📄 os_cpu_c.lst
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C51 COMPILER V7.50 OS_CPU_C 01/25/2007 14:15:00 PAGE 1
C51 COMPILER V7.50, COMPILATION OF MODULE OS_CPU_C
OBJECT MODULE PLACED IN os_cpu_c.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE os_cpu_c.c LARGE BROWSE DEBUG OBJECTEXTEND
line level source
1 /*
2 /*******************************************************************************
3 uS/OS-II v2.8
4 文 件 名 : os_cpu_c.c
5 作 者 : czn
6 版 本 : v1.0
7 ********************************************************************************
8 */
9 #define OS_CPU_GLOBALS
10 #include "includes.h"
11
12 /*
13 *******************************************************************************
14 OSTaskStkInit()
15 功能描述: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the
16 stack frame of the task being created. This function is highly processor specific.
17 参 数: task is a pointer to the task code
18 p_arg is a pointer to a user supplied data area that will be passed to the task
19 when the task first executes.
20 ptos is a pointer to the top of stack. It is assumed that 'ptos' points to
21 a 'free' entry on the task stack. If OS_STK_GROWTH is set to 1 then
22 'ptos' will contain the HIGHEST valid address of the stack. Similarly, if
23 OS_STK_GROWTH is set to 0, the 'ptos' will contains the LOWEST valid address
24 of the stack.
25 opt specifies options that can be used to alter the behavior of OSTaskStkInit().
26 (see uCOS_II.H for OS_TASK_OPT_???).
27 说 明: Interrupts are enabled when your task starts executing.
28 *******************************************************************************
29 */
30 OS_STK *OSTaskStkInit(void (*task)(void *p_arg),void *p_arg, OS_STK *ptos, INT16U opt) reentrant
31 {
32 1 OS_STK *stk;
33 1
34 1 p_arg = p_arg;
35 1 opt = opt;
36 1 stk = (OS_STK *)ptos;
37 1 *stk++ = 15; /*用户堆栈长度 */
38 1 *stk++ = (INT16U)task & 0xFF; /*任务地址低8位 */
39 1 *stk++ = (INT16U)task >> 8; /*任务地址高8位 */
40 1 *stk++ = 0x00; /*PSW */
41 1 *stk++ = 0x0A; /*ACC */
42 1 *stk++ = 0x0B; /*B */
43 1 *stk++ = 0x00; /*DPL */
44 1 *stk++ = 0x00; /*DPH */
45 1 *stk++ = 0x00; /*R0 */
46 1
47 1 /*R3、R2、R1用于传递任务参数ppdata，其中R3代表存储器类型，R2为高字节偏移，R1为低字节位移。*/
48 1 /*通过分析KEIL汇编，了解到任务的void *ppdata参数恰好是用R3、R2、R1传递，不是通过虚拟堆栈。*/
49 1 *stk++ = (INT16U)p_arg & 0xFF; /*R1 */
50 1 *stk++ = (INT16U)p_arg >> 8; /*R2 */
51 1 *stk++ = 0x01; /*R3 XDATA，存储器类型为1 */
52 1
53 1 *stk++ = 0x04; /*R4 */
54 1 *stk++ = 0x05; /*R5 */
55 1 *stk++ = 0x06; /*R6 */
C51 COMPILER V7.50 OS_CPU_C 01/25/2007 14:15:00 PAGE 2
56 1 *stk++ = 0x07; /*R7 */
57 1 /*不用保存SP，任务切换时根据用户堆栈长度计算得出。*/
58 1 *stk++ = (INT16U) (ptos+MaxStkSize) >> 8; /*?C_XBP 仿真堆栈指针高8位 */
59 1 *stk++ = (INT16U) (ptos+MaxStkSize) & 0xFF; /*?C_XBP 仿真堆栈指针低8位 */
60 1
61 1 return ((void *)ptos);
62 1 }
63 /*
64 *******************************************************************************
65 OSTaskCreateHook()
66 功能描述: This function is called when a task is created.
67 参 数: ptcb is a pointer to the task control block of the task being created.
68 说 明: 1) Interrupts are disabled during this call.
69 *******************************************************************************
70 */
71 #if OS_CPU_HOOKS_EN > 0
72 void OSTaskCreateHook(OS_TCB *ptcb) reentrant
73 {
74 1 ptcb = ptcb; /* Prevent compiler warning */
75 1 }
76 #endif
77 /*
78 *******************************************************************************
79 OSTaskDelHook()
80 功能描述: This function is called when a task is deleted.
81 参 数: ptcb is a pointer to the task control block of the task being deleted.
82 说 明: 1) Interrupts are disabled during this call.
83 *******************************************************************************
84 */
85 #if OS_CPU_HOOKS_EN > 0
86 void OSTaskDelHook(OS_TCB *ptcb) reentrant
87 {
88 1 ptcb = ptcb; /* Prevent compiler warning */
89 1 }
90 #endif
91 /*
92 *******************************************************************************
93 OSTaskSwHook()
94 功能描述: This function is called when a task switch is performed. This allows you to perform other
95 operations during a context switch.
96 参 数: none
97 说 明: 1) Interrupts are disabled during this call.
98 2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that
99 will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the
100 task being switched out (i.e. the preempted task).
101 *******************************************************************************
102 */
103 #if OS_CPU_HOOKS_EN > 0
104 void OSTaskSwHook(void) reentrant
105 {
106 1 }
107 #endif
108 /*
109 *******************************************************************************
110 OSTaskIdleHook()
111 功能描述: This function is called by the idle task. This hook has been added to allow you to do
112 such things as STOP the CPU to conserve power.
113 参 数: none
114 说 明: 1) Interrupts are enabled during this call.
115 *******************************************************************************
116 */
117 #if OS_CPU_HOOKS_EN > 0 && OS_VERSION >= 251
C51 COMPILER V7.50 OS_CPU_C 01/25/2007 14:15:00 PAGE 3
118 void OSTaskIdleHook (void)reentrant
119 {
120 1 }
121 #endif
122 /*
123 *******************************************************************************
124 OSTaskStatHook()
125 功能描述: This function is called every second by uC/OS-II's statistics task. This allows your
126 application to add functionality to the statistics task.
127 参 数: none
128 说 明:
129 *******************************************************************************
130 */
131 #if OS_CPU_HOOKS_EN > 0
132 void OSTaskStatHook(void) reentrant
133 {
134 1 }
135 #endif
136 /*
137 *******************************************************************************
138 OSTimeTickHook()
139 功能描述: This function is called every tick.
140 参 数: none
141 说 明: 1) Interrupts may or may not be ENABLED during this call.
142 *******************************************************************************
143 */
144 #if OS_CPU_HOOKS_EN > 0
145 void OSTimeTickHook (void) reentrant
146 {
147 1 }
148 #endif
149 /*
150 *******************************************************************************
151 OSInitHookBegin()
152 功能描述: This function is called by OSInit() at the beginning of OSInit().
153 参 数: none
154 说 明: 1) Interrupts should be disabled during this call.
155 *******************************************************************************
156 */
157 #if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
158 void OSInitHookBegin (void) reentrant
159 {
160 1 }
161 #endif
162 /*
163 *******************************************************************************
164 OSInitHookEnd()
165 功能描述: This function is called by OSInit() at the beginning of OSInit().
166 参 数: none
167 说 明: 1) Interrupts should be disabled during this call.
168 *******************************************************************************
169 */
170 #if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
171 void OSInitHookEnd (void) reentrant
172 {
173 1 }
174 #endif
175 /*
176 *******************************************************************************
177 OSTCBInitHook()
178 功能描述: This function is called by OS_TCBInit() after setting up most of the TCB.
179 参 数: ptcb is a pointer to the TCB of the task being created.
C51 COMPILER V7.50 OS_CPU_C 01/25/2007 14:15:00 PAGE 4
180 说 明: 1) Interrupts may or may not be ENABLED during this call.
181 *******************************************************************************
182 */
183 #if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
184 void OSTCBInitHook (OS_TCB *ptcb) reentrant
185 {
186 1 ptcb = ptcb; /* Prevent Compiler warning */
187 1 }
188 #endif
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 758 ----
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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