X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=3c6585dd0086d81fad2a7e5957a5c2357a8ff171;hp=154305d21d5c420a0a2085c9fe7cd816dbed32e8;hb=ba7dd8bbb8168cba432a844259a3e239aa5f36d7;hpb=2388ae860c369171d8728539ce2e9aab5810896b diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c index 154305d2..3c6585dd 100644 --- a/hardware/demo/demo.c +++ b/hardware/demo/demo.c @@ -23,6 +23,7 @@ #include #include #include +#include #ifdef _WIN32 #include #include @@ -41,29 +42,32 @@ /* 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 + * Spells "sigrok" across 8 channels 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 + * The pattern is repeasted every 8 channels, shifted to the right * in time by one bit. */ PATTERN_SIGROK, - /** Pseudo-random values on all probes. */ + /** Pseudo-random values on all channels. */ PATTERN_RANDOM, /** - * Incrementing number across 8 probes. The pattern is repeasted - * every 8 probes, shifted to the right in time by one bit. + * Incrementing number across 8 channels. The pattern is repeasted + * every 8 channels, shifted to the right in time by one bit. */ PATTERN_INC, - /** All probes have a low logic state. */ + /** All channels have a low logic state. */ PATTERN_ALL_LOW, - /** All probes have a high logic state. */ + /** All channels have a high logic state. */ PATTERN_ALL_HIGH, }; @@ -73,6 +77,9 @@ enum { * Square wave. */ PATTERN_SQUARE, + PATTERN_SINE, + PATTERN_TRIANGLE, + PATTERN_SAWTOOTH, }; static const char *logic_pattern_str[] = { @@ -85,6 +92,9 @@ static const char *logic_pattern_str[] = { static const char *analog_pattern_str[] = { "square", + "sine", + "triangle", + "sawtooth", }; struct analog_gen { @@ -101,18 +111,19 @@ struct dev_context { uint64_t cur_samplerate; uint64_t limit_samples; uint64_t limit_msec; - uint64_t samples_counter; + uint64_t logic_counter; + uint64_t analog_counter; int64_t starttime; uint64_t step; /* Logic */ - int32_t num_logic_probes; + int32_t num_logic_channels; unsigned int logic_unitsize; - /* There is only ever one logic probe group, so its pattern goes here. */ + /* 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_probes; - GSList *analog_probe_groups; + int32_t num_analog_channels; + GSList *analog_channel_groups; }; static const int32_t scanopts[] = { @@ -128,7 +139,7 @@ static const int devopts[] = { SR_CONF_LIMIT_MSEC, }; -static const int devopts_pg[] = { +static const int devopts_cg[] = { SR_CONF_PATTERN_MODE, }; @@ -155,30 +166,28 @@ 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 set_analog_pattern(const struct sr_probe_group *probe_group, int pattern) +static void generate_analog_pattern(const struct sr_channel_group *cg, 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; - ag->pattern = pattern; + ag = cg->priv; + num_samples = ANALOG_BUFSIZE / sizeof(float); + + sr_dbg("Generating %s pattern for channel group %s", + analog_pattern_str[ag->pattern], cg->name); - switch (pattern) { + switch (ag->pattern) { case PATTERN_SQUARE: - num_samples = ANALOG_BUFSIZE / sizeof(float); - value = 5.0; + value = ANALOG_AMPLITUDE; last_end = 0; for (i = 0; i < num_samples; i++) { if (i % 5 == 0) @@ -189,6 +198,55 @@ static void set_analog_pattern(const struct sr_probe_group *probe_group, int pat } 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 + * 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 = (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 * ANALOG_AMPLITUDE / M_PI) * + asin(sin(2 * M_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 * ANALOG_AMPLITUDE * + ((t * frequency) - floor(0.5f + t * frequency)); + } + + ag->num_samples = num_samples; + break; } } @@ -197,26 +255,26 @@ 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_channel *ch; + struct sr_channel_group *cg; struct sr_config *src; struct analog_gen *ag; GSList *devices, *l; - int num_logic_probes, num_analog_probes, i; - char probe_name[16]; + int num_logic_channels, num_analog_channels, pattern, i; + char channel_name[16]; drvc = di->priv; - num_logic_probes = DEFAULT_NUM_LOGIC_PROBES; - num_analog_probes = DEFAULT_NUM_ANALOG_PROBES; + num_logic_channels = DEFAULT_NUM_LOGIC_PROBES; + num_analog_channels = 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); + num_logic_channels = g_variant_get_int32(src->data); break; case SR_CONF_NUM_ANALOG_PROBES: - num_analog_probes = g_variant_get_int32(src->data); + num_analog_channels = g_variant_get_int32(src->data); break; } } @@ -237,53 +295,59 @@ static GSList *scan(GSList *options) 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->num_logic_channels = num_logic_channels; + devc->logic_unitsize = (devc->num_logic_channels + 7) / 8; devc->logic_pattern = PATTERN_SIGROK; - devc->num_analog_probes = num_analog_probes; - devc->analog_probe_groups = NULL; + devc->num_analog_channels = num_analog_channels; + devc->analog_channel_groups = NULL; - /* Logic probes, all in one probe group. */ - if (!(pg = g_try_malloc(sizeof(struct sr_probe_group)))) + /* Logic channels, all in one channel group. */ + if (!(cg = g_try_malloc(sizeof(struct sr_channel_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))) + cg->name = g_strdup("Logic"); + cg->channels = NULL; + cg->priv = NULL; + for (i = 0; i < num_logic_channels; i++) { + sprintf(channel_name, "D%d", i); + if (!(ch = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, channel_name))) return NULL; - sdi->probes = g_slist_append(sdi->probes, probe); - pg->probes = g_slist_append(pg->probes, probe); + sdi->channels = g_slist_append(sdi->channels, ch); + cg->channels = g_slist_append(cg->channels, ch); } - sdi->probe_groups = g_slist_append(NULL, pg); + sdi->channel_groups = g_slist_append(NULL, cg); - /* 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))) + /* Analog channels, channel groups and pattern generators. */ + + pattern = 0; + for (i = 0; i < num_analog_channels; i++) { + sprintf(channel_name, "A%d", i); + if (!(ch = sr_probe_new(i + num_logic_channels, + SR_PROBE_ANALOG, TRUE, channel_name))) return NULL; - sdi->probes = g_slist_append(sdi->probes, probe); + sdi->channels = g_slist_append(sdi->channels, ch); - /* Every analog probe gets its own probe group. */ - if (!(pg = g_try_malloc(sizeof(struct sr_probe_group)))) + /* Every analog channel gets its own channel group. */ + if (!(cg = g_try_malloc(sizeof(struct sr_channel_group)))) return NULL; - pg->name = g_strdup(probe_name); - pg->probes = g_slist_append(NULL, probe); + cg->name = g_strdup(channel_name); + cg->channels = g_slist_append(NULL, ch); - /* Every probe group gets a generator struct. */ + /* Every channel group gets a generator struct. */ if (!(ag = g_try_malloc(sizeof(struct analog_gen)))) return NULL; - ag->packet.probes = pg->probes; + ag->packet.channels = cg->channels; ag->packet.mq = 0; ag->packet.mqflags = 0; ag->packet.unit = SR_UNIT_VOLT; ag->packet.data = ag->pattern_data; - pg->priv = ag; - set_analog_pattern(pg, PATTERN_SQUARE); + ag->pattern = pattern; + cg->priv = ag; + + sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); + devc->analog_channel_groups = g_slist_append(devc->analog_channel_groups, cg); - sdi->probe_groups = g_slist_append(sdi->probe_groups, pg); - devc->analog_probe_groups = g_slist_append(devc->analog_probe_groups, pg); + if (++pattern == ARRAY_SIZE(analog_pattern_str)) + pattern = 0; } sdi->priv = devc; @@ -314,14 +378,14 @@ static int dev_close(struct sr_dev_inst *sdi) static int cleanup(void) { - return dev_clear(); + return std_dev_clear(di, NULL); } static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, - const struct sr_probe_group *probe_group) + const struct sr_channel_group *cg) { struct dev_context *devc; - struct sr_probe *probe; + struct sr_channel *ch; struct analog_gen *ag; int pattern; @@ -340,24 +404,24 @@ static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, *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) { + if (!cg) + return SR_ERR_CHANNEL_GROUP; + ch = cg->channels->data; + if (ch->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; + } else if (ch->type == SR_PROBE_ANALOG) { + ag = cg->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); + *data = g_variant_new_int32(devc->num_logic_channels); break; case SR_CONF_NUM_ANALOG_PROBES: - *data = g_variant_new_int32(devc->num_analog_probes); + *data = g_variant_new_int32(devc->num_analog_channels); break; default: return SR_ERR_NA; @@ -367,10 +431,11 @@ static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, } static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, - const struct sr_probe_group *probe_group) + const struct sr_channel_group *cg) { struct dev_context *devc; - struct sr_probe *probe; + struct analog_gen *ag; + struct sr_channel *ch; int pattern, ret; unsigned int i; const char *stropt; @@ -397,12 +462,12 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, 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; + if (!cg) + return SR_ERR_CHANNEL_GROUP; stropt = g_variant_get_string(data, NULL); - probe = probe_group->probes->data; + ch = cg->channels->data; pattern = -1; - if (probe->type == SR_PROBE_LOGIC) { + if (ch->type == SR_PROBE_LOGIC) { for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) { if (!strcmp(stropt, logic_pattern_str[i])) { pattern = i; @@ -420,7 +485,7 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, 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) { + } else if (ch->type == SR_PROBE_ANALOG) { for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) { if (!strcmp(stropt, analog_pattern_str[i])) { pattern = i; @@ -429,9 +494,10 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, } if (pattern == -1) return SR_ERR_ARG; - sr_dbg("Setting analog pattern to %s", - analog_pattern_str[pattern]); - set_analog_pattern(probe_group, pattern); + sr_dbg("Setting analog pattern for channel group %s to %s", + cg->name, analog_pattern_str[pattern]); + ag = cg->priv; + ag->pattern = pattern; } else return SR_ERR_BUG; break; @@ -443,9 +509,9 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, } static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, - const struct sr_probe_group *probe_group) + const struct sr_channel_group *cg) { - struct sr_probe *probe; + struct sr_channel *ch; GVariant *gvar; GVariantBuilder gvb; @@ -460,7 +526,7 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, if (!sdi) return SR_ERR_ARG; - if (!probe_group) { + if (!cg) { switch (key) { case SR_CONF_DEVICE_OPTIONS: *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, @@ -477,17 +543,17 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, return SR_ERR_NA; } } else { - probe = probe_group->probes->data; + ch = cg->channels->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)); + devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(int32_t)); break; case SR_CONF_PATTERN_MODE: - if (probe->type == SR_PROBE_LOGIC) + if (ch->type == SR_PROBE_LOGIC) *data = g_variant_new_strv(logic_pattern_str, ARRAY_SIZE(logic_pattern_str)); - else if (probe->type == SR_PROBE_ANALOG) + else if (ch->type == SR_PROBE_ANALOG) *data = g_variant_new_strv(analog_pattern_str, ARRAY_SIZE(analog_pattern_str)); else @@ -549,10 +615,10 @@ static int prepare_data(int fd, int revents, void *cb_data) struct dev_context *devc; struct sr_datafeed_packet packet; struct sr_datafeed_logic logic; - struct sr_probe_group *pg; + struct sr_channel_group *cg; struct analog_gen *ag; GSList *l; - uint64_t samples_to_send, expected_samplenum, analog_samples, sending_now; + uint64_t logic_todo, analog_todo, expected_samplenum, analog_samples, sending_now; int64_t time, elapsed; (void)fd; @@ -565,20 +631,15 @@ static int prepare_data(int fd, int revents, void *cb_data) 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; + /* Of those, how many do we still have to send? */ + logic_todo = MIN(expected_samplenum, devc->limit_samples) - devc->logic_counter; + analog_todo = MIN(expected_samplenum, devc->limit_samples) - devc->analog_counter; + while (logic_todo || analog_todo) { /* Logic */ - if (devc->num_logic_probes > 0) { - sending_now = MIN(samples_to_send, + if (devc->num_logic_channels > 0 && logic_todo > 0) { + sending_now = MIN(logic_todo, LOGIC_BUFSIZE / devc->logic_unitsize); logic_generator(sdi, sending_now * devc->logic_unitsize); packet.type = SR_DF_LOGIC; @@ -587,31 +648,38 @@ static int prepare_data(int fd, int revents, void *cb_data) logic.unitsize = devc->logic_unitsize; logic.data = devc->logic_data; sr_session_send(sdi, &packet); + logic_todo -= sending_now; + devc->logic_counter += sending_now; } - /* Analog, one probe at a time */ - if (devc->num_analog_probes > 0) { + /* Analog, one channel at a time */ + if (devc->num_analog_channels > 0 && analog_todo > 0) { sending_now = 0; - for (l = devc->analog_probe_groups; l; l = l->next) { - pg = l->data; - ag = pg->priv; + for (l = devc->analog_channel_groups; l; l = l->next) { + cg = l->data; + ag = cg->priv; packet.type = SR_DF_ANALOG; packet.payload = &ag->packet; - analog_samples = MIN(samples_to_send, ag->num_samples); - /* Whichever probe group gets there first. */ + + /* 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(analog_todo, ag->num_samples); + /* Whichever channel group gets there first. */ sending_now = MAX(sending_now, analog_samples); ag->packet.num_samples = analog_samples; sr_session_send(sdi, &packet); } + analog_todo -= sending_now; + devc->analog_counter += sending_now; } - - 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."); + if (devc->logic_counter >= devc->limit_samples && + devc->analog_counter >= devc->limit_samples) { + sr_dbg("Requested number of samples reached."); dev_acquisition_stop(sdi, cb_data); return TRUE; } @@ -621,14 +689,16 @@ static int prepare_data(int fd, int revents, void *cb_data) 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; + if (devc->limit_samples == 0) + return SR_ERR; + devc->logic_counter = devc->analog_counter = 0; /* * Setting two channels connected by a pipe is a remnant from when the @@ -642,6 +712,10 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) return SR_ERR; } + for (l = devc->analog_channel_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); @@ -672,7 +746,7 @@ static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) (void)cb_data; devc = sdi->priv; - sr_dbg("Stopping aquisition."); + sr_dbg("Stopping acquisition."); sr_session_source_remove_channel(devc->channel); g_io_channel_shutdown(devc->channel, FALSE, NULL); @@ -694,7 +768,7 @@ SR_PRIV struct sr_dev_driver demo_driver_info = { .cleanup = cleanup, .scan = scan, .dev_list = dev_list, - .dev_clear = dev_clear, + .dev_clear = NULL, .config_get = config_get, .config_set = config_set, .config_list = config_list,