#include <unistd.h>
#include <string.h>
#include <sigrok.h>
+#include <sigrok-internal.h>
#ifdef _WIN32
#include <io.h>
#include <fcntl.h>
/* size of chunks to send through the session bus */
#define BUFSIZE 4096
+/* Supported patterns which we can generate */
enum {
- GENMODE_DEFAULT,
- GENMODE_RANDOM,
- GENMODE_INC,
+ /**
+ * Pattern which spells "sigrok" using '0's (with '1's as "background")
+ * when displayed using the 'bits' output format.
+ */
+ PATTERN_SIGROK,
+
+ /**
+ * Pattern which consists of (pseudo-)random values on all probes.
+ */
+ PATTERN_RANDOM,
+
+ /**
+ * Pattern which consists of incrementing numbers.
+ * TODO: Better description.
+ */
+ PATTERN_INC,
};
+/* FIXME: Should not be global. */
GIOChannel *channels[2];
struct databag {
uint8_t thread_running;
uint64_t samples_counter;
int device_index;
- int loop_sleep;
gpointer session_device_id;
GTimer *timer;
};
static int capabilities[] = {
- HWCAP_LOGIC_ANALYZER,
- HWCAP_PATTERN_MODE,
- HWCAP_LIMIT_SAMPLES,
- HWCAP_LIMIT_MSEC,
- HWCAP_CONTINUOUS
+ SR_HWCAP_LOGIC_ANALYZER,
+ SR_HWCAP_SAMPLERATE,
+ SR_HWCAP_PATTERN_MODE,
+ SR_HWCAP_LIMIT_SAMPLES,
+ SR_HWCAP_LIMIT_MSEC,
+ SR_HWCAP_CONTINUOUS,
};
-static const char *patternmodes[] = {
+static struct sr_samplerates samplerates = {
+ SR_HZ(1),
+ SR_GHZ(1),
+ SR_HZ(1),
+ NULL,
+};
+
+static const char *pattern_strings[] = {
"random",
"incremental",
NULL,
};
-static uint8_t genmode_default[] = {
+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(). */
+/* List of struct sr_device_instance, maintained by opendev()/closedev(). */
static GSList *device_instances = NULL;
-static uint64_t cur_samplerate = 0;
+static uint64_t cur_samplerate = SR_KHZ(200);
static uint64_t limit_samples = 0;
static uint64_t limit_msec = 0;
-static int default_genmode = GENMODE_DEFAULT;
+static int default_pattern = PATTERN_SIGROK;
static GThread *my_thread;
static int thread_running;
static void hw_stop_acquisition(int device_index, gpointer session_device_id);
-static int hw_init(char *deviceinfo)
+static int hw_init(const char *deviceinfo)
{
- struct sigrok_device_instance *sdi;
+ struct sr_device_instance *sdi;
/* Avoid compiler warnings. */
deviceinfo = deviceinfo;
- sdi = sigrok_device_instance_new(0, ST_ACTIVE, DEMONAME, NULL, NULL);
+ sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
if (!sdi)
return 0;
device_index = device_index;
/* Nothing needed so far. */
- return SIGROK_OK;
+
+ return SR_OK;
}
-static void hw_closedev(int device_index)
+static int hw_closedev(int device_index)
{
/* Avoid compiler warnings. */
device_index = device_index;
/* Nothing needed so far. */
+
+ return SR_OK;
}
static void hw_cleanup(void)
static void *hw_get_device_info(int device_index, int device_info_id)
{
- struct sigrok_device_instance *sdi;
+ struct sr_device_instance *sdi;
void *info = NULL;
- if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
+ if (!(sdi = sr_get_device_instance(device_instances, device_index)))
return NULL;
switch (device_info_id) {
- case DI_INSTANCE:
+ case SR_DI_INSTANCE:
info = sdi;
break;
- case DI_NUM_PROBES:
+ case SR_DI_NUM_PROBES:
info = GINT_TO_POINTER(NUM_PROBES);
break;
- case DI_CUR_SAMPLERATE:
+ case SR_DI_SAMPLERATES:
+ info = &samplerates;
+ break;
+ case SR_DI_CUR_SAMPLERATE:
info = &cur_samplerate;
break;
- case DI_PATTERNMODES:
- info = &patternmodes;
+ case SR_DI_PATTERNMODES:
+ info = &pattern_strings;
break;
}
/* Avoid compiler warnings. */
device_index = device_index;
- return ST_ACTIVE;
+ return SR_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 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) {
+ if (capability == SR_HWCAP_PROBECONFIG) {
+ /* Nothing to do, but must be supported */
+ ret = SR_OK;
+ } else if (capability == SR_HWCAP_SAMPLERATE) {
+ cur_samplerate = *(uint64_t *)value;
+ sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
+ cur_samplerate);
+ ret = SR_OK;
+ } else if (capability == SR_HWCAP_LIMIT_SAMPLES) {
+ limit_samples = *(uint64_t *)value;
+ sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
+ limit_samples);
+ ret = SR_OK;
+ } else if (capability == SR_HWCAP_LIMIT_MSEC) {
+ limit_msec = *(uint64_t *)value;
+ sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
+ limit_msec);
+ ret = SR_OK;
+ } else if (capability == SR_HWCAP_PATTERN_MODE) {
stropt = value;
if (!strcmp(stropt, "random")) {
- default_genmode = GENMODE_RANDOM;
- ret = SIGROK_OK;
+ default_pattern = PATTERN_RANDOM;
+ ret = SR_OK;
} else if (!strcmp(stropt, "incremental")) {
- default_genmode = GENMODE_INC;
- ret = SIGROK_OK;
+ default_pattern = PATTERN_INC;
+ ret = SR_OK;
} else {
- ret = SIGROK_ERR;
+ ret = SR_ERR;
}
+ sr_dbg("demo: %s: setting pattern to %d", __func__,
+ default_pattern);
} else {
- ret = SIGROK_ERR;
+ ret = SR_ERR;
}
return ret;
static void samples_generator(uint8_t *buf, uint64_t size, void *data)
{
+ static uint64_t p = 0;
struct databag *mydata = data;
- uint64_t p, i;
+ uint64_t i;
memset(buf, 0, size);
switch (mydata->sample_generator) {
- case GENMODE_DEFAULT:
- p = 0;
+ case PATTERN_SIGROK:
for (i = 0; i < size; i++) {
- *(buf + i) = ~(genmode_default[p] >> 1);
+ *(buf + i) = ~(pattern_sigrok[p] >> 1);
if (++p == 64)
p = 0;
}
break;
- case GENMODE_RANDOM: /* Random */
+ case PATTERN_RANDOM: /* Random */
for (i = 0; i < size; i++)
*(buf + i) = (uint8_t)(rand() & 0xff);
break;
- case GENMODE_INC: /* Simple increment */
+ case PATTERN_INC: /* Simple increment */
for (i = 0; i < size; i++)
*(buf + i) = i;
break;
uint8_t buf[BUFSIZE];
uint64_t nb_to_send = 0;
int bytes_written;
- unsigned int msec_elapsed;
+
+ 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 */
-
- if (limit_msec) {
- msec_elapsed = g_timer_elapsed(mydata->timer, NULL) * 1000;
- if (msec_elapsed > limit_msec)
- nb_to_send = 0;
+ nb_to_send = MIN(nb_to_send,
+ limit_samples - mydata->samples_counter);
+
+ /* Make sure we don't overflow. */
+ nb_to_send = MIN(nb_to_send, BUFSIZE);
+
+ if (nb_to_send) {
+ 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);
}
- 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;
-
- g_io_channel_write_chars(channels[1], (gchar *)&buf,
- nb_to_send, (gsize *)&bytes_written, NULL);
-
- g_usleep(mydata->loop_sleep);
+ g_usleep(10);
}
}
/* Callback handling data */
static int receive_data(int fd, int revents, void *user_data)
{
- struct datafeed_packet packet;
+ struct sr_datafeed_packet packet;
char c[BUFSIZE];
- uint64_t z;
+ gsize z;
/* Avoid compiler warnings. */
fd = fd;
revents = revents;
- g_io_channel_read_chars(channels[0], (gchar *)&c, BUFSIZE, &z, NULL);
+ do {
+ g_io_channel_read_chars(channels[0],
+ (gchar *)&c, BUFSIZE, &z, NULL);
+
+ if (z > 0) {
+ packet.type = SR_DF_LOGIC;
+ packet.length = z;
+ packet.unitsize = 1;
+ packet.payload = c;
+ sr_session_bus(user_data, &packet);
+ }
+ } 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 = SR_DF_END;
+ sr_session_bus(user_data, &packet);
- if (z > 0) {
- packet.type = DF_LOGIC;
- packet.length = z;
- packet.unitsize = 1;
- packet.payload = c;
- 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;
+ struct sr_datafeed_packet *packet;
+ struct sr_datafeed_header *header;
struct databag *mydata;
- mydata = malloc(sizeof(struct databag));
- if (!mydata)
- return SIGROK_ERR_MALLOC;
+ /* TODO: 'mydata' is never g_free()'d? */
+ if (!(mydata = g_try_malloc(sizeof(struct databag)))) {
+ sr_err("demo: %s: mydata malloc failed", __func__);
+ return SR_ERR_MALLOC;
+ }
- mydata->sample_generator = default_genmode;
+ mydata->sample_generator = default_pattern;
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;
+ return SR_ERR;
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_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);
+ sr_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();
+ /* this needs to be done between g_thread_init() and g_thread_create() */
+ 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;
+ return SR_ERR;
+
+ if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
+ sr_err("demo: %s: packet malloc failed", __func__);
+ return SR_ERR_MALLOC;
+ }
- packet = malloc(sizeof(struct datafeed_packet));
- header = malloc(sizeof(struct datafeed_header));
- if (!packet || !header)
- return SIGROK_ERR_MALLOC;
+ if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
+ sr_err("demo: %s: header malloc failed", __func__);
+ return SR_ERR_MALLOC;
+ }
- packet->type = DF_HEADER;
- packet->length = sizeof(struct datafeed_header);
+ packet->type = SR_DF_HEADER;
+ packet->length = sizeof(struct sr_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->protocol_id = SR_PROTO_RAW;
header->num_logic_probes = NUM_PROBES;
header->num_analog_probes = 0;
- session_bus(session_device_id, packet);
- free(header);
- free(packet);
+ sr_session_bus(session_device_id, packet);
+ g_free(header);
+ g_free(packet);
- return SIGROK_OK;
+ return SR_OK;
}
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 = {
- "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,
+struct sr_device_plugin demo_plugin_info = {
+ .name = "demo",
+ .longname = "Demo driver and pattern generator",
+ .api_version = 1,
+ .init = hw_init,
+ .cleanup = hw_cleanup,
+ .opendev = hw_opendev,
+ .closedev = hw_closedev,
+ .get_device_info = hw_get_device_info,
+ .get_status = hw_get_status,
+ .get_capabilities = hw_get_capabilities,
+ .set_configuration = hw_set_configuration,
+ .start_acquisition = hw_start_acquisition,
+ .stop_acquisition = hw_stop_acquisition,
};
projects / libsigrok.git / blobdiff