[libsigrok.git] / hardware / conrad-digi-35-cpu / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
 *
 * 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @file
 * <em>Conrad DIGI 35 CPU</em> power supply driver
 * @internal
 */

#include "protocol.h"

/**
 * Send command with parameter.
 *
 * @param[in] cmd Command
 * @param[in] param Parameter (0..999, depending on command).
 *
 * @retval SR_OK Success.
 * @retval SR_ERR_ARG Invalid argument.
 * @retval SR_ERR Error.
 */
SR_PRIV int send_msg1(const struct sr_dev_inst *sdi, char cmd, int param)
{
	struct sr_serial_dev_inst *serial;
	char buf[5];

	if (!sdi || !(serial = sdi->conn))
		return SR_ERR_ARG;

	snprintf(buf, sizeof(buf), "%c%03d", cmd, param);
	buf[4] = '\r';

	sr_spew("send_msg1(): %c%c%c%c\\r", buf[0], buf[1], buf[2], buf[3]);

	if (serial_write(serial, buf, sizeof(buf)) == -1) {
		sr_err("Write error for cmd=%c: %d %s", cmd, errno, strerror(errno));
		return SR_ERR;
	}

	/*
	 * Wait 50ms to ensure that the device does not swallow any of the
	 * following commands.
	 */
	g_usleep(50000);

	return SR_OK;
}
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	/**
	21	* @file
	22	* <em>Conrad DIGI 35 CPU</em> power supply driver
	23	* @internal
	24	*/
	25
	26	#include "protocol.h"
	27
	28	/**
	29	* Send command with parameter.
	30	*
	31	* @param[in] cmd Command
	32	* @param[in] param Parameter (0..999, depending on command).
	33	*
	34	* @retval SR_OK Success.
	35	* @retval SR_ERR_ARG Invalid argument.
	36	* @retval SR_ERR Error.
	37	*/
	38	SR_PRIV int send_msg1(const struct sr_dev_inst *sdi, char cmd, int param)
	39	{
	40	struct sr_serial_dev_inst *serial;
	41	char buf[5];
	42
	43	if (!sdi \|\| !(serial = sdi->conn))
	44	return SR_ERR_ARG;
	45
	46	snprintf(buf, sizeof(buf), "%c%03d", cmd, param);
	47	buf[4] = '\r';
	48
	49	sr_spew("send_msg1(): %c%c%c%c\\r", buf[0], buf[1], buf[2], buf[3]);
	50
	51	if (serial_write(serial, buf, sizeof(buf)) == -1) {
	52	sr_err("Write error for cmd=%c: %d %s", cmd, errno, strerror(errno));
	53	return SR_ERR;
	54	}
	55
	56	/*
	57	* Wait 50ms to ensure that the device does not swallow any of the
	58	* following commands.
	59	*/
	60	g_usleep(50000);
	61
	62	return SR_OK;
	63	}