Fluke 2635A user manual Appendices

Appendices	F
Memory Card File Formats

Now that the configuration has been processed and the number of valid channels has been determined, the scan data can be processed.

/* Measurements are stored in scan records of variable size.

**This C structure is the decoded version of a scan record,

**and is of fixed size (unused measurement values are not set).

*/

struct scan_record {

/* Timestamp */ unsigned char bcd_hours; unsigned char bcd_minutes; unsigned char bcd_seconds; unsigned char bcd_month; unsigned char bcd_day; unsigned char bcd_year;

/* Digital (alarm) outputs */ unsigned char dout;

/* Digital input/outputs */ unsigned char dio;

/* Totalizer value */ float total;

/* Measurement per channel */ float meas[21];

} scan;

/*

-* convert_scan_record(): Convert a scan record into usable data

**

**In each data file, after the 730 bytes of configuration data, an

**array of scan records may be found (it is possible for data files

**to have no scan data). This routine converts a single scan record

**and places it in the given destination buffer.

**

**Note that convert_config() must be called before this routine!

**Inputs:

**	hydra	File configuration data.
**	max_index	number of channels in scan record and
**	index_to_chan	the table of non-off channels
**	file_data	A single scan record from the same data file.
**		that was last processed by convert_config().
**		Note that this routine assumes that the
**		number of bytes in this buffer is exactly the
**		number of bytes per scan record.
**	scan	Pointer to destination scan record buffer.
**
** Outputs:
**	scan	Set to converted version of scan record.
*/

void

convert_scan_record(unsigned char * file_data, struct scan_record * scan)

{

int index; int ch;

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