Ciprico Rimfire 3880, User Manual

Page: 82 / 230

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;