mod_judge.c

dsp320lf2407上的相关程序文件

#include    "f2407_c.h" 

extern unsigned int ok;


static unsigned char auchCRCHi[] = {

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 

0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 

0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 

0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 

0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 

0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 

0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 

0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 

0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 

0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 

0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 

0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 

0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 

0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 

0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 

0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 

0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 

0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 

0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 

0x80, 0x41, 0x00, 0xC1, 0x81, 0x40

} ; 

/* CRC低位字节值表*/

static char auchCRCLo[] = {

0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 

0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 

0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 

0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 

0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 

0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 

0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 

0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 

0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 

0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 

0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 

0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 

0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 

0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 

0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 

0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 

0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 

0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 

0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 

0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 

0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 

0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 

0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 

0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 

0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 

0x43, 0x83, 0x41, 0x81, 0x80, 0x40

} ;





unsigned char crc_buf[20];
unsigned int step=0,crc_len=0,pre_fun=0;
extern unsigned int mod_fun,start_addr_h,start_addr_l,n_data_h,n_data_l;
extern data_rec[20];
extern unsigned int i_d;


unsigned short CRC16(unsigned char *puchMsg, unsigned short usDataLen); 

void reset_crc(void)
{
	unsigned int i;
	step=0;
	for(i=0;i<20;i++)crc_buf[i]=0;
	crc_len=0;
	i_d=0;
}
	

void rec_judge(void)
{
	unsigned int i;
	switch(step)
	{
		case 0:	
		{	
			if((data_rec[i_d]&0x00ff)==0x0001)
			{
				step=1;	/*device addr*/
				crc_buf[0]=0x01;
				crc_len=1;
			}
			else	reset_crc(); 
            break;
		}
		
		
		
		case 1:
		{
			switch(data_rec[i_d]&0x00ff)
			{
				case 0x0003: 		 /*read holding coil*/
				{
					crc_buf[1]=0x03;
					pre_fun=3;
					break;
				}
				case 0x0006:  			/*Preset Single Register*/
				{
					crc_buf[1]=0x06;
					pre_fun=6;
					break;
				}
				case 0x0001:  			/*Read Coil Status*/
				{
					crc_buf[1]=0x01;
					pre_fun=1;
					break;
				}
				case 0x0002: 			/*Read Input Status*/
				{
					crc_buf[1]=0x02;
					pre_fun=2; 
					break;
				}
				case 0x0004: 			/*Read Input Registers*/
				{
					crc_buf[1]=0x04;
					pre_fun=4;
					break;
				}
				case 0x0005: 			/*Force Single Coil*/
				{
					crc_buf[1]=0x05;
					pre_fun=5;
					break;
				}
				default:
				{
					reset_crc();
				}
			}	
			crc_len=2;
			step=2;
			break;
		}
		
		
		case 2:
		{
			start_addr_h=(data_rec[i_d]&0x00ff);
			crc_buf[2]=start_addr_h;
			crc_len=3;
			step=21;
			break;
		}
		case 21:
		{
			start_addr_l=(data_rec[i_d]&0x00ff);
			crc_buf[3]=start_addr_l;
			crc_len=4;
			step=22;
			break;
		}
		case 22:
		{
			n_data_h=(data_rec[i_d]&0x00ff);
			crc_buf[4]=n_data_h;
			crc_len=5;
			step=23;
			break;
		}
		case 23:
		{
			n_data_l=(data_rec[i_d]&0x00ff);
			crc_buf[5]=n_data_l;
			crc_len=6;
			step=24;
			break;
		}
		case 24:
		{
			if(data_rec[i_d]==CRC16(crc_buf,6)/0x0100)
			{
				step=25;
			}
			else reset_crc();
			break;
		}
		case 25:
		{
			if(data_rec[i_d]==CRC16(crc_buf,6)%0x0100)
			{
				ok=1;
				switch(pre_fun)
				{
					case 1:{mod_fun=1;break;}
					case 2:{mod_fun=2;break;}
					case 3:{mod_fun=3;break;}
					case 4:{mod_fun=4;break;}
					case 5:{mod_fun=5;break;}
					case 6:{mod_fun=6;break;}
				}	
			}
			reset_crc();
			
			
			transaction(); 
		/*	*SCICTL2=0x0001; 		/*enable tx interrupt*/	
		*SCITXBUF='';	
			break;
		}
	}
}









unsigned short CRC16(unsigned char *puchMsg, unsigned short usDataLen)
{
	
    unsigned uIndex ; /* CRC循环中的索引 */ 
    unsigned char uchCRCHi = 0xFF ; /* 高CRC字节初始化 */
	unsigned char uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */
	while (usDataLen--) /* 传输消息缓冲区 */
	{
		uIndex = uchCRCHi ^ *puchMsg++ ; /* 计算CRC */
		uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
		uchCRCLo = auchCRCLo[uIndex] ;
	}
return (uchCRCHi << 8 | uchCRCLo) ;
}