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/* |
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* include needed system headers |
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11/9/2005 modified by david fedele to not create file_temp |
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22/11/2005 modified by david fedele to implement crc control */ |
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|
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#include <stdio.h> /* include standard i/o library */ |
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#include <stdlib.h> /* include standard library */ |
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#include <string.h> /* include string library */ |
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#include <ctype.h> /* include conversion library */ |
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#include <unistd.h> /* include unix standard library */ |
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#include <sys/types.h> /* */ |
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#include <sys/stat.h> /* */ |
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#include <fcntl.h> /* */ |
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#include <errno.h> /* error simbol definitions */ |
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#include <time.h> /* system time definitions */ |
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#include <math.h> /* math library */ |
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|
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#define MAXBUFFLEN 0x172c8 //0x12a50 |
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#define HEADERLEN 8 |
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/* find cpu header */ |
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/* starting path --> 0xFAFEDE */ |
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|
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/***************************************************** */ |
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/* 22/11/2005 modified by david fedele */ |
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unsigned char crc16(unsigned char old,unsigned char data); |
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/* ***************************************************** */ |
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void findcpuheader_(int *error, int *fd, int *pkt, unsigned long *pkt_counter, |
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unsigned long *obtt, char* buffer,int *length) |
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|
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{ |
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|
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int i; |
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|
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int nread,nwrite; |
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unsigned short cpu_header[HEADERLEN]; |
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unsigned short temp; |
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|
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int header_flag; |
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unsigned long int start; |
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unsigned char pkt_type; |
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unsigned long int counter,counter_last=0; |
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unsigned long int obt; |
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unsigned long int pkt_len; |
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char cpucrc; |
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|
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char buff[MAXBUFFLEN]; |
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|
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int fd_out; |
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char *ptemp; |
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|
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/***************************************************** */ |
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/* 22/11/2005 modified by david fedele */ |
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char icc; |
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/****************************************************** */ |
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|
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do{ |
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|
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/* search for 0xFAFEDE*/ |
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do { |
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*error=0; |
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nread=read(*fd, cpu_header, 2*HEADERLEN); |
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// printf("%d \n",2*HEADERLEN); |
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if(nread == 0) { |
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// printf("findcpuheader (1): Unexpected end of file %d at %d \n",*fd,nread); |
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*error=1; |
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return ; |
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} |
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if(nread != 2*HEADERLEN) { |
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// printf("findcpuheader (1): Error on reading: bytes read -> nread = %d instead of %d\n",nread,2*HEADERLEN); |
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*error=-1; |
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return ; |
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} |
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/*** corrects byte ***/ //endianess... |
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for(i=0;i<HEADERLEN;i++){ |
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temp = cpu_header[i]; |
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cpu_header[i] = ( (temp&0x00ff) << 8 ) | ( (temp&0xff00) >> 8 ); |
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}; |
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|
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|
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header_flag = 1; |
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|
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start = (cpu_header[0]<<8)|((cpu_header[1]&0xff00)>>8); |
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if(start != 0xfafede)header_flag = 0; |
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pkt_type = (unsigned char)(cpu_header[1]&0x00ff); |
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if((unsigned char)((cpu_header[2]&0xff00)>>8) != pkt_type)header_flag = 0; |
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counter = ((cpu_header[2]&0x00ff)<<16) |
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|cpu_header[3]; |
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obt = ((cpu_header[4]&0xffff)<<16) | (cpu_header[5]&0xffff); |
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pkt_len = (cpu_header[6]<<8) | ((cpu_header[7]&0xff00)>>8); |
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cpucrc = cpu_header[7]&0x00ff; |
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|
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// ************************************ |
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lseek(*fd, -(2*HEADERLEN-1), SEEK_CUR); |
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// SEEK_CUR ---> from current position |
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// ************************************ |
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} |
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while (!header_flag); |
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|
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/***************************************************** */ |
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/* 22/11/2005 modified by david fedele */ |
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icc=0; |
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for (i =0; i < 8 ; i++){ |
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icc=crc16(icc,cpu_header[i]); |
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/* temp=(cpu_header[i]&0x00ff); */ |
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/* icc = crc8_8(icc, temp); */ |
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/* temp=(cpu_header[i]&0xff00); */ |
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/* icc = crc8_8(icc, temp); */ |
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} |
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/* if(icc==cpucrc) */ |
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/* printf("cpucrc=%hx\ticc=%hx\n\n",cpucrc,icc); */ |
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/****************************************************** */ |
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|
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|
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counter_last = counter; |
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/* print header content */ |
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/* if( (pkt_type == 0x20) */ |
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/* || (pkt_type == 0x07) */ |
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/* || (pkt_type == 0x21) */ |
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/* || (pkt_type == 0x12) */ |
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/* || (pkt_type == 0x83) */ |
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/* || (pkt_type == 0x13)){ */ |
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/* printf("\n********************************\n"); */ |
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/* printf("* >>>> CPU HEADER <<<< *\n"); */ |
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/* printf("********************************\n"); */ |
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/* printf(" Packet type \t 0x%x \n",pkt_type); */ |
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/* printf(" Counter \t %u \n",counter); */ |
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/* printf(" On-board time \t 0x%x \n",obt); */ |
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/* printf(" Packet length (byte)\t %d \n",pkt_len); */ |
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/* printf("********************************\n"); */ |
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/* }; */ |
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|
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// ************************************** |
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lseek(*fd, (2*HEADERLEN-1), SEEK_CUR); |
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// SEEK_CUR ---> from current position |
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// ************************************** |
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|
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}while((pkt_type != 0x12)&& |
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(pkt_type != 0x13)&& |
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(pkt_type != 0x10)&& |
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(pkt_type != 0x30)&& |
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(pkt_type != 0x20)&& // RUNHEADER PACKET |
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(pkt_type != 0x21)&& // RUNHEADER PACKET |
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(pkt_type != 0x83)); |
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|
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/* come here when a tracker packet is fownd: */ |
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/* 0x12 --> calibration board 0 */ |
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/* 0x13 --> calibration board 1 */ |
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/* 0x10 --> event */ |
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/* 0x30 --> full event for calib special */ |
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/* 0x20 --> runheader packet */ |
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/* 0x83 --> tracker ALARM (control register) */ |
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|
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nread = read(*fd, buff, pkt_len); |
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if(nread == 0) { |
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printf("findcpuheader: Unexpected end of file %d at %d \n",*fd,nread); |
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*error=1; |
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return ; |
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} |
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if(nread != pkt_len) { |
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printf("findcpuheader: Error on reading: bytes read -> nread = %i instead of %i \n",(int)nread,(int)pkt_len); |
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*error=-1; |
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return ; |
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} |
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// for(i=0;i<12;i++)printf("- %hhx \n",buff[i]); |
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|
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/* //**************************************************** */ |
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/* //ccccc 11/9/2005 modified by david fedele */ |
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/* fd_out = creat("bin-aux/packet.dat",0666); */ |
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/* nwrite = write(fd_out, buff, nread); */ |
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/* if(nwrite != nread) { */ |
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/* printf("findcpuheader: Error on writing: bytes written -> nwrite = %d \n",nwrite); */ |
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/* // *error=-1; */ |
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/* return ; */ |
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/* } */ |
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/* close(fd_out); */ |
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/* ***************************************************** */ |
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|
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ptemp=buffer; |
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for(i =0; i< nread; i++){ |
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*ptemp=buff[i]; |
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ptemp++; |
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}; |
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*length = nread; |
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/***************************************************** */ |
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/* 22/11/2005 modified by david fedele */ |
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/* icc=0; */ |
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/* for (i =0; i < HEADERLEN; i++){ */ |
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/* temp=(buff[i]&0xff00); */ |
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/* icc = crc8_8(icc, temp); */ |
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/* temp=(buff[i]&0x00ff); */ |
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/* icc = crc8_8(icc, temp); */ |
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/* } */ |
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/* if(icc==cpucrc) */ |
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/* printf("cpucrc=%hx\ticc=%hx\n\n",cpucrc,icc); */ |
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|
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/****************************************************** */ |
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*pkt = (short int)pkt_type; |
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*pkt_counter = counter; |
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*obtt = obt; |
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return; |
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} |
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