📄 modbus.lst
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C51 COMPILER V8.05a MODBUS 08/19/2008 15:20:43 PAGE 1
C51 COMPILER V8.05a, COMPILATION OF MODULE MODBUS
OBJECT MODULE PLACED IN modbus.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE modbus.c BROWSE DEBUG OBJECTEXTEND
line level source
1 #include "main.h"
2
3 //字地址 0 - 255 (只取低8位)
4 //位地址 0 - 255 (只取低8位)
5
6 /* CRC 高位字节值表 */
7 const uint8 code auchCRCHi[] = {
8 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
9 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
10 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
11 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
12 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
13 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
14 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
15 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
16 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
17 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
18 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
19 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
20 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
21 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
22 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
23 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
24 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
25 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
26 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
27 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
28 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
29 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
30 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
31 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
32 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
33 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
34 } ;
35 /* CRC低位字节值表*/
36 const uint8 code auchCRCLo[] = {
37 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
38 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
39 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
40 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
41 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
42 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
43 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
44 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
45 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
46 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
47 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
48 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
49 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
50 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
51 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
52 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
53 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
54 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
55 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
C51 COMPILER V8.05a MODBUS 08/19/2008 15:20:43 PAGE 2
56 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
57 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
58 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
59 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
60 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
61 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
62 0x43, 0x83, 0x41, 0x81, 0x80, 0x40
63 } ;
64
65 uint8 localAddr = 1; //单片机控制板的地址
66 uint8 sendCount; //发送字节个数
67 uint8 receCount; //接收到的字节个数
68 uint8 sendPosi; //发送位置
69
70 uint16 crc16(uint8 *puchMsg, uint16 usDataLen)
71 {
72 1 uint8 uchCRCHi = 0xFF ; /* 高CRC字节初始化 */
73 1 uint8 uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */
74 1 uint32 uIndex ; /* CRC循环中的索引 */
75 1 while (usDataLen--) /* 传输消息缓冲区 */
76 1 {
77 2 uIndex = uchCRCHi ^ *puchMsg++ ; /* 计算CRC */
78 2 uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
79 2 uchCRCLo = auchCRCLo[uIndex] ;
80 2 }
81 1 return (uchCRCHi << 8 | uchCRCLo) ;
82 1 }//uint16 crc16(uint8 *puchMsg, uint16 usDataLen)
83
84 //开始发送
85 void beginSend(void)
86 {
87 1 //b485Send = 1; //设为发送
88 1
89 1 sendPosi = 0;
90 1 if(sendCount > 1)
91 1 sendCount--;
92 1 //ACC = sendBuf[0];
93 1 //TB8 = P;
94 1 SBUF = sendBuf[0];
95 1
96 1 }//void beginSend(void)
97
98
99 //读线圈状态
100 void readCoil(void)
101 {
102 1 uint8 addr;
103 1 uint8 tempAddr;
104 1 uint8 byteCount;
105 1 uint8 bitCount;
106 1 uint16 crcData;
107 1 uint8 position;
108 1 uint8 i,k;
109 1 uint16 tempData;
110 1 uint8 exit = 0;
111 1
112 1 //addr = (receBuf[2]<<8) + receBuf[3];
113 1 //tempAddr = addr & 0xfff;
114 1 addr = receBuf[3];
115 1 tempAddr = addr;
116 1
117 1 //bitCount = (receBuf[4]<<8) + receBuf[5]; //读取的位个数
C51 COMPILER V8.05a MODBUS 08/19/2008 15:20:43 PAGE 3
118 1 bitCount = receBuf[5];
119 1
120 1 byteCount = bitCount / 8; //字节个数
121 1 if(bitCount%8 != 0)
122 1 byteCount++;
123 1
124 1 for(k=0;k<byteCount;k++)
125 1 {//字节位置
126 2 position = k + 3;
127 2 sendBuf[position] = 0;
128 2 for(i=0;i<8;i++)
129 2 {
130 3 getCoilVal(tempAddr,&tempData);
131 3
132 3 sendBuf[position] |= tempData << i;
133 3 tempAddr++;
134 3 if(tempAddr >= addr+bitCount)
135 3 { //读完
136 4 exit = 1;
137 4 break;
138 4 }
139 3 }
140 2 if(exit == 1)
141 2 break;
142 2 }
143 1
144 1 sendBuf[0] = localAddr;
145 1 sendBuf[1] = 0x01;
146 1 sendBuf[2] = byteCount;
147 1 byteCount += 3;
148 1 crcData = crc16(sendBuf,byteCount);
149 1 sendBuf[byteCount] = crcData >> 8;
150 1 byteCount++;
151 1 sendBuf[byteCount] = crcData & 0xff;
152 1 sendCount = byteCount + 1;
153 1
154 1 beginSend();
155 1 }//void readCoil(void)
156
157 //读寄存器
158 void readRegisters(void)
159 {
160 1 uint8 addr;
161 1 uint8 tempAddr;
162 1 uint16 crcData;
163 1 uint8 readCount;
164 1 uint8 byteCount;
165 1 uint16 i;
166 1 uint16 tempData = 0;
167 1
168 1 //addr = (receBuf[2]<<8) + receBuf[3];
169 1 //tempAddr = addr & 0xfff;
170 1 addr = receBuf[3];
171 1 tempAddr = addr;
172 1
173 1 //readCount = (receBuf[4]<<8) + receBuf[5]; //要读的个数
174 1 readCount = receBuf[5];
175 1
176 1 byteCount = readCount * 2;
177 1
178 1 for(i=0;i<byteCount;i+=2,tempAddr++)
179 1 {
C51 COMPILER V8.05a MODBUS 08/19/2008 15:20:43 PAGE 4
180 2 getRegisterVal(tempAddr,&tempData);
181 2 sendBuf[i+3] = tempData >> 8;
182 2 sendBuf[i+4] = tempData & 0xff;
183 2 }
184 1
185 1 sendBuf[0] = localAddr;
186 1 sendBuf[1] = 3;
187 1 sendBuf[2] = byteCount;
188 1 byteCount += 3;
189 1 crcData = crc16(sendBuf,byteCount);
190 1 sendBuf[byteCount] = crcData >> 8;
191 1 byteCount++;
192 1 sendBuf[byteCount] = crcData & 0xff;
193 1
194 1 sendCount = byteCount + 1;
195 1 beginSend();
196 1 }//void readRegisters(void)
197
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