❶ 51單片機C語言怎麼寫Modbus通信程序
剛好我在弄crc校驗。給你一段代碼。我也是沖網上抄過來的。驗證過了。
unsigned short crc16;
static uchar code auchCRCHi[256] = {
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
};
// CRC 低位位元組值表
static uchar code auchCRCLo[256] = {
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
0x43, 0x83, 0x41, 0x81, 0x80, 0x40
};
//CRC校驗的函數
unsigned short CRC16(unsigned char *puchMsg, unsigned short usDataLen)
{
unsigned char uchCRCHi = 0xFF ; /* 高CRC位元組初始化 */
unsigned char uchCRCLo = 0xFF ; /* 低CRC 位元組初始化 */
unsigned uIndex ; /* CRC循環中的索引 */
while (usDataLen--) /* 傳輸消息緩沖區 */
{
uIndex = uchCRCHi ^ *puchMsg++ ; /* 計算CRC */
uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
uchCRCLo = auchCRCLo[uIndex] ;
}
return (uchCRCHi << 8 | uchCRCLo) ;
}
調用方式：dd=CRC16(tmp,x)；
❷ modbus嫻鐐規暟鍑芥暟奼傝В
榪欎釜鍏堣繘琛岄『搴忔暣鐞嗭紝鏄鍗佸叚榪涘埗鐨47F12000杞鎴嫻鐐規暟鏄123456.0
鍗佸叚榪涘埗鐨47F12000鐨浜岃繘鍒鏄0100 0111 1111 0001 0010 0000 0000 0000
鏈楂樹綅鏄絎﹀彿浣嶏紝0涓烘ｆ暟
8浣嶉樁鐮侊紝100 0111 1 = 143 = 127 + 16
涔熷氨鏄灝忔暟鐐圭Щ鍔16浣嶏紝鍥犳ゅ皬鏁扮偣鐨勪綅緗搴旇ユ槸
111 0001 0010 0000 0.000 0000
鍓嶉潰鍐嶅姞涓涓1錛堣繖涓鏄鍥哄畾鐨勭渷鐣ヤ竴涓1錛
灝辨槸1111 0001 0010 0000 0.000 0000
鏁存暟閮ㄥ垎灝辨槸1111 0001 0010 0000 0 = 123456
灝忔暟閮ㄥ垎灝辨槸000 0000 = 0
鍥犳ゆ渶緇堝氨鏄123456.0
璇︽儏璇風湅IEEE浜岃繘鍒舵誕鐐規暟綆楁湳鏍囧噯錛IEEE 754錛夈傞兘鏄鎸夌収榪欎釜鏍囧噯榪涜岀殑杞鎹㈣＄畻銆傝繖涓浣滀負浜嗚В鍗沖彲錛屾病鍙戠幇鏈緙栫▼璇璦闇瑕佹牴鎹榪欑嶇瑪綆楃畻娉曞幓緙栬緫杞鎹㈢畻娉曠殑銆傞兘鏄鏈夌浉搴旂殑鎸囦護鎴栬呭嚱鏁般
鏈涢噰綰熾傘傘傘傘傘
❸ 只知道客戶機IP地址,怎麼實現modbus功能，編碼遇到瓶頸了，用的是libmodbus庫，在linux系統下qt開發
C#的行嗎?可以的話我再給你大概的代碼
拿讀數據做例子,其他的功能重要改掉03功能碼就行
先組成命令的byte數組
byte[] Dp = new byte[8];
byte[] DpC = new byte[6];
Dp[0] = 0x01;//這是表的地址,假定是01
Dp[1] = 0x03;//這是功能碼,03是讀寄存器數據
Dp[2] = 0x00;
Dp[3] = 0x03;//表的相應寄存器地址
Dp[4] = 0x00;
Dp[5] = 0x0C;//表的相應寄存器參數,根據功能碼和表的不同,這幾個編碼有變化
for (int i = 0; i < 6; i++)
{
DpC[i] = Dp[i];
}
uint ValCRC;
ValCRC = CRC(DpC);//CRC為自己寫的CRC-16校驗碼的函數,具體的實現這里不給要的話可以發給你
Dp[6] = (byte)(ValCRC % 256);
Dp[7] = (byte)(ValCRC / 256);
然後把這個數組發給串口,編程語言不同發送方式不同
還在程序可以設置波特率,校驗什麼的,編程語言不同設置方式也不同
然後接受數據,也是一個byte數組
然後自己解析數組,把需要的轉化成10進制或者你需要的格式
大概就這樣
❹ ModbusTCP 紼嬪簭濡備綍瀹炵幇姝ヨ繘鐢墊満鐨勮繍鍔ㄦ柟鍚戱紵
ModbusTCP鍗忚鏄涓縐嶇敤浜庤繛鎺ュ伐涓氱數瀛愯懼囧拰鍏朵粬鍏鋒湁Modbus鎺ュ彛鐨勮懼囩殑閫氫俊鍗忚銆傚畠琚騫挎硾鐢ㄤ簬宸ヤ笟鑷鍔ㄥ寲搴旂敤涓錛屽寘鎷姝ヨ繘鐢墊満鐨勬帶鍒躲
姝ヨ繘鐢墊満鏄涓縐嶉氳繃鎺у埗鑴夊啿鏁伴噺鍜岄戠巼鏉ユ帶鍒剁數鏈烘棆杞瑙掑害鍜岄熷害鐨勭數鏈恆傚湪ModbusTCP紼嬪簭涓錛屽彲浠ラ氳繃浠ヤ笅姝ラゆ潵瀹炵幇姝ヨ繘鐢墊満鐨勮繍鍔ㄦ柟鍚戱細
1. 棣栧厛錛岄渶瑕佷嬌鐢∕odbusTCP搴撴垨API鏉ョ紪鍐橫odbusTCP瀹㈡埛絝紼嬪簭銆傝繖涓紼嬪簭灝嗕笌ModbusTCP鏈嶅姟鍣錛堥氬父鏄疨LC鎴栧伐涓歅C錛夎繘琛岄氫俊銆
2. 鍦∕odbusTCP瀹㈡埛絝紼嬪簭涓錛岄渶瑕佽劇疆ModbusTCP榪炴帴鍙傛暟錛屽寘鎷鏈嶅姟鍣↖P鍦板潃銆佺鍙ｅ彿鍜岄氫俊鍗忚絳夈
3. 鍦∕odbusTCP榪炴帴寤虹珛鍚庯紝闇瑕佷嬌鐢∕odbus鍑芥暟搴撲腑鐨凪odbusReadCoil鍑芥暟鎴朚odbusReadInputCoil鍑芥暟鏉ヨ誨彇ModbusTCP鏈嶅姟鍣ㄤ腑鐨勭嚎鍦堝瘎瀛樺櫒鐘舵併傝繖浜涘瘎瀛樺櫒閫氬父鐢ㄤ簬鎺у埗姝ヨ繘鐢墊満鐨勮繍鍔ㄦ柟鍚戙
4. 濡傛灉闇瑕佹敼鍙樻ヨ繘鐢墊満鐨勮繍鍔ㄦ柟鍚戱紝鍙浠ヤ嬌鐢∕odbusWriteCoil鍑芥暟鎴朚odbusWriteOutputCoil鍑芥暟鏉ュ啓鍏ョ嚎鍦堝瘎瀛樺櫒錛屼粠鑰屾敼鍙樻ヨ繘鐢墊満鐨勮繍鍔ㄦ柟鍚戙
5. 鍦∕odbusTCP瀹㈡埛絝紼嬪簭涓錛岃繕鍙浠ヤ嬌鐢∕odbusReadHoldingRegister鍑芥暟鎴朚odbusReadInputRegister鍑芥暟鏉ヨ誨彇淇濇寔瀵勫瓨鍣ㄦ垨杈撳叆瀵勫瓨鍣ㄤ腑鐨勫礆紝浠ヨ幏鍙栨ヨ繘鐢墊満鐨勫綋鍓嶄綅緗鎴栧叾浠栫姸鎬佷俊鎮銆
6. 鏈鍚庯紝闇瑕佸叧闂璏odbusTCP榪炴帴騫墮噴鏀捐祫婧愩
闇瑕佹敞鎰忕殑鏄錛孧odbusTCP紼嬪簭鐨勫叿浣撳疄鐜版柟寮忓彇鍐充簬浣跨敤鐨勭紪紼嬭璦鍜屽紑鍙戠幆澧冦備互涓婃ラゆ彁渚涗簡涓涓鍩烘湰鐨勬嗘灦錛屼絾鍏蜂綋鐨勫疄鐜扮粏鑺傚彲鑳戒細鏈夋墍涓嶅悓銆