MS2 程序分析
Lldwsw
一：下载MS2.RAR 压缩包解压缩后可以看到如下界面：
第一项为MS2 软件包
源代码在线查看： message.lst
C51 COMPILER V7.10 MESSAGE 03/04/2008 11:51:09 PAGE 1
C51 COMPILER V7.10, COMPILATION OF MODULE MESSAGE
OBJECT MODULE PLACED IN .\message.obj
COMPILER INVOKED BY: C:\Program Files\Keil\C51\BIN\C51.EXE ..\SourceFile\message.c BROWSE DEBUG OBJECTEXTEND PRINT(.\mes
-sage.lst) OBJECT(.\message.obj)
line level source
1
2 /***************************************************************************************
3 ****************************************************************************************
4 * FILE : message.c
5 * Description : FIFO message queue
6 *
7 * Copyright (c) 2003~2007 by WANG SHAOWEI. All Rights Reserved.
8 *
9 * History:
10 * Version Name Date Description
11 1.0 Wang Shaowei 2003/07/16 Initial Version (MCU System)
12 2.0 Wang Shaowei 2005/06/01 MS2
13 3.0 Wang Shaowei 2007/03/11 MS3
14
15 ****************************************************************************************
16 ****************************************************************************************/
17
18
19 #include "common.h"
20
21
22
23
24
25 static U8 data u8MsgHead; /*position that msg will be put in*/
26 static U8 data u8MsgTail; /*position that msg will be get out*/
27 static U8 data u8MsgNum; /*msg number*/
28 static U16 data u16MsgArray[MSG_ARRAY_SIZE]; /*msg queue*/
29
30
31 /*==================================================================
32 * Function : msg_init
33 * Description : init message
34 * Input Para : void
35 * Output Para : void
36 * Return Value: void
37 ==================================================================*/
38 void msg_init(void)
39 {
40 1 u8MsgHead = 0;
41 1 u8MsgTail = 0;
42 1 u8MsgNum = 0;
43 1 }
44
45
46 /*==================================================================
47 * Function : msg_put_in
48 * Description : Put in a U16 data in msg queue.
49 Because there is no return value to indicate success or fail,
50 make sure msg queue is large enough, that is MSG_ARRAY_SIZE is big enough!!!
51 You can get a suitable MSG_ARRAY_SIZE with the debug message.
52 * Input Para : U16 u16Val : data to be put in
53 * Output Para : void
54 * Return Value: void
C51 COMPILER V7.10 MESSAGE 03/04/2008 11:51:09 PAGE 2
55 ==================================================================*/
56 void msg_put_in(U16 u16)
57 {
58 1 U1 EA_MAP;
59 1
60 1 if (u8MsgNum >= MSG_ARRAY_SIZE)
61 1 {
62 2 //ERRprintf("msg_put_in: msg queue already full\n");
63 2 return;
64 2 }
65 1
66 1 EA_MAP = INTERRUPT_GET();
67 1 INTERRUPT_DISABLE();
68 1
69 1 //first put in data, then increase u8MsgHead
70 1 u16MsgArray[ u8MsgHead] = u16;
71 1 u8MsgHead++;
72 1 if (u8MsgHead >= MSG_ARRAY_SIZE)
73 1 {
74 2 u8MsgHead = 0;
75 2 }
76 1 u8MsgNum++;
77 1
78 1 INTERRUPT_SET(EA_MAP);
79 1 return;
80 1 }
81
82
83 /*==================================================================
84 * Function : msg_get_out
85 * Description : get a U16 data out of the msg queue.
86 If the msg queue is empty, get MSG_NULL
87 * Input Para : void
88 * Output Para : U16 * pu16Val : pointer to hold data
89 * Return Value: void
90 ==================================================================*/
91 void msg_get_out(U16 *pU16)
92 {
93 1 U1 EA_MAP;
94 1
95 1 if (u8MsgNum == 0)
96 1 {
97 2 * pU16 = 0x0000;//MSG_NULL 98 2 return;
99 2 }
100 1
101 1 EA_MAP = INTERRUPT_GET();
102 1 INTERRUPT_DISABLE();
103 1
104 1 //first get out data, then increase u8MsgTail
105 1 *pU16 = u16MsgArray[u8MsgTail];
106 1 u8MsgTail++;
107 1 if (u8MsgTail >= MSG_ARRAY_SIZE)
108 1 {
109 2 u8MsgTail = 0;
110 2 }
111 1 u8MsgNum--;
112 1
113 1 INTERRUPT_SET(EA_MAP);
114 1 return;
115 1 }
116
C51 COMPILER V7.10 MESSAGE 03/04/2008 11:51:09 PAGE 3
117 void msg_send_msg(U8 MsgType, U8 Val)
118 {
119 1 U1 EA_MAP;
120 1
121 1 if (u8MsgNum >= MSG_ARRAY_SIZE)
122 1 {
123 2 //ERRprintf("msg_put_in: msg queue already full\n");
124 2 return;
125 2 }
126 1
127 1 EA_MAP = INTERRUPT_GET();
128 1 INTERRUPT_DISABLE();
129 1
130 1 //first put in data, then increase u8MsgHead
131 1 ((U8 *)(&(u16MsgArray[ u8MsgHead])))[0] = MsgType;
132 1 ((U8 *)(&(u16MsgArray[ u8MsgHead])))[1] = Val;
133 1
134 1 u8MsgHead++;
135 1 if (u8MsgHead >= MSG_ARRAY_SIZE)
136 1 {
137 2 u8MsgHead = 0;
138 2 }
139 1 u8MsgNum++;
140 1
141 1 INTERRUPT_SET(EA_MAP);
142 1 return;
143 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 153 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 11 ----
IDATA SIZE = ---- ----
BIT SIZE = ---- 3
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
