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 static const int hwopts[] = {
37 static const int hwcaps[] = {
39 SR_HWCAP_LIMIT_SAMPLES,
44 static const char *probe_names[] = {
49 SR_PRIV struct sr_dev_driver tekpower_dmm_driver_info;
50 static struct sr_dev_driver *di = &tekpower_dmm_driver_info;
52 /* Properly close and free all devices. */
53 static int clear_instances(void)
55 struct sr_dev_inst *sdi;
56 struct drv_context *drvc;
57 struct dev_context *devc;
60 if (!(drvc = di->priv))
64 for (l = drvc->instances; l; l = l->next) {
67 if (!(devc = sdi->priv))
69 sr_serial_dev_inst_free(devc->serial);
70 sr_dev_inst_free(sdi);
72 g_slist_free(drvc->instances);
73 drvc->instances = NULL;
78 static int hw_init(void)
80 struct drv_context *drvc;
82 if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
83 sr_err("Driver context malloc failed.");
92 static GSList *lcd14_scan(const char *conn, const char *serialcomm)
94 struct sr_dev_inst *sdi;
95 struct drv_context *drvc;
96 struct dev_context *devc;
97 struct sr_probe *probe;
98 struct fs9721_packet *packet;
100 int i, len, fd, retry, good_packets = 0, dropped, ret;
103 if ((fd = serial_open(conn, O_RDONLY | O_NONBLOCK)) == -1) {
104 sr_err("Unable to open %s: %s.", conn, strerror(errno));
107 if ((ret = serial_set_paramstr(fd, serialcomm)) != SR_OK) {
108 sr_err("Unable to set serial parameters: %d", ret);
112 sr_info("Probing port %s readonly.", conn);
121 * There's no way to get an ID from the multimeter. It just sends data
122 * periodically, so the best we can do is check if the packets match
123 * the expected format.
125 while (!devices && retry < 3) {
128 /* Let's get a bit of data and see if we can find a packet. */
130 serial_readline(fd, &b, &len, 500);
131 if ((len == 0) || (len < FS9721_PACKET_SIZE)) {
132 /* Not enough data received, is the DMM connected? */
136 /* Let's treat our buffer like a stream, and find any
138 for (i = 0; i < len - FS9721_PACKET_SIZE + 1;) {
139 packet = (void *)(&buf[i]);
140 if (!fs9721_is_packet_valid(packet, NULL)) {
145 i += FS9721_PACKET_SIZE;
149 * If we dropped more than two packets worth of data,
150 * something is wrong.
152 dropped = len - (good_packets * FS9721_PACKET_SIZE);
153 if (dropped > 2 * FS9721_PACKET_SIZE)
156 /* Let's see if we have anything good. */
157 if (good_packets == 0)
160 sr_info("Found device on port %s.", conn);
162 if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "TekPower",
165 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
166 sr_err("Device context malloc failed.");
170 devc->serial = sr_serial_dev_inst_new(conn, -1);
171 devc->serialcomm = g_strdup(serialcomm);
175 if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
177 sdi->probes = g_slist_append(sdi->probes, probe);
178 drvc->instances = g_slist_append(drvc->instances, sdi);
179 devices = g_slist_append(devices, sdi);
187 static GSList *hw_scan(GSList *options)
189 struct sr_hwopt *opt;
191 const char *conn, *serialcomm;
193 conn = serialcomm = NULL;
194 for (l = options; l; l = l->next) {
196 switch (opt->hwopt) {
200 case SR_HWOPT_SERIALCOMM:
201 serialcomm = opt->value;
209 /* Use the provided comm specs. */
210 devices = lcd14_scan(conn, serialcomm);
212 /* Try the default 2400/8n1. */
213 devices = lcd14_scan(conn, "2400/8n1");
219 static GSList *hw_dev_list(void)
221 struct drv_context *drvc;
225 return drvc->instances;
228 static int hw_dev_open(struct sr_dev_inst *sdi)
231 struct dev_context *devc;
233 if (!(devc = sdi->priv)) {
234 sr_err("sdi->priv was NULL.");
238 devc->serial->fd = serial_open(devc->serial->port, O_RDONLY);
239 if (devc->serial->fd == -1) {
240 sr_err("Couldn't open serial port '%s'.", devc->serial->port);
244 ret = serial_set_paramstr(devc->serial->fd, devc->serialcomm);
246 sr_err("Unable to set serial parameters: %d.", ret);
249 sdi->status = SR_ST_ACTIVE;
254 static int hw_dev_close(struct sr_dev_inst *sdi)
256 struct dev_context *devc;
258 if (!(devc = sdi->priv)) {
259 sr_err("sdi->priv was NULL.");
263 if (devc->serial && devc->serial->fd != -1) {
264 serial_close(devc->serial->fd);
265 devc->serial->fd = -1;
266 sdi->status = SR_ST_INACTIVE;
272 static int hw_cleanup(void)
279 static int hw_info_get(int info_id, const void **data,
280 const struct sr_dev_inst *sdi)
291 case SR_DI_NUM_PROBES:
292 *data = GINT_TO_POINTER(1);
294 case SR_DI_PROBE_NAMES:
304 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
307 struct dev_context *devc;
309 if (sdi->status != SR_ST_ACTIVE)
312 if (!(devc = sdi->priv)) {
313 sr_err("sdi->priv was NULL.");
318 case SR_HWCAP_LIMIT_SAMPLES:
319 devc->limit_samples = *(const uint64_t *)value;
320 sr_dbg("Setting sample limit to %" PRIu64 ".",
321 devc->limit_samples);
324 sr_err("Unknown capability: %d.", hwcap);
332 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
335 struct sr_datafeed_packet packet;
336 struct sr_datafeed_header header;
337 struct sr_datafeed_meta_analog meta;
338 struct dev_context *devc;
340 if (!(devc = sdi->priv)) {
341 sr_err("sdi->priv was NULL.");
345 sr_dbg("Starting acquisition.");
347 devc->cb_data = cb_data;
350 * Reset the number of samples to take. If we've already collected our
351 * quota, but we start a new session, and don't reset this, we'll just
352 * quit without acquiring any new samples.
354 devc->num_samples = 0;
356 /* Send header packet to the session bus. */
357 sr_dbg("Sending SR_DF_HEADER.");
358 packet.type = SR_DF_HEADER;
359 packet.payload = (uint8_t *)&header;
360 header.feed_version = 1;
361 gettimeofday(&header.starttime, NULL);
362 sr_session_send(devc->cb_data, &packet);
364 /* Send metadata about the SR_DF_ANALOG packets to come. */
365 sr_dbg("Sending SR_DF_META_ANALOG.");
366 packet.type = SR_DF_META_ANALOG;
367 packet.payload = &meta;
369 sr_session_send(devc->cb_data, &packet);
371 /* Poll every 50ms, or whenever some data comes in. */
372 sr_source_add(devc->serial->fd, G_IO_IN, 50,
373 tekpower_dmm_receive_data, (void *)sdi);
378 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
381 struct sr_datafeed_packet packet;
382 struct dev_context *devc;
384 if (sdi->status != SR_ST_ACTIVE)
387 if (!(devc = sdi->priv)) {
388 sr_err("sdi->priv was NULL.");
392 sr_dbg("Stopping acquisition.");
394 sr_source_remove(devc->serial->fd);
395 hw_dev_close((struct sr_dev_inst *)sdi);
397 /* Send end packet to the session bus. */
398 sr_dbg("Sending SR_DF_END.");
399 packet.type = SR_DF_END;
400 sr_session_send(cb_data, &packet);
405 SR_PRIV struct sr_dev_driver tekpower_dmm_driver_info = {
406 .name = "tekpower-dmm",
407 .longname = "TekPower/Digitek TP4000ZC/DT4000ZC DMM",
410 .cleanup = hw_cleanup,
412 .dev_list = hw_dev_list,
413 .dev_clear = clear_instances,
414 .dev_open = hw_dev_open,
415 .dev_close = hw_dev_close,
416 .info_get = hw_info_get,
417 .dev_config_set = hw_dev_config_set,
418 .dev_acquisition_start = hw_dev_acquisition_start,
419 .dev_acquisition_stop = hw_dev_acquisition_stop,