[sane-devel] scsi scan command

[m. allan noah]

did this help?

On 10/24/07, m. allan noah <kitno455 at gmail.com> wrote:
> On 10/24/07, jazz_johnson at verizon.net <jazz_johnson at verizon.net> wrote:
> > Where, according to the MANUAL,
> >
> > "the Transfer Length is the
> > byte-length of the Window List transferred by the initiator in the
> > DATA OUTPUT PHASE, and the Window List is a list of WIndow Identifiers
> > created by the SET WINDOW command.
> > Only one Window is supported with regard to Scan command. Therefore,
> > 0 or 1 is used for Window Identifier, and 1 or 2 for Transfer Length."
>
> that statement actually contradicts itself.
>
> > Then in my trigger_scan command, based on ibm.c,
> > I have :
> >
> > typedef struct {
> >   SANE_Byte  opcode;   /* 0x1B */
> >   SANE_Byte   B1;           /* LUN : reserved */
> >   SANE_Byte   pc;            /* page code */
> >   SANE_Byte   B2;           /* reserved */
> >   SANE_Byte   len            /* transfer length */
> >   SANE_Byte   control;   /* VU : reserved : Flag : Link */
> > }START_SCAN;
> >
> > trigger_scan (HS2P_Scanner *s)
> > {
> >   static START_SCAN  cmd;
> >   static SANE_Byte      window_id_list[2] = { 0, 1} ;
> >   SANE_Status             status;
> >   size_t                           wl_size = sizeof(window_id_list);
> >
> >   memset (&cmd, 0, sizeof (cmd));                /* CLEAR cmd */
> >   cmd.opcode = HS2P_SCSI_START_SCAN; /* 1BH */
> >   cmd.len = (s->val[OPT_DUPLEX].w == SANE_TRUE)? 2 : 1 ;
> >
> >   status = sanei_scsi_cmd (s->fd, &cmd, sizeof (cmd), &window_id_list[0],
> > &wl_size);
> >   /* I've also tried the following line, but also get ILLEGAL REQUEST
> >   status = sanei_scsi_cmd (s->fd, &cmd, sizeof (cmd), NULL, NULL);
> >   */
> >   return (status);
> > }
>
> so you are telling it in the command that you are going to transfer 1
> or 2 bytes, but you always transfer 2 (wl_size)?
>
> allan
>
> --
> "The truth is an offense, but not a sin"
>


-- 
"The truth is an offense, but not a sin"