PHOBOS DAQ Documentation

 

PHOBOS DAQ Documentation.. 1

Generic event format. 1

 

Generic event format. 31023

Valid for files written with PDAQ04.

 

The following is an example of the event generated by vmesparc:test_rout and received by usp:test_fpdplib.

 

[0]test_fpdplib.c: Event received 2979 size 19000

beginning of event

0000:be019000 28000000 b0ef0b05 ec5e48da 000f4240 0000000c 00020d9c 35520000

0020:00000000 00100000 00000000 ffffffff fffffffe fffffffd fffffffc fffffffb

end of event

0000:ffff9c12 ffff9c11 ffff9c10 ffff9c0f ee000010 10009001 e0ef0b05 1eef9b14

 

 [0]test_fpdplib.c: Event received 3276 size 19000

beginning of event

0000:be019000 28000000 b0ef0b05 11d1c78d 000f4240 0000000c 00020ec5 37221000

0020:00000000 00100000 00000000 00000001 00000002 00000003 00000004 00000005

end of event

0000:000063ee 000063ef 000063f0 000063f1 ee000010 10009001 e0ef0b05 1eef9b14

Fig. 1  Event received on SUN host.

 

1746164 000063ee 000063ef 000063f0 000063f1

1746204 ee000010 10019000 e0ef0b05 1eee9b15

1746224 be019000 28000000 b0ef0b05 d908054e

1746244 000f4240 00000000 00000004 00064000

1746264 00000000 00100000 00000000 ffffffff

or

0016740 16 9c ff ff 15 9c ff ff 14 9c ff ff 13 9c ff ff

0016760 12 9c ff ff 11 9c ff ff 10 9c ff ff 0f 9c ff ff

0017000 10 00 00 ee 01 90 00 10 05 0b ef e0 14 9b ef 1e

0017020 00 90 01 be 00 00 00 28 05 0b ef b0 6b bb 98 3a

0017040 40 42 0f 00 00 00 00 00 2f 12 00 00 00 70 69 1c

0017060 00 00 00 00 00 00 10 00 00 00 00 00 01 00 00 00

0017100 02 00 00 00 03 00 00 00 04 00 00 00 05 00 00 00

 

Fig. 2 Data stream dump at phss (Linux on Intel Xeon)

 

The up-to-date header file used in data writing can be found here:

http://www4.rcf.bnl.gov/~phobos/cgi-bin/cvsweb.cgi/~checkout~/DAQ/dqin/include/DataBlock.h?rev=1.4&content-type=text/plain

 

The header file for reading on Linux:

http://www4.rcf.bnl.gov/~phobos/cgi-bin/cvsweb.cgi/~checkout~/Phat/phatdat/inc/TPhDataBlock.h?rev=1.8&content-type=text/plain