2 * This file is part of the libsigrok project.
4 * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include <sys/timerfd.h>
25 static const uint32_t drvopts[] = {
30 static const uint32_t devopts[] = {
32 SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
33 SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
34 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
38 * Currently there are two channel-group/probe options for ACME:
39 * - SR_CONF_PROBE_FACTOR - allows to modify current shunt resistance
41 * - SR_CONF_POWER_OFF - allows to remotely cut-off/restore power to
44 * They are not static - we have to check each probe's capabilities in
47 #define MAX_DEVOPTS_CG 2
48 #define HAS_PROBE_FACTOR (SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET)
49 #define HAS_POWER_OFF (SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET)
51 #define MAX_SAMPLE_RATE 500 /* In Hz */
53 static const uint64_t samplerates[] = {
55 SR_HZ(MAX_SAMPLE_RATE),
59 static GSList *scan(struct sr_dev_driver *di, GSList *options)
61 struct dev_context *devc;
62 struct sr_dev_inst *sdi;
68 devc = g_malloc0(sizeof(struct dev_context));
69 devc->samplerate = SR_HZ(10);
71 sdi = g_malloc0(sizeof(struct sr_dev_inst));
72 sdi->status = SR_ST_INACTIVE;
73 sdi->vendor = g_strdup("BayLibre");
74 sdi->model = g_strdup("ACME");
77 status = bl_acme_is_sane();
82 * Iterate over all ACME connectors and check if any probes
85 for (i = 0; i < MAX_PROBES; i++) {
87 * First check if there's an energy probe on this connector. If
88 * not, and we're already at the fifth probe - see if we can
89 * detect a temperature probe.
91 status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i),
92 PROBE_NUM(i), ENRG_PROBE_NAME);
94 /* Energy probe detected. */
95 status = bl_acme_register_probe(sdi, PROBE_ENRG,
96 bl_acme_get_enrg_addr(i), PROBE_NUM(i));
98 sr_err("Error registering power probe %d",
102 } else if (i >= TEMP_PRB_START_INDEX) {
103 status = bl_acme_detect_probe(bl_acme_get_temp_addr(i),
104 PROBE_NUM(i), TEMP_PROBE_NAME);
106 /* Temperature probe detected. */
107 status = bl_acme_register_probe(sdi,PROBE_TEMP,
108 bl_acme_get_temp_addr(i), PROBE_NUM(i));
110 sr_err("Error registering temp "
111 "probe %d", PROBE_NUM(i));
119 * Let's assume there's no ACME device present if no probe
120 * has been registered.
122 if (!sdi->channel_groups)
125 return std_scan_complete(di, g_slist_append(NULL, sdi));
129 sr_dev_inst_free(sdi);
134 static int config_get(uint32_t key, GVariant **data,
135 const struct sr_dev_inst *sdi,
136 const struct sr_channel_group *cg)
138 struct dev_context *devc;
147 case SR_CONF_LIMIT_SAMPLES:
148 case SR_CONF_LIMIT_MSEC:
149 ret = sr_sw_limits_config_get(&devc->limits, key, data);
151 case SR_CONF_SAMPLERATE:
152 *data = g_variant_new_uint64(devc->samplerate);
154 case SR_CONF_PROBE_FACTOR:
156 return SR_ERR_CHANNEL_GROUP;
157 ret = bl_acme_get_shunt(cg, &shunt);
159 *data = g_variant_new_uint64(shunt);
161 case SR_CONF_POWER_OFF:
163 return SR_ERR_CHANNEL_GROUP;
164 ret = bl_acme_read_power_state(cg, &power_off);
166 *data = g_variant_new_boolean(power_off);
175 static int config_set(uint32_t key, GVariant *data,
176 const struct sr_dev_inst *sdi,
177 const struct sr_channel_group *cg)
179 struct dev_context *devc;
187 case SR_CONF_LIMIT_SAMPLES:
188 case SR_CONF_LIMIT_MSEC:
189 ret = sr_sw_limits_config_set(&devc->limits, key, data);
191 case SR_CONF_SAMPLERATE:
192 samplerate = g_variant_get_uint64(data);
193 if (samplerate > MAX_SAMPLE_RATE) {
194 sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE);
195 ret = SR_ERR_SAMPLERATE;
198 devc->samplerate = samplerate;
199 bl_acme_maybe_set_update_interval(sdi, samplerate);
201 case SR_CONF_PROBE_FACTOR:
203 return SR_ERR_CHANNEL_GROUP;
204 ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data));
206 case SR_CONF_POWER_OFF:
208 return SR_ERR_CHANNEL_GROUP;
209 ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data));
218 static int config_list(uint32_t key, GVariant **data,
219 const struct sr_dev_inst *sdi,
220 const struct sr_channel_group *cg)
222 uint32_t devopts_cg[MAX_DEVOPTS_CG];
225 int num_devopts_cg = 0;
229 case SR_CONF_DEVICE_OPTIONS:
230 return STD_CONFIG_LIST(key, data, sdi, cg, NULL, drvopts, devopts);
231 case SR_CONF_SAMPLERATE:
232 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
233 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
234 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
235 g_variant_builder_add(&gvb, "{sv}",
236 "samplerate-steps", gvar);
237 *data = g_variant_builder_end(&gvb);
244 case SR_CONF_DEVICE_OPTIONS:
245 if (bl_acme_get_probe_type(cg) == PROBE_ENRG)
246 devopts_cg[num_devopts_cg++] = HAS_PROBE_FACTOR;
247 if (bl_acme_probe_has_pws(cg))
248 devopts_cg[num_devopts_cg++] = HAS_POWER_OFF;
250 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
251 devopts_cg, num_devopts_cg, sizeof(uint32_t));
261 static void dev_acquisition_close(const struct sr_dev_inst *sdi)
264 struct sr_channel *ch;
266 for (chl = sdi->channels; chl; chl = chl->next) {
268 bl_acme_close_channel(ch);
272 static int dev_acquisition_open(const struct sr_dev_inst *sdi)
275 struct sr_channel *ch;
277 for (chl = sdi->channels; chl; chl = chl->next) {
279 if (bl_acme_open_channel(ch)) {
280 sr_err("Error opening channel %s", ch->name);
281 dev_acquisition_close(sdi);
289 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
291 struct dev_context *devc;
292 struct itimerspec tspec = {
293 .it_interval = { 0, 0 },
297 if (dev_acquisition_open(sdi))
301 devc->samples_missed = 0;
302 devc->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
303 if (devc->timer_fd < 0) {
304 sr_err("Error creating timer fd");
308 tspec.it_interval.tv_sec = 0;
309 tspec.it_interval.tv_nsec = SR_HZ_TO_NS(devc->samplerate);
310 tspec.it_value = tspec.it_interval;
312 if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) {
313 sr_err("Failed to set timer");
314 close(devc->timer_fd);
318 devc->channel = g_io_channel_unix_new(devc->timer_fd);
319 g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
320 g_io_channel_set_encoding(devc->channel, NULL, NULL);
321 g_io_channel_set_buffered(devc->channel, FALSE);
323 sr_session_source_add_channel(sdi->session, devc->channel,
324 G_IO_IN | G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi);
326 std_session_send_df_header(sdi);
327 sr_sw_limits_acquisition_start(&devc->limits);
332 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
334 struct dev_context *devc;
338 dev_acquisition_close(sdi);
339 sr_session_source_remove_channel(sdi->session, devc->channel);
340 g_io_channel_shutdown(devc->channel, FALSE, NULL);
341 g_io_channel_unref(devc->channel);
342 devc->channel = NULL;
344 std_session_send_df_end(sdi);
346 if (devc->samples_missed > 0)
347 sr_warn("%" PRIu64 " samples missed", devc->samples_missed);
352 static struct sr_dev_driver baylibre_acme_driver_info = {
353 .name = "baylibre-acme",
354 .longname = "BayLibre ACME (Another Cute Measurement Equipment)",
357 .cleanup = std_cleanup,
359 .dev_list = std_dev_list,
360 .dev_clear = std_dev_clear,
361 .config_get = config_get,
362 .config_set = config_set,
363 .config_list = config_list,
364 .dev_open = std_dummy_dev_open,
365 .dev_close = std_dummy_dev_close,
366 .dev_acquisition_start = dev_acquisition_start,
367 .dev_acquisition_stop = dev_acquisition_stop,
370 SR_REGISTER_DEV_DRIVER(baylibre_acme_driver_info);