Android can use the Modebus CRC16 calculation, attached to the corresponding C language CRC16

Source: Android can use the Modebus CRC16 calculation, attached to the corresponding C language CRC16

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Body:

Recently wrote Android serial communication needs to use the Modebus of CRC16 communication, online find a lot of is a string, I need a byte, because Java has no unsigned number, conversion a little trouble, a test of C a

The code is as follows:

Java

intCrc16_check (bytePushdata[],intlength) {      intReg_crc=0xffff; inttemp; inti,j;  for(i = 0; i<length; i + +)) {Temp=Pushdata[i]; if(Temp < 0) Temp + + 256; Temp&= 0xFF; REG_CRC^=temp;  for(j = 0; j<8; J + +)         {             if((REG_CRC & 0x0001) = = 0x0001) REG_CRC= (reg_crc>>1) ^0xa001; ElseREG_CRC>>=1; }        }      return(REG_CRC&AMP;0XFFFF); } 

C

U16 Crc16_check (U8 *pushdata,u16 length) {U16 REG_CRC=0xFFFF; U8 Temp_reg=0x00;            U16 I,j;  for(i =0; i<length; i + +) {REG_CRC^= *pushdata++;  for(j =0; j<8; J + +)          {                 if(REG_CRC &0x0001) REG_CRC=reg_crc>>1^0xa001; ElseREG_CRC>>=1; }        }      return(REG_CRC); } 

Android can use the Modebus CRC16 calculation, attached to the corresponding C language CRC16 (turn)