C语言编写modbus协议Word下载.docx

1、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,

2、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,

3、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,

4、0x44,0x84,0x85,0x45,0x87,0x47,0x46,0x86,0x82,0x42,0x43,0x83,0x41,0x81,0x80,0x40uint8testCoil;/用于测试位地址1uint16testRegister;/用于测试字址址16uint8localAddr=1;/单片机控制板的地址uint8sendCount;/发送字节个数uint8receCount;/接收到的字节个数uint8sendPosi;/发送位置uint16crc16（uint8*puchMsg,uint16usDataLen）uint8uchCRCHi=0xFF;/*高CRC字节初始化*/uin

5、t8uchCRCLo=0xFF;/*低CRC字节初始化*/uint32uIndex;/*CRC循环中的索引*/while（usDataLen-）/*传输消息缓冲区*/uIndex=uchCRCHi*puchMsg+;/*计算CRC*/uchCRCHi=uchCRCLoauchCRCHiuIndex;uchCRCLo=auchCRCLouIndex;return（uchCRCHi1）sendCount-;ACC=sendBuf0;TB8=P;SBUF=sendBuf0;/voidbeginSend（void）/读线圈状态voidreadCoil（void）uint8addr;uint8tempA

6、ddr;uint8byteCount;uint8bitCount;uint16crcData;uint8position;uint8i,k;uint8result;uint16tempData;uint8exit=0;/addr=（receBuf28）+receBuf3;/tempAddr=addr&0xfff;addr=receBuf3;tempAddr=addr;/bitCount=（receBuf48）+receBuf5;/读取的位个数bitCount=receBuf5;byteCount=bitCount/8;/字节个数if（bitCount%8!=0）byteCount+;for（k

7、=0;kbyteCount;k+）/字节位置position=k+3;sendBufposition=0;for（i=0;i8;i+）getCoilVal（tempAddr,&tempData）;sendBufposition|=tempData=addr+bitCount）/读完exit=1;break;if（exit=1）sendBuf0=localAddr;sendBuf1=0x01;sendBuf2=byteCount;byteCount+=3;crcData=crc16（sendBuf,byteCount）;sendBufbyteCount=crcDatasendBufbyteCou

8、nt=crcData&0xff;sendCount=byteCount+1;beginSend（）;/voidreadCoil（void）/读寄存器voidreadRegisters（void）uint16result;uint8readCount;uint8finsh;/1完成0出错uint16i;uint16tempData=0;/readCount=（receBuf4sendBufi+4=tempData&sendBuf1=3;/voidreadRegisters（void）/强制单个线圈voidforceSingleCoil（void）uint8onOff;uint8i;/onOff=

9、（receBuf4onOff=receBuf4;/if（onOff=0xff00）if（onOff=0xff）/设为ONtempData=1;/elseif（onOff=0x0000）elseif（onOff=0x00）/设为OFFtempData=0;setCoilVal（tempAddr,tempData）;receCount;sendBufi=receBufi;sendCount=receCount;/voidforceSingleCoil（void）/设置多个寄存器voidpresetMultipleRegisters（void）uint8setCount;/为1时完成为0时出错tem

10、pAddr=addr&/setCount=（receBuf4setCount=receBuf5;byteCount=receBuf6;setCount;i+,tempAddr+）tempData=（receBufi*2+7sendBuf3=addr&sendBuf4=setCountsendBuf5=setCount&crcData=crc16（sendBuf,6）;sendBuf6=crcDatasendBuf7=crcData&sendCount=8;/voidpresetMultipleRegisters（void）/检查uart0数据voidcheckComm0Modbus（void）

11、if（receCount4）switch（receBuf1）case1:/读取线圈状态（读取点16位以内）case3:/读取保持寄存器（一个或多个）case5:case6:/设置单个寄存器=8）/接收完成一组数据/应该关闭接收中断if（receBuf0=localAddr&checkoutError=0）crcData=crc16（receBuf,6）;if（crcData=receBuf7+（receBuf68）/校验正确if（receBuf1=1）/读取线圈状态（读取点16位以内）readCoil（）;elseif（receBuf1=3）/读取保持寄存器（一个或多个）readRegiste

12、rs（）;elseif（receBuf1=5）/强制单个线圈forceSingleCoil（）;elseif（receBuf1=6）/presetSingleRegister（）;receCount=0;checkoutError=0;case15:/设置多个线圈tempData=receBuf6;tempData+=9;/数据个数=tempData）crcData=crc16（receBuf,tempData-2）;if（crcData=（receBuftempData-28）+receBuftempData-1）/forceMultipleCoils（）;case16:tempData=（

13、receBuf4tempData=tempData*2;presetMultipleRegisters（）;default:/voidcheckComm0（void）/取线圈状态返回0表示成功uint16getCoilVal（uint16addr,uint16*tempData）uint16result=0;uint16tempAddr;/只取低8位地址switch（tempAddr&0xff）case0:*tempData=testCoil;case2:case4:case7:case8:case9:case10:case11:case12:case13:case14:returnresul

14、t;/uint16getCoilVal（uint16addr,uint16*data）/设定线圈状态返回0表示成功uint16setCoilVal（uint16addr,uint16tempData）testCoil=tempData;/uint16setCoilVal（uint16addr,uint16data）/取寄存器值返回0表示成功uint16getRegisterVal（uint16addr,uint16*tempData）*tempData=testRegister;/uint16getRegisterVal（uint16addr,uint16&data）/设置寄存器值返回0表示成功uint16setRegisterVal（uint16addr,uint16tempData）testRegister=tempData;/uin