2 * This file is part of the libsigrok project.
4 * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
6 * Inspired by the VXI11 Ethernet Protocol for Linux:
7 * http://optics.eee.nottingham.ac.uk/vxi11/
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.
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.
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/>.
27 #include "libsigrok.h"
28 #include "libsigrok-internal.h"
30 #define LOG_PREFIX "scpi_vxi"
31 #define VXI_DEFAULT_TIMEOUT 2000 /* in ms */
38 unsigned int max_send_size;
39 unsigned int read_complete;
42 static int scpi_vxi_dev_inst_new(void *priv, struct drv_context *drvc,
43 const char *resource, char **params, const char *serialcomm)
45 struct scpi_vxi *vxi = priv;
51 if (!params || !params[1]) {
52 sr_err("Invalid parameters.");
56 vxi->address = g_strdup(params[1]);
57 vxi->instrument = g_strdup(params[2] ? params[2] : "inst0");
62 static int scpi_vxi_open(void *priv)
64 struct scpi_vxi *vxi = priv;
65 Create_LinkParms link_parms;
66 Create_LinkResp *link_resp;
68 vxi->client = clnt_create(vxi->address, DEVICE_CORE, DEVICE_CORE_VERSION, "tcp");
69 if (vxi->client == NULL) {
70 sr_err("Client creation failed for %s", vxi->address);
74 /* Set link parameters */
75 link_parms.clientId = (long) vxi->client;
76 link_parms.lockDevice = 0;
77 link_parms.lock_timeout = VXI_DEFAULT_TIMEOUT;
78 link_parms.device = "inst0";
80 if (!(link_resp = create_link_1(&link_parms, vxi->client))) {
81 sr_err("Link creation failed for %s", vxi->address);
84 vxi->link = link_resp->lid;
85 vxi->max_send_size = link_resp->maxRecvSize;
87 /* Set a default maxRecvSize for devices which do not specify it */
88 if (vxi->max_send_size <= 0)
89 vxi->max_send_size = 4096;
94 static int scpi_vxi_source_add(struct sr_session *session, void *priv,
95 int events, int timeout, sr_receive_data_callback cb, void *cb_data)
99 /* Hook up a dummy handler to receive data from the device. */
100 return sr_session_source_add(session, -1, events, timeout, cb, cb_data);
103 static int scpi_vxi_source_remove(struct sr_session *session, void *priv)
107 return sr_session_source_remove(session, -1);
110 /* Operation Flags */
111 #define DF_WAITLOCK 0x01 /* wait if the operation is locked by another link */
112 #define DF_END 0x08 /* an END indicator is sent with last byte of buffer */
113 #define DF_TERM 0x80 /* a termination char is set during a read */
115 static int scpi_vxi_send(void *priv, const char *command)
117 struct scpi_vxi *vxi = priv;
118 Device_WriteResp *write_resp;
119 Device_WriteParms write_parms;
120 char *terminated_command;
123 terminated_command = g_strdup_printf("%s\r\n", command);
124 len = strlen(terminated_command);
126 write_parms.lid = vxi->link;
127 write_parms.io_timeout = VXI_DEFAULT_TIMEOUT;
128 write_parms.lock_timeout = VXI_DEFAULT_TIMEOUT;
129 write_parms.flags = DF_END;
130 write_parms.data.data_len = MIN(len, vxi->max_send_size);
131 write_parms.data.data_val = terminated_command;
133 if (!(write_resp = device_write_1(&write_parms, vxi->client))
134 || write_resp->error) {
135 sr_err("Device write failed for %s with error %d",
136 vxi->address, write_resp->error);
140 g_free(terminated_command);
142 if (write_resp->size < len)
143 sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.",
144 write_resp->size, len, command);
146 sr_spew("Successfully sent SCPI command: '%s'.", command);
151 static int scpi_vxi_read_begin(void *priv)
153 struct scpi_vxi *vxi = priv;
155 vxi->read_complete = 0;
160 /* Read Response Reason Flags */
161 #define RRR_SIZE 0x01 /* requestSize bytes have been transferred */
162 #define RRR_TERM 0x02 /* a termination char has been read */
163 #define RRR_END 0x04 /* an END indicator has been read */
165 static int scpi_vxi_read_data(void *priv, char *buf, int maxlen)
167 struct scpi_vxi *vxi = priv;
168 Device_ReadParms read_parms;
169 Device_ReadResp *read_resp;
171 read_parms.lid = vxi->link;
172 read_parms.io_timeout = VXI_DEFAULT_TIMEOUT;
173 read_parms.lock_timeout = VXI_DEFAULT_TIMEOUT;
174 read_parms.flags = 0;
175 read_parms.termChar = 0;
176 read_parms.requestSize = maxlen;
178 if (!(read_resp = device_read_1(&read_parms, vxi->client))
179 || read_resp->error) {
180 sr_err("Device read failed for %s with error %d",
181 vxi->address, read_resp->error);
185 memcpy(buf, read_resp->data.data_val, read_resp->data.data_len);
186 vxi->read_complete = read_resp->reason & (RRR_SIZE | RRR_TERM | RRR_END);
187 return read_resp->data.data_len; /* actual number of bytes received */
190 static int scpi_vxi_read_complete(void *priv)
192 struct scpi_vxi *vxi = priv;
194 return vxi->read_complete;
197 static int scpi_vxi_close(void *priv)
199 struct scpi_vxi *vxi = priv;
200 Device_Error *dev_error;
205 if (!(dev_error = destroy_link_1(&vxi->link, vxi->client))) {
206 sr_err("Link destruction failed for %s", vxi->address);
210 clnt_destroy(vxi->client);
216 static void scpi_vxi_free(void *priv)
218 struct scpi_vxi *vxi = priv;
220 g_free(vxi->address);
221 g_free(vxi->instrument);
224 SR_PRIV const struct sr_scpi_dev_inst scpi_vxi_dev = {
227 .priv_size = sizeof(struct scpi_vxi),
228 .dev_inst_new = scpi_vxi_dev_inst_new,
229 .open = scpi_vxi_open,
230 .source_add = scpi_vxi_source_add,
231 .source_remove = scpi_vxi_source_remove,
232 .send = scpi_vxi_send,
233 .read_begin = scpi_vxi_read_begin,
234 .read_data = scpi_vxi_read_data,
235 .read_complete = scpi_vxi_read_complete,
236 .close = scpi_vxi_close,
237 .free = scpi_vxi_free,