* This file is part of the sigrok project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.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
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#define DEMO_ANALOG
+
#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"
-#define NUM_PROBES 8
-#define NUM_TRIGGER_STAGES 4
-#define TRIGGER_TYPES "01"
+#ifdef DEMO_ANALOG
+#define NUM_PROBES 9
+#else
+#define NUM_PROBES 8
+#endif
+#define DEMONAME "Demo device"
+/* size of chunks to send through the session bus */
+#ifdef DEMO_ANALOG
+#define BUFSIZE 32768
+#else
+#define BUFSIZE 4096
+#endif
+
+enum {
+ GENMODE_DEFAULT,
+ GENMODE_RANDOM,
+ GENMODE_INC,
+ GENMODE_SINE,
+};
+
+GIOChannel *channels[2];
-/* Software trigger implementation: positive values indicate trigger stage. */
-#define TRIGGER_FIRED -1
+struct databag {
+ int pipe_fds[2];
+ uint8_t sample_generator;
+ uint8_t thread_running;
+ uint64_t samples_counter;
+ int device_index;
+ gpointer session_device_id;
+ GTimer *timer;
+};
static int capabilities[] = {
HWCAP_LOGIC_ANALYZER,
- HWCAP_SAMPLERATE,
+ HWCAP_PATTERN_MODE,
HWCAP_LIMIT_SAMPLES,
+ HWCAP_LIMIT_MSEC,
+ HWCAP_CONTINUOUS
};
-/* Random selection of samplerates this "device" shall support. */
-static uint64_t supported_samplerates[] = {
- KHZ(100),
- KHZ(500),
- MHZ(1),
- MHZ(2),
- MHZ(12),
- MHZ(24),
- 0,
+static const char *patternmodes[] = {
+ "random",
+ "incremental",
+ "sine",
+ NULL,
};
-static struct samplerates samplerates = {
- KHZ(100),
- MHZ(24),
- 0,
- supported_samplerates,
+#ifndef DEMO_ANALOG
+static uint8_t genmode_default[] = {
+ 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,
};
+#endif
-/* TODO: All of these should go in a device-specific struct. */
-static uint64_t cur_samplerate = 0;
+/* List of struct sigrok_device_instance, maintained by opendev()/closedev(). */
+static GSList *device_instances = NULL;
+static uint64_t cur_samplerate = KHZ(200);
static uint64_t limit_samples = 0;
-// static uint8_t probe_mask = 0;
-// static uint8_t trigger_mask[NUM_TRIGGER_STAGES] = { 0 };
-// static uint8_t trigger_value[NUM_TRIGGER_STAGES] = { 0 };
-// static uint8_t trigger_buffer[NUM_TRIGGER_STAGES] = { 0 };
+static uint64_t limit_msec = 0;
+static int default_genmode = GENMODE_DEFAULT;
+static GThread *my_thread;
+static int thread_running;
-// static int trigger_stage = TRIGGER_FIRED;
-
-static int hw_set_configuration(int device_index, int capability, void *value);
static void hw_stop_acquisition(int device_index, gpointer session_device_id);
-#if 0
-static int configure_probes(GSList *probes)
+static int hw_init(char *deviceinfo)
{
- struct probe *probe;
- GSList *l;
- int probe_bit, stage, i;
- char *tc;
-
- probe_mask = 0;
- for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
- trigger_mask[i] = 0;
- trigger_value[i] = 0;
- }
-
- stage = -1;
- for (l = probes; l; l = l->next) {
- probe = (struct probe *)l->data;
- if (!(probe->enabled))
- continue;
- probe_bit = 1 << (probe->index - 1);
- probe_mask |= probe_bit;
- if (!(probe->trigger))
- continue;
-
- stage = 0;
- for (tc = probe->trigger; *tc; tc++) {
- trigger_mask[stage] |= probe_bit;
- if (*tc == '1')
- trigger_value[stage] |= probe_bit;
- stage++;
- if (stage > NUM_TRIGGER_STAGES)
- return SIGROK_ERR;
- }
- }
+ struct sigrok_device_instance *sdi;
- if (stage == -1)
- /*
- * We didn't configure any triggers, make sure acquisition
- * doesn't wait for any.
- */
- trigger_stage = TRIGGER_FIRED;
- else
- trigger_stage = 0;
+ /* Avoid compiler warnings. */
+ deviceinfo = deviceinfo;
- return SIGROK_OK;
-}
-#endif
+ sdi = sigrok_device_instance_new(0, ST_ACTIVE, DEMONAME, NULL, NULL);
+ if (!sdi)
+ return 0;
-static int hw_init(char *deviceinfo)
-{
- /* Avoid compiler warning. */
- deviceinfo = deviceinfo;
+ device_instances = g_slist_append(device_instances, sdi);
- /* Nothing needed so far. */
- return 1; /* FIXME? */
+ return 1;
}
static int hw_opendev(int device_index)
{
- /* Avoid compiler warning. */
+ /* Avoid compiler warnings. */
device_index = device_index;
/* Nothing needed so far. */
static void hw_closedev(int device_index)
{
- /* Avoid compiler warning. */
+ /* Avoid compiler warnings. */
device_index = device_index;
/* Nothing needed so far. */
static void *hw_get_device_info(int device_index, int device_info_id)
{
+ struct sigrok_device_instance *sdi;
void *info = NULL;
- /* Avoid compiler warning. */
- device_index = device_index;
+ if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
+ return NULL;
switch (device_info_id) {
case DI_INSTANCE:
- /// info = sdi;
- /* TODO */
+ info = sdi;
break;
case DI_NUM_PROBES:
info = GINT_TO_POINTER(NUM_PROBES);
break;
- case DI_SAMPLERATES:
- info = &samplerates;
- break;
- case DI_TRIGGER_TYPES:
- info = TRIGGER_TYPES;
- break;
case DI_CUR_SAMPLERATE:
info = &cur_samplerate;
break;
+ case DI_PATTERNMODES:
+ info = &patternmodes;
+ break;
}
return info;
static int hw_get_status(int device_index)
{
- /* Avoid compiler warning. */
+ /* Avoid compiler warnings. */
device_index = device_index;
- return 0; /* FIXME */
+ return ST_ACTIVE;
}
static int *hw_get_capabilities(void)
static int hw_set_configuration(int device_index, int capability, void *value)
{
int ret;
+ uint64_t *tmp_u64;
+ char *stropt;
- /* Avoid compiler warning. */
+ /* Avoid compiler warnings. */
device_index = device_index;
- if (capability == HWCAP_SAMPLERATE) {
- cur_samplerate = *(uint64_t *)value;
+ if (capability == HWCAP_PROBECONFIG) {
+ /* Nothing to do. */
ret = SIGROK_OK;
- } else if (capability == HWCAP_PROBECONFIG) {
- // ret = configure_probes((GSList *) value);
- ret = SIGROK_ERR;
} else if (capability == HWCAP_LIMIT_SAMPLES) {
- limit_samples = strtoull(value, NULL, 10);
+ 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 if (!strcmp(stropt, "sine")) {
+ default_genmode = GENMODE_SINE;
+ ret = SIGROK_OK;
+ } else {
+ ret = SIGROK_ERR;
+ }
} else {
ret = SIGROK_ERR;
}
return ret;
}
+static void samples_generator(uint8_t *buf, uint64_t size, void *data)
+{
+ struct databag *mydata = data;
+ uint64_t p, i;
+#ifdef DEMO_ANALOG
+ /*
+ * We will simulate a device with 8 logic probes and 1 analog probe.
+ * This fictional device sends the data packed: 8 bits for 8 logic
+ * probes and 16 bits for the analog probe, in this order.
+ * Total of 24 bits.
+ * I could just generate a properly formatted DF_ANALOG packet here,
+ * but I will leave the formatting to receive_data() to make its code
+ * more like a real hardware driver.
+ */
+ memset(buf, 0, size * 3);
+
+ switch (mydata->sample_generator) {
+ default:
+ case GENMODE_DEFAULT:
+ case GENMODE_SINE:
+ for (i = 0; i < size * 3; i += 3) {
+ *(buf + i) = i / 3;
+ *(uint16_t *) (buf + i + 1) =
+ (uint16_t) (sin(i / 3) * 256 * 30);
+ }
+ break;
+ case GENMODE_RANDOM:
+ for (i = 0; i < size * 3; i += 3) {
+ *(buf + i) = (uint8_t)(rand() & 0xff);
+ *(uint16_t *) (buf + i + 1) = (uint16_t)(rand() & 0xffff);
+ }
+ break;
+ case GENMODE_INC:
+ for (i = 0; i < size * 3; i += 3) {
+ *(buf + i) = i / 3;
+ *(uint16_t *)(buf + i + 1) = i / 3 * 256 * 10;
+ }
+ break;
+ }
+#else
+
+ 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;
+ }
+ break;
+ case GENMODE_RANDOM: /* Random */
+ for (i = 0; i < size; i++)
+ *(buf + i) = (uint8_t)(rand() & 0xff);
+ break;
+ case GENMODE_INC: /* Simple increment */
+ for (i = 0; i < size; i++)
+ *(buf + i) = i;
+ break;
+ }
+#endif
+}
+
+/* Thread function */
+static void thread_func(void *data)
+{
+ struct databag *mydata = data;
+ uint8_t buf[BUFSIZE];
+ uint64_t nb_to_send = 0;
+ int bytes_written;
+
+ double time_cur, time_last, time_diff;
+
+ time_last = g_timer_elapsed(mydata->timer, NULL);
+
+ while (thread_running) {
+ /* Rate control */
+ time_cur = g_timer_elapsed(mydata->timer, NULL);
+
+ time_diff = time_cur - time_last;
+ time_last = time_cur;
+
+ nb_to_send = cur_samplerate * time_diff;
+
+ if (limit_samples)
+ nb_to_send = MIN(nb_to_send,
+ limit_samples - mydata->samples_counter);
+
+ /* Make sure we don't overflow. */
+#ifdef DEMO_ANALOG
+ nb_to_send = MIN(nb_to_send, BUFSIZE / 3);
+#else
+ nb_to_send = MIN(nb_to_send, BUFSIZE);
+#endif
+
+ if (nb_to_send) {
+ samples_generator(buf, nb_to_send, data);
+ mydata->samples_counter += nb_to_send;
+#ifdef DEMO_ANALOG
+ g_io_channel_write_chars(channels[1], (gchar *) &buf,
+ nb_to_send * 3, (gsize *) &bytes_written, NULL);
+#else
+ g_io_channel_write_chars(channels[1], (gchar *) &buf,
+ nb_to_send, (gsize *) &bytes_written, NULL);
+#endif
+ }
+
+ /* Check if we're done. */
+ if ((limit_msec && time_cur * 1000 > limit_msec) ||
+ (limit_samples && mydata->samples_counter >= limit_samples))
+ {
+ close(mydata->pipe_fds[1]);
+ thread_running = 0;
+ }
+
+ g_usleep(10);
+ }
+}
+
+/* Callback handling data */
+static int receive_data(int fd, int revents, void *user_data)
+{
+ struct datafeed_packet packet;
+ char c[BUFSIZE];
+ uint64_t z;
+#ifdef DEMO_ANALOG
+ struct analog_sample *sample;
+ unsigned int i, x;
+ int sample_size = sizeof(struct analog_sample) +
+ (NUM_PROBES * sizeof(struct analog_probe));
+ char *buf;
+#endif
+
+ /* Avoid compiler warnings. */
+ fd = fd;
+ revents = revents;
+
+ do {
+ g_io_channel_read_chars(channels[0],
+ (gchar *) &c, BUFSIZE, (gsize *) &z, NULL);
+
+ if (z > 0) {
+#ifdef DEMO_ANALOG
+ packet.type = DF_ANALOG;
+
+ packet.length = (z / 3) * sample_size;
+ packet.unitsize = sample_size;
+
+ buf = malloc(sample_size * packet.length);
+ if (!buf)
+ return FALSE;
+
+ /* Craft our packet. */
+ for (i = 0; i < z / 3; i++) {
+ sample = (struct analog_sample *) (buf + (i * sample_size));
+ sample->num_probes = NUM_PROBES;
+
+ /* 8 Logic probes */
+ for (x = 0; x < NUM_PROBES - 1; x++) {
+ sample->probes[x].val =
+ (c[i * 3] >> x) & 1;
+ sample->probes[x].res = 1;
+ }
+
+ /* 1 Analog probe, 16 bit adc */
+ for (; x < NUM_PROBES; x++) {
+ sample->probes[x].val =
+ *(uint16_t *) (c + i * 3 + 1);
+ sample->probes[x].val &= ((1 << 16) - 1);
+ sample->probes[x].res = 16;
+ }
+
+ }
+
+ packet.payload = buf;
+ session_bus(user_data, &packet);
+ free(buf);
+#else
+ packet.type = DF_LOGIC;
+ packet.length = z;
+ packet.unitsize = 1;
+ packet.payload = c;
+ session_bus(user_data, &packet);
+#endif
+ }
+ } while (z > 0);
+
+ if (!thread_running && z <= 0)
+ {
+ /* Make sure we don't receive more packets */
+ g_io_channel_close(channels[0]);
+
+ /* Send last packet. */
+ packet.type = DF_END;
+ session_bus(user_data, &packet);
+
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
static int hw_start_acquisition(int device_index, gpointer session_device_id)
{
struct datafeed_packet *packet;
struct datafeed_header *header;
- unsigned char *buf;
+ struct databag *mydata;
- /* Avoid compiler warning. */
- device_index = device_index;
+ mydata = malloc(sizeof(struct databag));
+ if (!mydata)
+ return SIGROK_ERR_MALLOC;
+
+ mydata->sample_generator = default_genmode;
+ mydata->session_device_id = session_device_id;
+ mydata->device_index = device_index;
+ mydata->samples_counter = 0;
+
+ if (pipe(mydata->pipe_fds))
+ return SIGROK_ERR;
+
+ channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]);
+ channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]);
+
+ /* 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);
+
+ /* 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);
+ 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));
- buf = malloc(2048);
- if (!packet || !header || !buf)
+ if (!packet || !header)
return SIGROK_ERR_MALLOC;
- /* FIXME */
- memset(buf, 0x55, 2048);
-
packet->type = DF_HEADER;
packet->length = sizeof(struct datafeed_header);
packet->payload = (unsigned char *)header;
+#ifdef DEMO_ANALOG
+ packet->unitsize = sizeof(struct analog_sample) +
+ (NUM_PROBES * sizeof(struct analog_probe));
+#endif
header->feed_version = 1;
gettimeofday(&header->starttime, NULL);
header->samplerate = cur_samplerate;
header->protocol_id = PROTO_RAW;
- header->num_probes = NUM_PROBES;
+ header->num_logic_probes = NUM_PROBES;
+ header->num_analog_probes = 0;
session_bus(session_device_id, packet);
free(header);
free(packet);
return SIGROK_OK;
}
-#if 0
-void receive_transfer(struct libusb_transfer *transfer)
-{
- static int num_samples = 0;
- static int empty_transfer_count = 0;
- struct datafeed_packet packet;
- void *user_data;
- int cur_buflen, trigger_offset, i;
- unsigned char *cur_buf, *new_buf;
-
- g_message("receive_transfer(): status %d received %d bytes",
- transfer->status, transfer->actual_length);
-
- /* Save incoming transfer before reusing the transfer struct. */
- cur_buf = transfer->buffer;
- cur_buflen = transfer->actual_length;
- user_data = transfer->user_data;
-
- /* Fire off a new request. */
- new_buf = g_malloc(4096);
- transfer->buffer = new_buf;
- transfer->length = 4096;
- if (libusb_submit_transfer(transfer) != 0) {
- /* TODO: Stop session? */
- g_warning("eek");
- }
-
- trigger_offset = 0;
- if (trigger_stage >= 0) {
- for (i = 0; i < cur_buflen; i++) {
- trigger_helper(i, cur_buf, &packet, user_data,
- &trigger_offset);
- }
- }
-
- if (trigger_stage == TRIGGER_FIRED) {
- /* Send the incoming transfer to the session bus. */
- packet.type = DF_LOGIC8;
- packet.length = cur_buflen - trigger_offset;
- packet.payload = cur_buf + trigger_offset;
- session_bus(user_data, &packet);
- free(cur_buf);
-
- num_samples += cur_buflen;
- if ((unsigned int)num_samples > limit_samples) {
- hw_stop_acquisition(-1, user_data);
- }
- } else {
- /*
- * TODO: Buffer pre-trigger data in capture
- * ratio-sized buffer.
- */
- }
-}
-#endif
-
-/* This stops acquisition on ALL devices, ignoring device_index. */
static void hw_stop_acquisition(int device_index, gpointer session_device_id)
{
- struct datafeed_packet packet;
-
- /* QUICK HACK */
+ /* Avoid compiler warnings. */
device_index = device_index;
+ session_device_id = session_device_id;
- packet.type = DF_END;
- session_bus(session_device_id, &packet);
-
- /// receive_transfer(NULL);
-
- /* TODO: Need to cancel and free any queued up transfers. */
+ /* Stop generate thread. */
+ thread_running = 0;
}
struct device_plugin demo_plugin_info = {
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