From 915152c0bd0466f6030ac8fc1b9b713b2286d0fe Mon Sep 17 00:00:00 2001 From: Krzysztof Opasiak Date: Thu, 11 Sep 2014 20:48:08 +0200 Subject: [PATCH] libusbgx: Add example how to use usbg_udc structure This example shows how to learn what udcs are available in system and also how to find out what gadgets are enabled on them. Signed-off-by: Krzysztof Opasiak --- examples/Makefile.am | 3 ++- examples/show-udcs.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 63 insertions(+), 1 deletion(-) create mode 100644 examples/show-udcs.c diff --git a/examples/Makefile.am b/examples/Makefile.am index ce28970..a77a02f 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -1,9 +1,10 @@ -bin_PROGRAMS = show-gadgets gadget-acm-ecm gadget-vid-pid-remove gadget-ffs gadget-export gadget-import +bin_PROGRAMS = show-gadgets gadget-acm-ecm gadget-vid-pid-remove gadget-ffs gadget-export gadget-import show-udcs gadget_acm_ecm_SOURCES = gadget-acm-ecm.c show_gadgets_SOURCES = show-gadgets.c gadget_vid_pid_remove_SOURCES = gadget-vid-pid-remove.c gadget_ffs_SOURCES = gadget-ffs.c gadget_export_SOURCE = gadget-export.c gadget_import_SOURCE = gadget-import.c +show_udcs_SOURCE = show-udcs.c AM_CPPFLAGS=-I$(top_srcdir)/include/ AM_LDFLAGS=-L../src/ -lusbgx diff --git a/examples/show-udcs.c b/examples/show-udcs.c new file mode 100644 index 0000000..66e950f --- /dev/null +++ b/examples/show-udcs.c @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2014 Samsung Electronics + * + * Krzysztof Opasiak + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/** + * @file show-udcs.c + * @example show-udcs.c + * This is an example of how to learn about UDCs available in system + * and find out what gadget are enabled on them. + */ + +#include +#include +#include + +int main(void) +{ + int usbg_ret; + int ret = -EINVAL; + usbg_state *s; + usbg_gadget *g; + usbg_udc *u; + const char *udc_name, *gadget_name; + + usbg_ret = usbg_init("/sys/kernel/config", &s); + if (usbg_ret != USBG_SUCCESS) { + fprintf(stderr, "Error on USB state init\n"); + fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret), + usbg_strerror(usbg_ret)); + goto out; + } + + usbg_for_each_udc(u, s) { + udc_name = usbg_get_udc_name(u); + g = usbg_get_udc_gadget(u); + if (g) + /* some gadget is enabled */ + gadget_name = usbg_get_gadget_name(g); + else + gadget_name = ""; + + fprintf(stdout, "%s <-> %s\n", udc_name, gadget_name); + } + + ret = 0; + usbg_cleanup(s); +out: + return ret; +} -- 2.7.4