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demo: File naming consistency changes.

This commit is contained in:
Uwe Hermann 2016-09-19 01:48:56 +02:00
parent caeb8d7a9d
commit ba508e22d4
4 changed files with 454 additions and 388 deletions
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4
Makefile.am
View File

@ -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 += \

390
src/hardware/demo/demo.c → src/hardware/demo/api.c
View File

@ -27,56 +27,12 @@
#include <math.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#define LOG_PREFIX "demo"
#include "protocol.h"
#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",
@ -86,48 +42,6 @@ static const char *logic_pattern_str[] = {
"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,
@ -167,92 +81,6 @@ static const uint64_t samplerates[] = {
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;
@ -621,218 +449,6 @@ static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *
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;
@ -847,10 +463,10 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
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);
demo_generate_analog_pattern(value, devc->cur_samplerate);
sr_session_source_add(sdi->session, -1, 0, 100,
prepare_data, (struct sr_dev_inst *)sdi);
demo_prepare_data, (struct sr_dev_inst *)sdi);
std_session_send_df_header(sdi);

328
src/hardware/demo/protocol.c Normal file
View File

@ -0,0 +1,328 @@
/*
* This file is part of the libsigrok project.
*
* 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
* 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 <config.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <libsigrok/libsigrok.h>
#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;
}

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src/hardware/demo/protocol.h Normal file
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/*
* This file is part of the libsigrok project.
*
* 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
* 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 <stdint.h>
#include <libsigrok/libsigrok.h>
#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