[libsigrok.git] / src / scpi / scpi_vxi.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
 *
 * Inspired by the VXI11 Ethernet Protocol for Linux:
 * http://optics.eee.nottingham.ac.uk/vxi11/
 *
 * 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/>.
 */

#include <rpc/rpc.h>
#include <string.h>
#include "vxi.h"
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"

#define LOG_PREFIX "scpi_vxi"
#define VXI_DEFAULT_TIMEOUT_MS 2000

struct scpi_vxi {
	char *address;
	char *instrument;
	CLIENT *client;
	Device_Link link;
	unsigned int max_send_size;
	unsigned int read_complete;
};

static int scpi_vxi_dev_inst_new(void *priv, struct drv_context *drvc,
		const char *resource, char **params, const char *serialcomm)
{
	struct scpi_vxi *vxi = priv;

	(void)drvc;
	(void)resource;
	(void)serialcomm;

	if (!params || !params[1]) {
		sr_err("Invalid parameters.");
		return SR_ERR;
	}

	vxi->address    = g_strdup(params[1]);
	vxi->instrument = g_strdup(params[2] ? params[2] : "inst0");

	return SR_OK;
}

static int scpi_vxi_open(void *priv)
{
	struct scpi_vxi *vxi = priv;
	Create_LinkParms link_parms;
	Create_LinkResp *link_resp;

	vxi->client = clnt_create(vxi->address, DEVICE_CORE, DEVICE_CORE_VERSION, "tcp");
	if (!vxi->client) {
		sr_err("Client creation failed for %s", vxi->address);
		return SR_ERR;
	}

	/* Set link parameters */
	link_parms.clientId = (long) vxi->client;
	link_parms.lockDevice = 0;
	link_parms.lock_timeout = VXI_DEFAULT_TIMEOUT_MS;
	link_parms.device = "inst0";

	if (!(link_resp = create_link_1(&link_parms, vxi->client))) {
		sr_err("Link creation failed for %s", vxi->address);
		return SR_ERR;
	}
	vxi->link = link_resp->lid;
	vxi->max_send_size = link_resp->maxRecvSize;

	/* Set a default maxRecvSize for devices which do not specify it */
	if (vxi->max_send_size <= 0)
		vxi->max_send_size = 4096;

	return SR_OK;
}

static int scpi_vxi_source_add(struct sr_session *session, void *priv,
		int events, int timeout, sr_receive_data_callback cb, void *cb_data)
{
	(void)priv;

	/* Hook up a dummy handler to receive data from the device. */
	return sr_session_source_add(session, -1, events, timeout, cb, cb_data);
}

static int scpi_vxi_source_remove(struct sr_session *session, void *priv)
{
	(void)priv;

	return sr_session_source_remove(session, -1);
}

/* Operation Flags */
#define DF_WAITLOCK  0x01  /* wait if the operation is locked by another link */
#define DF_END       0x08  /* an END indicator is sent with last byte of buffer */
#define DF_TERM      0x80  /* a termination char is set during a read */

static int scpi_vxi_send(void *priv, const char *command)
{
	struct scpi_vxi *vxi = priv;
	Device_WriteResp *write_resp;
	Device_WriteParms write_parms;
	char *terminated_command;
	unsigned int len;

	terminated_command = g_strdup_printf("%s\r\n", command);
	len = strlen(terminated_command);

	write_parms.lid           = vxi->link;
	write_parms.io_timeout    = VXI_DEFAULT_TIMEOUT_MS;
	write_parms.lock_timeout  = VXI_DEFAULT_TIMEOUT_MS;
	write_parms.flags         = DF_END;
	write_parms.data.data_len = MIN(len, vxi->max_send_size);
	write_parms.data.data_val = terminated_command;

	if (!(write_resp = device_write_1(&write_parms, vxi->client))
	    || write_resp->error) {
		sr_err("Device write failed for %s with error %d",
		       vxi->address, write_resp ? write_resp->error : 0);
		return SR_ERR;
	}

	g_free(terminated_command);

	if (write_resp->size < len)
		sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.",
		       write_resp->size, len, command);
	else
		sr_spew("Successfully sent SCPI command: '%s'.", command);

	return SR_OK;
}

static int scpi_vxi_read_begin(void *priv)
{
	struct scpi_vxi *vxi = priv;

	vxi->read_complete = 0;

	return SR_OK;
}

/* Read Response Reason Flags */
#define RRR_SIZE  0x01  /* requestSize bytes have been transferred */
#define RRR_TERM  0x02  /* a termination char has been read */
#define RRR_END   0x04  /* an END indicator has been read */

static int scpi_vxi_read_data(void *priv, char *buf, int maxlen)
{
	struct scpi_vxi *vxi = priv;
	Device_ReadParms read_parms;
	Device_ReadResp *read_resp;

	read_parms.lid          = vxi->link;
	read_parms.io_timeout   = VXI_DEFAULT_TIMEOUT_MS;
	read_parms.lock_timeout = VXI_DEFAULT_TIMEOUT_MS;
	read_parms.flags        = 0;
	read_parms.termChar     = 0;
	read_parms.requestSize  = maxlen;

	if (!(read_resp = device_read_1(&read_parms, vxi->client))
	    || read_resp->error) {
		sr_err("Device read failed for %s with error %d",
		       vxi->address, read_resp ? read_resp->error : 0);
		return SR_ERR;
	}

	memcpy(buf, read_resp->data.data_val, read_resp->data.data_len);
	vxi->read_complete = read_resp->reason & (RRR_SIZE | RRR_TERM | RRR_END);
	return read_resp->data.data_len;  /* actual number of bytes received */
}

static int scpi_vxi_read_complete(void *priv)
{
	struct scpi_vxi *vxi = priv;

	return vxi->read_complete;
}

static int scpi_vxi_close(void *priv)
{
	struct scpi_vxi *vxi = priv;
	Device_Error *dev_error;

	if (!vxi->client)
		return SR_ERR;

	if (!(dev_error = destroy_link_1(&vxi->link, vxi->client))) {
		sr_err("Link destruction failed for %s", vxi->address);
		return SR_ERR;
	}

	clnt_destroy(vxi->client);
	vxi->client = NULL;

	return SR_OK;
}

static void scpi_vxi_free(void *priv)
{
	struct scpi_vxi *vxi = priv;

	g_free(vxi->address);
	g_free(vxi->instrument);
}

SR_PRIV const struct sr_scpi_dev_inst scpi_vxi_dev = {
	.name          = "VXI",
	.prefix        = "vxi",
	.priv_size     = sizeof(struct scpi_vxi),
	.dev_inst_new  = scpi_vxi_dev_inst_new,
	.open          = scpi_vxi_open,
	.source_add    = scpi_vxi_source_add,
	.source_remove = scpi_vxi_source_remove,
	.send          = scpi_vxi_send,
	.read_begin    = scpi_vxi_read_begin,
	.read_data     = scpi_vxi_read_data,
	.read_complete = scpi_vxi_read_complete,
	.close         = scpi_vxi_close,
	.free          = scpi_vxi_free,
};
Commit	Line	Data
d5876cfb AJ	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
	5	*
	6	* Inspired by the VXI11 Ethernet Protocol for Linux:
	7	* http://optics.eee.nottingham.ac.uk/vxi11/
	8	*
	9	* This program is free software: you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation, either version 3 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	21	*/
	22
	23	#include <rpc/rpc.h>
dc05dd60	24	#include <string.h>
d5876cfb	25	#include "vxi.h"
c1aae900	26	#include <libsigrok/libsigrok.h>
d5876cfb AJ	27	#include "libsigrok-internal.h"
	28
	29	#define LOG_PREFIX "scpi_vxi"
1a46cc62	30	#define VXI_DEFAULT_TIMEOUT_MS 2000
d5876cfb AJ	31
	32	struct scpi_vxi {
	33	char *address;
	34	char *instrument;
	35	CLIENT *client;
	36	Device_Link link;
	37	unsigned int max_send_size;
	38	unsigned int read_complete;
	39	};
	40
17bdda58 AJ	41	static int scpi_vxi_dev_inst_new(void priv, struct drv_context drvc,
17bdda58 AJ	42	const char resource, char params, const char serialcomm)
f754c146 AJ	43	{
	44	struct scpi_vxi *vxi = priv;
	45
17bdda58	46	(void)drvc;
f754c146 AJ	47	(void)resource;
	48	(void)serialcomm;
	49
	50	if (!params \|\| !params[1]) {
	51	sr_err("Invalid parameters.");
	52	return SR_ERR;
	53	}
	54
	55	vxi->address = g_strdup(params[1]);
	56	vxi->instrument = g_strdup(params[2] ? params[2] : "inst0");
	57
	58	return SR_OK;
	59	}
	60
d5876cfb AJ	61	static int scpi_vxi_open(void *priv)
	62	{
	63	struct scpi_vxi *vxi = priv;
	64	Create_LinkParms link_parms;
	65	Create_LinkResp *link_resp;
	66
	67	vxi->client = clnt_create(vxi->address, DEVICE_CORE, DEVICE_CORE_VERSION, "tcp");
98fec29e	68	if (!vxi->client) {
d5876cfb AJ	69	sr_err("Client creation failed for %s", vxi->address);
	70	return SR_ERR;
	71	}
	72
	73	/* Set link parameters */
	74	link_parms.clientId = (long) vxi->client;
	75	link_parms.lockDevice = 0;
1a46cc62	76	link_parms.lock_timeout = VXI_DEFAULT_TIMEOUT_MS;
d5876cfb AJ	77	link_parms.device = "inst0";
	78
	79	if (!(link_resp = create_link_1(&link_parms, vxi->client))) {
	80	sr_err("Link creation failed for %s", vxi->address);
	81	return SR_ERR;
	82	}
	83	vxi->link = link_resp->lid;
	84	vxi->max_send_size = link_resp->maxRecvSize;
	85
	86	/* Set a default maxRecvSize for devices which do not specify it */
	87	if (vxi->max_send_size <= 0)
	88	vxi->max_send_size = 4096;
	89
	90	return SR_OK;
	91	}
	92
102f1239 BV	93	static int scpi_vxi_source_add(struct sr_session session, void priv,
102f1239 BV	94	int events, int timeout, sr_receive_data_callback cb, void *cb_data)
d5876cfb AJ	95	{
	96	(void)priv;
	97
	98	/* Hook up a dummy handler to receive data from the device. */
102f1239	99	return sr_session_source_add(session, -1, events, timeout, cb, cb_data);
d5876cfb AJ	100	}
d5876cfb AJ	101
102f1239	102	static int scpi_vxi_source_remove(struct sr_session session, void priv)
d5876cfb AJ	103	{
	104	(void)priv;
	105
102f1239	106	return sr_session_source_remove(session, -1);
d5876cfb AJ	107	}
	108
	109	/* Operation Flags */
	110	#define DF_WAITLOCK 0x01 /* wait if the operation is locked by another link */
	111	#define DF_END 0x08 /* an END indicator is sent with last byte of buffer */
	112	#define DF_TERM 0x80 /* a termination char is set during a read */
	113
	114	static int scpi_vxi_send(void priv, const char command)
	115	{
	116	struct scpi_vxi *vxi = priv;
	117	Device_WriteResp *write_resp;
	118	Device_WriteParms write_parms;
	119	char *terminated_command;
	120	unsigned int len;
	121
	122	terminated_command = g_strdup_printf("%s\r\n", command);
	123	len = strlen(terminated_command);
	124
	125	write_parms.lid = vxi->link;
1a46cc62 UH	126	write_parms.io_timeout = VXI_DEFAULT_TIMEOUT_MS;
1a46cc62 UH	127	write_parms.lock_timeout = VXI_DEFAULT_TIMEOUT_MS;
d5876cfb AJ	128	write_parms.flags = DF_END;
	129	write_parms.data.data_len = MIN(len, vxi->max_send_size);
	130	write_parms.data.data_val = terminated_command;
	131
	132	if (!(write_resp = device_write_1(&write_parms, vxi->client))
	133	\|\| write_resp->error) {
	134	sr_err("Device write failed for %s with error %d",
f3616a08	135	vxi->address, write_resp ? write_resp->error : 0);
d5876cfb AJ	136	return SR_ERR;
	137	}
	138
	139	g_free(terminated_command);
	140
	141	if (write_resp->size < len)
	142	sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.",
	143	write_resp->size, len, command);
	144	else
	145	sr_spew("Successfully sent SCPI command: '%s'.", command);
	146
	147	return SR_OK;
	148	}
	149
	150	static int scpi_vxi_read_begin(void *priv)
	151	{
	152	struct scpi_vxi *vxi = priv;
	153
	154	vxi->read_complete = 0;
	155
	156	return SR_OK;
	157	}
	158
	159	/* Read Response Reason Flags */
	160	#define RRR_SIZE 0x01 /* requestSize bytes have been transferred */
	161	#define RRR_TERM 0x02 /* a termination char has been read */
	162	#define RRR_END 0x04 /* an END indicator has been read */
	163
	164	static int scpi_vxi_read_data(void priv, char buf, int maxlen)
	165	{
	166	struct scpi_vxi *vxi = priv;
	167	Device_ReadParms read_parms;
	168	Device_ReadResp *read_resp;
	169
	170	read_parms.lid = vxi->link;
1a46cc62 UH	171	read_parms.io_timeout = VXI_DEFAULT_TIMEOUT_MS;
1a46cc62 UH	172	read_parms.lock_timeout = VXI_DEFAULT_TIMEOUT_MS;
d5876cfb AJ	173	read_parms.flags = 0;
	174	read_parms.termChar = 0;
	175	read_parms.requestSize = maxlen;
	176
	177	if (!(read_resp = device_read_1(&read_parms, vxi->client))
	178	\|\| read_resp->error) {
	179	sr_err("Device read failed for %s with error %d",
f3616a08	180	vxi->address, read_resp ? read_resp->error : 0);
d5876cfb AJ	181	return SR_ERR;
	182	}
	183
	184	memcpy(buf, read_resp->data.data_val, read_resp->data.data_len);
	185	vxi->read_complete = read_resp->reason & (RRR_SIZE \| RRR_TERM \| RRR_END);
	186	return read_resp->data.data_len; /* actual number of bytes received */
	187	}
	188
	189	static int scpi_vxi_read_complete(void *priv)
	190	{
	191	struct scpi_vxi *vxi = priv;
	192
	193	return vxi->read_complete;
	194	}
	195
	196	static int scpi_vxi_close(void *priv)
	197	{
	198	struct scpi_vxi *vxi = priv;
	199	Device_Error *dev_error;
	200
dc3b3be5 AJ	201	if (!vxi->client)
	202	return SR_ERR;
	203
d5876cfb AJ	204	if (!(dev_error = destroy_link_1(&vxi->link, vxi->client))) {
	205	sr_err("Link destruction failed for %s", vxi->address);
	206	return SR_ERR;
	207	}
	208
	209	clnt_destroy(vxi->client);
dc3b3be5	210	vxi->client = NULL;
d5876cfb AJ	211
	212	return SR_OK;
	213	}
	214
	215	static void scpi_vxi_free(void *priv)
	216	{
	217	struct scpi_vxi *vxi = priv;
	218
	219	g_free(vxi->address);
	220	g_free(vxi->instrument);
d5876cfb AJ	221	}
d5876cfb AJ	222
f754c146 AJ	223	SR_PRIV const struct sr_scpi_dev_inst scpi_vxi_dev = {
	224	.name = "VXI",
	225	.prefix = "vxi",
	226	.priv_size = sizeof(struct scpi_vxi),
	227	.dev_inst_new = scpi_vxi_dev_inst_new,
	228	.open = scpi_vxi_open,
	229	.source_add = scpi_vxi_source_add,
	230	.source_remove = scpi_vxi_source_remove,
	231	.send = scpi_vxi_send,
	232	.read_begin = scpi_vxi_read_begin,
	233	.read_data = scpi_vxi_read_data,
	234	.read_complete = scpi_vxi_read_complete,
	235	.close = scpi_vxi_close,
	236	.free = scpi_vxi_free,
	237	};