老 姚
/
modbusServer2
modbus for modular2_dio10
Diff: modbus/modbus.cpp
- Revision:
- 0:998a68b8defc
- Child:
- 1:8fcbafe2ca98
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/modbus/modbus.cpp Tue Sep 17 01:59:40 2019 +0000 @@ -0,0 +1,204 @@ +#include "modbus.h" +#define MODBUS_DEFAULT_BAUD_RATE 9600 + const char 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 +}; +const char 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 +}; +Modbus::Modbus(PinName tx, PinName rx,PinName txEnable, int baud) +: rs485(tx, rx,baud), +dir(txEnable) +{ + rs485.format(8, Serial::None, 1); + } +bool Modbus::sendQuery(uint8_t address,uint8_t function,uint16_t startAddress,uint16_t points) +{ int index,i; + index=0; + _address=address; + _function=function; + _startAddress=startAddress; + _points=points; + sbuf[index++]=address; + sbuf[index++]=function; + sbuf[index++]=(startAddress>>8)&0xff; + sbuf[index++]=startAddress&0xff; + sbuf[index++]=(points>>8)&0xff; + sbuf[index++]=points&0xff; + unsigned short resultCRC = calculateCRC16(sbuf,index); + sbuf[index++]=(resultCRC>>8)&0xff; + sbuf[index++]=resultCRC&0xff; + dir=1; + wait_ms(2); + for (i=0;i<index;i++) + { + rs485.putc(sbuf[i]); + + } + wait_ms(2); + dir=0; + return true; + } +int Modbus::waitResponse(uint8_t *data) + { unsigned short resultCRC ,recCRC; + + int state,index,len,cnt,i; + uint8_t ch; + bool flag; + flag=true; + state=0; + index=0; + while(flag) + { ch=rs485.getc(); + + switch(state) + { + case 0:{ + if (ch==_address) + {state=1; + rbuf[index++]=ch;} + break; + } + case 1:{ + + if (ch==_function) + {state=2;rbuf[index++]=ch;} + else if(ch==(_function+0x80)) + state=10; + else + return 0; + break; + } + case 2:{ + len=ch;cnt=ch; + rbuf[index++]=ch; + state=3; + break; + } + case 3:{ + rbuf[index++]=ch; + cnt--; + if (cnt==0) + { + state=4; + + } + break; + } + case 4:{ + recCRC=ch; + state=5; + break; + } + case 5:{ + recCRC=(recCRC<<8)|ch; + resultCRC = calculateCRC16(rbuf,index); + // printf("CRC=%02x,%02x\n",recCRC,resultCRC); + if (recCRC==resultCRC) { + for (i=0;i<len;i++) + data[i]=rbuf[3+i]; + return len; + } + else return 0; + } + case 10:{ + len=0; + flag=false; + break; + } + } + } + + return len; + } +bool Modbus::waitQuery(uint8_t &address,uint8_t &function,uint16_t &startAddress,uint16_t &points) +{ +unsigned short resultCRC ,recCRC; + int i; + for (i=0;i<8;i++) + rbuf[i]=rs485.getc(); + resultCRC = calculateCRC16(rbuf,6); + recCRC=(rbuf[6]<<8)|rbuf[7]; + if ( resultCRC!=recCRC) return false; + address=rbuf[0]; + _address=rbuf[0]; + function=rbuf[1]; + _function=rbuf[1]; + _startAddress=(rbuf[2]<<8)|rbuf[3]; + startAddress=_startAddress; + _points=(rbuf[4]<<8)|rbuf[5]; + points=_points; + return true; + } + bool Modbus::sendResponse(uint8_t *data,uint8_t length) + { + unsigned short resultCRC; + int index,i; + index=0; + sbuf[index++]=_address; + sbuf[index++]=_function; + sbuf[index++]= length; + for (i=0;i<length;i++) + sbuf[index++]=data[i]; + resultCRC = calculateCRC16(rbuf,index); + sbuf[index++]=(resultCRC>>8)&0xff; + sbuf[index++]=resultCRC &0xff; + for (i=0;i<index;i++) + rs485.putc(sbuf[i]) ; + return true; + } +unsigned int Modbus::calculateCRC16( uint8_t *puchMsg,unsigned int usDataLen) +{ + unsigned char uchCRCHi,uchCRCLo; + unsigned char uIndex=0 ; /* will index into CRC lookup table */ + unsigned char tempp=0; + unsigned int CRCHL=0; + uchCRCHi=0xFF ; // high byte of CRC initialized + uchCRCLo=0xFF ; + tempp=0; // low byte of CRC initialized + while(usDataLen--) // pass through message buffer + { + uIndex=uchCRCHi^*puchMsg++ ; // calculate the CRC high byte + tempp++; + uchCRCHi=uchCRCLo^auchCRCHi[uIndex] ;//01-auchCRCHi[254]:0x81;02-0x01;03-0x80;04-0xC0 + uchCRCLo=auchCRCLo[uIndex] ; + } + CRCHL=uchCRCHi; + CRCHL=CRCHL<<8; + CRCHL|=uchCRCLo; + return CRCHL;//(uchCRCHi<<8|uchCRCLo) ;//uchCRCHi:0xa1;uchCRCLo:2B +}