답글 감사드립니다. 덕분에 해결했습니다.


송신영 님이 쓰신 글 :
: Unit1.cpp에 해당 변수 선언하시고
: Unit1.h 에는 extern WORD Crc16_Table[256]; 이렇게 선언만 하세요.
:
: 왕초보 님이 쓰신 글 :
: : CRC16을 Form 여러군데서 쓰기 위해 Unit1.h에 아래의 내용을 추가했는데요
: :
: : [Linker Warning] Public symbol '_Crc16_Table' defined in both module D:\CRC16 TEST\UNIT1.OBJ and D:\CRC16 TEST\UNIT2.OBJ
: : [Linker Warning] Public symbol '_Crc16_Table' defined in both module D:\CRC16 TEST\UNIT1.OBJ and D:\CRC16 TEST\UNIT4.OBJ
: :
: : 이와 같은 에러가 무수히 많이 뜹니다. 다른곳에서 같은 이름이 정의가 되었다는데..
: : Crc16_Table의 변수명을 다른것으로 바꾸어도 마찬가지입니다.
: : 제가 어떤 부분을 잘못하고 있는건지 도움 부탁드리겠습니다.
: :
: : -------- Unit.h에 추가내용 ----------
: : #define CRC_16_POLYNOMIAL       0x1021
: : #define CRC_16_SEED             0x0000
: : #define CRC_16_STEP_SEED        (~((word) CRC_16_SEED))
: :
: : WORD Crc16_Table[256] = {
: : 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
: : 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
: : 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
: : 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
: : 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
: : 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
: : 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
: : 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
: : 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
: : 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
: : 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
: : 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
: : 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
: : 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
: : 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
: : 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
: : 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
: : 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
: : 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
: : 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
: : 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
: : 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
: : 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
: : 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
: : 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
: : 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
: : 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
: : 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
: : 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
: : 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
: : 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
: : 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0};
: :
: : extern WORD Generate_CRC (byte *buf_ptr, int len)
: : {
: :     WORD data, crc_16;
: :     len *= 8;
: :     for (crc_16=CRC_16_SEED;len>=8;len-=8,buf_ptr++)
: :     {
: :         crc_16 = Crc16_Table[ (crc_16 >> 8) ^ * buf_ptr ] ^ (crc_16 << 8);
: :     }
: :     if (len != 0)
: :     {
: :         data = ((WORD) (*buf_ptr)) << (8);
: :         while (len-- != 0)
: :         {
: :             if ( ((crc_16 ^ data) & ((WORD) 1 << 15)) != 0 )
: :             {
: :             crc_16 <<= 1;
: :             crc_16 ^= CRC_16_POLYNOMIAL;
: :             }
: :             else crc_16 <<= 1;
: :             data <<= 1;
: :         }
: :     }
: :     return (crc_16);
: : }