MODBUS通訊+C語(yǔ)言源代碼

1、共享知識(shí)分享快樂(lè)/* */*函數(shù)名稱：strmcpy()* 輸入?yún)?shù)：共個(gè)參數(shù)；* 輸出參數(shù)：共個(gè)參數(shù)；* 返回值：* 需儲(chǔ)存的參數(shù)：共個(gè)參數(shù);* 功能介紹:(1)字符數(shù)組拷貝；* 修改日志：* 2006-3-6 17:07 Ver. 1.00開始編寫； 完成；*/*/* void strmcpy(unsigned char dest, unsigned char src, int count) */int i;for(i = 0; i < count; i +) desti = srci;desti = '0' /* */*/*函數(shù)名稱:bitmcpy()* 輸入?yún)?shù)：

2、共個(gè)參數(shù)；* 輸出參數(shù)：共個(gè)參數(shù)；* 返回值：* 需儲(chǔ)存的參數(shù)：共個(gè)參數(shù)；* 功能介紹:(1)開關(guān)量數(shù)組拷貝；* 修改日志：* 2006-3-7 14:59 Ver. 1.00卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)開始編寫; 完成；*/*/*/ void bitmcpy(int dest, int src, int count) (int i;for(i = 0; i < count; i +) (desti = srci;/*/*/*函數(shù)名稱：strmcmp()個(gè)參數(shù);個(gè)參數(shù);輸入?yún)?shù): 輸出參數(shù):*返回值:需儲(chǔ)存的參數(shù): 功能介紹：個(gè)參數(shù);(1)字符數(shù)組比較；相同則返回0,不相同則返

3、回1;修改日志：2006-3-6 17:41Ver. 1.00開始編寫; 完*/成；/*/*/ int strmcmp(unsigned char str1, unsigned char str2, int count) (int i;卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)for(i = 0; i < count; i +)(if(str1i != str2i)(return 1;)return 0;)/*/*/* 函數(shù)名稱：Datamcmp()* 輸入?yún)?shù)：共 個(gè)參數(shù)；* 輸出參數(shù)：共個(gè)參數(shù)；* 返回值：* 需儲(chǔ)存的參數(shù)： 共 個(gè)參數(shù)；* 功能介紹：(1)浮點(diǎn)數(shù)組比較；相同則返回0,不

4、相同則返回1；*修改日志：*2006-3-6 18:05 Ver. 1.00開始編寫； 完成；*2006-3-9 13:52加了一層括號(hào)，以前是錯(cuò)誤的if(!(data1i - data2i < 0.0001) &&(data1i- data2i*/-0.0001)/*/* int Datamcmp(float data1, float data2, int count)*/(int i;for(i = 0; i < count; i +)(if(!(data1i - data2i < 0.0001) &&(data1i- data2i-0.0

5、001)卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)return 1;)return 0;/*/ /*/*函數(shù)名稱：Bitmcmp()個(gè)參數(shù);個(gè)參數(shù);輸入?yún)?shù): 輸出參數(shù):*返回值:需儲(chǔ)存的參數(shù):功能介紹：個(gè)參數(shù); 開關(guān)量數(shù)組比較；相同則返回0,不相同則返回1;修改日志：2006-3-6 18:10Ver. 1.00開始編寫; 完成；*/*/*/ int Bitmcmp(int data1, int data2, int count) (int i;for(i = 0; i < count; i +) (if(data1i != data2i) (return 1;)return 0;/*卑微

6、如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)*/*/* 函數(shù)名稱：GetCRC16()* 輸入?yún)?shù)：共個(gè)參數(shù)；* 輸出參數(shù)：共個(gè)參數(shù)；* 返回值：* 需儲(chǔ)存的參數(shù)：共個(gè)參數(shù)；* 功能介紹：(1)CRC16校驗(yàn)； 返回校驗(yàn)碼；* 修改日志：* 2005-11-28 16:40Ver. 1.00開始編寫；完成；*/*/*/unsigned short GetCRC16(unsigned char *puchMsg, unsigned short usDataLen)/* CRC高位字節(jié)值表*/unsigned char auchCRCHi256 = 0x00,0xC1, 0x81, 0x40, 0x01,0

7、xC0, 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

8、,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, 0

9、x80,0x41, 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

10、,0xC0,0x80,0x41, 0x00, 0xC1, 0x81,0x40, 0x01, 0xC0,0x80,0x41,卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)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

11、, 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 )；unsigned char auchCRCLo256 = 0x00, 0xC0, 0xC1,0x01, 0xC3, 0x03, 0x02,

12、 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,

13、 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, 0

14、xEF, 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, 0xA

15、9, 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,

16、 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 );unsigned c

17、har uchCRCHi = 0xFF ; /*高 CRC1r節(jié)初始化 */unsigned char uchCRCLo = 0xFF ; /*低 CRC字節(jié)初始化 */unsigned ulndex = 0; /* CRC 循環(huán)中的索引 */while (usDataLen-) /*傳輸消息緩沖區(qū) */卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)(ulndex = uchCRCHi A *puchMsg+ ; /* 計(jì)算 CRC */ uchCRCHi = uchCRCLo a auchCRCHiuIndex;uchCRCLo = auchCRCLouIndex;)return (unsigned

18、 short)(unsigned short)uchCRCHi << 8 | uchCRCLo);)I*/*/*函數(shù)名稱：SendRtuCmdToModBus()個(gè)參數(shù);個(gè)參數(shù);輸入?yún)?shù): 輸出參數(shù):*返回值:需儲(chǔ)存的參數(shù)：共 功能介紹：個(gè)參數(shù);(1)發(fā)送 ModBus RTU指令至U Modbus Slave,力口上 CRC1皎驗(yàn)碼;修改日志：2005-11-28 16:40Ver. 1.00開始編寫；完成；*2006-3-1 9:02返回類型改為*/void ;/*/*/ void SendRtuCmdToModBus(intModPort, unsigned char cmd

19、, unsigned short len)(unsigned short CRC16;CRC16=GetCRC16(cmd,len);/* send/* sendToComBufn(ModPort,cmd,len);ToCom(ModPort, (unsigned char)(CRC16 >> 8 & 0x00FF);CRC16 high */ToCom(ModPort, (unsigned char)(CRC16 & 0x00FF);卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)CRC16 low */)/*/*/*函數(shù)名稱：輸入?yún)?shù):輸出參數(shù):*返回值:ReadModB

20、usRtuSlave()共8個(gè)參數(shù)；共5個(gè)參數(shù)；成功與否 1 :成功，2 :失敗;需儲(chǔ)存的參數(shù)： 共0個(gè)參數(shù);功能介紹：(1)讀取ModBusRtuSlave,并解碼輸出反饋?zhàn)址嚓P(guān)內(nèi)容;ReadModBusRtuSlave(COMPORT1, ModAddr, ModFunction, ModByteNum,ModData, &ModDataLen, ModTimeout=10,waitTime=30)修改日志：2005-11-28 16:40Ver. 1.00開始編寫；完成；*2006-3-1 9:23增加了 int counter = 0;unsigned char ModBu

21、sMessageMOD_STR_MAX_LEN;*2006-3-1 13:46增加了 strmcpy(ModData, ModBusMessage + 3, ModBusIdx -*/5);/*/*/ int ReadModBusRtuSlave(int ModPort, unsigned char *ModAddr, unsigned char *ModFunction, unsigned char *ModByteNum, unsigned char ModData, unsigned char *ModDataLen, unsignedModTimeout, unsigned waitT

22、ime)unsigned char data;unsigned long t;int i;unsigned short CRC16;int ModBusIdx = 0;卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)int counter = 0;unsigned char ModBusMessageMOD_STR_MAX_LEN = '0'while(!(IsCom(ModPort) && (counter < waitTime) DelayMs(1);counter +;StopWatchStart(MODBUS_STOP_WATCH);dowhile(IsCo

23、m(ModPort) &&(ModBusIdx < MOD_STR_MAX_LEN) data = ReadCom(ModPort);ModBusMessageModBusIdx +=data;StopWatchStart(MODBUS_STOP_WATCH); /*Print("%02X”,data); */StopWatchReadValue(MODBUS_STOP_WATCH, &t);while(t <= ModTimeout);if (ModBusIdx = 0) return 0;ModBusMessageModBusIdx = 

24、9;0'StopWatchStop(MODBUS_STOP_WATCH);CRC16 = GetCRC16(ModBusMessage,ModBusIdx - 2);/* for(i=0; i> 8 & 0x00FF) = ModBusMessageModBusIdx - 2 && (unsigned char)(CRC16 & 0x00FF) = ModBusMessageModBusIdx - 1)*ModAddr = ModBusMessage0;*ModFunction = ModBusMessage1;*ModByteNum = ModB

25、usMessage2;strmcpy(ModData, ModBusMessage + 3, ModBusIdx - 5);/* Print(" idx%d ", ModBusIdx - 5); /*test*/* for(i = 3; i < ModBusIdx - 2; i+)ModDatai - 3 = ModBusMessagei;ModDatai = '0'*/卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)*ModDataLen = ModBusIdx - 5;/* Print("DataLen=%dnr", *ModDataLe

26、n); */ return 1;else*ModDataLen = 0;return 0;/* CRC16 error */* Print("CRC16 Errornr"); */*/I* */ /*函數(shù)名稱：ResponseFromModBusRtuSlave()* 輸入?yún)?shù)：共8個(gè)參數(shù)；* 輸出參數(shù)：共5個(gè)參數(shù)；* 返回值：成功與否1 :成功，2 :失??；* 需儲(chǔ)存的參數(shù)： 共0個(gè)參數(shù)；* 功能介紹：(1)寫參數(shù)到 ModBusRtuSlave后，ModbusRtuSlave 反饋?zhàn)址?修改日志：2006-3-1 12:34Ver. 1.00開始編寫；*2006-3-

27、1 12:48完成；*2006-3-6 16:32strcpy(totalStr, ModBusMessage);改為 strmcpy(totalStr, ModBusMessage, ModBusIdx);*/*/* */ int ResponseFromModBusRtuSlave(int ModPort, unsigned char totalStr,卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)unsigned char *ModAddr, unsigned char *ModFunction, unsigned short *ModDataAddr,unsigned short *ModDa

28、taNum, unsigned ModTimeout, unsigned waitTime) unsigned char data;unsigned long t;unsigned short CRC16;int ModBusIdx = 0;int counter = 0;unsigned char ModBusMessageMOD_STR_MAX_LEN = '0'while(!(IsCom(ModPort) && (counter < waitTime) DelayMs(1);counter +;StopWatchStart(MODBUS_STOP_W

29、ATCH); do while(IsCom(ModPort) &&(ModBusIdx < MOD_STR_MAX_LE1N) data = ReadCom(ModPort);ModBusMessageModBusIdx +=data;StopWatchStart(MODBUS_STOP_WATCH);/*Print("%02X”,data); */StopWatchReadValue(MODBUS_STOP_WATCH, &t); while(t <= ModTimeout);if (ModBusIdx = 0) return 0;ModBusM

30、essageModBusIdx = '0;strmcpy(totalStr, ModBusMessage, ModBusIdx);StopWatchStop(MODBUS_STOP_WATCH);CRC16 = GetCRC16(ModBusMessage,ModBusIdx - 2);if(unsigned char)(CRC16 >> 8 & 0x00FF) = ModBusMessageModBusIdx-2 &&(unsigned char)(CRC16 & 0x00FF) = ModBusMessageModBusIdx 1)*Mo

31、dAddr = ModBusMessage0;卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)*ModFunction = ModBusMessage1;*ModDataAddr = (unsigned short)(unsigned short)ModBusMessage2 << 8 | ModBusMessage3);*ModDataNum = (unsigned short)(unsigned short)ModBusMessage4 << 8 | ModBusMessage5);return 1;elsereturn 0;/* CRC16 error */* Print(

32、"CRC16 Errornr"); */*/*/*函數(shù)名稱：ResponseSingleBitFromModBus()* 輸入?yún)?shù)：共8個(gè)參數(shù)；* 輸出參數(shù)：共5個(gè)參數(shù)；* 返回值：成功與否1 :成功，2 :失敗；* 需儲(chǔ)存的參數(shù)： 共0個(gè)參數(shù)；* 功能介紹：(1)寫參數(shù)到 ModBusRtuSlave后，ModbusRtuSlave 反饋?zhàn)址?* 修改日志：*2006-3-7 14:40 Ver. 1.00開始編寫；*2006-3-7 14:40完*/成；/*/*/ int ResponseSingleBitFromModBus(int ModPort, unsigne

33、d char卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)totalStr,unsigned char *ModAddr, unsigned char *ModFunction, unsigned short *ModDataAddr,unsigned short *ModDataState, unsigned ModTimeout, unsigned waitTime) unsigned char data;unsigned long t;unsigned short CRC16;int ModBusIdx = 0;int counter = 0;unsigned char ModBusMessag

34、eMOD_STR_MAX_LEN = '0'while(!(IsCom(ModPort) && (counter < waitTime)DelayMs(1);counter +;StopWatchStart(MODBUS_STOP_WATCH);dowhile(IsCom(ModPort) &&(ModBusIdx < MOD_STR_MAX_LET) data = ReadCom(ModPort);ModBusMessageModBusIdx +=data;StopWatchStart(MODBUS_STOP_WATCH);/*Pr

35、int("%02X”,data); */StopWatchReadValue(MODBUS_STOP_WATCH, &t);while(t <= ModTimeout);if (ModBusIdx = 0) return 0;ModBusMessageModBusIdx = '0;strmcpy(totalStr, ModBusMessage, ModBusIdx);StopWatchStop(MODBUS_STOP_WATCH);CRC16 = GetCRC16(ModBusMessage,ModBusIdx - 2);if(unsigned char)(CR

36、C16 >> 8 & 0x00FF) = ModBusMessageModBusIdx* 2 &&(unsigned char)(CRC16 & 0x00FF) = ModBusMessageModBusIdx 1)卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)*ModAddr = ModBusMessage0;*ModFunction = ModBusMessage1;*ModDataAddr = (unsigned short)(unsigned short)ModBusMessage2 << 8 | ModBusMessage3);if(M

37、odBusMessage4)*ModDataState= 1;else *ModDataState= 0;return 1;elsereturn 0;/* CRC16 error */* Print("CRC16 Errornr"); */*/I* */ /*函數(shù)名稱：ChangeAllParameterDataByModBus()* 輸入?yún)?shù)：共個(gè)參數(shù)；* 輸出參數(shù)：共個(gè)參數(shù)；* 返回值： 無(wú)* 需儲(chǔ)存的參數(shù)：共個(gè)參數(shù)；* 功能介紹：(1)將MODBUSSLAVE的數(shù)據(jù)字符轉(zhuǎn)化為參數(shù)值；(2) void *memcpy(void *dest, const void *sr

38、c, size_t n) (3)四個(gè)字符的順序應(yīng)倒一下。*修改日志：*2006-3-1 14:10 Ver. 1.00開始編寫；*2006-3-1 14:35完成；*2006-3-6 15:57四個(gè)字符的順序應(yīng)倒一 下。卑微如蟋蟻、堅(jiān)強(qiáng)似大象*/共享知識(shí)分享快樂(lè)/* /* */ void ChangeAllParameterDataByModBus(float parameterData, unsigned char ModDataBack, unsigned short num)int i;char singleStr5 = '0','0','0

39、9;,'0','0'float *pf;float dataf = 0;int len = 4;pf = &dataf;for(i = 0; i < num; i +)singleStr0 = ModDataBacki * 4 + 3;singleStr1 = ModDataBacki * 4 + 2;singleStr2 = ModDataBacki * 4 + 1;singleStr3 = ModDataBacki * 4 ;singleStr4 = '0'memcpy(pf, singleStr, len);parameter

40、Datai = *pf;/*Print("%-6.2ft", parameterDatai);/*test*/*/*/*函數(shù)名稱：ChangeAllButtonsDataByModBus()* 輸入?yún)?shù)：共個(gè)參數(shù)；* 輸出參數(shù)：共個(gè)參數(shù)；* 返回值：無(wú)* 需儲(chǔ)存的參數(shù)：共個(gè)參數(shù)；* 功能介紹：(1)將MODBUSSLA喇的數(shù)據(jù)字符轉(zhuǎn)化為按鈕 值；卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)*修改日志：*2006-3-1 14:03 Ver. 1.00開始編寫；*2006-3-1 14:10完*/成；/*/*1void ChangeAllButtonsDataByModBus(in

41、t buttonData, unsigned char ModDataBack, unsigned short num)unsigned char button8Data = 0;int i, j;for(j = 0; j < (int)(num / 8); j +)button8Data = ModDataBackj;for(i = 0; i < 8; i +) buttonDatai + j * 8 = (int)(button8Data & (int) pow(2, i) / (int) pow(2, i);button8Data = ModDataBackj;for

42、(i = 0; i < num % 8; i +)buttonDatai + j * 8 = (int)(button8Data & (int) pow(2, i)/ (int) pow(2, i);/*/*/*函數(shù)名稱：WordDataToModbusStr()* 輸入?yún)?shù)：共個(gè)參數(shù)；* 輸出參數(shù)：共個(gè)參數(shù)；* 返回值：無(wú)卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)需儲(chǔ)存的參數(shù)： 共 個(gè)參數(shù);功能介紹：(l)parameterData 或 AIData 轉(zhuǎn)化為 MODBUSSLAVEWORD的STR(2) void *memcpy(void *dest, const void *sr

43、c, size_t n)(3)四個(gè)字符的順序應(yīng)倒一下。*修改日志：*2006-3-1 14:37Ver. 1.00開始編寫；*2006-3-1 14:49完成；*2006-3-6 15:57四個(gè)字符的順序應(yīng)倒一下。/*尸*/*/void WordDataToModbusStr(unsigned char writeCmdStr, float data, unsigned short num, unsigned short startAddr)int i;char singleStr5 = '0','0','0','0','

44、0'float *pf;unsigned char *pstr;float dataf = 0;int len = 4;pf = &dataf;pstr = singleStr;for(i = 0; i < num; i +)*pf = datai;memcpy(pstr, pf, len);writeCmdStrstartAddr + i * 4 + 3 = singleStr0;writeCmdStrstartAddr + i * 4 + 2 = singleStr1;writeCmdStrstartAddr + i * 4 + 1 = singleStr2;writ

45、eCmdStrstartAddr + i * 4 = singleStr3;/*/卑微如蟋蟻、堅(jiān)強(qiáng)似大象共享知識(shí)分享快樂(lè)/*/*函數(shù)名稱：BitDataToModbusStr()輸入?yún)?shù):輸出參數(shù):個(gè)參數(shù);個(gè)參數(shù);*返回值:需儲(chǔ)存的參數(shù)：共 功能介紹：(1)data個(gè)參數(shù);轉(zhuǎn)化為MODBUSSLAVEWOR值的STR修改日志：2006-3-1 14:51Ver. 1.00開始編寫;*2006-3-1 15:02完*/成；/*/*/ void BitDataToModbusStr(unsigned char writeCmdStr, int data, unsigned short num, unsigned short startAddr)int i, j;unsigned char button8Data = 0;for(j = 0; j < (int)(num / 8); j +) button8Data = 0;for(i = 0; i < 8; i +) button8Data += datai + j * 8 * (int) pow(2, i);)writeCmdStrstartAddr + j = button8Data;if(num % 8) button