/*
- * This file is part of the sigrok project.
+ * 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>
*
* 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
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
-#include <sigrok.h>
+#include <math.h>
#ifdef _WIN32
#include <io.h>
#include <fcntl.h>
#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
#endif
-#include "config.h"
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
-#define NUM_PROBES 8
-#define DEMONAME "Demo device"
-/* size of chunks to send through the session bus */
-#define BUFSIZE 4096
+#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 ANALOG_AMPLITUDE 25
+#define ANALOG_SAMPLES_PER_PERIOD 20
+
+/* Logic patterns we can generate. */
enum {
- GENMODE_DEFAULT,
- GENMODE_RANDOM,
- GENMODE_INC,
+ /**
+ * 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,
};
-GIOChannel *channels[2];
+/* 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 pattern_data[ANALOG_BUFSIZE];
+ unsigned int num_samples;
+ struct sr_datafeed_analog packet;
+};
-struct databag {
+/* Private, per-device-instance driver context. */
+struct dev_context {
int pipe_fds[2];
- uint8_t sample_generator;
- uint8_t thread_running;
- uint64_t samples_counter;
- int device_index;
- int loop_sleep;
- gpointer session_device_id;
- GTimer *timer;
+ GIOChannel *channel;
+ uint64_t cur_samplerate;
+ uint64_t limit_samples;
+ uint64_t limit_msec;
+ uint64_t logic_counter;
+ uint64_t analog_counter;
+ int64_t starttime;
+ 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;
+ GSList *analog_channel_groups;
};
-static int capabilities[] = {
- HWCAP_LOGIC_ANALYZER,
- HWCAP_PATTERN_MODE,
- HWCAP_LIMIT_SAMPLES,
- HWCAP_LIMIT_MSEC,
- HWCAP_CONTINUOUS
+static const int32_t scanopts[] = {
+ SR_CONF_NUM_LOGIC_CHANNELS,
+ SR_CONF_NUM_ANALOG_CHANNELS,
};
-static const char *patternmodes[] = {
- "random",
- "incremental",
- NULL,
+static const int devopts[] = {
+ SR_CONF_LOGIC_ANALYZER,
+ SR_CONF_DEMO_DEV,
+ SR_CONF_SAMPLERATE,
+ SR_CONF_LIMIT_SAMPLES,
+ SR_CONF_LIMIT_MSEC,
+};
+
+static const int devopts_cg[] = {
+ SR_CONF_PATTERN_MODE,
};
-static uint8_t genmode_default[] = {
+static const uint64_t samplerates[] = {
+ SR_HZ(1),
+ SR_GHZ(1),
+ SR_HZ(1),
+};
+
+static 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,
0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
-/* List of struct sigrok_device_instance, maintained by opendev()/closedev(). */
-static GSList *device_instances = NULL;
-static uint64_t cur_samplerate = 0;
-static uint64_t limit_samples = 0;
-static uint64_t limit_msec = 0;
-static int default_genmode = GENMODE_DEFAULT;
-static GThread *my_thread;
-static int thread_running;
+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 void hw_stop_acquisition(int device_index, gpointer session_device_id);
-static int hw_init(char *deviceinfo)
+static int init(struct sr_context *sr_ctx)
{
- struct sigrok_device_instance *sdi;
+ return std_init(sr_ctx, di, LOG_PREFIX);
+}
+
+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 = 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 (ag->pattern) {
+ case PATTERN_SQUARE:
+ value = ANALOG_AMPLITUDE;
+ last_end = 0;
+ for (i = 0; i < num_samples; i++) {
+ if (i % 5 == 0)
+ value = -value;
+ if (i % 10 == 0)
+ last_end = i - 1;
+ ag->pattern_data[i] = value;
+ }
+ ag->num_samples = last_end;
+ break;
- /* Avoid compiler warnings. */
- deviceinfo = deviceinfo;
+ case PATTERN_SINE:
+ frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD;
- sdi = sigrok_device_instance_new(0, ST_ACTIVE, DEMONAME, NULL, NULL);
- if (!sdi)
- return 0;
+ /* 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;
+ }
+}
+
+static GSList *scan(GSList *options)
+{
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ struct sr_dev_inst *sdi;
+ struct sr_channel *ch;
+ struct sr_channel_group *cg;
+ struct sr_config *src;
+ struct analog_gen *ag;
+ GSList *devices, *l;
+ int num_logic_channels, num_analog_channels, pattern, i;
+ char channel_name[16];
+
+ drvc = di->priv;
+
+ 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;
+ }
+ }
+
+ devices = NULL;
+ sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "Demo device", NULL, NULL);
+ if (!sdi) {
+ sr_err("Device instance creation failed.");
+ return NULL;
+ }
+ sdi->driver = di;
+
+ if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
+ sr_err("Device context malloc failed.");
+ return NULL;
+ }
+ devc->cur_samplerate = SR_KHZ(200);
+ devc->limit_samples = 0;
+ devc->limit_msec = 0;
+ devc->step = 0;
+ 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;
+ devc->analog_channel_groups = NULL;
+
+ /* Logic channels, all in one channel group. */
+ if (!(cg = g_try_malloc(sizeof(struct sr_channel_group))))
+ return NULL;
+ 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_channel_new(i, SR_CHANNEL_LOGIC, TRUE, channel_name)))
+ return NULL;
+ sdi->channels = g_slist_append(sdi->channels, ch);
+ cg->channels = g_slist_append(cg->channels, ch);
+ }
+ sdi->channel_groups = g_slist_append(NULL, cg);
+
+ /* 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_channel_new(i + num_logic_channels,
+ SR_CHANNEL_ANALOG, TRUE, channel_name)))
+ return NULL;
+ sdi->channels = g_slist_append(sdi->channels, ch);
+
+ /* Every analog channel gets its own channel group. */
+ if (!(cg = g_try_malloc(sizeof(struct sr_channel_group))))
+ return NULL;
+ cg->name = g_strdup(channel_name);
+ cg->channels = g_slist_append(NULL, ch);
+
+ /* Every channel group gets a generator struct. */
+ if (!(ag = g_try_malloc(sizeof(struct analog_gen))))
+ return NULL;
+ 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;
+ 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);
+
+ if (++pattern == ARRAY_SIZE(analog_pattern_str))
+ pattern = 0;
+ }
- device_instances = g_slist_append(device_instances, sdi);
+ sdi->priv = devc;
+ devices = g_slist_append(devices, sdi);
+ drvc->instances = g_slist_append(drvc->instances, sdi);
- return 1;
+ return devices;
}
-static int hw_opendev(int device_index)
+static GSList *dev_list(void)
{
- /* Avoid compiler warnings. */
- device_index = device_index;
+ return ((struct drv_context *)(di->priv))->instances;
+}
- /* Nothing needed so far. */
- return SIGROK_OK;
+static int dev_open(struct sr_dev_inst *sdi)
+{
+ sdi->status = SR_ST_ACTIVE;
+
+ return SR_OK;
}
-static void hw_closedev(int device_index)
+static int dev_close(struct sr_dev_inst *sdi)
{
- /* Avoid compiler warnings. */
- device_index = device_index;
+ sdi->status = SR_ST_INACTIVE;
- /* Nothing needed so far. */
+ return SR_OK;
}
-static void hw_cleanup(void)
+static int cleanup(void)
{
- /* Nothing needed so far. */
+ return std_dev_clear(di, NULL);
}
-static void *hw_get_device_info(int device_index, int device_info_id)
+static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
{
- struct sigrok_device_instance *sdi;
- void *info = NULL;
+ struct dev_context *devc;
+ struct sr_channel *ch;
+ struct analog_gen *ag;
+ int pattern;
- if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
- return NULL;
+ if (!sdi)
+ return SR_ERR_ARG;
- switch (device_info_id) {
- case DI_INSTANCE:
- info = sdi;
+ devc = sdi->priv;
+ switch (id) {
+ case SR_CONF_SAMPLERATE:
+ *data = g_variant_new_uint64(devc->cur_samplerate);
break;
- case DI_NUM_PROBES:
- info = GINT_TO_POINTER(NUM_PROBES);
+ case SR_CONF_LIMIT_SAMPLES:
+ *data = g_variant_new_uint64(devc->limit_samples);
break;
- case DI_CUR_SAMPLERATE:
- info = &cur_samplerate;
+ case SR_CONF_LIMIT_MSEC:
+ *data = g_variant_new_uint64(devc->limit_msec);
break;
- case DI_PATTERNMODES:
- info = &patternmodes;
+ case SR_CONF_PATTERN_MODE:
+ if (!cg)
+ return SR_ERR_CHANNEL_GROUP;
+ 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 = 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_CHANNELS:
+ *data = g_variant_new_int32(devc->num_logic_channels);
+ break;
+ case SR_CONF_NUM_ANALOG_CHANNELS:
+ *data = g_variant_new_int32(devc->num_analog_channels);
+ break;
+ default:
+ return SR_ERR_NA;
}
- return info;
+ return SR_OK;
}
-static int hw_get_status(int device_index)
+static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
{
- /* Avoid compiler warnings. */
- device_index = device_index;
+ struct dev_context *devc;
+ struct analog_gen *ag;
+ struct sr_channel *ch;
+ int 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 (id) {
+ 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_PATTERN_MODE:
+ if (!cg)
+ return SR_ERR_CHANNEL_GROUP;
+ stropt = g_variant_get_string(data, NULL);
+ ch = cg->channels->data;
+ pattern = -1;
+ if (ch->type == SR_CHANNEL_LOGIC) {
+ for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) {
+ if (!strcmp(stropt, logic_pattern_str[i])) {
+ pattern = i;
+ break;
+ }
+ }
+ if (pattern == -1)
+ return SR_ERR_ARG;
+ devc->logic_pattern = pattern;
+
+ /* Might as well do this now, these are static. */
+ if (pattern == PATTERN_ALL_LOW)
+ memset(devc->logic_data, 0x00, LOGIC_BUFSIZE);
+ else if (pattern == PATTERN_ALL_HIGH)
+ memset(devc->logic_data, 0xff, LOGIC_BUFSIZE);
+ sr_dbg("Setting logic pattern to %s",
+ logic_pattern_str[pattern]);
+ } else if (ch->type == SR_CHANNEL_ANALOG) {
+ for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) {
+ if (!strcmp(stropt, analog_pattern_str[i])) {
+ pattern = i;
+ break;
+ }
+ }
+ if (pattern == -1)
+ return SR_ERR_ARG;
+ 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;
+ default:
+ ret = SR_ERR_NA;
+ }
- return ST_ACTIVE;
+ return ret;
}
-static int *hw_get_capabilities(void)
+static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
{
- return capabilities;
-}
+ struct sr_channel *ch;
+ GVariant *gvar;
+ GVariantBuilder gvb;
-static int hw_set_configuration(int device_index, int capability, void *value)
-{
- int ret;
- uint64_t *tmp_u64;
- char *stropt;
-
- /* Avoid compiler warnings. */
- device_index = device_index;
-
- if (capability == HWCAP_PROBECONFIG) {
- /* Nothing to do. */
- ret = SIGROK_OK;
- } else if (capability == HWCAP_LIMIT_SAMPLES) {
- tmp_u64 = value;
- limit_samples = *tmp_u64;
- ret = SIGROK_OK;
- } else if (capability == HWCAP_LIMIT_MSEC) {
- tmp_u64 = value;
- limit_msec = *tmp_u64;
- ret = SIGROK_OK;
- } else if (capability == HWCAP_PATTERN_MODE) {
- stropt = value;
- if (!strcmp(stropt, "random")) {
- default_genmode = GENMODE_RANDOM;
- ret = SIGROK_OK;
- } else if (!strcmp(stropt, "incremental")) {
- default_genmode = GENMODE_INC;
- ret = SIGROK_OK;
- } else {
- ret = SIGROK_ERR;
+ (void)sdi;
+
+ if (key == SR_CONF_SCAN_OPTIONS) {
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+ scanopts, ARRAY_SIZE(scanopts), sizeof(int32_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_INT32,
+ devopts, ARRAY_SIZE(devopts), sizeof(int32_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 {
- ret = SIGROK_ERR;
+ ch = cg->channels->data;
+ switch (key) {
+ case SR_CONF_DEVICE_OPTIONS:
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+ devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(int32_t));
+ break;
+ case SR_CONF_PATTERN_MODE:
+ 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 ret;
+ return SR_OK;
}
-static void samples_generator(uint8_t *buf, uint64_t size, void *data)
+static void logic_generator(struct sr_dev_inst *sdi, uint64_t size)
{
- struct databag *mydata = data;
- uint64_t p, i;
-
- memset(buf, 0, size);
-
- switch (mydata->sample_generator) {
- case GENMODE_DEFAULT:
- p = 0;
- for (i = 0; i < size; i++) {
- *(buf + i) = ~(genmode_default[p] >> 1);
- if (++p == 64)
- p = 0;
+ 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 GENMODE_RANDOM: /* Random */
+ case PATTERN_RANDOM:
for (i = 0; i < size; i++)
- *(buf + i) = (uint8_t)(rand() & 0xff);
+ devc->logic_data[i] = (uint8_t)(rand() & 0xff);
break;
- case GENMODE_INC: /* Simple increment */
- for (i = 0; i < size; i++)
- *(buf + i) = i;
+ 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;
}
}
-/* Thread function */
-static void thread_func(void *data)
+/* Callback handling data */
+static int prepare_data(int fd, int revents, void *cb_data)
{
- struct databag *mydata = data;
- uint8_t buf[BUFSIZE];
- uint64_t nb_to_send = 0;
- int bytes_written;
- unsigned int msec_elapsed;
-
- while (thread_running) {
- if (limit_samples)
- nb_to_send = limit_samples - mydata->samples_counter;
- else
- nb_to_send = BUFSIZE; /* Continuous mode */
-
- if (limit_msec) {
- msec_elapsed = g_timer_elapsed(mydata->timer, NULL) * 1000;
- if (msec_elapsed > limit_msec)
- nb_to_send = 0;
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
+ struct sr_channel_group *cg;
+ struct analog_gen *ag;
+ GSList *l;
+ uint64_t logic_todo, analog_todo, expected_samplenum, analog_samples, sending_now;
+ int64_t time, elapsed;
+
+ (void)fd;
+ (void)revents;
+
+ sdi = cb_data;
+ devc = sdi->priv;
+
+ /* How many "virtual" samples should we have collected by now? */
+ 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? */
+ 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_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;
+ 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_todo -= sending_now;
+ devc->logic_counter += sending_now;
}
- if (nb_to_send == 0) {
- close(mydata->pipe_fds[1]);
- thread_running = 0;
- hw_stop_acquisition(mydata->device_index,
- mydata->session_device_id);
- } else if (nb_to_send > BUFSIZE) {
- nb_to_send = BUFSIZE;
+ /* Analog, one channel at a time */
+ if (devc->num_analog_channels > 0 && analog_todo > 0) {
+ sending_now = 0;
+ 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;
+
+ /* 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_generator(buf, nb_to_send, data);
- mydata->samples_counter += nb_to_send;
-
- g_io_channel_write_chars(channels[1], (gchar *)&buf,
- nb_to_send, (gsize *)&bytes_written, NULL);
-
- g_usleep(mydata->loop_sleep);
}
-}
-/* Callback handling data */
-static int receive_data(int fd, int revents, void *user_data)
-{
- struct datafeed_packet packet;
- char c[BUFSIZE];
- uint64_t z;
-
- /* Avoid compiler warnings. */
- fd = fd;
- revents = revents;
-
- g_io_channel_read_chars(channels[0], (gchar *)&c, BUFSIZE, &z, NULL);
-
- if (z > 0) {
- packet.type = DF_LOGIC;
- packet.length = z;
- packet.unitsize = 1;
- packet.payload = c;
- session_bus(user_data, &packet);
+ 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;
}
+
return TRUE;
}
-static int hw_start_acquisition(int device_index, gpointer session_device_id)
+static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
- struct datafeed_packet *packet;
- struct datafeed_header *header;
- struct databag *mydata;
-
- mydata = malloc(sizeof(struct databag));
- if (!mydata)
- return SIGROK_ERR_MALLOC;
+ GSList *l;
+ struct dev_context *devc;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR_DEV_CLOSED;
+
+ devc = sdi->priv;
+ 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
+ * demo driver generated data in a thread, and collected and sent the
+ * data in the main program loop.
+ * They are kept here because it provides a convenient way of setting
+ * up a timeout-based polling mechanism.
+ */
+ if (pipe(devc->pipe_fds)) {
+ sr_err("%s: pipe() failed", __func__);
+ return SR_ERR;
+ }
- mydata->sample_generator = default_genmode;
- mydata->session_device_id = session_device_id;
- mydata->device_index = device_index;
- mydata->samples_counter = 0;
- mydata->loop_sleep = 100000;
+ for (l = devc->analog_channel_groups; l; l = l->next) {
+ generate_analog_pattern(l->data, devc->cur_samplerate);
+ }
- if (pipe(mydata->pipe_fds))
- return SIGROK_ERR;
+ devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]);
- channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]);
- channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]);
+ g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
/* Set channel encoding to binary (default is UTF-8). */
- g_io_channel_set_encoding(channels[0], NULL, NULL);
- g_io_channel_set_encoding(channels[1], NULL, NULL);
+ g_io_channel_set_encoding(devc->channel, NULL, NULL);
/* Make channels to unbuffered. */
- g_io_channel_set_buffered(channels[0], FALSE);
- g_io_channel_set_buffered(channels[1], FALSE);
-
- source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40, receive_data,
- session_device_id);
-
- /* Run the demo thread. */
- g_thread_init(NULL);
- if (limit_msec)
- mydata->timer = g_timer_new();
- thread_running = 1;
- my_thread =
- g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL);
- if (!my_thread)
- return SIGROK_ERR;
-
- packet = malloc(sizeof(struct datafeed_packet));
- header = malloc(sizeof(struct datafeed_header));
- if (!packet || !header)
- return SIGROK_ERR_MALLOC;
-
- packet->type = DF_HEADER;
- packet->length = sizeof(struct datafeed_header);
- packet->payload = (unsigned char *)header;
- header->feed_version = 1;
- gettimeofday(&header->starttime, NULL);
- header->samplerate = cur_samplerate;
- header->protocol_id = PROTO_RAW;
- header->num_logic_probes = NUM_PROBES;
- header->num_analog_probes = 0;
- session_bus(session_device_id, packet);
- free(header);
- free(packet);
-
- return SIGROK_OK;
+ g_io_channel_set_buffered(devc->channel, FALSE);
+
+ sr_source_add_channel(devc->channel, G_IO_IN | G_IO_ERR,
+ 40, prepare_data, (void *)sdi);
+
+ /* Send header packet to the session bus. */
+ std_session_send_df_header(cb_data, LOG_PREFIX);
+
+ /* We use this timestamp to decide how many more samples to send. */
+ devc->starttime = g_get_monotonic_time();
+
+ return SR_OK;
}
-static void hw_stop_acquisition(int device_index, gpointer session_device_id)
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
- struct datafeed_packet packet;
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
- /* Avoid compiler warnings. */
- device_index = device_index;
+ (void)cb_data;
+
+ devc = sdi->priv;
+ sr_dbg("Stopping acquisition.");
+
+ sr_source_remove_channel(devc->channel);
+ g_io_channel_shutdown(devc->channel, FALSE, NULL);
+ g_io_channel_unref(devc->channel);
+ devc->channel = NULL;
/* Send last packet. */
- packet.type = DF_END;
- session_bus(session_device_id, &packet);
+ packet.type = SR_DF_END;
+ sr_session_send(sdi, &packet);
+
+ return SR_OK;
}
-struct device_plugin demo_plugin_info = {
- "demo",
- 1,
- hw_init,
- hw_cleanup,
- hw_opendev,
- hw_closedev,
- hw_get_device_info,
- hw_get_status,
- hw_get_capabilities,
- hw_set_configuration,
- hw_start_acquisition,
- hw_stop_acquisition,
+SR_PRIV struct sr_dev_driver demo_driver_info = {
+ .name = "demo",
+ .longname = "Demo driver and pattern generator",
+ .api_version = 1,
+ .init = init,
+ .cleanup = cleanup,
+ .scan = scan,
+ .dev_list = dev_list,
+ .dev_clear = NULL,
+ .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,
+ .priv = NULL,
};
projects / libsigrok.git / blobdiff