/* *****************************************************************************
 * misc/setlink.c -- set link settings.
 * Copyright (C) 2016-2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
 *
 * This file is part of libp7.
 * libp7 is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 3.0 of the License,
 * or (at your option) any later version.
 *
 * libp7 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with libp7; if not, see <http://www.gnu.org/licenses/>.
 * ************************************************************************** */
#include <libp7/internals.h>
#include <libp7/internals/sleep.h>

/**
 *	p7_setlink:
 *	Set link settings.
 *
 *	@arg	handle		the libp7 handle.
 *	@arg	baudrate	the speed.
 *	@arg	parity		the parity.
 *	@arg	stopbits	the number stop bits.
 *	@return				the error code.
 */

int p7_setlink(p7_handle_t *handle, int baudrate, int parity, int stopbits)
{
	int err;

	/* make checks */
	chk_handle(handle);
	chk_active(handle);

	/* send command */
	log_info("sending command");
	if ((err = p7_send_cmdsys_setlink(handle, baudrate, parity, stopbits))) {
		log_fatal("could not set command/receive answer");
		return (err);
	} else if (response.type != p7_pt_ack) {
		err = p7_error_unknown;
		goto end;
	}

	/* set communication properties */
	p7_setcomm(handle->_stream, baudrate, parity, stopbits);

end:
	/* wait for the calculator to set its serial interface, and we're done */
	p7_sleep(100);
	return (0);
}