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/***************************************************************************
ibdev.c
-------------------
begin : Tues Feb 12 2002
copyright : (C) 2002 by Frank Mori Hess
email : fmhess@users.sourceforge.net
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "ib_internal.h"
#include <stdlib.h>
#if 0
static int is_device_addr(int minor, int pad, int sad)
{
ibBoard_t *board;
unsigned int board_pad;
int board_sad;
board = &ibBoard[ minor ];
if (query_pad(board, &board_pad) < 0) {
fprintf(stderr, "failed to query pad\n");
return -1;
}
if (query_sad(board, &board_sad) < 0) {
fprintf(stderr, "failed to query sad\n");
return -1;
}
if (gpib_address_equal(board_pad, board_sad, pad, sad) == 0) {
return 1;
}
return 0;
}
#endif
int ibdev(int minor, int pad, int sad, int timo, int eot, int eosmode)
{
int retval,ud;
ibConf_t new_conf;
int no_show_error = getenv("IB_NO_ERROR") ? 1 : 0;
ibBoard_t *board;
unsigned board_pad;
int my_sad, board_sad;
if (minor < 0 || minor >= GPIB_MAX_NUM_BOARDS) {
if (!no_show_error)
fprintf(stderr,"ibdev: invalid minor%d\n", minor);
setIberr(EARG);
sync_globals();
return -1;
}
retval = ibParseConfigFile(minor);
if (retval < 0) {
if (errno) {
setIberr(EDVR);
setIbcnt(errno);
} else {
setIberr(ECNF);
}
setIbsta(ERR);
sync_globals();
return -1;
}
/* Check for valid address arguments */
if (pad < 0 || pad > gpib_addr_max) {
if (!no_show_error)
fprintf(stderr,"ibdev: invalid pad %d, expected 0 <= pad <= 30\n", pad);
setIberr(EARG);
sync_globals();
return -1;
}
if (!sad) /* 0 means no address */
my_sad = -1;
else
my_sad = sad - sad_offset;
if (my_sad < -1 || my_sad > gpib_sad_max) {
if (!no_show_error)
fprintf(stderr,"ibdev: invalid sad 0x%02x, expected 0, or 0x60 <= sad <= 0x7f\n", sad);
setIberr(EARG);
sync_globals();
return -1;
}
init_ibconf(&new_conf);
new_conf.settings.pad = pad;
new_conf.settings.sad = my_sad; /* device address */
new_conf.settings.board = minor; /* board number */
new_conf.settings.eos = eosmode & 0xff; /* local eos modes */
new_conf.settings.eos_flags = eosmode & 0xff00;
new_conf.settings.usec_timeout = timeout_to_usec(timo);
if (eot)
new_conf.settings.send_eoi = 1;
else
new_conf.settings.send_eoi = 0;
new_conf.defaults = new_conf.settings;
new_conf.is_interface = 0;
new_conf.error_msg_disable = no_show_error;
ud = my_ibdev(new_conf);
if (ud < 0)
return -1;
// check for address conflicts with board addresses
board = interfaceBoard(&new_conf);
if (query_pad(board, &board_pad) < 0) {
goto ibdev_err;
}
if (query_sad(board, &board_sad) < 0) {
goto ibdev_err;
}
if (board_pad == pad) {
fprintf(stderr,"ibdev: address conflict with board pad\n");
setIberr(EARG);
goto ibdev_err;
}
return ud;
ibdev_err:
retval = close_gpib_handle(&new_conf);
if (retval < 0) {
if (!no_show_error)
fprintf(stderr, "ibdev: cleanup failed\n");
sync_globals();
return -1;
}
release_descriptor(ud);
sync_globals();
return -1;
}
int my_ibdev(ibConf_t new_conf)
{
int ud;
ibConf_t *conf;
ud = insert_descriptor(new_conf, -1);
if (ud < 0) {
if (!new_conf.error_msg_disable)
fprintf(stderr, "libgpib: ibdev failed to get descriptor\n");
setIbsta(ERR);
return -1;
}
conf = enter_library(ud);
if (!conf) {
exit_library(ud, 1);
release_descriptor(ud);
return -1;
}
// XXX do local lockout if appropriate
exit_library(ud, 0);
return ud;
}
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