Ciprico Rimfire 3880 User Manual download pdf (Page 82)

21020285 D User’s Guide

Chapter 4 Command Operation

Page 4 - 24 Example ‘C’ Routines for Command List

BYTE cdb[12]; /* cdb - Command Descriptor Block/

} parameter_block;

/* status_block - a structure used to hold the status information that is returned from

* the adapter.

typedef struct

{

DWORD sb_ident; /* sb_ident - status block identifier. */

BYTE sb_res; /* sb_res - reserved field. */

BYTE sb_status; /* sb_status - command SCSI status type. */

BYTE sb_error; /* sb_error - error code number. */

BYTE sb_flag; /* sb_flag - command completion flag. */

/* possible values for sb_flag */

#define ST_CDONE 0x80 /*command complete. */

#define ST_ERROR 0x40 /*command error. */

#define ST_RETRY 0x20 /*retry required. */

#define ST_TRUNCATED 0x10 /* data transfer truncated. */

#define ST_CONTINUED 0x04 /* block continued from previous. */

BYTE sb_info[8] /* sb_info[8] SCSI request sense info. */

} status_block;

/* clist - a Command List structure

typedef struct

{

DWORD pbin; /* parameter block IN pointer. */

DWORD pbout; /* parameter block OUT pointer. */

DWORD sbin; /* status block IN pointer. */

DWORD sbout; /* status block OUT pointer. */

DWORD number_pbs; /* number of parameter blocks. */

DWORD number_sbs; /* number of status blocks. */

DWORD reserved[2]; /* two RESERVED fields. */

parameter_blockpblist[NPB];/*Parameter Block area. */

status_block sblist[NSB};/* Status Block area. */

} command_list;

/* Functions: */

/*_______________________________________________________________

* put_parameter_block - A function to add a command to the Command List

*______________________________________________________________*/

void put_parameter_block(pb,clist)

parameter_block pb;

command_list *clist;

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Ciprico Rimfire 3880 User Manual Page 82