modbus RTU 的 C51 单片机 程序(12页).doc

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1、-modbus RTU 的 C51 单片机 程序-第 12 页modbus RTU 的 C51 单片机 程序本文转自：新势力单片机 urlhttp:/www.XinShiL/urlmodbus.c#include main.h/字地址 0 - 255 (只取低8位)/位地址 0 - 255 (只取低8位)/* CRC 高位字节值表 */ const uint8 code auchCRCHi = 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01,

2、 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,

3、 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,

4、 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,

5、 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,

6、 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低位字节值表*/ const uint8 code auchCRCLo = 0x00, 0xC0, 0xC1, 0x01

7、, 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

8、, 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

9、, 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

10、, 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

11、, 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

12、, 0x80, 0x40 uint8 testCoil; /用于测试 位地址1uint16 testRegister; /用于测试 字址址16uint8 localAddr = 1; /单片机控制板的地址uint8 sendCount; /发送字节个数uint8 receCount; /接收到的字节个数uint8 sendPosi; /发送位置uint16 crc16(uint8 *puchMsg, uint16 usDataLen) uint8 uchCRCHi = 0xFF ; /* 高CRC字节初始化 */ uint8 uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */

13、 uint32 uIndex ; /* CRC循环中的索引 */ while (usDataLen-) /* 传输消息缓冲区 */ uIndex = uchCRCHi *puchMsg+ ; /* 计算CRC */ uchCRCHi = uchCRCLo auchCRCHiuIndex ; uchCRCLo = auchCRCLouIndex ; return (uchCRCHi 1) sendCount-;ACC = sendBuf0;TB8 = P;SBUF = sendBuf0;/void beginSend(void)/读线圈状态void readCoil(void)uint8 add

14、r;uint8 tempAddr;uint8 byteCount;uint8 bitCount;uint16 crcData;uint8 position;uint8 i,k;uint8 result;uint16 tempData;uint8 exit = 0;/addr = (receBuf28) + receBuf3; /tempAddr = addr & 0xfff;addr = receBuf3;tempAddr = addr;/bitCount = (receBuf48) + receBuf5; /读取的位个数bitCount = receBuf5;byteCount = bitC

15、ount / 8; /字节个数if(bitCount%8 != 0) byteCount+;for(k=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) break;sendBuf0 = localAddr;sendBuf1 = 0x01; sendBuf2 = byteCo

16、unt;byteCount += 3;crcData = crc16(sendBuf,byteCount); sendBufbyteCount = crcData 8;byteCount+;sendBufbyteCount = crcData & 0xff;sendCount = byteCount + 1;beginSend(); /void readCoil(void) /读寄存器void readRegisters(void) uint8 addr; uint8 tempAddr; uint16 result; uint16 crcData; uint8 readCount; uint8

17、 byteCount; uint8 finsh; /1完成 0出错 uint16 i; uint16 tempData = 0; /addr = (receBuf28) + receBuf3; /tempAddr = addr & 0xfff; addr = receBuf3; tempAddr = addr; /readCount = (receBuf48) + receBuf5; /要读的个数 readCount = receBuf5; byteCount = readCount * 2; for(i=0;i 8; sendBufi+4 = tempData & 0xff; sendBuf

18、0 = localAddr; sendBuf1 = 3; sendBuf2 = byteCount; byteCount += 3; crcData = crc16(sendBuf,byteCount); sendBufbyteCount = crcData 8; byteCount+; sendBufbyteCount = crcData & 0xff; sendCount = byteCount + 1; beginSend();/void readRegisters(void)/强制单个线圈void forceSingleCoil(void)uint8 addr;uint8 tempAd

19、dr;uint16 tempData;uint8 onOff;uint8 i;/addr = (receBuf28) + receBuf3; /tempAddr = addr & 0xfff;addr = receBuf3;tempAddr = addr;/onOff = (receBuf48) + receBuf5; onOff = receBuf4;/if(onOff = 0xff00)if(onOff = 0xff) /设为ON tempData = 1;/else if(onOff = 0x0000)else if(onOff = 0x00) /设为OFF tempData = 0;s

20、etCoilVal(tempAddr,tempData); for(i=0;ireceCount;i+) sendBuf = receBuf;sendCount = receCount;beginSend(); /void forceSingleCoil(void)/设置多个寄存器void presetMultipleRegisters(void)uint8 addr;uint8 tempAddr;uint8 byteCount;uint8 setCount;uint16 crcData;uint16 tempData;uint8 finsh; /为1时完成 为0时出错uint8 i;/add

21、r = (receBuf28) + receBuf3;/tempAddr = addr & 0xfff;addr = receBuf3;tempAddr = addr & 0xff;/setCount = (receBuf48) + receBuf5;setCount = receBuf5;byteCount = receBuf6; for(i=0;isetCount;i+,tempAddr+) tempData = (receBufi*2+7 8;sendBuf3 = addr & 0xff;sendBuf4 = setCount 8;sendBuf5 = setCount & 0xff;c

22、rcData = crc16(sendBuf,6);sendBuf6 = crcData 8;sendBuf7 = crcData & 0xff;sendCount = 8;beginSend(); /void presetMultipleRegisters(void)/检查uart0数据void checkComm0Modbus(void)uint16 crcData;uint16 tempData;if(receCount 4) switch(receBuf1) case 1:/读取线圈状态(读取点 16位以内) case 3:/读取保持寄存器(一个或多个) case 5:/强制单个线圈

23、case 6:/设置单个寄存器 if(receCount = 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+(receBuf6= tempData) if(receBuf0=localAddr & checkoutError=0) crcData = crc16(receBuf,tempData-2); if(crcData = (receBuftempData-28)+ receBuftempData-1) /f

24、orceMultipleCoils(); receCount = 0; checkoutError = 0; break; case 16:/设置多个寄存器 tempData = (receBuf4= tempData) if(receBuf0=localAddr & checkoutError=0) crcData = crc16(receBuf,tempData-2); if(crcData = (receBuftempData-28)+ receBuftempData-1) presetMultipleRegisters(); receCount = 0; checkoutError =

25、 0; break; default: break; /void checkComm0(void)/取线圈状态 返回0表示成功uint16 getCoilVal(uint16 addr,uint16 *tempData)uint16 result = 0;uint16 tempAddr;tempAddr = addr & 0xfff;/只取低8位地址switch(tempAddr & 0xff) case 0: break; case 1: *tempData = testCoil; break; case 2: break; case 3: break; case 4: break; cas

26、e 5: break; case 6: break; case 7: break; case 8: break; case 9: break; case 10: break; case 11: break; case 12: break; case 13: break; case 14: break; case 15: break; case 16: break; default: break; return result;/uint16 getCoilVal(uint16 addr,uint16 *data)/设定线圈状态 返回0表示成功uint16 setCoilVal(uint16 ad

27、dr,uint16 tempData)uint16 result = 0;uint16 tempAddr;tempAddr = addr & 0xfff;switch(tempAddr & 0xff) case 0: break; case 1: testCoil = tempData; break; case 2: break; case 3: break; case 4: break; case 5: break; case 6: break; case 7: break; case 8: break; case 9: break; case 10: break; case 11: bre

28、ak; case 12: break; case 13: break; case 14: break; case 15: break; case 16: break; default: break; return result;/uint16 setCoilVal(uint16 addr,uint16 data)/取寄存器值 返回0表示成功uint16 getRegisterVal(uint16 addr,uint16 *tempData)uint16 result = 0;uint16 tempAddr;tempAddr = addr & 0xfff;switch(tempAddr & 0x

29、ff) case 0: break; case 1: break; case 2: break; case 3: break; case 4: break; case 5: break; case 6: break; case 7: break; case 8: break; case 9: break; case 10: break; case 11: break; case 12: break; case 13: break; case 14: break; case 15: break; case 16: *tempData = testRegister; break; default:

30、 break; return result;/uint16 getRegisterVal(uint16 addr,uint16 &data)/设置寄存器值 返回0表示成功uint16 setRegisterVal(uint16 addr,uint16 tempData)uint16 result = 0;uint16 tempAddr;tempAddr = addr & 0xfff;switch(tempAddr & 0xff) case 0: break; case 1: break; case 2: break; case 3: break; case 4: break; case 5:

31、break; case 6: break; case 7: break; case 8: break; case 9: break; case 10: break; case 11: break; case 12: break; case 13: break; case 14: break; case 15: break; case 16: testRegister = tempData; break; default: break; return result;/uint8 setRegisterVal(uint16 addr,uint16 data)本文转自：新势力单片机 urlhttp:/www.XinShiL/url