2 * This file is part of the sigrok project.
4 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/types.h>
27 #include "libsigrok.h"
28 #include "libsigrok-internal.h"
31 #define SERIALCOMM "2400/8n1"
33 static const int hwopts[] = {
39 static const int hwcaps[] = {
41 SR_HWCAP_LIMIT_SAMPLES,
46 static const char *probe_names[] = {
51 SR_PRIV struct sr_dev_driver tekpower_dmm_driver_info;
52 static struct sr_dev_driver *di = &tekpower_dmm_driver_info;
54 /* Properly close and free all devices. */
55 static int clear_instances(void)
57 struct sr_dev_inst *sdi;
58 struct drv_context *drvc;
59 struct dev_context *devc;
62 if (!(drvc = di->priv))
66 for (l = drvc->instances; l; l = l->next) {
69 if (!(devc = sdi->priv))
71 sr_serial_dev_inst_free(devc->serial);
72 sr_dev_inst_free(sdi);
74 g_slist_free(drvc->instances);
75 drvc->instances = NULL;
80 static int hw_init(void)
82 struct drv_context *drvc;
84 if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
85 sr_err("Driver context malloc failed.");
94 static GSList *lcd14_scan(const char *conn, const char *serialcomm)
96 struct sr_dev_inst *sdi;
97 struct drv_context *drvc;
98 struct dev_context *devc;
99 struct sr_probe *probe;
100 struct sr_serial_dev_inst *serial;
106 if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
109 if (serial_open(serial, O_RDONLY | O_NONBLOCK) != SR_OK)
112 sr_info("Probing port %s readonly.", conn);
116 serial_flush(serial);
119 * There's no way to get an ID from the multimeter. It just sends data
120 * periodically, so the best we can do is check if the packets match
121 * the expected format.
124 /* Let's get a bit of data and see if we can find a packet. */
127 ret = serial_stream_detect(serial, buf, &len, FS9721_PACKET_SIZE,
128 sr_fs9721_packet_valid, 1000, 2400);
133 * If we dropped more than two packets worth of data, something is
134 * wrong. We shouldn't quit however, since the dropped bytes might be
135 * just zeroes at the beginning of the stream. Those can occur as a
136 * combination of the nonstandard cable that ships with this device and
137 * the serial port or USB to serial adapter.
139 dropped = len - FS9721_PACKET_SIZE;
140 if (dropped > 2 * FS9721_PACKET_SIZE)
141 sr_warn("Had to drop too much data.");
143 sr_info("Found device on port %s.", conn);
145 if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "TekPower",
149 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
150 sr_err("Device context malloc failed.");
154 devc->serial = serial;
158 if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
160 sdi->probes = g_slist_append(sdi->probes, probe);
161 drvc->instances = g_slist_append(drvc->instances, sdi);
162 devices = g_slist_append(devices, sdi);
165 serial_close(serial);
170 static GSList *hw_scan(GSList *options)
172 struct sr_hwopt *opt;
174 const char *conn, *serialcomm;
176 conn = serialcomm = NULL;
177 for (l = options; l; l = l->next) {
179 switch (opt->hwopt) {
183 case SR_HWOPT_SERIALCOMM:
184 serialcomm = opt->value;
192 /* Use the provided comm specs. */
193 devices = lcd14_scan(conn, serialcomm);
195 /* Try the default. */
196 devices = lcd14_scan(conn, SERIALCOMM);
202 static GSList *hw_dev_list(void)
204 struct drv_context *drvc;
208 return drvc->instances;
211 static int hw_dev_open(struct sr_dev_inst *sdi)
213 struct dev_context *devc;
215 if (!(devc = sdi->priv)) {
216 sr_err("sdi->priv was NULL.");
220 if (serial_open(devc->serial, O_RDONLY) != SR_OK)
223 sdi->status = SR_ST_ACTIVE;
228 static int hw_dev_close(struct sr_dev_inst *sdi)
230 struct dev_context *devc;
232 if (!(devc = sdi->priv)) {
233 sr_err("sdi->priv was NULL.");
237 if (devc->serial && devc->serial->fd != -1) {
238 serial_close(devc->serial);
239 sdi->status = SR_ST_INACTIVE;
245 static int hw_cleanup(void)
252 static int hw_info_get(int info_id, const void **data,
253 const struct sr_dev_inst *sdi)
264 case SR_DI_NUM_PROBES:
265 *data = GINT_TO_POINTER(1);
267 case SR_DI_PROBE_NAMES:
277 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
280 struct dev_context *devc;
282 if (sdi->status != SR_ST_ACTIVE)
285 if (!(devc = sdi->priv)) {
286 sr_err("sdi->priv was NULL.");
291 case SR_HWCAP_LIMIT_SAMPLES:
292 devc->limit_samples = *(const uint64_t *)value;
293 sr_dbg("Setting sample limit to %" PRIu64 ".",
294 devc->limit_samples);
297 sr_err("Unknown capability: %d.", hwcap);
305 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
308 struct sr_datafeed_packet packet;
309 struct sr_datafeed_header header;
310 struct sr_datafeed_meta_analog meta;
311 struct dev_context *devc;
313 if (!(devc = sdi->priv)) {
314 sr_err("sdi->priv was NULL.");
318 sr_dbg("Starting acquisition.");
320 devc->cb_data = cb_data;
323 * Reset the number of samples to take. If we've already collected our
324 * quota, but we start a new session, and don't reset this, we'll just
325 * quit without acquiring any new samples.
327 devc->num_samples = 0;
329 /* Send header packet to the session bus. */
330 sr_dbg("Sending SR_DF_HEADER.");
331 packet.type = SR_DF_HEADER;
332 packet.payload = (uint8_t *)&header;
333 header.feed_version = 1;
334 gettimeofday(&header.starttime, NULL);
335 sr_session_send(devc->cb_data, &packet);
337 /* Send metadata about the SR_DF_ANALOG packets to come. */
338 sr_dbg("Sending SR_DF_META_ANALOG.");
339 packet.type = SR_DF_META_ANALOG;
340 packet.payload = &meta;
342 sr_session_send(devc->cb_data, &packet);
344 /* Poll every 50ms, or whenever some data comes in. */
345 sr_source_add(devc->serial->fd, G_IO_IN, 50,
346 tekpower_dmm_receive_data, (void *)sdi);
351 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
353 struct sr_datafeed_packet packet;
354 struct dev_context *devc;
356 if (sdi->status != SR_ST_ACTIVE)
359 if (!(devc = sdi->priv)) {
360 sr_err("sdi->priv was NULL.");
364 sr_dbg("Stopping acquisition.");
366 sr_source_remove(devc->serial->fd);
367 hw_dev_close((struct sr_dev_inst *)sdi);
369 /* Send end packet to the session bus. */
370 sr_dbg("Sending SR_DF_END.");
371 packet.type = SR_DF_END;
372 sr_session_send(cb_data, &packet);
377 SR_PRIV struct sr_dev_driver tekpower_dmm_driver_info = {
378 .name = "tekpower-dmm",
379 .longname = "TekPower/Digitek TP4000ZC/DT4000ZC DMM",
382 .cleanup = hw_cleanup,
384 .dev_list = hw_dev_list,
385 .dev_clear = clear_instances,
386 .dev_open = hw_dev_open,
387 .dev_close = hw_dev_close,
388 .info_get = hw_info_get,
389 .dev_config_set = hw_dev_config_set,
390 .dev_acquisition_start = hw_dev_acquisition_start,
391 .dev_acquisition_stop = hw_dev_acquisition_stop,