From: Uwe Hermann Date: Sun, 18 Sep 2016 23:48:56 +0000 (+0200) Subject: demo: File naming consistency changes. X-Git-Tag: libsigrok-0.5.0~212 X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=ba508e22d4e5ac358489e24b29f458c5bc1fb892;p=libsigrok.git demo: File naming consistency changes. --- diff --git a/Makefile.am b/Makefile.am index a6020193..7d22a60f 100644 --- a/Makefile.am +++ b/Makefile.am @@ -267,7 +267,9 @@ src_libdrivers_la_SOURCES += \ endif if HW_DEMO src_libdrivers_la_SOURCES += \ - src/hardware/demo/demo.c + src/hardware/demo/protocol.h \ + src/hardware/demo/protocol.c \ + src/hardware/demo/api.c endif if HW_DEREE_DE5000 src_libdrivers_la_SOURCES += \ diff --git a/src/hardware/demo/api.c b/src/hardware/demo/api.c new file mode 100644 index 00000000..141b69d5 --- /dev/null +++ b/src/hardware/demo/api.c @@ -0,0 +1,507 @@ +/* + * This file is part of the libsigrok project. + * + * Copyright (C) 2010 Uwe Hermann + * Copyright (C) 2011 Olivier Fauchon + * Copyright (C) 2012 Alexandru Gagniuc + * Copyright (C) 2015 Bartosz Golaszewski + * + * 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 +#include +#include "libsigrok-internal.h" +#include "protocol.h" + +#define DEFAULT_NUM_LOGIC_CHANNELS 8 +#define DEFAULT_NUM_ANALOG_CHANNELS 4 + +#define DEFAULT_ANALOG_AMPLITUDE 10 + +static const char *logic_pattern_str[] = { + "sigrok", + "random", + "incremental", + "all-low", + "all-high", +}; + +static const uint32_t drvopts[] = { + SR_CONF_DEMO_DEV, + SR_CONF_LOGIC_ANALYZER, + SR_CONF_OSCILLOSCOPE, +}; + +static const uint32_t scanopts[] = { + SR_CONF_NUM_LOGIC_CHANNELS, + SR_CONF_NUM_ANALOG_CHANNELS, +}; + +static const uint32_t devopts[] = { + SR_CONF_CONTINUOUS, + SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, + SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, + SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, + SR_CONF_AVERAGING | SR_CONF_GET | SR_CONF_SET, + SR_CONF_AVG_SAMPLES | SR_CONF_GET | SR_CONF_SET, +}; + +static const uint32_t devopts_cg_logic[] = { + SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, +}; + +static const uint32_t devopts_cg_analog_group[] = { + SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, +}; + +static const uint32_t devopts_cg_analog_channel[] = { + SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, + SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, +}; + +static const uint64_t samplerates[] = { + SR_HZ(1), + SR_GHZ(1), + SR_HZ(1), +}; + +static GSList *scan(struct sr_dev_driver *di, GSList *options) +{ + struct dev_context *devc; + struct sr_dev_inst *sdi; + struct sr_channel *ch; + struct sr_channel_group *cg, *acg; + struct sr_config *src; + struct analog_gen *ag; + GSList *l; + int num_logic_channels, num_analog_channels, pattern, i; + char channel_name[16]; + + num_logic_channels = DEFAULT_NUM_LOGIC_CHANNELS; + num_analog_channels = DEFAULT_NUM_ANALOG_CHANNELS; + for (l = options; l; l = l->next) { + src = l->data; + switch (src->key) { + case SR_CONF_NUM_LOGIC_CHANNELS: + num_logic_channels = g_variant_get_int32(src->data); + break; + case SR_CONF_NUM_ANALOG_CHANNELS: + num_analog_channels = g_variant_get_int32(src->data); + break; + } + } + + sdi = g_malloc0(sizeof(struct sr_dev_inst)); + sdi->status = SR_ST_INACTIVE; + sdi->model = g_strdup("Demo device"); + + devc = g_malloc0(sizeof(struct dev_context)); + devc->cur_samplerate = SR_KHZ(200); + devc->num_logic_channels = num_logic_channels; + devc->logic_unitsize = (devc->num_logic_channels + 7) / 8; + devc->logic_pattern = PATTERN_SIGROK; + devc->num_analog_channels = num_analog_channels; + + if (num_logic_channels > 0) { + /* Logic channels, all in one channel group. */ + cg = g_malloc0(sizeof(struct sr_channel_group)); + cg->name = g_strdup("Logic"); + for (i = 0; i < num_logic_channels; i++) { + sprintf(channel_name, "D%d", i); + ch = sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name); + cg->channels = g_slist_append(cg->channels, ch); + } + sdi->channel_groups = g_slist_append(NULL, cg); + } + + /* Analog channels, channel groups and pattern generators. */ + if (num_analog_channels > 0) { + pattern = 0; + /* An "Analog" channel group with all analog channels in it. */ + acg = g_malloc0(sizeof(struct sr_channel_group)); + acg->name = g_strdup("Analog"); + sdi->channel_groups = g_slist_append(sdi->channel_groups, acg); + + devc->ch_ag = g_hash_table_new(g_direct_hash, g_direct_equal); + for (i = 0; i < num_analog_channels; i++) { + snprintf(channel_name, 16, "A%d", i); + ch = sr_channel_new(sdi, i + num_logic_channels, SR_CHANNEL_ANALOG, + TRUE, channel_name); + acg->channels = g_slist_append(acg->channels, ch); + + /* Every analog channel gets its own channel group as well. */ + cg = g_malloc0(sizeof(struct sr_channel_group)); + cg->name = g_strdup(channel_name); + cg->channels = g_slist_append(NULL, ch); + sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); + + /* Every channel gets a generator struct. */ + ag = g_malloc(sizeof(struct analog_gen)); + ag->amplitude = DEFAULT_ANALOG_AMPLITUDE; + sr_analog_init(&ag->packet, &ag->encoding, &ag->meaning, &ag->spec, 2); + ag->packet.meaning->channels = cg->channels; + ag->packet.meaning->mq = 0; + ag->packet.meaning->mqflags = 0; + ag->packet.meaning->unit = SR_UNIT_VOLT; + ag->packet.data = ag->pattern_data; + ag->pattern = pattern; + ag->avg_val = 0.0f; + ag->num_avgs = 0; + g_hash_table_insert(devc->ch_ag, ch, ag); + + if (++pattern == ARRAY_SIZE(analog_pattern_str)) + pattern = 0; + } + } + + sdi->priv = devc; + + return std_scan_complete(di, g_slist_append(NULL, sdi)); +} + +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 void clear_helper(void *priv) +{ + struct dev_context *devc; + GHashTableIter iter; + void *value; + + devc = priv; + + /* Analog generators. */ + g_hash_table_iter_init(&iter, devc->ch_ag); + while (g_hash_table_iter_next(&iter, NULL, &value)) + g_free(value); + g_hash_table_unref(devc->ch_ag); + g_free(devc); +} + +static int dev_clear(const struct sr_dev_driver *di) +{ + return std_dev_clear(di, clear_helper); +} + +static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, + const struct sr_channel_group *cg) +{ + struct dev_context *devc; + struct sr_channel *ch; + struct analog_gen *ag; + int pattern; + + if (!sdi) + return SR_ERR_ARG; + + devc = sdi->priv; + switch (key) { + 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_AVERAGING: + *data = g_variant_new_boolean(devc->avg); + break; + case SR_CONF_AVG_SAMPLES: + *data = g_variant_new_uint64(devc->avg_samples); + break; + case SR_CONF_PATTERN_MODE: + if (!cg) + return SR_ERR_CHANNEL_GROUP; + /* Any channel in the group will do. */ + ch = cg->channels->data; + if (ch->type == SR_CHANNEL_LOGIC) { + pattern = devc->logic_pattern; + *data = g_variant_new_string(logic_pattern_str[pattern]); + } else if (ch->type == SR_CHANNEL_ANALOG) { + ag = g_hash_table_lookup(devc->ch_ag, ch); + pattern = ag->pattern; + *data = g_variant_new_string(analog_pattern_str[pattern]); + } else + return SR_ERR_BUG; + break; + case SR_CONF_AMPLITUDE: + if (!cg) + return SR_ERR_CHANNEL_GROUP; + /* Any channel in the group will do. */ + ch = cg->channels->data; + if (ch->type != SR_CHANNEL_ANALOG) + return SR_ERR_ARG; + ag = g_hash_table_lookup(devc->ch_ag, ch); + *data = g_variant_new_double(ag->amplitude); + break; + default: + return SR_ERR_NA; + } + + return SR_OK; +} + +static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, + const struct sr_channel_group *cg) +{ + struct dev_context *devc; + struct analog_gen *ag; + struct sr_channel *ch; + GSList *l; + int logic_pattern, analog_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 (key) { + case SR_CONF_SAMPLERATE: + devc->cur_samplerate = g_variant_get_uint64(data); + break; + case SR_CONF_LIMIT_SAMPLES: + devc->limit_msec = 0; + devc->limit_samples = g_variant_get_uint64(data); + break; + case SR_CONF_LIMIT_MSEC: + devc->limit_msec = g_variant_get_uint64(data); + devc->limit_samples = 0; + break; + case SR_CONF_AVERAGING: + devc->avg = g_variant_get_boolean(data); + sr_dbg("%s averaging", devc->avg ? "Enabling" : "Disabling"); + break; + case SR_CONF_AVG_SAMPLES: + devc->avg_samples = g_variant_get_uint64(data); + sr_dbg("Setting averaging rate to %" PRIu64, devc->avg_samples); + break; + case SR_CONF_PATTERN_MODE: + if (!cg) + return SR_ERR_CHANNEL_GROUP; + stropt = g_variant_get_string(data, NULL); + logic_pattern = analog_pattern = -1; + for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) { + if (!strcmp(stropt, logic_pattern_str[i])) { + logic_pattern = i; + break; + } + } + for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) { + if (!strcmp(stropt, analog_pattern_str[i])) { + analog_pattern = i; + break; + } + } + if (logic_pattern == -1 && analog_pattern == -1) + return SR_ERR_ARG; + for (l = cg->channels; l; l = l->next) { + ch = l->data; + if (ch->type == SR_CHANNEL_LOGIC) { + if (logic_pattern == -1) + return SR_ERR_ARG; + sr_dbg("Setting logic pattern to %s", + logic_pattern_str[logic_pattern]); + devc->logic_pattern = logic_pattern; + /* Might as well do this now, these are static. */ + if (logic_pattern == PATTERN_ALL_LOW) + memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); + else if (logic_pattern == PATTERN_ALL_HIGH) + memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); + } else if (ch->type == SR_CHANNEL_ANALOG) { + if (analog_pattern == -1) + return SR_ERR_ARG; + sr_dbg("Setting analog pattern for channel %s to %s", + ch->name, analog_pattern_str[analog_pattern]); + ag = g_hash_table_lookup(devc->ch_ag, ch); + ag->pattern = analog_pattern; + } else + return SR_ERR_BUG; + } + break; + case SR_CONF_AMPLITUDE: + if (!cg) + return SR_ERR_CHANNEL_GROUP; + for (l = cg->channels; l; l = l->next) { + ch = l->data; + if (ch->type != SR_CHANNEL_ANALOG) + return SR_ERR_ARG; + ag = g_hash_table_lookup(devc->ch_ag, ch); + ag->amplitude = g_variant_get_double(data); + } + break; + default: + ret = SR_ERR_NA; + } + + return ret; +} + +static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, + const struct sr_channel_group *cg) +{ + struct sr_channel *ch; + GVariant *gvar; + GVariantBuilder gvb; + + if (key == SR_CONF_SCAN_OPTIONS) { + *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, + scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); + return SR_OK; + } + + if (key == SR_CONF_DEVICE_OPTIONS && !sdi) { + *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, + drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); + return SR_OK; + } + + if (!sdi) + return SR_ERR_ARG; + + if (!cg) { + switch (key) { + case SR_CONF_DEVICE_OPTIONS: + *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, + devopts, ARRAY_SIZE(devopts), sizeof(uint32_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 { + ch = cg->channels->data; + switch (key) { + case SR_CONF_DEVICE_OPTIONS: + if (ch->type == SR_CHANNEL_LOGIC) + *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, + devopts_cg_logic, ARRAY_SIZE(devopts_cg_logic), + sizeof(uint32_t)); + else if (ch->type == SR_CHANNEL_ANALOG) { + if (strcmp(cg->name, "Analog") == 0) + *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, + devopts_cg_analog_group, ARRAY_SIZE(devopts_cg_analog_group), + sizeof(uint32_t)); + else + *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, + devopts_cg_analog_channel, ARRAY_SIZE(devopts_cg_analog_channel), + sizeof(uint32_t)); + } + else + return SR_ERR_BUG; + break; + case SR_CONF_PATTERN_MODE: + /* The analog group (with all 4 channels) shall not have a pattern property. */ + if (strcmp(cg->name, "Analog") == 0) + return SR_ERR_NA; + + if (ch->type == SR_CHANNEL_LOGIC) + *data = g_variant_new_strv(logic_pattern_str, + ARRAY_SIZE(logic_pattern_str)); + else if (ch->type == SR_CHANNEL_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 int dev_acquisition_start(const struct sr_dev_inst *sdi) +{ + struct dev_context *devc; + GHashTableIter iter; + void *value; + + if (sdi->status != SR_ST_ACTIVE) + return SR_ERR_DEV_CLOSED; + + devc = sdi->priv; + devc->sent_samples = 0; + + g_hash_table_iter_init(&iter, devc->ch_ag); + while (g_hash_table_iter_next(&iter, NULL, &value)) + demo_generate_analog_pattern(value, devc->cur_samplerate); + + sr_session_source_add(sdi->session, -1, 0, 100, + demo_prepare_data, (struct sr_dev_inst *)sdi); + + std_session_send_df_header(sdi); + + /* We use this timestamp to decide how many more samples to send. */ + devc->start_us = g_get_monotonic_time(); + devc->spent_us = 0; + + return SR_OK; +} + +static int dev_acquisition_stop(struct sr_dev_inst *sdi) +{ + sr_dbg("Stopping acquisition."); + sr_session_source_remove(sdi->session, -1); + std_session_send_df_end(sdi); + + return SR_OK; +} + +static struct sr_dev_driver demo_driver_info = { + .name = "demo", + .longname = "Demo driver and pattern generator", + .api_version = 1, + .init = std_init, + .cleanup = std_cleanup, + .scan = scan, + .dev_list = std_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, + .context = NULL, +}; +SR_REGISTER_DEV_DRIVER(demo_driver_info); diff --git a/src/hardware/demo/demo.c b/src/hardware/demo/demo.c deleted file mode 100644 index a1f8c6bf..00000000 --- a/src/hardware/demo/demo.c +++ /dev/null @@ -1,891 +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 - * Copyright (C) 2015 Bartosz Golaszewski - * - * 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 -#include -#include "libsigrok-internal.h" - -#define LOG_PREFIX "demo" - -#define DEFAULT_NUM_LOGIC_CHANNELS 8 -#define DEFAULT_NUM_ANALOG_CHANNELS 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 DEFAULT_ANALOG_AMPLITUDE 10 -#define ANALOG_SAMPLES_PER_PERIOD 20 - -/* Logic patterns we can generate. */ -enum { - /** - * Spells "sigrok" across 8 channels using '0's (with '1's as - * "background") when displayed using the 'bits' output format. - * The pattern is repeated every 8 channels, shifted to the right - * in time by one bit. - */ - PATTERN_SIGROK, - - /** Pseudo-random values on all channels. */ - PATTERN_RANDOM, - - /** - * Incrementing number across 8 channels. The pattern is repeated - * every 8 channels, shifted to the right in time by one bit. - */ - PATTERN_INC, - - /** All channels have a low logic state. */ - PATTERN_ALL_LOW, - - /** All channels 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 amplitude; - float pattern_data[ANALOG_BUFSIZE]; - unsigned int num_samples; - struct sr_datafeed_analog packet; - struct sr_analog_encoding encoding; - struct sr_analog_meaning meaning; - struct sr_analog_spec spec; - float avg_val; /* Average value */ - unsigned num_avgs; /* Number of samples averaged */ -}; - -/* Private, per-device-instance driver context. */ -struct dev_context { - uint64_t cur_samplerate; - uint64_t limit_samples; - uint64_t limit_msec; - uint64_t sent_samples; - int64_t start_us; - int64_t spent_us; - uint64_t step; - /* Logic */ - int32_t num_logic_channels; - unsigned int logic_unitsize; - /* There is only ever one logic channel group, so its pattern goes here. */ - uint8_t logic_pattern; - unsigned char logic_data[LOGIC_BUFSIZE]; - /* Analog */ - int32_t num_analog_channels; - GHashTable *ch_ag; - gboolean avg; /* True if averaging is enabled */ - uint64_t avg_samples; -}; - -static const uint32_t drvopts[] = { - SR_CONF_DEMO_DEV, - SR_CONF_LOGIC_ANALYZER, - SR_CONF_OSCILLOSCOPE, -}; - -static const uint32_t scanopts[] = { - SR_CONF_NUM_LOGIC_CHANNELS, - SR_CONF_NUM_ANALOG_CHANNELS, -}; - -static const uint32_t devopts[] = { - SR_CONF_CONTINUOUS, - SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, - SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, - SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, - SR_CONF_AVERAGING | SR_CONF_GET | SR_CONF_SET, - SR_CONF_AVG_SAMPLES | SR_CONF_GET | SR_CONF_SET, -}; - -static const uint32_t devopts_cg_logic[] = { - SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, -}; - -static const uint32_t devopts_cg_analog_group[] = { - SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, -}; - -static const uint32_t devopts_cg_analog_channel[] = { - SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, - SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, -}; - -static const uint64_t samplerates[] = { - SR_HZ(1), - SR_GHZ(1), - SR_HZ(1), -}; - -static const 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, -}; - -static int dev_acquisition_stop(struct sr_dev_inst *sdi); - -static void generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate) -{ - double t, frequency; - float value; - unsigned int num_samples, i; - int last_end; - - sr_dbg("Generating %s pattern.", analog_pattern_str[ag->pattern]); - - num_samples = ANALOG_BUFSIZE / sizeof(float); - - switch (ag->pattern) { - case PATTERN_SQUARE: - value = ag->amplitude; - last_end = 0; - for (i = 0; i < num_samples; i++) { - if (i % 5 == 0) - value = -value; - if (i % 10 == 0) - last_end = i; - ag->pattern_data[i] = value; - } - ag->num_samples = last_end; - break; - case PATTERN_SINE: - frequency = (double) 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 - * useful 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] = ag->amplitude * - sin(2 * G_PI * frequency * t); - } - - ag->num_samples = num_samples; - break; - case PATTERN_TRIANGLE: - frequency = (double) 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 * ag->amplitude / G_PI) * - asin(sin(2 * G_PI * frequency * t)); - } - - ag->num_samples = num_samples; - break; - case PATTERN_SAWTOOTH: - frequency = (double) 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 * ag->amplitude * - ((t * frequency) - floor(0.5f + t * frequency)); - } - - ag->num_samples = num_samples; - break; - } -} - -static GSList *scan(struct sr_dev_driver *di, GSList *options) -{ - struct dev_context *devc; - struct sr_dev_inst *sdi; - struct sr_channel *ch; - struct sr_channel_group *cg, *acg; - struct sr_config *src; - struct analog_gen *ag; - GSList *l; - int num_logic_channels, num_analog_channels, pattern, i; - char channel_name[16]; - - num_logic_channels = DEFAULT_NUM_LOGIC_CHANNELS; - num_analog_channels = DEFAULT_NUM_ANALOG_CHANNELS; - for (l = options; l; l = l->next) { - src = l->data; - switch (src->key) { - case SR_CONF_NUM_LOGIC_CHANNELS: - num_logic_channels = g_variant_get_int32(src->data); - break; - case SR_CONF_NUM_ANALOG_CHANNELS: - num_analog_channels = g_variant_get_int32(src->data); - break; - } - } - - sdi = g_malloc0(sizeof(struct sr_dev_inst)); - sdi->status = SR_ST_INACTIVE; - sdi->model = g_strdup("Demo device"); - - devc = g_malloc0(sizeof(struct dev_context)); - devc->cur_samplerate = SR_KHZ(200); - devc->num_logic_channels = num_logic_channels; - devc->logic_unitsize = (devc->num_logic_channels + 7) / 8; - devc->logic_pattern = PATTERN_SIGROK; - devc->num_analog_channels = num_analog_channels; - - if (num_logic_channels > 0) { - /* Logic channels, all in one channel group. */ - cg = g_malloc0(sizeof(struct sr_channel_group)); - cg->name = g_strdup("Logic"); - for (i = 0; i < num_logic_channels; i++) { - sprintf(channel_name, "D%d", i); - ch = sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name); - cg->channels = g_slist_append(cg->channels, ch); - } - sdi->channel_groups = g_slist_append(NULL, cg); - } - - /* Analog channels, channel groups and pattern generators. */ - if (num_analog_channels > 0) { - pattern = 0; - /* An "Analog" channel group with all analog channels in it. */ - acg = g_malloc0(sizeof(struct sr_channel_group)); - acg->name = g_strdup("Analog"); - sdi->channel_groups = g_slist_append(sdi->channel_groups, acg); - - devc->ch_ag = g_hash_table_new(g_direct_hash, g_direct_equal); - for (i = 0; i < num_analog_channels; i++) { - snprintf(channel_name, 16, "A%d", i); - ch = sr_channel_new(sdi, i + num_logic_channels, SR_CHANNEL_ANALOG, - TRUE, channel_name); - acg->channels = g_slist_append(acg->channels, ch); - - /* Every analog channel gets its own channel group as well. */ - cg = g_malloc0(sizeof(struct sr_channel_group)); - cg->name = g_strdup(channel_name); - cg->channels = g_slist_append(NULL, ch); - sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); - - /* Every channel gets a generator struct. */ - ag = g_malloc(sizeof(struct analog_gen)); - ag->amplitude = DEFAULT_ANALOG_AMPLITUDE; - sr_analog_init(&ag->packet, &ag->encoding, &ag->meaning, &ag->spec, 2); - ag->packet.meaning->channels = cg->channels; - ag->packet.meaning->mq = 0; - ag->packet.meaning->mqflags = 0; - ag->packet.meaning->unit = SR_UNIT_VOLT; - ag->packet.data = ag->pattern_data; - ag->pattern = pattern; - ag->avg_val = 0.0f; - ag->num_avgs = 0; - g_hash_table_insert(devc->ch_ag, ch, ag); - - if (++pattern == ARRAY_SIZE(analog_pattern_str)) - pattern = 0; - } - } - - sdi->priv = devc; - - return std_scan_complete(di, g_slist_append(NULL, sdi)); -} - -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 void clear_helper(void *priv) -{ - struct dev_context *devc; - GHashTableIter iter; - void *value; - - devc = priv; - - /* Analog generators. */ - g_hash_table_iter_init(&iter, devc->ch_ag); - while (g_hash_table_iter_next(&iter, NULL, &value)) - g_free(value); - g_hash_table_unref(devc->ch_ag); - g_free(devc); -} - -static int dev_clear(const struct sr_dev_driver *di) -{ - return std_dev_clear(di, clear_helper); -} - -static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, - const struct sr_channel_group *cg) -{ - struct dev_context *devc; - struct sr_channel *ch; - struct analog_gen *ag; - int pattern; - - if (!sdi) - return SR_ERR_ARG; - - devc = sdi->priv; - switch (key) { - 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_AVERAGING: - *data = g_variant_new_boolean(devc->avg); - break; - case SR_CONF_AVG_SAMPLES: - *data = g_variant_new_uint64(devc->avg_samples); - break; - case SR_CONF_PATTERN_MODE: - if (!cg) - return SR_ERR_CHANNEL_GROUP; - /* Any channel in the group will do. */ - ch = cg->channels->data; - if (ch->type == SR_CHANNEL_LOGIC) { - pattern = devc->logic_pattern; - *data = g_variant_new_string(logic_pattern_str[pattern]); - } else if (ch->type == SR_CHANNEL_ANALOG) { - ag = g_hash_table_lookup(devc->ch_ag, ch); - pattern = ag->pattern; - *data = g_variant_new_string(analog_pattern_str[pattern]); - } else - return SR_ERR_BUG; - break; - case SR_CONF_AMPLITUDE: - if (!cg) - return SR_ERR_CHANNEL_GROUP; - /* Any channel in the group will do. */ - ch = cg->channels->data; - if (ch->type != SR_CHANNEL_ANALOG) - return SR_ERR_ARG; - ag = g_hash_table_lookup(devc->ch_ag, ch); - *data = g_variant_new_double(ag->amplitude); - break; - default: - return SR_ERR_NA; - } - - return SR_OK; -} - -static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, - const struct sr_channel_group *cg) -{ - struct dev_context *devc; - struct analog_gen *ag; - struct sr_channel *ch; - GSList *l; - int logic_pattern, analog_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 (key) { - case SR_CONF_SAMPLERATE: - devc->cur_samplerate = g_variant_get_uint64(data); - break; - case SR_CONF_LIMIT_SAMPLES: - devc->limit_msec = 0; - devc->limit_samples = g_variant_get_uint64(data); - break; - case SR_CONF_LIMIT_MSEC: - devc->limit_msec = g_variant_get_uint64(data); - devc->limit_samples = 0; - break; - case SR_CONF_AVERAGING: - devc->avg = g_variant_get_boolean(data); - sr_dbg("%s averaging", devc->avg ? "Enabling" : "Disabling"); - break; - case SR_CONF_AVG_SAMPLES: - devc->avg_samples = g_variant_get_uint64(data); - sr_dbg("Setting averaging rate to %" PRIu64, devc->avg_samples); - break; - case SR_CONF_PATTERN_MODE: - if (!cg) - return SR_ERR_CHANNEL_GROUP; - stropt = g_variant_get_string(data, NULL); - logic_pattern = analog_pattern = -1; - for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) { - if (!strcmp(stropt, logic_pattern_str[i])) { - logic_pattern = i; - break; - } - } - for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) { - if (!strcmp(stropt, analog_pattern_str[i])) { - analog_pattern = i; - break; - } - } - if (logic_pattern == -1 && analog_pattern == -1) - return SR_ERR_ARG; - for (l = cg->channels; l; l = l->next) { - ch = l->data; - if (ch->type == SR_CHANNEL_LOGIC) { - if (logic_pattern == -1) - return SR_ERR_ARG; - sr_dbg("Setting logic pattern to %s", - logic_pattern_str[logic_pattern]); - devc->logic_pattern = logic_pattern; - /* Might as well do this now, these are static. */ - if (logic_pattern == PATTERN_ALL_LOW) - memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); - else if (logic_pattern == PATTERN_ALL_HIGH) - memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); - } else if (ch->type == SR_CHANNEL_ANALOG) { - if (analog_pattern == -1) - return SR_ERR_ARG; - sr_dbg("Setting analog pattern for channel %s to %s", - ch->name, analog_pattern_str[analog_pattern]); - ag = g_hash_table_lookup(devc->ch_ag, ch); - ag->pattern = analog_pattern; - } else - return SR_ERR_BUG; - } - break; - case SR_CONF_AMPLITUDE: - if (!cg) - return SR_ERR_CHANNEL_GROUP; - for (l = cg->channels; l; l = l->next) { - ch = l->data; - if (ch->type != SR_CHANNEL_ANALOG) - return SR_ERR_ARG; - ag = g_hash_table_lookup(devc->ch_ag, ch); - ag->amplitude = g_variant_get_double(data); - } - break; - default: - ret = SR_ERR_NA; - } - - return ret; -} - -static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, - const struct sr_channel_group *cg) -{ - struct sr_channel *ch; - GVariant *gvar; - GVariantBuilder gvb; - - if (key == SR_CONF_SCAN_OPTIONS) { - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, - scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); - return SR_OK; - } - - if (key == SR_CONF_DEVICE_OPTIONS && !sdi) { - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, - drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); - return SR_OK; - } - - if (!sdi) - return SR_ERR_ARG; - - if (!cg) { - switch (key) { - case SR_CONF_DEVICE_OPTIONS: - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, - devopts, ARRAY_SIZE(devopts), sizeof(uint32_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 { - ch = cg->channels->data; - switch (key) { - case SR_CONF_DEVICE_OPTIONS: - if (ch->type == SR_CHANNEL_LOGIC) - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, - devopts_cg_logic, ARRAY_SIZE(devopts_cg_logic), - sizeof(uint32_t)); - else if (ch->type == SR_CHANNEL_ANALOG) { - if (strcmp(cg->name, "Analog") == 0) - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, - devopts_cg_analog_group, ARRAY_SIZE(devopts_cg_analog_group), - sizeof(uint32_t)); - else - *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, - devopts_cg_analog_channel, ARRAY_SIZE(devopts_cg_analog_channel), - sizeof(uint32_t)); - } - else - return SR_ERR_BUG; - break; - case SR_CONF_PATTERN_MODE: - /* The analog group (with all 4 channels) shall not have a pattern property. */ - if (strcmp(cg->name, "Analog") == 0) - return SR_ERR_NA; - - if (ch->type == SR_CHANNEL_LOGIC) - *data = g_variant_new_strv(logic_pattern_str, - ARRAY_SIZE(logic_pattern_str)); - else if (ch->type == SR_CHANNEL_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; - } -} - -static void send_analog_packet(struct analog_gen *ag, - struct sr_dev_inst *sdi, uint64_t *analog_sent, - uint64_t analog_pos, uint64_t analog_todo) -{ - struct sr_datafeed_packet packet; - struct dev_context *devc; - uint64_t sending_now, to_avg; - int ag_pattern_pos; - unsigned int i; - - devc = sdi->priv; - packet.type = SR_DF_ANALOG; - packet.payload = &ag->packet; - - if (!devc->avg) { - ag_pattern_pos = analog_pos % ag->num_samples; - sending_now = MIN(analog_todo, ag->num_samples-ag_pattern_pos); - ag->packet.data = ag->pattern_data + ag_pattern_pos; - ag->packet.num_samples = sending_now; - sr_session_send(sdi, &packet); - - /* Whichever channel group gets there first. */ - *analog_sent = MAX(*analog_sent, sending_now); - } else { - ag_pattern_pos = analog_pos % ag->num_samples; - to_avg = MIN(analog_todo, ag->num_samples-ag_pattern_pos); - - for (i = 0; i < to_avg; i++) { - ag->avg_val = (ag->avg_val + - *(ag->pattern_data + - ag_pattern_pos + i)) / 2; - ag->num_avgs++; - /* Time to send averaged data? */ - if (devc->avg_samples > 0 && - ag->num_avgs >= devc->avg_samples) - goto do_send; - } - - if (devc->avg_samples == 0) { - /* We're averaging all the samples, so wait with - * sending until the very end. - */ - *analog_sent = ag->num_avgs; - return; - } - -do_send: - ag->packet.data = &ag->avg_val; - ag->packet.num_samples = 1; - - sr_session_send(sdi, &packet); - *analog_sent = ag->num_avgs; - - ag->num_avgs = 0; - ag->avg_val = 0.0f; - } -} - -/* 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 analog_gen *ag; - GHashTableIter iter; - void *value; - uint64_t samples_todo, logic_done, analog_done, analog_sent, sending_now; - int64_t elapsed_us, limit_us, todo_us; - - (void)fd; - (void)revents; - - sdi = cb_data; - devc = sdi->priv; - - /* Just in case. */ - if (devc->cur_samplerate <= 0 - || (devc->num_logic_channels <= 0 - && devc->num_analog_channels <= 0)) { - dev_acquisition_stop(sdi); - return G_SOURCE_CONTINUE; - } - - /* What time span should we send samples for? */ - elapsed_us = g_get_monotonic_time() - devc->start_us; - limit_us = 1000 * devc->limit_msec; - if (limit_us > 0 && limit_us < elapsed_us) - todo_us = MAX(0, limit_us - devc->spent_us); - else - todo_us = MAX(0, elapsed_us - devc->spent_us); - - /* How many samples are outstanding since the last round? */ - samples_todo = (todo_us * devc->cur_samplerate + G_USEC_PER_SEC - 1) - / G_USEC_PER_SEC; - if (devc->limit_samples > 0) { - if (devc->limit_samples < devc->sent_samples) - samples_todo = 0; - else if (devc->limit_samples - devc->sent_samples < samples_todo) - samples_todo = devc->limit_samples - devc->sent_samples; - } - /* Calculate the actual time covered by this run back from the sample - * count, rounded towards zero. This avoids getting stuck on a too-low - * time delta with no samples being sent due to round-off. - */ - todo_us = samples_todo * G_USEC_PER_SEC / devc->cur_samplerate; - - logic_done = devc->num_logic_channels > 0 ? 0 : samples_todo; - analog_done = devc->num_analog_channels > 0 ? 0 : samples_todo; - - while (logic_done < samples_todo || analog_done < samples_todo) { - /* Logic */ - if (logic_done < samples_todo) { - sending_now = MIN(samples_todo - logic_done, - 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); - logic_done += sending_now; - } - - /* Analog, one channel at a time */ - if (analog_done < samples_todo) { - analog_sent = 0; - - g_hash_table_iter_init(&iter, devc->ch_ag); - while (g_hash_table_iter_next(&iter, NULL, &value)) { - send_analog_packet(value, sdi, &analog_sent, - devc->sent_samples + analog_done, - samples_todo - analog_done); - } - analog_done += analog_sent; - } - } - /* At this point, both logic_done and analog_done should be - * exactly equal to samples_todo, or else. - */ - if (logic_done != samples_todo || analog_done != samples_todo) { - sr_err("BUG: Sample count mismatch."); - return G_SOURCE_REMOVE; - } - devc->sent_samples += samples_todo; - devc->spent_us += todo_us; - - if ((devc->limit_samples > 0 && devc->sent_samples >= devc->limit_samples) - || (limit_us > 0 && devc->spent_us >= limit_us)) { - - /* If we're averaging everything - now is the time to send data */ - if (devc->avg_samples == 0) { - g_hash_table_iter_init(&iter, devc->ch_ag); - while (g_hash_table_iter_next(&iter, NULL, &value)) { - ag = value; - packet.type = SR_DF_ANALOG; - packet.payload = &ag->packet; - ag->packet.data = &ag->avg_val; - ag->packet.num_samples = 1; - sr_session_send(sdi, &packet); - } - } - sr_dbg("Requested number of samples reached."); - dev_acquisition_stop(sdi); - } - - return G_SOURCE_CONTINUE; -} - -static int dev_acquisition_start(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - GHashTableIter iter; - void *value; - - if (sdi->status != SR_ST_ACTIVE) - return SR_ERR_DEV_CLOSED; - - devc = sdi->priv; - devc->sent_samples = 0; - - g_hash_table_iter_init(&iter, devc->ch_ag); - while (g_hash_table_iter_next(&iter, NULL, &value)) - generate_analog_pattern(value, devc->cur_samplerate); - - sr_session_source_add(sdi->session, -1, 0, 100, - prepare_data, (struct sr_dev_inst *)sdi); - - std_session_send_df_header(sdi); - - /* We use this timestamp to decide how many more samples to send. */ - devc->start_us = g_get_monotonic_time(); - devc->spent_us = 0; - - return SR_OK; -} - -static int dev_acquisition_stop(struct sr_dev_inst *sdi) -{ - sr_dbg("Stopping acquisition."); - sr_session_source_remove(sdi->session, -1); - std_session_send_df_end(sdi); - - return SR_OK; -} - -static struct sr_dev_driver demo_driver_info = { - .name = "demo", - .longname = "Demo driver and pattern generator", - .api_version = 1, - .init = std_init, - .cleanup = std_cleanup, - .scan = scan, - .dev_list = std_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, - .context = NULL, -}; -SR_REGISTER_DEV_DRIVER(demo_driver_info); diff --git a/src/hardware/demo/protocol.c b/src/hardware/demo/protocol.c new file mode 100644 index 00000000..0b58106a --- /dev/null +++ b/src/hardware/demo/protocol.c @@ -0,0 +1,328 @@ +/* + * This file is part of the libsigrok project. + * + * Copyright (C) 2010 Uwe Hermann + * Copyright (C) 2011 Olivier Fauchon + * Copyright (C) 2012 Alexandru Gagniuc + * Copyright (C) 2015 Bartosz Golaszewski + * + * 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 +#include +#include "libsigrok-internal.h" +#include "protocol.h" + +#define ANALOG_SAMPLES_PER_PERIOD 20 + +static const 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 void demo_generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate) +{ + double t, frequency; + float value; + unsigned int num_samples, i; + int last_end; + + sr_dbg("Generating %s pattern.", analog_pattern_str[ag->pattern]); + + num_samples = ANALOG_BUFSIZE / sizeof(float); + + switch (ag->pattern) { + case PATTERN_SQUARE: + value = ag->amplitude; + last_end = 0; + for (i = 0; i < num_samples; i++) { + if (i % 5 == 0) + value = -value; + if (i % 10 == 0) + last_end = i; + ag->pattern_data[i] = value; + } + ag->num_samples = last_end; + break; + case PATTERN_SINE: + frequency = (double) 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 + * useful 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] = ag->amplitude * + sin(2 * G_PI * frequency * t); + } + + ag->num_samples = num_samples; + break; + case PATTERN_TRIANGLE: + frequency = (double) 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 * ag->amplitude / G_PI) * + asin(sin(2 * G_PI * frequency * t)); + } + + ag->num_samples = num_samples; + break; + case PATTERN_SAWTOOTH: + frequency = (double) 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 * ag->amplitude * + ((t * frequency) - floor(0.5f + t * frequency)); + } + + ag->num_samples = num_samples; + break; + } +} + +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; + } +} + +static void send_analog_packet(struct analog_gen *ag, + struct sr_dev_inst *sdi, uint64_t *analog_sent, + uint64_t analog_pos, uint64_t analog_todo) +{ + struct sr_datafeed_packet packet; + struct dev_context *devc; + uint64_t sending_now, to_avg; + int ag_pattern_pos; + unsigned int i; + + devc = sdi->priv; + packet.type = SR_DF_ANALOG; + packet.payload = &ag->packet; + + if (!devc->avg) { + ag_pattern_pos = analog_pos % ag->num_samples; + sending_now = MIN(analog_todo, ag->num_samples-ag_pattern_pos); + ag->packet.data = ag->pattern_data + ag_pattern_pos; + ag->packet.num_samples = sending_now; + sr_session_send(sdi, &packet); + + /* Whichever channel group gets there first. */ + *analog_sent = MAX(*analog_sent, sending_now); + } else { + ag_pattern_pos = analog_pos % ag->num_samples; + to_avg = MIN(analog_todo, ag->num_samples-ag_pattern_pos); + + for (i = 0; i < to_avg; i++) { + ag->avg_val = (ag->avg_val + + *(ag->pattern_data + + ag_pattern_pos + i)) / 2; + ag->num_avgs++; + /* Time to send averaged data? */ + if (devc->avg_samples > 0 && + ag->num_avgs >= devc->avg_samples) + goto do_send; + } + + if (devc->avg_samples == 0) { + /* We're averaging all the samples, so wait with + * sending until the very end. + */ + *analog_sent = ag->num_avgs; + return; + } + +do_send: + ag->packet.data = &ag->avg_val; + ag->packet.num_samples = 1; + + sr_session_send(sdi, &packet); + *analog_sent = ag->num_avgs; + + ag->num_avgs = 0; + ag->avg_val = 0.0f; + } +} + +/* Callback handling data */ +SR_PRIV int demo_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 analog_gen *ag; + GHashTableIter iter; + void *value; + uint64_t samples_todo, logic_done, analog_done, analog_sent, sending_now; + int64_t elapsed_us, limit_us, todo_us; + + (void)fd; + (void)revents; + + sdi = cb_data; + devc = sdi->priv; + + /* Just in case. */ + if (devc->cur_samplerate <= 0 + || (devc->num_logic_channels <= 0 + && devc->num_analog_channels <= 0)) { + sdi->driver->dev_acquisition_stop(sdi); + return G_SOURCE_CONTINUE; + } + + /* What time span should we send samples for? */ + elapsed_us = g_get_monotonic_time() - devc->start_us; + limit_us = 1000 * devc->limit_msec; + if (limit_us > 0 && limit_us < elapsed_us) + todo_us = MAX(0, limit_us - devc->spent_us); + else + todo_us = MAX(0, elapsed_us - devc->spent_us); + + /* How many samples are outstanding since the last round? */ + samples_todo = (todo_us * devc->cur_samplerate + G_USEC_PER_SEC - 1) + / G_USEC_PER_SEC; + if (devc->limit_samples > 0) { + if (devc->limit_samples < devc->sent_samples) + samples_todo = 0; + else if (devc->limit_samples - devc->sent_samples < samples_todo) + samples_todo = devc->limit_samples - devc->sent_samples; + } + /* Calculate the actual time covered by this run back from the sample + * count, rounded towards zero. This avoids getting stuck on a too-low + * time delta with no samples being sent due to round-off. + */ + todo_us = samples_todo * G_USEC_PER_SEC / devc->cur_samplerate; + + logic_done = devc->num_logic_channels > 0 ? 0 : samples_todo; + analog_done = devc->num_analog_channels > 0 ? 0 : samples_todo; + + while (logic_done < samples_todo || analog_done < samples_todo) { + /* Logic */ + if (logic_done < samples_todo) { + sending_now = MIN(samples_todo - logic_done, + 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); + logic_done += sending_now; + } + + /* Analog, one channel at a time */ + if (analog_done < samples_todo) { + analog_sent = 0; + + g_hash_table_iter_init(&iter, devc->ch_ag); + while (g_hash_table_iter_next(&iter, NULL, &value)) { + send_analog_packet(value, sdi, &analog_sent, + devc->sent_samples + analog_done, + samples_todo - analog_done); + } + analog_done += analog_sent; + } + } + /* At this point, both logic_done and analog_done should be + * exactly equal to samples_todo, or else. + */ + if (logic_done != samples_todo || analog_done != samples_todo) { + sr_err("BUG: Sample count mismatch."); + return G_SOURCE_REMOVE; + } + devc->sent_samples += samples_todo; + devc->spent_us += todo_us; + + if ((devc->limit_samples > 0 && devc->sent_samples >= devc->limit_samples) + || (limit_us > 0 && devc->spent_us >= limit_us)) { + + /* If we're averaging everything - now is the time to send data */ + if (devc->avg_samples == 0) { + g_hash_table_iter_init(&iter, devc->ch_ag); + while (g_hash_table_iter_next(&iter, NULL, &value)) { + ag = value; + packet.type = SR_DF_ANALOG; + packet.payload = &ag->packet; + ag->packet.data = &ag->avg_val; + ag->packet.num_samples = 1; + sr_session_send(sdi, &packet); + } + } + sr_dbg("Requested number of samples reached."); + sdi->driver->dev_acquisition_stop(sdi); + } + + return G_SOURCE_CONTINUE; +} diff --git a/src/hardware/demo/protocol.h b/src/hardware/demo/protocol.h new file mode 100644 index 00000000..2562de99 --- /dev/null +++ b/src/hardware/demo/protocol.h @@ -0,0 +1,120 @@ +/* + * This file is part of the libsigrok project. + * + * Copyright (C) 2010 Uwe Hermann + * Copyright (C) 2011 Olivier Fauchon + * Copyright (C) 2012 Alexandru Gagniuc + * Copyright (C) 2015 Bartosz Golaszewski + * + * 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 + */ + +#ifndef LIBSIGROK_HARDWARE_DEMO_PROTOCOL_H +#define LIBSIGROK_HARDWARE_DEMO_PROTOCOL_H + +#include +#include +#include "libsigrok-internal.h" + +#define LOG_PREFIX "demo" + +/* 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 + +/* Private, per-device-instance driver context. */ +struct dev_context { + uint64_t cur_samplerate; + uint64_t limit_samples; + uint64_t limit_msec; + uint64_t sent_samples; + int64_t start_us; + int64_t spent_us; + uint64_t step; + /* Logic */ + int32_t num_logic_channels; + unsigned int logic_unitsize; + /* There is only ever one logic channel group, so its pattern goes here. */ + uint8_t logic_pattern; + unsigned char logic_data[LOGIC_BUFSIZE]; + /* Analog */ + int32_t num_analog_channels; + GHashTable *ch_ag; + gboolean avg; /* True if averaging is enabled */ + uint64_t avg_samples; +}; + +/* Logic patterns we can generate. */ +enum { + /** + * Spells "sigrok" across 8 channels using '0's (with '1's as + * "background") when displayed using the 'bits' output format. + * The pattern is repeated every 8 channels, shifted to the right + * in time by one bit. + */ + PATTERN_SIGROK, + + /** Pseudo-random values on all channels. */ + PATTERN_RANDOM, + + /** + * Incrementing number across 8 channels. The pattern is repeated + * every 8 channels, shifted to the right in time by one bit. + */ + PATTERN_INC, + + /** All channels have a low logic state. */ + PATTERN_ALL_LOW, + + /** All channels 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 *analog_pattern_str[] = { + "square", + "sine", + "triangle", + "sawtooth", +}; + +struct analog_gen { + int pattern; + float amplitude; + float pattern_data[ANALOG_BUFSIZE]; + unsigned int num_samples; + struct sr_datafeed_analog packet; + struct sr_analog_encoding encoding; + struct sr_analog_meaning meaning; + struct sr_analog_spec spec; + float avg_val; /* Average value */ + unsigned num_avgs; /* Number of samples averaged */ +}; + +SR_PRIV void demo_generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate); +SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data); + +#endif