AC-Motor-FU6815/User/source/Hardware/CRC.c

#include "CRC.h"
#include <FU68xx_5_MDU.h>

//uint8 TestBuff[] =
//{
//    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
//    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
//    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
//    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
//    0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
//    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
//    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
//    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
//	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
//    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
//    0xA0, 0xA1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
//    0xB0, 0xB1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
//    0xC0, 0xC1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
//    0xD0, 0xD1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
//    0xE0, 0xE1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
//    0xF0, 0xF1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
//};

/****************************************************************************
CRC16_CCITT_FALSE	纯软件C语言实现
****************************************************************************/
//unsigned short CRC16_CCITT_FALSE(unsigned char *puchMsg, unsigned int usDataLen)
//{
//    unsigned char i = 0;
//    unsigned short wCRCin = 0xFFFF;
//    unsigned short wCPoly = 0x1021;
//    unsigned char wChar = 0;
//  
//    while (usDataLen--) 	
//    {
//    	wChar = *(puchMsg++);
//    	wCRCin ^= (wChar << 8);
//    	for(i = 0;i < 8;i++)
//    	{
//    		if(wCRCin & 0x8000)
//    			wCRCin = (wCRCin << 1) ^ wCPoly;
//    		else
//    			wCRCin = wCRCin << 1;
//    	}
//    }
//    return (wCRCin);
//}


/****************************************************************************
CRC16_CCITT_FALSE	硬件实现
****************************************************************************/
unsigned short CRC_Check(unsigned char start_sector , unsigned char offset_sector)
{
    unsigned short crcresult = 0x0000;

    unsigned short tempH = 0x00;
    unsigned short tempL = 0x00;

    SetBit(CRC_CR , CRCVAL);		//0-->0x0000  1-->0xffff
    SetBit(CRC_CR , CRCDINI);		//1-->init success

    CRC_BEG = start_sector;	    //起始扇区
    CRC_CNT = offset_sector;	//扇区偏移量	0-->1个扇区

    //1个空扇区-->0x41E8	 2个空扇区-->0x1634
    //1个0xFF  -->0x5B2F	 0x00~0xFF-->0x3FBD
    SetBit(CRC_CR , AUTOINT);		//自动计算使能
    /***************************************************/

    SetBit(CRC_CR , CRCPNT);	
    tempH = CRC_DR;
    ClrBit(CRC_CR , CRCPNT);	
    tempL = CRC_DR;
    crcresult = (unsigned short)(tempH << 8) + tempL;
    return crcresult;
}