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; }