1、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,
2、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,
3、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,
4、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,
5、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 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
6、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 */ 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 = a
7、uchCRCLouIndex ; return (uchCRCHi 1) sendCount-;ACC = sendBuf0;TB8 = P;SBUF = sendBuf0;/void beginSend(void)/读线圈状态void readCoil(void)uint8 addr;uint8 tempAddr;uint8 byteCount;uint8 bitCount;uint16 crcData;uint8 position;uint8 i,k;uint8 result;uint16 tempData;uint8 exit = 0;/addr = (receBuf28) + rece
8、Buf3;/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=0;kbyteCount;k+)/字节位置 position = k + 3; sendBufposition = 0; for(i=0;i8;i+) getCoilVal(tempAddr,&tempData);
9、 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 = crcData 8;byteCount+;sendBufbyteCount = crcData & 0xff;sendCount = byteCount + 1;beginSend();/
10、void readCoil(void) /读寄存器void readRegisters(void) uint8 addr; uint8 tempAddr; uint16 result; uint16 crcData; uint8 readCount; uint8 byteCount; uint8 finsh; /1完成 0出错 uint16 i; uint16 tempData = 0; /addr = (receBuf2 /tempAddr = addr & addr = receBuf3; tempAddr = addr; /readCount = (receBuf4 sendBufi+4
11、 = tempData & sendBuf0 = localAddr; sendBuf1 = 3; sendBuf2 = byteCount; byteCount += 3; crcData = crc16(sendBuf,byteCount); sendBufbyteCount = crcData sendBufbyteCount = crcData & sendCount = byteCount + 1; beginSend();/void readRegisters(void)/强制单个线圈void forceSingleCoil(void)uint8 onOff;uint8 i;/on
12、Off = (receBuf4onOff = 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;setCoilVal(tempAddr,tempData);for(i=0;receCount; sendBuf = receBuf;sendCount = receCount;/void forceSingleCoil(void)/设置多个寄存器void presetMultipleRegi
13、sters(void)uint8 setCount;uint8 finsh; /为1时完成 为0时出错tempAddr = addr &/setCount = (receBuf4setCount = receBuf5;byteCount = receBuf6;setCount;i+,tempAddr+) tempData = (receBufi*2+7sendBuf3 = addr &sendBuf4 = setCount sendBuf5 = setCount &crcData = crc16(sendBuf,6);sendBuf6 = crcData sendBuf7 = crcData
14、&sendCount = 8;/void presetMultipleRegisters(void)/检查uart0数据void checkComm0Modbus(void)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: 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);
15、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(); else if(receBuf1 = 3) /读取保持寄存器(一个或多个) readRegisters(); else if(receBuf1 = 5) /强制单个线圈 forceSingleCoil(); else if(receBuf1 = 6) /presetSingleRegister(); receCount = 0; checkoutError = 0; case 15:/设置多个线圈 tempData =
16、receBuf6; tempData += 9; /数据个数= tempData) crcData = crc16(receBuf,tempData-2); if(crcData = (receBuftempData-28)+ receBuftempData-1) /forceMultipleCoils(); case 16: tempData = (receBuf4 tempData = tempData * 2; presetMultipleRegisters(); default:/void checkComm0(void)/取线圈状态 返回0表示成功uint16 getCoilVal(
17、uint16 addr,uint16 *tempData)uint16 result = 0;uint16 tempAddr;/只取低8位地址switch(tempAddr & 0xff) case 0: *tempData = testCoil; case 2: case 4: case 7: case 8: case 9: case 10: case 11: case 12: case 13: case 14:return result;/uint16 getCoilVal(uint16 addr,uint16 *data)/设定线圈状态 返回0表示成功uint16 setCoilVal(uint16 addr,uint16 tempData) testCoil = tempData;
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