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a question about opening a serial port fax device as a file
- From: Indra Antonius Simalango <indra at vlsi dot itb dot ac dot id>
- To: <ecos-discuss at ecos dot sourceware dot org>
- Date: Wed, 20 Jul 2005 19:15:36 +0700 (WIT)
- Subject: [ECOS] a question about opening a serial port fax device as a file
deal all,
Below are my quote snippet. It would open a serial fax device as a TFILE.
Returns 0 if OK, 1 if busy, 2 on error.
-------------------------------------------------------------------------
...
#define FAXFILE "/dev/ser1"
typedef struct tfilestruct {
int fd ;
unsigned char *ip, *iq ;
unsigned char ibuf [ IBUFSIZE ] ;
unsigned char *ibitorder, *obitorder ;
int bytes, pad, lines ;
int hwfc ;
time_t start ;
long mstart ;
int rd_state ;
} TFILE ;
int ttyopen ( TFILE *f, char *fname, int reverse, int hwfc )
{
int flags, err=0 ;
tinit ( f, open ( fname, O_RDWR | O_NONBLOCK | O_NOCTTY ), reverse, hwfc
) ;
if ( f->fd < 0 ) {
if ( errno == EBUSY ) {
err = 1 ;
} else {
err = msg ( "ES2can't open serial port %s:", fname ) ;
}
}
...
--------------------------------------------------------------------------
I set fname = FAXFILE
I've done this by posix-eCos programming.This file has successfully
compiled and linked. But when it runs, it gives an error return :
:17:20 Error : can't open serial port /dev/ser1: No such entity
I built my eCos on PC-i386 platform. I've also changed FAXFILE to
/dev/ser0, /dev/ttyS0, but still encountered the same error. Did I miss
something here?
--
regards,
IndrA on 18:49, Jul 20
http://ic.ee.itb.ac.id/~antonius
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