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

Andy

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

File layout is probably: <Master Header><1000 2-byte INT><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