* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com>
* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+ * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com>
*
* 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
float pattern_data[ANALOG_BUFSIZE];
unsigned int num_samples;
struct sr_datafeed_analog packet;
+ float avg_val; /* Average value */
+ unsigned num_avgs; /* Number of samples averaged */
};
/* Private, per-device-instance driver context. */
/* 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[] = {
};
static const uint32_t devopts[] = {
- SR_CONF_DEMO_DEV,
- SR_CONF_LOGIC_ANALYZER,
- SR_CONF_OSCILLOSCOPE,
- SR_CONF_CONTINUOUS,
+ SR_CONF_CONTINUOUS | SR_CONF_SET,
SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
-};
-
-static const uint32_t devopts_global[] = {
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[] = {
+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,
};
SR_HZ(1),
};
-static uint8_t pattern_sigrok[] = {
+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,
};
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 init(struct sr_context *sr_ctx)
+static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
if (i % 5 == 0)
value = -value;
if (i % 10 == 0)
- last_end = i - 1;
+ 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
- * usefull here.*/
+ * 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 * M_PI * frequency * t);
+ sin(2 * G_PI * frequency * t);
}
ag->num_samples = num_samples;
break;
-
case PATTERN_TRIANGLE:
frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD;
for (i = 0; i < num_samples; i++) {
t = (double) i / (double) sample_rate;
- ag->pattern_data[i] = (2 * ag->amplitude / M_PI) *
- asin(sin(2 * M_PI * frequency * t));
+ 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;
}
}
-static GSList *scan(GSList *options)
+static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
struct drv_context *drvc;
struct dev_context *devc;
devices = NULL;
- sdi = sr_dev_inst_new();
+ sdi = g_malloc0(sizeof(struct sr_dev_inst));
sdi->status = SR_ST_ACTIVE;
- sdi->model = "Demo device";
+ sdi->model = g_strdup("Demo device");
sdi->driver = di;
devc = g_malloc(sizeof(struct dev_context));
devc->logic_unitsize = (devc->num_logic_channels + 7) / 8;
devc->logic_pattern = PATTERN_SIGROK;
devc->num_analog_channels = num_analog_channels;
+ devc->avg = FALSE;
+ devc->avg_samples = 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);
- if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, channel_name)))
- return NULL;
- sdi->channels = g_slist_append(sdi->channels, ch);
+ 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);
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(i + num_logic_channels, SR_CHANNEL_ANALOG,
+ ch = sr_channel_new(sdi, i + num_logic_channels, SR_CHANNEL_ANALOG,
TRUE, channel_name);
- sdi->channels = g_slist_append(sdi->channels, ch);
acg->channels = g_slist_append(acg->channels, ch);
/* Every analog channel gets its own channel group as well. */
ag->packet.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))
return devices;
}
-static GSList *dev_list(void)
+static GSList *dev_list(const struct sr_dev_driver *di)
{
return ((struct drv_context *)(di->priv))->instances;
}
g_free(devc);
}
-static int cleanup(void)
+static int cleanup(const struct sr_dev_driver *di)
{
return std_dev_clear(di, clear_helper);
}
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;
switch (key) {
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_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)
GVariant *gvar;
GVariantBuilder gvb;
- (void)sdi;
-
if (key == SR_CONF_SCAN_OPTIONS) {
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
- devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
+ drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
return SR_OK;
}
switch (key) {
case SR_CONF_DEVICE_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
- devopts_global, ARRAY_SIZE(devopts_global), sizeof(uint32_t));
+ devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
break;
case SR_CONF_SAMPLERATE:
g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
return SR_ERR_NA;
}
} else {
- /* Any channel in the group will do. */
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_INT32,
+ *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)
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- devopts_cg_analog, ARRAY_SIZE(devopts_cg_analog),
- 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));
}
}
+static void send_analog_packet(struct analog_gen *ag,
+ struct sr_dev_inst *sdi,
+ uint64_t *analog_sent,
+ 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 = devc->analog_counter % 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 = devc->analog_counter % 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)
{
/* How many samples should we have sent by now? */
time = g_get_monotonic_time();
elapsed = time - devc->starttime;
- expected_samplenum = elapsed * devc->cur_samplerate / 1000000;
+ expected_samplenum = elapsed * devc->cur_samplerate / (1000 * 1000);
/* But never more than the limit, if there is one. */
if (!devc->continuous)
expected_samplenum = MIN(expected_samplenum, devc->limit_samples);
/* Of those, how many do we still have to send? */
- if (devc->num_logic_channels)
+ if (devc->num_logic_channels && (devc->logic_counter < devc->limit_samples))
logic_todo = expected_samplenum - devc->logic_counter;
- if (devc->num_analog_channels)
+ if (devc->num_analog_channels && (devc->analog_counter < devc->limit_samples))
analog_todo = expected_samplenum - devc->analog_counter;
while (logic_todo || analog_todo) {
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;
-
- /* 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 */
-
- sending_now = MIN(analog_todo, ag->num_samples);
- ag->packet.num_samples = sending_now;
- sr_session_send(sdi, &packet);
-
- /* Whichever channel group gets there first. */
- analog_sent = MAX(analog_sent, sending_now);
+ send_analog_packet(value, sdi,
+ &analog_sent, analog_todo);
}
analog_todo -= analog_sent;
devc->analog_counter += analog_sent;
if (!devc->continuous
&& (!devc->num_logic_channels || devc->logic_counter >= devc->limit_samples)
&& (!devc->num_analog_channels || devc->analog_counter >= devc->limit_samples)) {
+ /* 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, cb_data);
return TRUE;
projects / libsigrok.git / blobdiff