* 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"
+#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];
+
struct databag {
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;
};
-static GThread *my_thread;
-static int thread_running;
-
static int capabilities[] = {
HWCAP_LOGIC_ANALYZER,
HWCAP_PATTERN_MODE,
HWCAP_LIMIT_SAMPLES,
+ HWCAP_LIMIT_MSEC,
HWCAP_CONTINUOUS
};
-static char *patternmodes[] = {
+static const char *patternmodes[] = {
"random",
"incremental",
- NULL
+ "sine",
+ NULL,
};
+#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
+
/* 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 = -1;
-static int default_genmode = GENMODE_RANDOM;
-
+static uint64_t cur_samplerate = KHZ(200);
+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;
static void hw_stop_acquisition(int device_index, gpointer session_device_id);
static int *hw_get_capabilities(void)
{
-
return capabilities;
}
device_index = device_index;
if (capability == HWCAP_PROBECONFIG) {
- /* nothing to do */
+ /* 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")) {
} 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;
}
static void samples_generator(uint8_t *buf, uint64_t size, void *data)
{
struct databag *mydata = data;
- uint64_t i;
+ 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);
*(buf + i) = i;
break;
}
+#endif
}
/* Thread function */
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 = limit_samples - mydata->samples_counter;
- else
- nb_to_send = BUFSIZE; // CONTINUOUS MODE
+ 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
+ }
- if (nb_to_send == 0) {
+ /* 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;
- hw_stop_acquisition(mydata->device_index,
- mydata->session_device_id);
- } else if (nb_to_send > BUFSIZE) {
- nb_to_send = BUFSIZE;
}
- samples_generator(buf, nb_to_send, data);
- mydata->samples_counter += nb_to_send;
-
- write(mydata->pipe_fds[1], &buf, nb_to_send);
- g_usleep(mydata->loop_sleep);
+ g_usleep(10);
}
}
static int receive_data(int fd, int revents, void *user_data)
{
struct datafeed_packet packet;
- /* uint16_t samples[1000]; */
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;
- z = read(fd, &c, BUFSIZE);
- if (z > 0) {
- packet.type = DF_LOGIC;
- packet.length = z;
- packet.unitsize = 1;
- packet.payload = c;
+ 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;
}
mydata->session_device_id = session_device_id;
mydata->device_index = device_index;
mydata->samples_counter = 0;
- mydata->loop_sleep = 100000;
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);
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;
static void hw_stop_acquisition(int device_index, gpointer session_device_id)
{
- struct datafeed_packet packet;
-
/* Avoid compiler warnings. */
device_index = device_index;
+ session_device_id = session_device_id;
- /* Send last packet. */
- packet.type = DF_END;
- session_bus(session_device_id, &packet);
-
+ /* Stop generate thread. */
+ thread_running = 0;
}
struct device_plugin demo_plugin_info = {
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