Kubke Lab:Research/ABR/Notebook/2013/11/05

From OpenWetWare

Jump to: navigation, search
Hearing development in barn owls Main project page
Previous entry      Next entry

Contents


General Entries

  • Insert content here.

Personal Entries

Fabiana

  • trying to open the actual .ABR files - getting nowhere. Noticed the log files that were extracted dont have the info I need and need to see what info is in the actual data files.

Andy says it is an intel file - over skype trying to figure out the structure so we can read it - extracting info from abr.h and abr_4_mac.c

According to andy need to Read the first 1128 bytes then read the next 1000 2-byte int skip 52 read next 1000 points, and so on

Andy

Following file is from the ABR.H header file that was used for the original files.

File layout is probably: <Master_Header><Sub_Structure><1000 2-byte INT><Sub_Structure><1000 2-byte INT> ...

This structure needs to be confirmed.



typedef struct

   {
   short freq;	/* frequency in Hz */
   short amp;	/* amplitude in D/A units */
   short dur;		/* duration in clock ticks */
   short rise_fall;	/* rise_fall in clock ticks */
   } SIGNAL; // 8 bytes

typedef struct

   {
   SIGNAL carrier;
   SIGNAL envelope;
   } STIMULUS;

typedef struct

   {
   short left_delay;	/* microseconds to left  onset */
   short right_delay;	/* microseconds to right onset */
   short rep_shorterval;	/* interval in millseconds */
   } TIMING; //6 bytes

typedef struct

   {
   short clock;	    /* clock frequency in kHz */
   short max_size;   /* maximum size of each array */
   short channels;   /* 1 for carrier only, 2 for carrier & envelope */
   } DA_INFO; //6 bytes

typedef struct

   {
   short clock;	    /* in kHz */
   short size;	    /* number of elements (per channel) */
   short channels;   /* number of channels */
   short avg_reps;   /* number of reps making up the average */
   } AD_INFO; //8 bytes

typedef struct

   {
   char date[12];
   char time[12];
   char owl_id[12];
   char exp_id[12];
   char comments[80];
   short depth;
   short version;
   char side;
   short num_chan;
   short num_tests;
   short gain;
   char extra_room[1024-(12+12+12+12+80+2+2+1+2+2+2)];/* Add two more to correct CHAR */
   //    char extra_room[1024-(12+12+12+12+80+2+2+1)];/* Add two more to correct CHAR */
   } HEADER_INFO,  EXPERIMENT_HEADER; // Bytes 1024

typedef struct /**** THE MASTER STRUCTURE ****/

   {
   HEADER_INFO header; //1024
   STIMULUS left;      //  16
   STIMULUS right;     //  16
   TIMING delay;       //   6
   DA_INFO output;     //   6
   AD_INFO input;      //   8
   } EXPERIMENT;   // 1076 bytes


typedef struct /**** SUB STRUCTURE ****/

   {
   STIMULUS left;      //    16
   STIMULUS right;     //    16
   TIMING delay;       //     6
   DA_INFO output;     //     6
   AD_INFO input;      //     8
   } EXPERIMENT_INFO; // 52 bytes

Oris

  • Enter content here


Personal tools