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- /************************************************************************
- * 模块名称：CRC.c
- * 程序功能�
- * 编 写 者：TNT
- * 编写日期：2014-01-12
- * 修 改 者：
- * 修改日期：
- * 编译环境：KEIL4 MDK ARM V4.71.2.0
- * 硬件平台：STM32F103RBT6
- ************************************************************************/
-
- /************************************************************************/
- /* */
- /* */
- /* INCLUDES */
- /* */
- /* */
- /************************************************************************/
- #include "crc.h"
- /************************************************************************/
- /* */
- /* */
- /* DEFINITION */
- /* */
- /* */
- /************************************************************************/
-
- /************************************************************************/
- /* */
- /* */
- /* DECLARATION */
- /* */
- /* */
- /************************************************************************/
-
- /************************************************************************/
- /* */
- /* */
- /* VARIABLE */
- /* */
- /* */
- /************************************************************************/
- unsigned char const CRC_TAB[256]=
- {
- 0x00,0xd5,0x7f,0xaa,0xfe,0x2b,0x81,0x54,0x29,0xfc,0x56,0x83,0xd7,0x02,0xa8,0x7d,
- 0x52,0x87,0x2d,0xf8,0xac,0x79,0xd3,0x06,0x7b,0xae,0x04,0xd1,0x85,0x50,0xfa,0x2f,
- 0xa4,0x71,0xdb,0x0e,0x5a,0x8f,0x25,0xf0,0x8d,0x58,0xf2,0x27,0x73,0xa6,0x0c,0xd9,
- 0xf6,0x23,0x89,0x5c,0x08,0xdd,0x77,0xa2,0xdf,0x0a,0xa0,0x75,0x21,0xf4,0x5e,0x8b,
- 0x9d,0x48,0xe2,0x37,0x63,0xb6,0x1c,0xc9,0xb4,0x61,0xcb,0x1e,0x4a,0x9f,0x35,0xe0,
- 0xcf,0x1a,0xb0,0x65,0x31,0xe4,0x4e,0x9b,0xe6,0x33,0x99,0x4c,0x18,0xcd,0x67,0xb2,
- 0x39,0xec,0x46,0x93,0xc7,0x12,0xb8,0x6d,0x10,0xc5,0x6f,0xba,0xee,0x3b,0x91,0x44,
- 0x6b,0xbe,0x14,0xc1,0x95,0x40,0xea,0x3f,0x42,0x97,0x3d,0xe8,0xbc,0x69,0xc3,0x16,
- 0xef,0x3a,0x90,0x45,0x11,0xc4,0x6e,0xbb,0xc6,0x13,0xb9,0x6c,0x38,0xed,0x47,0x92,
- 0xbd,0x68,0xc2,0x17,0x43,0x96,0x3c,0xe9,0x94,0x41,0xeb,0x3e,0x6a,0xbf,0x15,0xc0,
- 0x4b,0x9e,0x34,0xe1,0xb5,0x60,0xca,0x1f,0x62,0xb7,0x1d,0xc8,0x9c,0x49,0xe3,0x36,
- 0x19,0xcc,0x66,0xb3,0xe7,0x32,0x98,0x4d,0x30,0xe5,0x4f,0x9a,0xce,0x1b,0xb1,0x64,
- 0x72,0xa7,0x0d,0xd8,0x8c,0x59,0xf3,0x26,0x5b,0x8e,0x24,0xf1,0xa5,0x70,0xda,0x0f,
- 0x20,0xf5,0x5f,0x8a,0xde,0x0b,0xa1,0x74,0x09,0xdc,0x76,0xa3,0xf7,0x22,0x88,0x5d,
- 0xd6,0x03,0xa9,0x7c,0x28,0xfd,0x57,0x82,0xff,0x2a,0x80,0x55,0x01,0xd4,0x7e,0xab,
- 0x84,0x51,0xfb,0x2e,0x7a,0xaf,0x05,0xd0,0xad,0x78,0xd2,0x07,0x53,0x86,0x2c,0xf9
-
- };
-
- /************************************************************************/
- /* */
- /* */
- /* IMPLEMENTATION */
- /* */
- /* */
- /************************************************************************/
- /*********************************************************************
- ; 发送的CRC校验过程：
- ; (1) CRC校验初值为0xFF，放入某个变量（如CRC_temp）中，
- ; (2) 对每一个发送字节TX[i]，i=0,...,Send_num,
- ; { 将CRC_temp与TX[i]异或，结果设为CRCTab_Adresss
- ; 根据CRCTab_Adresss查CRC表，得到的值放回CRC_temp中
- ; }
- ; (3) 全部发送结束，则发送CRC_temp作为CRC校验码
- ;
- ; 接收的CRC校验过程：
- ; (1) CRC校验初值为0xFF，放入某个变量（如CRC_temp）中，
- ; (2) 对每一个接收到的字节RX[i]，i=0,...,RCV_num,CRC校验码
- ; { 将CRC_temp与TX[i]异或，结果设为CRCTab_Adresss
- ; 根据CRCTab_Adresss查CRC表，得到的值放回CRC_temp中
- ; }
- ; (3) 全部接收结束，则CRC_temp中的结果如果是0，则CRC校验成功，否则失败
- *********************************************************************/
-
- /***********************************************************************
- * 函 数 名: CheckCrc()
- * 功能描述:
- * 函数说明:
- * 调用函数: 无
- * 全局变量: 无
- * 输 入: 无
- * 返 回:
- * 设 计 者：XX 日期：2003-10-15
- * 修 改 者：XX 日期：
- * 版 本：0.01
- ***********************************************************************/
- unsigned char CheckCrc(unsigned char *ptr,unsigned char leng)
- {
- unsigned char i;
- unsigned char bytetemp=0xff; //seed value
- for(i=0;i<leng;i++)
- bytetemp=CRC_TAB[bytetemp^ptr[i]];
- return(bytetemp);
- }
- /***********************************************************************
- * 函 数 名: CalcCrc()
- * 功能描述:
- * 函数说明:
- * 调用函数: 无
- * 全局变量: 无
- * 输 入: 无
- * 返 回:
- * 设 计 者：XX 日期：2003-10-15
- * 修 改 者：XX 日期：
- * 版 本：0.01
- ***********************************************************************/
- unsigned char CalcCrc(unsigned char runingcrc,unsigned char addtocrc)
- {
- return(CRC_TAB[runingcrc^addtocrc]);
- }
-
- /*********************************************************************
- ; 发送的ccTalk CheckSum 校验过程：
- ; (1) CheckSum is what makes the 8 less important bits of the
- ; sum of all the bytes of the message, including the actual
- ; checksum , give '0' as the result.
- ;
- ; (2) example:
- ; the message 01 00 02 00 will be followed by checksum 253 because:
- ; 01 00 02 00 FD
- ;
- ; 1 + 0 + 2 + 0 + 253 = 256 = 0
- *********************************************************************/
- /***********************************************************************
- * 函 数 名: unsigned char CheckSum(unsigned char *ptr,unsigned char leng)
- * 功能描述:
- * 函数说明:
- * 调用函数: 无
- * 全局变量: 无
- * 输 入: 无
- * 返 回:
- * 设 计 者：XXX 日期：2003-10-15
- * 修 改 者：XXX 日期：
- * 版 本：1.00
- ***********************************************************************/
- unsigned char CheckSum(unsigned char *ptr,unsigned char leng)
- {
- unsigned char i;
- unsigned char bytetemp=0;
-
- for(i=0;i<leng;i++)
- {
- bytetemp-=ptr[i];
- }
- return(bytetemp);
- }
-
-
- /******************* (C) COPYRIGHT 2017 LECOOAI *****END OF FILE****/
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