X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=7111097bb7657046d70c4f1efcf03e4cf39092cf;hb=HEAD;hp=cf82630adfca221cd73be987e85a611f3c2da439;hpb=9f54e0e84f93ca4773994d4ee3c2cf3d8989790b;p=libsigrok.git diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c deleted file mode 100644 index cf82630a..00000000 --- a/hardware/demo/demo.c +++ /dev/null @@ -1,783 +0,0 @@ -/* - * This file is part of the libsigrok project. - * - * Copyright (C) 2010 Uwe Hermann - * Copyright (C) 2011 Olivier Fauchon - * Copyright (C) 2012 Alexandru Gagniuc - * - * 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 2 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, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include -#include -#include -#ifdef _WIN32 -#include -#include -#define pipe(fds) _pipe(fds, 4096, _O_BINARY) -#endif -#include "libsigrok.h" -#include "libsigrok-internal.h" - -#define LOG_PREFIX "demo" - -#define DEFAULT_NUM_LOGIC_PROBES 8 -#define DEFAULT_NUM_ANALOG_PROBES 4 - -/* The size in bytes of chunks to send through the session bus. */ -#define LOGIC_BUFSIZE 4096 -/* Size of the analog pattern space per channel. */ -#define ANALOG_BUFSIZE 4096 - -#define ANALOG_AMPLITUDE 25 -#define ANALOG_SAMPLES_PER_PERIOD 20 - -/* Logic patterns we can generate. */ -enum { - /** - * Spells "sigrok" across 8 probes using '0's (with '1's as - * "background") when displayed using the 'bits' output format. - * The pattern is repeasted every 8 probes, shifted to the right - * in time by one bit. - */ - PATTERN_SIGROK, - - /** Pseudo-random values on all probes. */ - PATTERN_RANDOM, - - /** - * Incrementing number across 8 probes. The pattern is repeasted - * every 8 probes, shifted to the right in time by one bit. - */ - PATTERN_INC, - - /** All probes have a low logic state. */ - PATTERN_ALL_LOW, - - /** All probes have a high logic state. */ - PATTERN_ALL_HIGH, -}; - -/* Analog patterns we can generate. */ -enum { - /** - * Square wave. - */ - PATTERN_SQUARE, - PATTERN_SINE, - PATTERN_TRIANGLE, - PATTERN_SAWTOOTH, -}; - -static const char *logic_pattern_str[] = { - "sigrok", - "random", - "incremental", - "all-low", - "all-high", -}; - -static const char *analog_pattern_str[] = { - "square", - "sine", - "triangle", - "sawtooth", -}; - -struct analog_gen { - int pattern; - float pattern_data[ANALOG_BUFSIZE]; - unsigned int num_samples; - struct sr_datafeed_analog packet; -}; - -/* Private, per-device-instance driver context. */ -struct dev_context { - int pipe_fds[2]; - GIOChannel *channel; - uint64_t cur_samplerate; - uint64_t limit_samples; - uint64_t limit_msec; - uint64_t samples_counter; - int64_t starttime; - uint64_t step; - /* Logic */ - int32_t num_logic_probes; - unsigned int logic_unitsize; - /* There is only ever one logic probe group, so its pattern goes here. */ - uint8_t logic_pattern; - unsigned char logic_data[LOGIC_BUFSIZE]; - /* Analog */ - int32_t num_analog_probes; - GSList *analog_probe_groups; -}; - -static const int32_t scanopts[] = { - SR_CONF_NUM_LOGIC_PROBES, - SR_CONF_NUM_ANALOG_PROBES, -}; - -static const int devopts[] = { - SR_CONF_LOGIC_ANALYZER, - SR_CONF_DEMO_DEV, - SR_CONF_SAMPLERATE, - SR_CONF_LIMIT_SAMPLES, - SR_CONF_LIMIT_MSEC, -}; - -static const int devopts_pg[] = { - SR_CONF_PATTERN_MODE, -}; - -static const uint64_t samplerates[] = { - SR_HZ(1), - SR_GHZ(1), - SR_HZ(1), -}; - -static uint8_t pattern_sigrok[] = { - 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, - 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, - 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, - 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, - 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, - 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, -}; - -SR_PRIV struct sr_dev_driver demo_driver_info; -static struct sr_dev_driver *di = &demo_driver_info; - -static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); - - -static int dev_clear(void) -{ - return std_dev_clear(di, NULL); -} - -static int init(struct sr_context *sr_ctx) -{ - return std_init(sr_ctx, di, LOG_PREFIX); -} - -static void generate_analog_pattern(const struct sr_probe_group *probe_group, uint64_t sample_rate) -{ - struct analog_gen *ag; - double t, frequency; - float value; - unsigned int num_samples, i; - int last_end; - - ag = probe_group->priv; - num_samples = ANALOG_BUFSIZE / sizeof(float); - - sr_dbg("Generating %s pattern for probe group %s", - analog_pattern_str[ag->pattern], - probe_group->name); - - switch (ag->pattern) { - case PATTERN_SQUARE: - value = 5.0; - last_end = 0; - for (i = 0; i < num_samples; i++) { - if (i % 5 == 0) - value = -value; - if (i % 10 == 0) - last_end = i - 1; - ag->pattern_data[i] = value; - } - ag->num_samples = last_end; - break; - - case PATTERN_SINE: - frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; - - /* Make sure the number of samples we put out is an integer - * multiple of our period size */ - /* FIXME we actually need only one period. A ringbuffer would be - * usefull here.*/ - while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) - num_samples--; - - for (i = 0; i < num_samples; i++) { - t = (double) i / (double) sample_rate; - ag->pattern_data[i] = ANALOG_AMPLITUDE * - sin(2 * M_PI * frequency * t); - } - - ag->num_samples = num_samples; - break; - - case PATTERN_TRIANGLE: - frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; - - while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) - num_samples--; - - for (i = 0; i < num_samples; i++) { - t = (double) i / (double) sample_rate; - ag->pattern_data[i] = (2 * ANALOG_AMPLITUDE / M_PI) * - asin(sin(2 * M_PI * frequency * t)); - } - - ag->num_samples = num_samples; - break; - - case PATTERN_SAWTOOTH: - frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; - - while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) - num_samples--; - - for (i = 0; i < num_samples; i++) { - t = (double) i / (double) sample_rate; - ag->pattern_data[i] = 2 * ANALOG_AMPLITUDE * - ((t * frequency) - floor(0.5f + t * frequency)); - } - - ag->num_samples = num_samples; - break; - } -} - -static GSList *scan(GSList *options) -{ - struct drv_context *drvc; - struct dev_context *devc; - struct sr_dev_inst *sdi; - struct sr_probe *probe; - struct sr_probe_group *pg; - struct sr_config *src; - struct analog_gen *ag; - GSList *devices, *l; - int num_logic_probes, num_analog_probes, i; - char probe_name[16]; - - drvc = di->priv; - - num_logic_probes = DEFAULT_NUM_LOGIC_PROBES; - num_analog_probes = DEFAULT_NUM_ANALOG_PROBES; - for (l = options; l; l = l->next) { - src = l->data; - switch (src->key) { - case SR_CONF_NUM_LOGIC_PROBES: - num_logic_probes = g_variant_get_int32(src->data); - break; - case SR_CONF_NUM_ANALOG_PROBES: - num_analog_probes = g_variant_get_int32(src->data); - break; - } - } - - devices = NULL; - sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "Demo device", NULL, NULL); - if (!sdi) { - sr_err("Device instance creation failed."); - return NULL; - } - sdi->driver = di; - - if (!(devc = g_try_malloc(sizeof(struct dev_context)))) { - sr_err("Device context malloc failed."); - return NULL; - } - devc->cur_samplerate = SR_KHZ(200); - devc->limit_samples = 0; - devc->limit_msec = 0; - devc->step = 0; - devc->num_logic_probes = num_logic_probes; - devc->logic_unitsize = (devc->num_logic_probes + 7) / 8; - devc->logic_pattern = PATTERN_SIGROK; - devc->num_analog_probes = num_analog_probes; - devc->analog_probe_groups = NULL; - - /* Logic probes, all in one probe group. */ - if (!(pg = g_try_malloc(sizeof(struct sr_probe_group)))) - return NULL; - pg->name = g_strdup("Logic"); - pg->probes = NULL; - pg->priv = NULL; - for (i = 0; i < num_logic_probes; i++) { - sprintf(probe_name, "D%d", i); - if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, probe_name))) - return NULL; - sdi->probes = g_slist_append(sdi->probes, probe); - pg->probes = g_slist_append(pg->probes, probe); - } - sdi->probe_groups = g_slist_append(NULL, pg); - - /* Analog probes, probe groups and pattern generators. */ - for (i = 0; i < num_analog_probes; i++) { - sprintf(probe_name, "A%d", i); - if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, probe_name))) - return NULL; - sdi->probes = g_slist_append(sdi->probes, probe); - - /* Every analog probe gets its own probe group. */ - if (!(pg = g_try_malloc(sizeof(struct sr_probe_group)))) - return NULL; - pg->name = g_strdup(probe_name); - pg->probes = g_slist_append(NULL, probe); - - /* Every probe group gets a generator struct. */ - if (!(ag = g_try_malloc(sizeof(struct analog_gen)))) - return NULL; - ag->packet.probes = pg->probes; - ag->packet.mq = 0; - ag->packet.mqflags = 0; - ag->packet.unit = SR_UNIT_VOLT; - ag->packet.data = ag->pattern_data; - ag->pattern = PATTERN_SINE; - pg->priv = ag; - - sdi->probe_groups = g_slist_append(sdi->probe_groups, pg); - devc->analog_probe_groups = g_slist_append(devc->analog_probe_groups, pg); - } - - sdi->priv = devc; - devices = g_slist_append(devices, sdi); - drvc->instances = g_slist_append(drvc->instances, sdi); - - return devices; -} - -static GSList *dev_list(void) -{ - return ((struct drv_context *)(di->priv))->instances; -} - -static int dev_open(struct sr_dev_inst *sdi) -{ - sdi->status = SR_ST_ACTIVE; - - return SR_OK; -} - -static int dev_close(struct sr_dev_inst *sdi) -{ - sdi->status = SR_ST_INACTIVE; - - return SR_OK; -} - -static int cleanup(void) -{ - return dev_clear(); -} - -static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, - const struct sr_probe_group *probe_group) -{ - struct dev_context *devc; - struct sr_probe *probe; - struct analog_gen *ag; - int pattern; - - if (!sdi) - return SR_ERR_ARG; - - devc = sdi->priv; - switch (id) { - case SR_CONF_SAMPLERATE: - *data = g_variant_new_uint64(devc->cur_samplerate); - break; - case SR_CONF_LIMIT_SAMPLES: - *data = g_variant_new_uint64(devc->limit_samples); - break; - case SR_CONF_LIMIT_MSEC: - *data = g_variant_new_uint64(devc->limit_msec); - break; - case SR_CONF_PATTERN_MODE: - if (!probe_group) - return SR_ERR_PROBE_GROUP; - probe = probe_group->probes->data; - if (probe->type == SR_PROBE_LOGIC) { - pattern = devc->logic_pattern; - *data = g_variant_new_string(logic_pattern_str[pattern]); - } else if (probe->type == SR_PROBE_ANALOG) { - ag = probe_group->priv; - pattern = ag->pattern; - *data = g_variant_new_string(analog_pattern_str[pattern]); - } else - return SR_ERR_BUG; - break; - case SR_CONF_NUM_LOGIC_PROBES: - *data = g_variant_new_int32(devc->num_logic_probes); - break; - case SR_CONF_NUM_ANALOG_PROBES: - *data = g_variant_new_int32(devc->num_analog_probes); - break; - default: - return SR_ERR_NA; - } - - return SR_OK; -} - -static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, - const struct sr_probe_group *probe_group) -{ - struct dev_context *devc; - struct analog_gen *ag; - struct sr_probe *probe; - int pattern, ret; - unsigned int i; - const char *stropt; - - devc = sdi->priv; - - if (sdi->status != SR_ST_ACTIVE) - return SR_ERR_DEV_CLOSED; - - ret = SR_OK; - switch (id) { - case SR_CONF_SAMPLERATE: - devc->cur_samplerate = g_variant_get_uint64(data); - sr_dbg("Setting samplerate to %" PRIu64, devc->cur_samplerate); - break; - case SR_CONF_LIMIT_SAMPLES: - devc->limit_msec = 0; - devc->limit_samples = g_variant_get_uint64(data); - sr_dbg("Setting sample limit to %" PRIu64, devc->limit_samples); - break; - case SR_CONF_LIMIT_MSEC: - devc->limit_msec = g_variant_get_uint64(data); - devc->limit_samples = 0; - sr_dbg("Setting time limit to %" PRIu64"ms", devc->limit_msec); - break; - case SR_CONF_PATTERN_MODE: - if (!probe_group) - return SR_ERR_PROBE_GROUP; - stropt = g_variant_get_string(data, NULL); - probe = probe_group->probes->data; - pattern = -1; - if (probe->type == SR_PROBE_LOGIC) { - for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) { - if (!strcmp(stropt, logic_pattern_str[i])) { - pattern = i; - break; - } - } - if (pattern == -1) - return SR_ERR_ARG; - devc->logic_pattern = pattern; - - /* Might as well do this now, these are static. */ - if (pattern == PATTERN_ALL_LOW) - memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); - else if (pattern == PATTERN_ALL_HIGH) - memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); - sr_dbg("Setting logic pattern to %s", - logic_pattern_str[pattern]); - } else if (probe->type == SR_PROBE_ANALOG) { - for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) { - if (!strcmp(stropt, analog_pattern_str[i])) { - pattern = i; - break; - } - } - if (pattern == -1) - return SR_ERR_ARG; - sr_dbg("Setting analog pattern for probe group %s to %s", - probe_group->name, - analog_pattern_str[pattern]); - ag = probe_group->priv; - ag->pattern = pattern; - } else - return SR_ERR_BUG; - break; - default: - ret = SR_ERR_NA; - } - - return ret; -} - -static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, - const struct sr_probe_group *probe_group) -{ - struct sr_probe *probe; - GVariant *gvar; - GVariantBuilder gvb; - - (void)sdi; - - if (key == SR_CONF_SCAN_OPTIONS) { - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, - scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t)); - return SR_OK; - } - - if (!sdi) - return SR_ERR_ARG; - - if (!probe_group) { - switch (key) { - case SR_CONF_DEVICE_OPTIONS: - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, - devopts, ARRAY_SIZE(devopts), sizeof(int32_t)); - break; - case SR_CONF_SAMPLERATE: - g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); - gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, - ARRAY_SIZE(samplerates), sizeof(uint64_t)); - g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); - *data = g_variant_builder_end(&gvb); - break; - default: - return SR_ERR_NA; - } - } else { - probe = probe_group->probes->data; - switch (key) { - case SR_CONF_DEVICE_OPTIONS: - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, - devopts_pg, ARRAY_SIZE(devopts_pg), sizeof(int32_t)); - break; - case SR_CONF_PATTERN_MODE: - if (probe->type == SR_PROBE_LOGIC) - *data = g_variant_new_strv(logic_pattern_str, - ARRAY_SIZE(logic_pattern_str)); - else if (probe->type == SR_PROBE_ANALOG) - *data = g_variant_new_strv(analog_pattern_str, - ARRAY_SIZE(analog_pattern_str)); - else - return SR_ERR_BUG; - break; - default: - return SR_ERR_NA; - } - } - - return SR_OK; -} - -static void logic_generator(struct sr_dev_inst *sdi, uint64_t size) -{ - struct dev_context *devc; - uint64_t i, j; - uint8_t pat; - - devc = sdi->priv; - - switch (devc->logic_pattern) { - case PATTERN_SIGROK: - memset(devc->logic_data, 0x00, size); - for (i = 0; i < size; i += devc->logic_unitsize) { - for (j = 0; j < devc->logic_unitsize; j++) { - pat = pattern_sigrok[(devc->step + j) % sizeof(pattern_sigrok)] >> 1; - devc->logic_data[i + j] = ~pat; - } - devc->step++; - } - break; - case PATTERN_RANDOM: - for (i = 0; i < size; i++) - devc->logic_data[i] = (uint8_t)(rand() & 0xff); - break; - case PATTERN_INC: - for (i = 0; i < size; i++) { - for (j = 0; j < devc->logic_unitsize; j++) { - devc->logic_data[i + j] = devc->step; - } - devc->step++; - } - break; - case PATTERN_ALL_LOW: - case PATTERN_ALL_HIGH: - /* These were set when the pattern mode was selected. */ - break; - default: - sr_err("Unknown pattern: %d.", devc->logic_pattern); - break; - } -} - -/* Callback handling data */ -static int prepare_data(int fd, int revents, void *cb_data) -{ - struct sr_dev_inst *sdi; - struct dev_context *devc; - struct sr_datafeed_packet packet; - struct sr_datafeed_logic logic; - struct sr_probe_group *pg; - struct analog_gen *ag; - GSList *l; - uint64_t samples_to_send, expected_samplenum, analog_samples, sending_now; - int64_t time, elapsed; - - (void)fd; - (void)revents; - - sdi = cb_data; - devc = sdi->priv; - - /* How many "virtual" samples should we have collected by now? */ - time = g_get_monotonic_time(); - elapsed = time - devc->starttime; - expected_samplenum = elapsed * devc->cur_samplerate / 1000000; - /* Of those, how many do we still have to send? */ - samples_to_send = expected_samplenum - devc->samples_counter; - - if (devc->limit_samples) { - samples_to_send = MIN(samples_to_send, - devc->limit_samples - devc->samples_counter); - } - - while (samples_to_send > 0) { - sending_now = 0; - - /* Logic */ - if (devc->num_logic_probes > 0) { - sending_now = MIN(samples_to_send, - LOGIC_BUFSIZE / devc->logic_unitsize); - logic_generator(sdi, sending_now * devc->logic_unitsize); - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - logic.length = sending_now * devc->logic_unitsize; - logic.unitsize = devc->logic_unitsize; - logic.data = devc->logic_data; - sr_session_send(sdi, &packet); - } - - /* Analog, one probe at a time */ - if (devc->num_analog_probes > 0) { - sending_now = 0; - for (l = devc->analog_probe_groups; l; l = l->next) { - pg = l->data; - ag = pg->priv; - packet.type = SR_DF_ANALOG; - packet.payload = &ag->packet; - - /* FIXME we should make sure we output a whole - * period of data before we send out again the - * beginning of our buffer. A ring buffer would - * help here as well */ - - analog_samples = MIN(samples_to_send, ag->num_samples); - /* Whichever probe group gets there first. */ - sending_now = MAX(sending_now, analog_samples); - ag->packet.num_samples = analog_samples; - sr_session_send(sdi, &packet); - } - } - - samples_to_send -= sending_now; - devc->samples_counter += sending_now; - } - - if (devc->limit_samples && - devc->samples_counter >= devc->limit_samples) { - sr_info("Requested number of samples reached."); - dev_acquisition_stop(sdi, cb_data); - return TRUE; - } - - return TRUE; -} - -static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) -{ - GSList *l; - struct dev_context *devc; - - if (sdi->status != SR_ST_ACTIVE) - return SR_ERR_DEV_CLOSED; - - /* TODO: don't start without a sample limit set */ - devc = sdi->priv; - devc->samples_counter = 0; - - /* - * Setting two channels connected by a pipe is a remnant from when the - * demo driver generated data in a thread, and collected and sent the - * data in the main program loop. - * They are kept here because it provides a convenient way of setting - * up a timeout-based polling mechanism. - */ - if (pipe(devc->pipe_fds)) { - sr_err("%s: pipe() failed", __func__); - return SR_ERR; - } - - for (l = devc->analog_probe_groups; l; l = l->next) { - generate_analog_pattern(l->data, devc->cur_samplerate); - } - - devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]); - - g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL); - - /* Set channel encoding to binary (default is UTF-8). */ - g_io_channel_set_encoding(devc->channel, NULL, NULL); - - /* Make channels to unbuffered. */ - g_io_channel_set_buffered(devc->channel, FALSE); - - sr_session_source_add_channel(devc->channel, G_IO_IN | G_IO_ERR, - 40, prepare_data, (void *)sdi); - - /* Send header packet to the session bus. */ - std_session_send_df_header(cb_data, LOG_PREFIX); - - /* We use this timestamp to decide how many more samples to send. */ - devc->starttime = g_get_monotonic_time(); - - return SR_OK; -} - -static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) -{ - struct dev_context *devc; - struct sr_datafeed_packet packet; - - (void)cb_data; - - devc = sdi->priv; - sr_dbg("Stopping aquisition."); - - sr_session_source_remove_channel(devc->channel); - g_io_channel_shutdown(devc->channel, FALSE, NULL); - g_io_channel_unref(devc->channel); - devc->channel = NULL; - - /* Send last packet. */ - packet.type = SR_DF_END; - sr_session_send(sdi, &packet); - - return SR_OK; -} - -SR_PRIV struct sr_dev_driver demo_driver_info = { - .name = "demo", - .longname = "Demo driver and pattern generator", - .api_version = 1, - .init = init, - .cleanup = cleanup, - .scan = scan, - .dev_list = dev_list, - .dev_clear = dev_clear, - .config_get = config_get, - .config_set = config_set, - .config_list = config_list, - .dev_open = dev_open, - .dev_close = dev_close, - .dev_acquisition_start = dev_acquisition_start, - .dev_acquisition_stop = dev_acquisition_stop, - .priv = NULL, -};