* 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>
+ * Copyright (C) 2019 Frank Stettner <frank-stettner@gmx.net>
*
* 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
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },
};
-SR_PRIV void demo_generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate)
+SR_PRIV void demo_generate_analog_pattern(struct dev_context *devc)
{
double t, frequency;
- float value;
+ float amplitude, offset;
+ struct analog_pattern *pattern;
unsigned int num_samples, i;
+ float value;
int last_end;
- sr_dbg("Generating %s pattern.", analog_pattern_str[ag->pattern]);
-
num_samples = ANALOG_BUFSIZE / sizeof(float);
+ frequency = (double) devc->cur_samplerate / ANALOG_SAMPLES_PER_PERIOD;
+ amplitude = DEFAULT_ANALOG_AMPLITUDE;
+ offset = DEFAULT_ANALOG_OFFSET;
+
+ /*
+ * FIXME: We actually need only one period. A ringbuffer would be
+ * useful here.
+ * Make sure the number of samples we put out is an integer
+ * multiple of our period size.
+ */
- 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;
+ /* PATTERN_SQUARE: */
+ sr_dbg("Generating %s pattern.", analog_pattern_str[PATTERN_SQUARE]);
+ pattern = g_malloc(sizeof(struct analog_pattern));
+ value = amplitude;
+ last_end = 0;
+ for (i = 0; i < num_samples; i++) {
+ if (i % 5 == 0)
+ value = -value;
+ if (i % 10 == 0)
+ last_end = i;
+ pattern->data[i] = value + offset;
+ }
+ pattern->num_samples = last_end;
+ devc->analog_patterns[PATTERN_SQUARE] = pattern;
+
+ /* Readjusting num_samples for all other patterns. */
+ while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0)
+ num_samples--;
+
+ /* PATTERN_SINE: */
+ sr_dbg("Generating %s pattern.", analog_pattern_str[PATTERN_SINE]);
+ pattern = g_malloc(sizeof(struct analog_pattern));
+ for (i = 0; i < num_samples; i++) {
+ t = (double) i / (double) devc->cur_samplerate;
+ pattern->data[i] = sin(2 * G_PI * frequency * t) * amplitude + offset;
}
+ pattern->num_samples = last_end;
+ devc->analog_patterns[PATTERN_SINE] = pattern;
+
+ /* PATTERN_TRIANGLE: */
+ sr_dbg("Generating %s pattern.", analog_pattern_str[PATTERN_TRIANGLE]);
+ pattern = g_malloc(sizeof(struct analog_pattern));
+ for (i = 0; i < num_samples; i++) {
+ t = (double) i / (double) devc->cur_samplerate;
+ pattern->data[i] = (2 / G_PI) * asin(sin(2 * G_PI * frequency * t)) *
+ amplitude + offset;
+ }
+ pattern->num_samples = last_end;
+ devc->analog_patterns[PATTERN_TRIANGLE] = pattern;
+
+ /* PATTERN_SAWTOOTH: */
+ sr_dbg("Generating %s pattern.", analog_pattern_str[PATTERN_SAWTOOTH]);
+ pattern = g_malloc(sizeof(struct analog_pattern));
+ for (i = 0; i < num_samples; i++) {
+ t = (double) i / (double) devc->cur_samplerate;
+ pattern->data[i] = 2 * ((t * frequency) - floor(0.5f + t * frequency)) *
+ amplitude + offset;
+ }
+ pattern->num_samples = last_end;
+ devc->analog_patterns[PATTERN_SAWTOOTH] = pattern;
}
static uint64_t encode_number_to_gray(uint64_t nr)
break;
case PATTERN_WALKING_ONE:
/* j contains the value of the highest bit */
- j = 1 << (devc->num_logic_channels - 1);
+ j = 1 << (devc->num_logic_channels - 1);
for (i = 0; i < size; i++) {
devc->logic_data[i] = devc->step;
if (devc->step == 0)
case PATTERN_WALKING_ZERO:
/* Same as walking one, only with inverted output */
/* j contains the value of the highest bit */
- j = 1 << (devc->num_logic_channels - 1);
+ j = 1 << (devc->num_logic_channels - 1);
for (i = 0; i < size; i++) {
devc->logic_data[i] = ~devc->step;
if (devc->step == 0)
{
struct sr_datafeed_packet packet;
struct dev_context *devc;
+ struct analog_pattern *pattern;
uint64_t sending_now, to_avg;
int ag_pattern_pos;
unsigned int i;
+ float amplitude, offset, value;
+ float *data;
if (!ag->ch || !ag->ch->enabled)
return;
packet.type = SR_DF_ANALOG;
packet.payload = &ag->packet;
+ pattern = devc->analog_patterns[ag->pattern];
+
+ ag->packet.meaning->channels = g_slist_append(NULL, ag->ch);
+ ag->packet.meaning->mq = ag->mq;
+ ag->packet.meaning->mqflags = ag->mq_flags;
+
+ /* Set a unit for the given quantity. */
+ if (ag->mq == SR_MQ_VOLTAGE)
+ ag->packet.meaning->unit = SR_UNIT_VOLT;
+ else if (ag->mq == SR_MQ_CURRENT)
+ ag->packet.meaning->unit = SR_UNIT_AMPERE;
+ else if (ag->mq == SR_MQ_RESISTANCE)
+ ag->packet.meaning->unit = SR_UNIT_OHM;
+ else if (ag->mq == SR_MQ_CAPACITANCE)
+ ag->packet.meaning->unit = SR_UNIT_FARAD;
+ else if (ag->mq == SR_MQ_TEMPERATURE)
+ ag->packet.meaning->unit = SR_UNIT_CELSIUS;
+ else if (ag->mq == SR_MQ_FREQUENCY)
+ ag->packet.meaning->unit = SR_UNIT_HERTZ;
+ else if (ag->mq == SR_MQ_DUTY_CYCLE)
+ ag->packet.meaning->unit = SR_UNIT_PERCENTAGE;
+ else if (ag->mq == SR_MQ_CONTINUITY)
+ ag->packet.meaning->unit = SR_UNIT_OHM;
+ else if (ag->mq == SR_MQ_PULSE_WIDTH)
+ ag->packet.meaning->unit = SR_UNIT_PERCENTAGE;
+ else if (ag->mq == SR_MQ_CONDUCTANCE)
+ ag->packet.meaning->unit = SR_UNIT_SIEMENS;
+ else if (ag->mq == SR_MQ_POWER)
+ ag->packet.meaning->unit = SR_UNIT_WATT;
+ else if (ag->mq == SR_MQ_GAIN)
+ ag->packet.meaning->unit = SR_UNIT_UNITLESS;
+ else if (ag->mq == SR_MQ_SOUND_PRESSURE_LEVEL)
+ ag->packet.meaning->unit = SR_UNIT_DECIBEL_SPL;
+ else if (ag->mq == SR_MQ_CARBON_MONOXIDE)
+ ag->packet.meaning->unit = SR_UNIT_CONCENTRATION;
+ else if (ag->mq == SR_MQ_RELATIVE_HUMIDITY)
+ ag->packet.meaning->unit = SR_UNIT_HUMIDITY_293K;
+ else if (ag->mq == SR_MQ_TIME)
+ ag->packet.meaning->unit = SR_UNIT_SECOND;
+ else if (ag->mq == SR_MQ_WIND_SPEED)
+ ag->packet.meaning->unit = SR_UNIT_METER_SECOND;
+ else if (ag->mq == SR_MQ_PRESSURE)
+ ag->packet.meaning->unit = SR_UNIT_HECTOPASCAL;
+ else if (ag->mq == SR_MQ_PARALLEL_INDUCTANCE)
+ ag->packet.meaning->unit = SR_UNIT_HENRY;
+ else if (ag->mq == SR_MQ_PARALLEL_CAPACITANCE)
+ ag->packet.meaning->unit = SR_UNIT_FARAD;
+ else if (ag->mq == SR_MQ_PARALLEL_RESISTANCE)
+ ag->packet.meaning->unit = SR_UNIT_OHM;
+ else if (ag->mq == SR_MQ_SERIES_INDUCTANCE)
+ ag->packet.meaning->unit = SR_UNIT_HENRY;
+ else if (ag->mq == SR_MQ_SERIES_CAPACITANCE)
+ ag->packet.meaning->unit = SR_UNIT_FARAD;
+ else if (ag->mq == SR_MQ_SERIES_RESISTANCE)
+ ag->packet.meaning->unit = SR_UNIT_OHM;
+ else if (ag->mq == SR_MQ_DISSIPATION_FACTOR)
+ ag->packet.meaning->unit = SR_UNIT_UNITLESS;
+ else if (ag->mq == SR_MQ_QUALITY_FACTOR)
+ ag->packet.meaning->unit = SR_UNIT_UNITLESS;
+ else if (ag->mq == SR_MQ_PHASE_ANGLE)
+ ag->packet.meaning->unit = SR_UNIT_DEGREE;
+ else if (ag->mq == SR_MQ_DIFFERENCE)
+ ag->packet.meaning->unit = SR_UNIT_UNITLESS;
+ else if (ag->mq == SR_MQ_COUNT)
+ ag->packet.meaning->unit = SR_UNIT_PIECE;
+ else if (ag->mq == SR_MQ_POWER_FACTOR)
+ ag->packet.meaning->unit = SR_UNIT_UNITLESS;
+ else if (ag->mq == SR_MQ_APPARENT_POWER)
+ ag->packet.meaning->unit = SR_UNIT_VOLT_AMPERE;
+ else if (ag->mq == SR_MQ_MASS)
+ ag->packet.meaning->unit = SR_UNIT_GRAM;
+ else if (ag->mq == SR_MQ_HARMONIC_RATIO)
+ ag->packet.meaning->unit = SR_UNIT_UNITLESS;
+ else
+ ag->packet.meaning->unit = SR_UNIT_UNITLESS;
+
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_pattern_pos = analog_pos % pattern->num_samples;
+ sending_now = MIN(analog_todo, pattern->num_samples - ag_pattern_pos);
+ if (ag->amplitude != DEFAULT_ANALOG_AMPLITUDE ||
+ ag->offset != DEFAULT_ANALOG_OFFSET) {
+
+ /* Amplitude or offset changed, modify each sample. */
+ amplitude = ag->amplitude / DEFAULT_ANALOG_AMPLITUDE;
+ offset = ag->offset - DEFAULT_ANALOG_OFFSET;
+ data = ag->packet.data;
+ for (i = 0; i < sending_now; i++)
+ data[i] = pattern->data[ag_pattern_pos + i] * amplitude + offset;
+ } else {
+ /* Amplitude and offset unchanged, use the fast way. */
+ ag->packet.data = 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);
+ ag_pattern_pos = analog_pos % pattern->num_samples;
+ to_avg = MIN(analog_todo, pattern->num_samples - ag_pattern_pos);
+ amplitude = ag->amplitude / DEFAULT_ANALOG_AMPLITUDE;
+ offset = ag->offset - DEFAULT_ANALOG_OFFSET;
for (i = 0; i < to_avg; i++) {
- ag->avg_val = (ag->avg_val +
- *(ag->pattern_data +
- ag_pattern_pos + i)) / 2;
+ value = *(pattern->data + ag_pattern_pos + i) * amplitude + offset;
+ ag->avg_val = (ag->avg_val + value) / 2;
ag->num_avgs++;
/* Time to send averaged data? */
- if (devc->avg_samples > 0 &&
- ag->num_avgs >= devc->avg_samples)
+ 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
+ /*
+ * We're averaging all the samples, so wait with
* sending until the very end.
*/
*analog_sent = ag->num_avgs;
void *value;
uint64_t samples_todo, logic_done, analog_done, analog_sent, sending_now;
int64_t elapsed_us, limit_us, todo_us;
+ int64_t trigger_offset;
+ int pre_trigger_samples;
(void)fd;
(void)revents;
logic_done = devc->num_logic_channels > 0 ? 0 : samples_todo;
if (!devc->enabled_logic_channels)
logic_done = samples_todo;
+
analog_done = devc->num_analog_channels > 0 ? 0 : samples_todo;
if (!devc->enabled_analog_channels)
analog_done = samples_todo;
sending_now = MIN(samples_todo - logic_done,
LOGIC_BUFSIZE / devc->logic_unitsize);
logic_generator(sdi, sending_now * devc->logic_unitsize);
+ /* Check for trigger and send pre-trigger data if needed */
+ if (devc->stl && (!devc->trigger_fired)) {
+ trigger_offset = soft_trigger_logic_check(devc->stl,
+ devc->logic_data, sending_now * devc->logic_unitsize,
+ &pre_trigger_samples);
+ if (trigger_offset > -1) {
+ devc->trigger_fired = TRUE;
+ logic_done = pre_trigger_samples;
+ }
+ } else
+ trigger_offset = 0;
+
+ /* Send logic samples if needed */
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;
- logic_fixup_feed(devc, &logic);
- sr_session_send(sdi, &packet);
- logic_done += sending_now;
+
+ if (devc->stl) {
+ if (devc->trigger_fired && (trigger_offset < (int)sending_now)) {
+ /* Send after-trigger data */
+ logic.length = (sending_now - trigger_offset) * devc->logic_unitsize;
+ logic.data = devc->logic_data + trigger_offset * devc->logic_unitsize;
+ logic_fixup_feed(devc, &logic);
+ sr_session_send(sdi, &packet);
+ logic_done += sending_now - trigger_offset;
+ /* End acquisition */
+ sr_dbg("Triggered, stopping acquisition.");
+ sr_dev_acquisition_stop(sdi);
+ break;
+ } else {
+ /* Send nothing */
+ logic_done += sending_now;
+ }
+ } else if (!devc->stl) {
+ /* No trigger defined, send logic samples */
+ logic.length = sending_now * devc->logic_unitsize;
+ logic.data = devc->logic_data;
+ logic_fixup_feed(devc, &logic);
+ sr_session_send(sdi, &packet);
+ logic_done += sending_now;
+ }
}
/* Analog, one channel at a time */
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->sent_frame_samples += samples_todo;
+
+ uint64_t min = MIN(logic_done, analog_done);
+ devc->sent_samples += min;
+ devc->sent_frame_samples += min;
devc->spent_us += todo_us;
if (devc->limit_frames && devc->sent_frame_samples >= SAMPLES_PER_FRAME) {
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