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unsigned long const Crc32Table[256] = { 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }; /* void GetCRC32Table(){ int i,j; unsigned long Crc; for (i = 0; i < 256; i++){ Crc = i; for (j = 0; j < 8; j++){ if (Crc & 1) Crc = (Crc >> 1) ^ 0xEDB88320; else Crc >>= 1; } Crc32Table[i] = Crc; } } */ unsigned int GetCrc32(unsigned char* buf,int len) { unsigned int crc = 0xffffffff; while (len--) { crc = (crc >> 8) ^ Crc32Table[(crc & 0xFF) ^ *buf++]; } return crc; } /* Calculate the CRC valude of the Rx packet flag = 1 : return the reverse CRC (for the received packet CRC) 0 : return the normal CRC (for Hash Table index) */ static unsigned long cal_CRC(unsigned char * Data, unsigned int Len, unsigned char flag) { unsigned long crc = GetCrc32(Data, Len); if (flag) return ~crc; return crc; } /* Set DM9000x/DM9010x multicast address */ unsigned long dm9000_hash_table(unsigned char *ipaddr) { unsigned long hash_val; unsigned short i, oft, hash_table[4]; unsigned char macaddr[6] = {0}; if (ipaddr != NULL) { memcpy(&macaddr[3], (unsigned char *)&ipaddr[1], 3); macaddr[3] &= 0x7F; macaddr[0] = 0x01; macaddr[1] = 0x00; macaddr[2] = 0x5E; } /* Set Node address */ for (i = 0, oft = 0x10; i < 6; i++, oft++) DM9000_iow(oft, own_hw_adr[i]); /* Clear Hash Table */ for (i = 0; i < 4; i++) hash_table[i] = 0x0; /* broadcast address */ hash_table[3] = 0x8000; /* the multicast address in Hash Table : 64 bits */ hash_val = cal_CRC(macaddr, 6, 0) & 0x3f; hash_table[hash_val / 16] |= (unsigned short) 1 << (hash_val % 16); /* Write the hash table to MAC MD table */ for (i = 0, oft = 0x16; i < 4; i++) { DM9000_iow(oft++, hash_table[i] & 0xff); DM9000_iow(oft++, (hash_table[i] >> 8) & 0xff); } return hash_val; }
发表评论
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stm8 stm32 nop
2012-09-21 09:15 1244stm8s103f3 0x8000-0x9FFF: 0x9D ... -
CoreSight Debug and Trace Connectors
2012-09-17 09:18 862CoreSight Debug and Trace Conne ... -
DM9006 linux driver
2012-08-15 13:02 1503DM9006 linux driver http://www ... -
hsb_to_rgb
2012-06-20 16:33 0static void hsb_to_rgb(uint1 ... -
stm32 jpeg
2012-05-08 10:06 0jpeg -
STM32和STM8各系列选型表
2012-04-24 13:40 1116STM32和STM8各系列选型表 -
研华推出基于Freescale i.MX53的ARM核心板
2012-02-10 13:36 1041http://www.eepw.com.cn/article/ ... -
helix
2011-11-25 16:34 0helix -
audio dsp
2011-11-07 16:39 0http://alldsp.com/index.html ... -
stm32 softreset
2011-11-07 10:07 984SCB->AIRCR = 0x05FA0004; -
MDK FS driver for STM32
2011-11-01 20:46 1095/*-------------------------- ... -
VS1003B Debug
2011-10-06 08:50 0VS1003B 在SM_SDISHARE模式下不能连续soft ... -
stm32 中断号 for IAR PowerPac
2011-09-20 16:53 195100 DCD __intial_s ... -
DM9000A for KEIL RL-NET driver
2011-08-22 09:05 1916DM9000AEP 在KEIL RL-NET下的驱动程序,从u ... -
DM9000
2011-08-02 11:42 0/*========================== ... -
用DAC产生正弦波
2011-06-29 14:34 1466MCU: C8051F330, Fmax: 23KHz ... -
STM32 MP3
2011-06-28 09:15 904http://bbs.21ic.com/viewthread. ... -
stm32 lib
2011-04-16 22:00 1107stm32
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