*/
#include <stdlib.h>
+#include <unistd.h>
#include <string.h>
#include <sigrok.h>
#include "config.h"
+#define BUFSIZE 4096
+
#define NUM_PROBES 8
#define NUM_TRIGGER_STAGES 4
#define TRIGGER_TYPES "01"
/* Software trigger implementation: positive values indicate trigger stage. */
#define TRIGGER_FIRED -1
+#define USB_MODEL_NAME "Demo Driver"
+#define USB_VENDOR_NAME "Sigrok project"
+#define USB_MODEL_VERSION "v1.0"
+
+#define GENMODE_RANDOM 1
+#define GENMODE_INC 2
+
+static GThread *my_thread;
+static int thread_running;
+
static int capabilities[] = {
HWCAP_LOGIC_ANALYZER,
HWCAP_SAMPLERATE,
supported_samplerates,
};
+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;
+};
+
+/* List of struct sigrok_device_instance, maintained by opendev()/closedev(). */
+static GSList *device_instances = NULL;
+
/* TODO: All of these should go in a device-specific struct. */
static uint64_t cur_samplerate = 0;
static uint64_t limit_samples = 0;
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)
-{
- 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;
- }
- }
-
- 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;
-
- return SIGROK_OK;
-}
-#endif
-
static int hw_init(char *deviceinfo)
{
/* Avoid compiler warning. */
deviceinfo = deviceinfo;
- /* Nothing needed so far. */
- return 1; /* FIXME? */
+ struct sigrok_device_instance *sdi;
+
+ sdi = sigrok_device_instance_new(0, ST_ACTIVE,
+ USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
+
+ if (!sdi)
+ return 0;
+ device_instances = g_slist_append(device_instances, sdi);
+
+ return 1;
}
static int hw_opendev(int device_index)
static void *hw_get_device_info(int device_index, int device_info_id)
{
- void *info = NULL;
-
/* Avoid compiler warning. */
device_index = device_index;
+ struct sigrok_device_instance *sdi;
+ void *info = NULL;
+
+ 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);
{
/* Avoid compiler warning. */
device_index = device_index;
-
return 0; /* FIXME */
}
static int hw_set_configuration(int device_index, int capability, void *value)
{
int ret;
+ uint64_t *tmp_u64;
/* Avoid compiler warning. */
device_index = device_index;
if (capability == HWCAP_SAMPLERATE) {
- cur_samplerate = *(uint64_t *)value;
+ cur_samplerate = *(uint64_t *) value;
ret = SIGROK_OK;
} else if (capability == HWCAP_PROBECONFIG) {
- // ret = configure_probes((GSList *) value);
- ret = SIGROK_ERR;
+ // ret = configure_probes((GSList *) value); FIXME
+ ret = SIGROK_OK;
} else if (capability == HWCAP_LIMIT_SAMPLES) {
- limit_samples = strtoull(value, NULL, 10);
+ tmp_u64 = value;
+ limit_samples = *tmp_u64;
ret = SIGROK_OK;
} else {
ret = SIGROK_ERR;
return ret;
}
+static void samples_generator(uint8_t *buf, uint64_t sz, void *data)
+{
+ struct databag *mydata = data;
+ uint64_t i;
+ uint8_t val;
+
+ memset(buf, 0, sz);
+
+ switch (mydata->sample_generator) {
+ case GENMODE_RANDOM: /* Random */
+ for (i = 0; i < sz; i++) {
+ val = rand() & 0xff;
+ *(buf + i) = val;
+ }
+ break;
+ case GENMODE_INC: /* Simple increment */
+ for (i = 0; i < sz; i++)
+ *(buf + i) = i;
+ break;
+ }
+}
+
+/* Thread function */
+static void thread_func(void *data)
+{
+ struct databag *mydata = data;
+ uint8_t buf[BUFSIZE];
+ uint64_t nb_to_send = 0;
+
+ while (thread_running) {
+ nb_to_send = limit_samples - mydata->samples_counter;
+
+ 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;
+ }
+
+ 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);
+ }
+}
+
+/* Callback handling data */
+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;
+
+ /* Avoid compiler warnings. */
+ revents = revents;
+
+ z = read(fd, &c, BUFSIZE);
+ if (z > 0) {
+ packet.type = DF_LOGIC8;
+ packet.length = z;
+ packet.payload = c;
+ session_bus(user_data, &packet);
+ }
+ 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));
+ /* TODO: Error handling. */
+
+ mydata->sample_generator = GENMODE_RANDOM;
+ 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)) {
+ fprintf(stderr, "Pipe failed.\n");
+ return SIGROK_ERR_MALLOC; /* FIXME */
+
+ }
+ 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);
+ thread_running = 1;
+ my_thread =
+ g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL);
+ if (!my_thread) {
+ fprintf(stderr, "demo: Thread creation failed.\n");
+ return SIGROK_ERR_MALLOC; /* FIXME */
+ }
packet = malloc(sizeof(struct datafeed_packet));
header = malloc(sizeof(struct datafeed_header));
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)
{
/* QUICK HACK */
device_index = device_index;
+ /* Send last packet. */
packet.type = DF_END;
session_bus(session_device_id, &packet);
-
- /// receive_transfer(NULL);
-
- /* TODO: Need to cancel and free any queued up transfers. */
}
struct device_plugin demo_plugin_info = {
projects / libsigrok.git / commitdiff