📄 os_cpu_c.lst
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C51 COMPILER V6.20c OS_CPU_C 07/03/2002 08:51:26 PAGE 1
C51 COMPILER V6.20c, COMPILATION OF MODULE OS_CPU_C
OBJECT MODULE PLACED IN ..\port\OS_CPU_C.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ..\port\OS_CPU_C.C LARGE ROM(COMPACT) OPTIMIZE(9,SIZE) REGFILE(..\out\EXEc5
-1.ORC) BROWSE INCDIR(.) DEBUG OBJECTEXTEND PRINT(..\out\OS_CPU_C.lst) SRC(..\out\OS_CPU_C.SRC)
stmt level source
1 /*
2 *********************************************************************************************************
3 * uC/OS-II
4 * The Real-Time Kernel
5 *
6 * (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
7 * All Rights Reserved
8 *
9 *
10 * 80x86/80x88 Specific code
11 * LARGE MEMORY MODEL
12 *
13 * File : OS_CPU_C.C
14 * By : Jean J. Labrosse
15 *
16 *
17 * Ported date: MAY 29, 2002
18 * By: Junmin Zheng, China, (zhengjunm@263.net)
19 * Target platform: Keil C51 V6.20
20 *
21 *********************************************************************************************************
22 */
23
24 #define OS_CPU_GLOBALS
25 #include "..\mainfile\includes.h"
26 #include "..\function\os_kcdef.h"
27 /*
28 *********************************************************************************************************
29 * INITIALIZE A TASK'S STACK
30 *
31 * Description: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the
32 * stack frame of the task being created. This function is highly processor specific.
33 *
34 * Arguments : task is a pointer to the task code
35 *
36 * pdata is a pointer to a user supplied data area that will be passed to the task
37 * when the task first executes.
38 *
39 * ptos is a pointer to the top of stack. It is assumed that 'ptos' points to
40 * a 'free' entry on the task stack. If OS_STK_GROWTH is set to 1 then
41 * 'ptos' will contain the HIGHEST valid address of the stack. Similarly, if
42 * OS_STK_GROWTH is set to 0, the 'ptos' will contains the LOWEST valid address
43 * of the stack.
44 *
45 * opt specifies options that can be used to alter the behavior of OSTaskStkInit().
46 * (see uCOS_II.H for OS_TASK_OPT_???).
47 *
48 * Returns : Always returns the location of the new top-of-stack' once the processor registers have
49 * been placed on the stack in the proper order.
50 *
51 * Note(s) : Interrupts are enabled when your task starts executing. You can change this by setting the
52 * PSW to 0x0002 instead. In this case, interrupts would be disabled upon task startup. The
53 * application code would be responsible for enabling interrupts at the beginning of the task
54 * code. You will need to modify OSTaskIdle() and OSTaskStat() so that they enable
C51 COMPILER V6.20c OS_CPU_C 07/03/2002 08:51:26 PAGE 2
55 * interrupts. Failure to do this will make your system crash!
56 *********************************************************************************************************
57 */
58
59 /* The stack variable points to the start pointer in hardware stack and is defined in OS_CPU_A */
60 extern idata unsigned char Stack[1];
61
62 OS_STK *OSTaskStkInit (void (*task)(void *pd) KCREENTRANT, void * vd, OS_STK *ptos, INT16U opt) KCREENTRAN
-T
63 {
64 1 INT8U * stk;
65 1 opt = opt; /* 'opt' is not used, prevent warning */
66 1 stk = (INT8U *) ptos; /* Load stack pointer */
67 1
68 1 stk -= sizeof(INT16U); /* The value should be loaded to PC */
69 1 *(INT16U*)stk = (INT16U) task; /* next time when this task is running */
70 1
71 1 stk -= sizeof(INT16U); /* The value should be loaded to PC */
72 1 *(INT16U*)stk = (INT16U) task; /* next time when this task is running */
73 1
74 1 /* Following is the registers pushed into hardware stack */
75 1 *--stk = 'A'; /* ACC */
76 1 *--stk = 'B'; /* B */
77 1 *--stk = 'L'; /* DPL */
78 1 *--stk = 'H'; /* DPH */
79 1 *--stk = PSW; /* PSW */
80 1 *--stk = 0; /* R0 */
81 1
82 1 stk -= sizeof(void *); /* Keil C uses R1,R2,R3 to pass the */
83 1 *(void**)stk = vd; /* arguments of functions. */
84 1
85 1 *--stk = 4; /* R4 */
86 1 *--stk = 5; /* R5 */
87 1 *--stk = 6; /* R6 */
88 1 *--stk = 7; /* R7 */
89 1
90 1 *--stk = 0x80; /* IE, EA is enabled */
91 1 /*
92 1 Next is calculating the hardware stack pointer.
93 1 */
94 1 *--stk = (INT8U) Stack-1 /* Initial value when main was called */
95 1 +1 /* IE */
96 1 +8 /* R0-R7, eight registers was saved */
97 1 +5 /* PSW, ACC, B, DPH, DPL, five registers */
98 1 +sizeof(INT16U) /* The PC value to be loaded */
99 1 +sizeof(INT16U) /* The PC value to be loaded */
100 1 ;
101 1
102 1 return ((void *)stk);
103 1 }
104
105
106
107 void UserTickTimer(void) KCREENTRANT;
108
109 /* OSTickISR can be writen in c language now, so it is more easy for user to write code for their own */
110 void OSTickISR(void) KCREENTRANT interrupt 1
111 {
112 1
113 1 #pragma ASM
114 1 PUSH IE
115 1 #pragma ENDASM
C51 COMPILER V6.20c OS_CPU_C 07/03/2002 08:51:26 PAGE 3
116 1 OSIntEnter();
117 1 UserTickTimer();
118 1 OSTimeTick();
119 1 OSIntExit();
120 1 #pragma ASM
121 1 POP IE
122 1 #pragma ENDASM
123 1 }
124
125 /* If you want to write ISRs for your own, just do as OSTickISR() */
126
127 /*$PAGE*/
128 #if OS_CPU_HOOKS_EN
129
130
131 /*
132 *********************************************************************************************************
133 * TASK CREATION HOOK
134 *
135 * Description: This function is called when a task is created.
136 *
137 * Arguments : ptcb is a pointer to the task control block of the task being created.
138 *
139 * Note(s) : 1) Interrupts are disabled during this call.
140 *********************************************************************************************************
141 */
142 void OSTaskCreateHook (OS_TCB *ptcb) KCREENTRANT
143 {
144 1 ptcb = ptcb; /* Prevent compiler warning */
145 1 }
146
147
148 /*
149 *********************************************************************************************************
150 * TASK DELETION HOOK
151 *
152 * Description: This function is called when a task is deleted.
153 *
154 * Arguments : ptcb is a pointer to the task control block of the task being deleted.
155 *
156 * Note(s) : 1) Interrupts are disabled during this call.
157 *********************************************************************************************************
158 */
159 void OSTaskDelHook (OS_TCB *ptcb) KCREENTRANT
160 {
161 1 ptcb = ptcb; /* Prevent compiler warning */
162 1 }
163
164 /*
165 *********************************************************************************************************
166 * TASK SWITCH HOOK
167 *
168 * Description: This function is called when a task switch is performed. This allows you to perform other
169 * operations during a context switch.
170 *
171 * Arguments : none
172 *
173 * Note(s) : 1) Interrupts are disabled during this call.
174 * 2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that
175 * will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the
176 * task being switched out (i.e. the preempted task).
177 *********************************************************************************************************
C51 COMPILER V6.20c OS_CPU_C 07/03/2002 08:51:26 PAGE 4
178 */
179 void OSTaskSwHook (void) KCREENTRANT
180 {
181 1 }
182
183 /*
184 *********************************************************************************************************
185 * STATISTIC TASK HOOK
186 *
187 * Description: This function is called every second by uC/OS-II's statistics task. This allows your
188 * application to add functionality to the statistics task.
189 *
190 * Arguments : none
191 *********************************************************************************************************
192 */
193 void OSTaskStatHook (void) KCREENTRANT
194 {
195 1 }
196
197 /*
198 *********************************************************************************************************
199 * TICK HOOK
200 *
201 * Description: This function is called every tick.
202 *
203 * Arguments : none
204 *
205 * Note(s) : 1) Interrupts may or may not be ENABLED during this call.
206 *********************************************************************************************************
207 */
208 void OSTimeTickHook (void) KCREENTRANT
209 {
210 1 }
211
212 #endif
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 366 ----
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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