static struct iio_context *scan(void)
{
struct iio_scan_context *scan_ctx;
struct iio_context_info **info;
struct iio_context *ctx = NULL;
unsigned int i;
ssize_t ret;
scan_ctx = iio_create_scan_context(NULL, 0);
if (!scan_ctx) {
fprintf(stderr, "Unable to create scan context\n");
return NULL;
}
ret = iio_scan_context_get_info_list(scan_ctx, &info);
if (ret < 0) {
char err_str[1024];
iio_strerror(-ret, err_str, sizeof(err_str));
fprintf(stderr, "Scanning for IIO contexts failed: %s\n", err_str);
goto err_free_ctx;
}
if (ret == 0) {
printf("No IIO context found.\n");
goto err_free_info_list;
}
if (ret == 1) {
ctx = iio_create_context_from_uri(iio_context_info_get_uri(info[0]));
} else {
fprintf(stderr, "Multiple contexts found. Please select one using --uri:\n");
for (i = 0; i < (size_t) ret; i++) {
fprintf(stderr, "\t%d: %s [%s]\n", i,
iio_context_info_get_description(info[i]),
iio_context_info_get_uri(info[i]));
}
}
err_free_info_list:
iio_context_info_list_free(info);
err_free_ctx:
iio_scan_context_destroy(scan_ctx);
return ctx;
}
struct iio_context * iio_create_default_context(void)
{
char *hostname = getenv("IIOD_REMOTE");
if (hostname) {
struct iio_context *ctx;
ctx = iio_create_context_from_uri(hostname);
if (ctx)
return ctx;
#ifdef WITH_NETWORK_BACKEND
/* If the environment variable is an empty string, we will
* discover the server using ZeroConf */
if (strlen(hostname) == 0)
hostname = NULL;
return iio_create_network_context(hostname);
#endif
}
return iio_create_local_context();
}
gint main (int argc, char **argv)
{
int c;
char *profile = NULL;
init_signal_handlers(argv[0]);
opterr = 0;
while ((c = getopt (argc, argv, "c:p:u:")) != -1)
switch (c) {
case 'c':
ctx = iio_create_network_context(optarg);
if (!ctx) {
printf("Failed connecting to remote device: %s\n", optarg);
exit(-1);
}
break;
case 'u':
ctx = iio_create_context_from_uri(optarg);
if (!ctx) {
printf("Failed connecting to remote device: %s\n", optarg);
exit(-1);
}
break;
case 'p':
profile = strdup(optarg);
break;
case '?':
usage(argv[0]);
break;
default:
printf("Unknown command line option\n");
usage(argv[0]);
break;
}
#ifndef __MINGW32__
/* XXX: Enabling threading when compiling for Windows will lock the UI
* as soon as the main window is moved. */
gdk_threads_init();
#endif
gtk_init(&argc, &argv);
signal(SIGTERM, sigterm);
signal(SIGINT, sigterm);
#ifndef __MINGW32__
signal(SIGHUP, sigterm);
#endif
gdk_threads_enter();
init_application();
c = load_default_profile(profile, true);
if (!ctx_destroyed_by_do_quit) {
if (!ctx)
connect_dialog(false);
create_default_plot();
if (c == 0) {
if (gtk_check_menu_item_get_active(
GTK_CHECK_MENU_ITEM(versioncheck_en)))
version_check_start(NULL);
gtk_main();
} else
application_quit();
}
gdk_threads_leave();
if (profile)
free(profile);
if (c == 0 || c == -ENOTTY)
return 0;
else
return -1;
}
int main(int argc, char **argv)
{
unsigned int i, nb_channels;
unsigned int buffer_size = SAMPLES_PER_READ;
const char *arg_uri = NULL;
const char *arg_ip = NULL;
int c, option_index = 0;
struct iio_device *dev;
size_t sample_size;
int timeout = -1;
bool scan_for_context = false;
while ((c = getopt_long(argc, argv, "+hn:u:t:b:s:T:a",
options, &option_index)) != -1) {
switch (c) {
case 'h':
usage();
return EXIT_SUCCESS;
case 'n':
arg_ip = optarg;
break;
case 'u':
arg_uri = optarg;
break;
case 'a':
scan_for_context = true;
break;
case 't':
trigger_name = optarg;
break;
case 'b':
buffer_size = atoi(optarg);
break;
case 's':
num_samples = atoi(optarg);
break;
case 'T':
timeout = atoi(optarg);
break;
case '?':
return EXIT_FAILURE;
}
}
if (argc == optind) {
fprintf(stderr, "Incorrect number of arguments.\n\n");
usage();
return EXIT_FAILURE;
}
setup_sig_handler();
if (scan_for_context)
ctx = scan();
else if (arg_uri)
ctx = iio_create_context_from_uri(arg_uri);
else if (arg_ip)
ctx = iio_create_network_context(arg_ip);
else
ctx = iio_create_default_context();
if (!ctx) {
fprintf(stderr, "Unable to create IIO context\n");
return EXIT_FAILURE;
}
if (timeout >= 0)
iio_context_set_timeout(ctx, timeout);
dev = iio_context_find_device(ctx, argv[optind]);
if (!dev) {
fprintf(stderr, "Device %s not found\n", argv[optind]);
iio_context_destroy(ctx);
return EXIT_FAILURE;
}
if (trigger_name) {
struct iio_device *trigger = iio_context_find_device(
ctx, trigger_name);
if (!trigger) {
fprintf(stderr, "Trigger %s not found\n", trigger_name);
iio_context_destroy(ctx);
return EXIT_FAILURE;
}
if (!iio_device_is_trigger(trigger)) {
fprintf(stderr, "Specified device is not a trigger\n");
iio_context_destroy(ctx);
return EXIT_FAILURE;
}
/*
* Fixed rate for now. Try new ABI first,
* fail gracefully to remain compatible.
*/
if (iio_device_attr_write_longlong(trigger,
"sampling_frequency", DEFAULT_FREQ_HZ) < 0)
iio_device_attr_write_longlong(trigger,
"frequency", DEFAULT_FREQ_HZ);
iio_device_set_trigger(dev, trigger);
}
nb_channels = iio_device_get_channels_count(dev);
if (argc == optind + 1) {
/* Enable all channels */
for (i = 0; i < nb_channels; i++)
iio_channel_enable(iio_device_get_channel(dev, i));
} else {
for (i = 0; i < nb_channels; i++) {
unsigned int j;
struct iio_channel *ch = iio_device_get_channel(dev, i);
for (j = optind + 1; j < (unsigned int) argc; j++) {
const char *n = iio_channel_get_name(ch);
if (!strcmp(argv[j], iio_channel_get_id(ch)) ||
(n && !strcmp(n, argv[j])))
iio_channel_enable(ch);
}
}
}
sample_size = iio_device_get_sample_size(dev);
buffer = iio_device_create_buffer(dev, buffer_size, false);
if (!buffer) {
char buf[256];
iio_strerror(errno, buf, sizeof(buf));
fprintf(stderr, "Unable to allocate buffer: %s\n", buf);
iio_context_destroy(ctx);
return EXIT_FAILURE;
}
while (app_running) {
int ret = iio_buffer_refill(buffer);
if (ret < 0) {
if (app_running) {
char buf[256];
iio_strerror(-ret, buf, sizeof(buf));
fprintf(stderr, "Unable to refill buffer: %s\n", buf);
}
break;
}
/* If there are only the samples we requested, we don't need to
* demux */
if (iio_buffer_step(buffer) == sample_size) {
void *start = iio_buffer_start(buffer);
size_t read_len, len = (intptr_t) iio_buffer_end(buffer)
- (intptr_t) start;
if (num_samples && len > num_samples * sample_size)
len = num_samples * sample_size;
for (read_len = len; len; ) {
size_t nb = fwrite(start, 1, len, stdout);
if (!nb)
goto err_destroy_buffer;
len -= nb;
start = (void *)((intptr_t) start + nb);
}
if (num_samples) {
num_samples -= read_len / sample_size;
if (!num_samples)
quit_all(EXIT_SUCCESS);
}
} else {
iio_buffer_foreach_sample(buffer, print_sample, NULL);
}
}
err_destroy_buffer:
iio_buffer_destroy(buffer);
iio_context_destroy(ctx);
return exit_code;
}