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/***************************************************************************
lib/ibSic.c
-------------------
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"
int assert_ifc(ibBoard_t *board, unsigned int usec_duration)
{
int retval;
retval = ioctl(board->fileno, IBSIC, &usec_duration);
if (retval < 0) {
setIberr(EDVR);
setIbcnt(errno);
}
return retval;
}
int internal_ibsic(ibConf_t *conf)
{
ibBoard_t *board;
int retval;
if (conf->is_interface == 0) {
setIberr(EARG);
return -1;
}
board = interfaceBoard(conf);
retval = is_system_controller(board);
if (retval <= 0) {
if (retval == 0)
setIberr(ESAC);
return -1;
}
return assert_ifc(board, 100);
}
int ibsic(int ud)
{
ibConf_t *conf;
int retval;
conf = enter_library(ud);
if (!conf)
return exit_library(ud, 1);
retval = internal_ibsic(conf);
if (retval < 0)
return exit_library(ud, 1);
return exit_library(ud, 0);
}
void SendIFC(int boardID)
{
ibsic(boardID);
}
int request_system_control(ibBoard_t *board, int request_control)
{
int rsc_cmd;
int retval;
rsc_cmd = request_control != 0;
retval = ioctl(board->fileno, IBRSC, &rsc_cmd);
if (retval < 0) {
fprintf(stderr, "libgpib: IBRSC ioctl failed\n");
setIberr(EDVR);
setIbcnt(errno);
return retval;
}
board->is_system_controller = request_control != 0;
if (request_control && board->set_ren_on_sc) {
retval = remote_enable(board, 1);
if (retval < 0) {
fprintf(stderr, "libgpib: IBRSC remote enable failed\n");
setIberr(EDVR);
setIbcnt(errno);
return retval;
}
}
return 0;
}
int internal_ibrsc(ibConf_t *conf, int request_control)
{
int retval;
if (conf->is_interface == 0) {
setIberr(EARG);
return -1;
}
retval = request_system_control(interfaceBoard(conf), request_control);
if (retval < 0)
return retval;
return 0;
}
int ibrsc(int ud, int request_control)
{
ibConf_t *conf;
int retval;
conf = enter_library(ud);
if (conf == NULL)
return exit_library(ud, 1);
retval = internal_ibrsc(conf, request_control);
if (retval < 0)
return exit_library(ud, 1);
return exit_library(ud, 0);
}
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