[libsigrok.git] / hardware / common / 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 "vxi.h"
#include "libsigrok.h"
#include "libsigrok-internal.h"

#define LOG_PREFIX "scpi_vxi"
#define VXI_DEFAULT_TIMEOUT  2000  /* in ms */

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 == NULL) {
		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;
	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(void *priv, int events, int timeout,
			sr_receive_data_callback_t cb, void *cb_data)
{
	(void)priv;

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

static int scpi_vxi_source_remove(void *priv)
{
	(void)priv;

	return sr_source_remove(-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;
	write_parms.lock_timeout  = VXI_DEFAULT_TIMEOUT;
	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->error);
		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;
	read_parms.lock_timeout = VXI_DEFAULT_TIMEOUT;
	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->error);
		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>
	24	#include "vxi.h"
	25	#include "libsigrok.h"
	26	#include "libsigrok-internal.h"
	27
	28	#define LOG_PREFIX "scpi_vxi"
	29	#define VXI_DEFAULT_TIMEOUT 2000 /* in ms */
	30
	31	struct scpi_vxi {
	32	char *address;
	33	char *instrument;
	34	CLIENT *client;
	35	Device_Link link;
	36	unsigned int max_send_size;
	37	unsigned int read_complete;
	38	};
	39
17bdda58 AJ	40	static int scpi_vxi_dev_inst_new(void priv, struct drv_context drvc,
17bdda58 AJ	41	const char resource, char params, const char serialcomm)
f754c146 AJ	42	{
	43	struct scpi_vxi *vxi = priv;
	44
17bdda58	45	(void)drvc;
f754c146 AJ	46	(void)resource;
	47	(void)serialcomm;
	48
	49	if (!params \|\| !params[1]) {
	50	sr_err("Invalid parameters.");
	51	return SR_ERR;
	52	}
	53
	54	vxi->address = g_strdup(params[1]);
	55	vxi->instrument = g_strdup(params[2] ? params[2] : "inst0");
	56
	57	return SR_OK;
	58	}
	59
d5876cfb AJ	60	static int scpi_vxi_open(void *priv)
	61	{
	62	struct scpi_vxi *vxi = priv;
	63	Create_LinkParms link_parms;
	64	Create_LinkResp *link_resp;
	65
	66	vxi->client = clnt_create(vxi->address, DEVICE_CORE, DEVICE_CORE_VERSION, "tcp");
	67	if (vxi->client == NULL) {
	68	sr_err("Client creation failed for %s", vxi->address);
	69	return SR_ERR;
	70	}
	71
	72	/* Set link parameters */
	73	link_parms.clientId = (long) vxi->client;
	74	link_parms.lockDevice = 0;
	75	link_parms.lock_timeout = VXI_DEFAULT_TIMEOUT;
	76	link_parms.device = "inst0";
	77
	78	if (!(link_resp = create_link_1(&link_parms, vxi->client))) {
	79	sr_err("Link creation failed for %s", vxi->address);
	80	return SR_ERR;
	81	}
	82	vxi->link = link_resp->lid;
	83	vxi->max_send_size = link_resp->maxRecvSize;
	84
	85	/* Set a default maxRecvSize for devices which do not specify it */
	86	if (vxi->max_send_size <= 0)
	87	vxi->max_send_size = 4096;
	88
	89	return SR_OK;
	90	}
	91
	92	static int scpi_vxi_source_add(void *priv, int events, int timeout,
	93	sr_receive_data_callback_t cb, void *cb_data)
	94	{
	95	(void)priv;
	96
	97	/* Hook up a dummy handler to receive data from the device. */
	98	return sr_source_add(-1, events, timeout, cb, cb_data);
	99	}
	100
	101	static int scpi_vxi_source_remove(void *priv)
	102	{
	103	(void)priv;
	104
	105	return sr_source_remove(-1);
	106	}
	107
	108	/* Operation Flags */
	109	#define DF_WAITLOCK 0x01 /* wait if the operation is locked by another link */
	110	#define DF_END 0x08 /* an END indicator is sent with last byte of buffer */
	111	#define DF_TERM 0x80 /* a termination char is set during a read */
	112
	113	static int scpi_vxi_send(void priv, const char command)
	114	{
	115	struct scpi_vxi *vxi = priv;
	116	Device_WriteResp *write_resp;
	117	Device_WriteParms write_parms;
	118	char *terminated_command;
	119	unsigned int len;
	120
	121	terminated_command = g_strdup_printf("%s\r\n", command);
	122	len = strlen(terminated_command);
	123
124	write_parms.lid = vxi->link;
125	write_parms.io_timeout = VXI_DEFAULT_TIMEOUT;
126	write_parms.lock_timeout = VXI_DEFAULT_TIMEOUT;
127	write_parms.flags = DF_END;
128	write_parms.data.data_len = MIN(len, vxi->max_send_size);
129	write_parms.data.data_val = terminated_command;
130
131	if (!(write_resp = device_write_1(&write_parms, vxi->client))
132	\|\| write_resp->error) {
133	sr_err("Device write failed for %s with error %d",
134	vxi->address, write_resp->error);
135	return SR_ERR;
136	}
137
138	g_free(terminated_command);
139
140	if (write_resp->size < len)
141	sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.",
142	write_resp->size, len, command);
143	else
144	sr_spew("Successfully sent SCPI command: '%s'.", command);
145
146	return SR_OK;
147	}
148
149	static int scpi_vxi_read_begin(void *priv)
150	{
151	struct scpi_vxi *vxi = priv;
152
153	vxi->read_complete = 0;
154
155	return SR_OK;
156	}
157
158	/* Read Response Reason Flags */
159	#define RRR_SIZE 0x01 /* requestSize bytes have been transferred */
160	#define RRR_TERM 0x02 /* a termination char has been read */
161	#define RRR_END 0x04 /* an END indicator has been read */
162
163	static int scpi_vxi_read_data(void priv, char buf, int maxlen)
164	{
165	struct scpi_vxi *vxi = priv;
166	Device_ReadParms read_parms;
167	Device_ReadResp *read_resp;
168
169	read_parms.lid = vxi->link;
170	read_parms.io_timeout = VXI_DEFAULT_TIMEOUT;
171	read_parms.lock_timeout = VXI_DEFAULT_TIMEOUT;
172	read_parms.flags = 0;
173	read_parms.termChar = 0;
174	read_parms.requestSize = maxlen;
175
176	if (!(read_resp = device_read_1(&read_parms, vxi->client))
177	\|\| read_resp->error) {
178	sr_err("Device read failed for %s with error %d",
179	vxi->address, read_resp->error);
180	return SR_ERR;
181	}
182
183	memcpy(buf, read_resp->data.data_val, read_resp->data.data_len);
184	vxi->read_complete = read_resp->reason & (RRR_SIZE \| RRR_TERM \| RRR_END);
185	return read_resp->data.data_len; /* actual number of bytes received */
186	}
187
188	static int scpi_vxi_read_complete(void *priv)
189	{
190	struct scpi_vxi *vxi = priv;
191
192	return vxi->read_complete;
193	}
194
195	static int scpi_vxi_close(void *priv)
196	{
197	struct scpi_vxi *vxi = priv;
198	Device_Error *dev_error;
199
dc3b3be5 AJ	200	if (!vxi->client)
	201	return SR_ERR;
	202
d5876cfb AJ	203	if (!(dev_error = destroy_link_1(&vxi->link, vxi->client))) {
	204	sr_err("Link destruction failed for %s", vxi->address);
	205	return SR_ERR;
	206	}
	207
	208	clnt_destroy(vxi->client);
dc3b3be5	209	vxi->client = NULL;
d5876cfb AJ	210
	211	return SR_OK;
	212	}
	213
	214	static void scpi_vxi_free(void *priv)
	215	{
	216	struct scpi_vxi *vxi = priv;
	217
	218	g_free(vxi->address);
	219	g_free(vxi->instrument);
d5876cfb AJ	220	}
d5876cfb AJ	221
f754c146 AJ	222	SR_PRIV const struct sr_scpi_dev_inst scpi_vxi_dev = {
	223	.name = "VXI",
	224	.prefix = "vxi",
	225	.priv_size = sizeof(struct scpi_vxi),
	226	.dev_inst_new = scpi_vxi_dev_inst_new,
	227	.open = scpi_vxi_open,
	228	.source_add = scpi_vxi_source_add,
	229	.source_remove = scpi_vxi_source_remove,
	230	.send = scpi_vxi_send,
	231	.read_begin = scpi_vxi_read_begin,
	232	.read_data = scpi_vxi_read_data,
	233	.read_complete = scpi_vxi_read_complete,
	234	.close = scpi_vxi_close,
	235	.free = scpi_vxi_free,
	236	};