Measurement-computing Personal488 rev.3.0 For DOS & Windows 3.Xi Uživatelský manuál stáhnout pdf (Strana 206)

II. SOFTWARE GUIDES - 9. Driver488/SUB 9L. Command Reference

Personal488 User’s Manual, Rev. 3.0 II-191

Status Structure

Structure used by

Status

typedef struct { /* These flags are TRUE (non-zero) if: */

bool SC; /* we are System Controller */

bool CA; /* we are Active Controller */

char Primaddr; /* our primary bus address */

char Secaddr; /* our secondary bus address */

bool SRQ;

/* SRQ is active (CA) or rsv is active (-CA) */

bool addrChange; /* we detected an address status change */

bool talker; /* we are an active talker */

bool listener; /* we are an active listener */

bool triggered; /* we have been triggered */

bool cleared; /* we have been cleared */

bool transfer; /* we have a transfer in progress */

bool byteIn; /* we have an input byte to read */

bool byteOut; /* we may be able to output a byte */

} IeeeStatusT;

typedef IeeeStatusT*IeeeStatusPT;

Miscellaneous Constants

The following constants are defined and are required as parameters in several functions:

IN OUT ON OFF FILL_OFF FILL_ERROR

9L. Command Reference

For Driver488/SUB, W31, W95, & WNT

To obtain a detailed description of the command references for Driver488/SUB and Driver488/W31,

turn to Section III in this manual entitled “Command References.” The commands for Driver488/W95

and Driver488/WNT are provided as guides, pending current software revisions. Refer to your

operating system header file for the latest available information specific to your application. The

commands are presented in alphabetical order for ease of use.

Completion Code Bit Masks

Structure used by all the

Enter

and

Output

functions:

typedef enum {

ccCount = 0x0001

/* specified number of characters transferred */

ccBuffer = 0x0002 /* buffer count exhausted */

ccTerm = 0x0004 /* terminator character(s) detected */

ccEnd = 0x0008 /* End signal (EOI) detected */

ccChange = 0x0010 /* unexpected change of I/O signals */

ccStop = 0x0020 /* transfer terminated by program cmd */

ccDone = 0x4000 /* transfer has terminated */

ccError = 0x8000 /* details in error code field */

} CompCodeT;

typedef CompCodeT far *CompCodePT;

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