTCBX = x;
; ptcb->OSTCBBitY = bity;
; ptcb->OSTCBBitX = bitx;
; OS_EXIT_CRITICAL();
; OS_Sched(); /* Run highest priority task ready */
; return (OS_NO_ERR);
; } else {
; OSTCBPrioTbl[newprio] = (OS_TCB *)0; /* Release the reserved prio. */
; OS_EXIT_CRITICAL();
; return (OS_PRIO_ERR); /* Task to change didn't exist */
; }
; }
; }
; #endif
; /*$PAGE*/
; /*
; *********************************************************************************************************
; * CREATE A TASK
; *
; * Description: This function is used to have uC/OS-II manage the execution of a task. Tasks can either
; * be created prior to the start of multitasking or by a running task. A task cannot be
; * created by an ISR.
; *
; * Arguments : task is a pointer to the task's code
; *
; * pdata is a pointer to an optional data area which can be used to pass parameters to
; * the task when the task first executes. Where the task is concerned it thinks
; * it was invoked and passed the argument 'pdata' as follows:
; *
; * void Task (void *pdata)
; * {
; * for (;;) {
; * Task code;
; * }
; * }
; *
; * ptos is a pointer to the task's top of stack. If the configuration constant
; * OS_STK_GROWTH is set to 1, the stack is assumed to grow downward (i.e. from high
; * memory to low memory). 'pstk' will thus point to the highest (valid) memory
; * location of the stack. If OS_STK_GROWTH is set to 0, 'pstk' will point to the
; * lowest memory location of the stack and the stack will grow with increasing
; * memory locations.
; *
; * prio is the task's priority. A unique priority MUST be assigned to each task and the
; * lower the number, the higher the priority.
; *
; * Returns : OS_NO_ERR if the function was successful.
; * OS_PRIO_EXIT if the task priority already exist
; * (each task MUST have a unique priority).
; * OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
; * (i.e. >= OS_LOWEST_PRIO)
; *********************************************************************************************************
; */
;
; #if OS_TASK_CREATE_EN > 0
; INT8U OSTaskCreate (void (*task)(void *pd)TASK_REENTRANT, void *os_pdata, OS_STK *ptos, INT8U prio)TASK_REENTRANT
RSEG ?PR?_?OSTaskCreate?OS_TASK
_?OSTaskCreate:
USING 0
; SOURCE LINE # 158
MOV DPTR,#0FFFDH
LCALL ?C?ADDXBP
LCALL ?C?PSTXDATA
MOV DPTR,#0FFFCH
LCALL ?C?ADDXBP
; {
; #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
; OS_CPU_SR cpu_sr;
; #endif
; OS_STK *psp;
; INT8U err;
;
;
; #if OS_ARG_CHK_EN > 0
; if (prio > OS_LOWEST_PRIO) { /* Make sure priority is within allowable range */
; SOURCE LINE # 168
MOV DPTR,#0DH
LCALL ?C?XBPOFF
MOVX A,@DPTR
MOV R6,A
SETB C
SUBB A,#09H
JC ?C0001
; return (OS_PRIO_INVALID);
; SOURCE LINE # 169
MOV R7,#02AH
LJMP ?C0002
; }
; SOURCE LINE # 170
?C0001:
; #endif
; OS_ENTER_CRITICAL();
; SOURCE LINE # 172
CLR EA
; if (OSTCBPrioTbl[prio] == (OS_TCB *)0) { /* Make sure task doesn't already exist at this priority */
; SOURCE LINE # 173
MOV A,R6
MOV B,#03H
MUL AB
ADD A,#LOW (OSTCBPrioTbl)
MOV DPL,A
CLR A
ADDC A,#HIGH (OSTCBPrioTbl)
MOV DPH,A
LCALL ?C?PLDXDATA
MOV A,R1
ORL A,R2
ORL A,R3
JZ $ + 5H
LJMP ?C0003
; OSTCBPrioTbl[prio] = (OS_TCB *)1; /* Reserve the priority to prevent others from doing ... */
; SOURCE LINE # 174
MOV R3,A
MOV R2,A
MOV R1,#01H
MOV DPTR,#0DH
LCALL ?C?XBPOFF
MOVX A,@DPTR
MOV B,#03H
MUL AB
ADD A,#LOW (OSTCBPrioTbl)
MOV DPL,A
CLR A
ADDC A,#HIGH (OSTCBPrioTbl)
MOV DPH,A
LCALL ?C?PSTXDATA
; /* ... the same thing until task is created. */
; OS_EXIT_CRITICAL();
; SOURCE LINE # 176
SETB EA
; psp = (OS_STK *)OSTaskStkInit(task, os_pdata, ptos, 0); /* Initialize the task's stack */
; SOURCE LINE # 177
MOV DPTR,#0FFFEH
LCALL ?C?ADDXBP
CLR A
MOVX @DPTR,A
INC DPTR
MOVX @DPTR,A
MOV DPTR,#0CH
LCALL ?C?XBPOFF
LCALL ?C?PLDXDATA
MOV DPTR,#0FFFDH
LCALL ?C?ADDXBP
LCALL ?C?PSTXDATA
MOV DPTR,#0CH
LCALL ?C?XBPOFF
LCALL ?C?PLDXDATA
MOV DPTR,#0FFFDH
LCALL ?C?ADDXBP
LCALL ?C?PSTXDATA
MOV DPTR,#0CH
LCALL ?C?XBPOFF
LCALL ?C?PLDXDATA
LCALL _?OSTaskStkInit
MOV DPH,?C_XBP
MOV DPL,?C_XBP+01H
LCALL ?C?PSTXDATA
; err = OS_TCBInit(prio, psp, (OS_STK *)0, 0, 0, (void *)0, 0);
; SOURCE LINE # 178
MOV DPTR,#0FFFEH
LCALL ?C?ADDXBP
CLR A
MOVX @DPTR,A
INC DPTR
MOVX @DPTR,A
MOV R3,A
MOV R2,A
MOV R1,A
MOV DPTR,#0FFFDH
LCALL ?C?ADDXBP
LCALL ?C?PSTXDATA
MOV DPTR,#0FFFCH
LCALL ?C?ADDXBP
LCALL ?C?LSTKXDATA
DB 00H
DB 00H
DB 00H
DB 00H
MOV DPTR,#0FFFEH
LCALL ?C?ADDXBP
CLR A
MOVX @DPTR,A
INC DPTR
MOVX @DPTR,A
MOV R3,A
MOV R2,A
MOV R1,A
MOV DPTR,#0FFFDH
LCALL ?C?ADDXBP
LCALL ?C?PSTXDATA
MOV DPTR,#0EH
LCALL ?C?XBPOFF
LCALL ?C?PLDXDATA
MOV DPTR,#01BH
LCALL ?C?XBPOFF
MOVX A,@DPTR
MOV R7,A
LCALL _?OS_TCBInit
MOV DPTR,#03H
LCALL ?C?XBPOFF
MOV A,R7
MOVX @DPTR,A
; if (err == OS_NO_ERR) {
; SOURCE LINE # 179
MOV DPTR,#03H
LCALL ?C?XBPOFF
MOVX A,@DPTR
JNZ ?C0004
; OS_ENTER_CRITICAL();
; SOURCE LINE # 180
CLR EA
; OSTaskCtr++; /* Increment the #tasks counter */
; SOURCE LINE # 181
MOV DPTR,#OSTaskCtr
MOVX A,@DPTR
INC A
MOVX @DPTR,A
; OS_EXIT_CRITICAL();
; SOURCE LINE # 182
SETB EA
; if (OSRunning == TRUE) { /* Find highest priority task if multitasking has started */
; SOURCE LINE # 183
JNB OSRunning,?C0006
; OS_Sched();
; SOURCE LINE # 184
LCALL _?OS_Sched
; }
; SOURCE LINE # 185
; } else {
; SOURCE LINE # 186
SJMP ?C0006
?C0004:
; OS_ENTER_CRITICAL();
; SOURCE LINE # 187
CLR EA
; OSTCBPrioTbl[prio] = (OS_TCB *)0;/* Make this priority available to others */
; SOURCE LINE # 188
MOV R3,#00H
MOV R2,#00H
MOV R1,#00H
MOV DPTR,#0DH
LCALL ?C?XBPOFF
MOVX A,@DPTR
MOV B,#03H
MUL AB
ADD A,#LOW (OSTCBPrioTbl)
MOV DPL,A
CLR A
ADDC A,#HIGH (OSTCBPrioTbl)
MOV DPH,A
LCALL ?C?PSTXDATA
; OS_EXIT_CRITICAL();
; SOURCE LINE # 189
SETB EA
; }
; SOURCE LINE # 190
?C0006:
; return (err);
; SOURCE LINE # 191
MOV DPTR,#03H
LCALL ?C?XBPOFF
MOVX A,@DPTR
MOV R7,A
SJMP ?C0002
; }
; SOURCE LINE # 192
?C0003:
; OS_EXIT_CRITICAL();
; SOURCE LINE # 193
SETB EA
; return (OS_PRIO_EXIST);
; SOURCE LINE # 194
MOV R7,#028H
; }
; SOURCE LINE # 195
?C0002:
MOV DPTR,#0EH
LJMP ?C?ADDXBP
; END OF _?OSTaskCreate
END
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