From d9fb676d28ed3720807a9e2580e51bc407599e6a Mon Sep 17 00:00:00 2001 From: Pawel Szewczyk Date: Tue, 19 May 2015 10:48:11 +0200 Subject: [PATCH] libusbgx: examples: add example of midi function usage Support for midi function was recently added. This commit adds an example program which shows how to create midi gadget with this function. Signed-off-by: Pawel Szewczyk [Update description] Signed-off-by: Krzysztof Opasiak --- examples/Makefile.am | 2 +- examples/gadget-midi.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 119 insertions(+), 1 deletion(-) create mode 100644 examples/gadget-midi.c diff --git a/examples/Makefile.am b/examples/Makefile.am index 21b00d4..8c2acb2 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -1,4 +1,4 @@ -bin_PROGRAMS = show-gadgets gadget-acm-ecm gadget-vid-pid-remove gadget-ffs gadget-export gadget-import show-udcs gadget-ms +bin_PROGRAMS = show-gadgets gadget-acm-ecm gadget-vid-pid-remove gadget-ffs gadget-export gadget-import show-udcs gadget-ms gadget-midi gadget_acm_ecm_SOURCES = gadget-acm-ecm.c show_gadgets_SOURCES = show-gadgets.c gadget_vid_pid_remove_SOURCES = gadget-vid-pid-remove.c diff --git a/examples/gadget-midi.c b/examples/gadget-midi.c new file mode 100644 index 0000000..44699f3 --- /dev/null +++ b/examples/gadget-midi.c @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2014 Samsung Electronics + * + * Pawel Szewczyk + * + * 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. + */ + +#include +#include +#include + +#define VENDOR 0x1d6b +#define PRODUCT 0x0104 + +int main() { + usbg_state *s; + usbg_gadget *g; + usbg_config *c; + usbg_function *f_midi; + int ret = -EINVAL; + int usbg_ret; + + usbg_gadget_attrs g_attrs = { + 0x0200, /* bcdUSB */ + 0x00, /* Defined at interface level */ + 0x00, /* subclass */ + 0x00, /* device protocol */ + 0x0040, /* Max allowed packet size */ + VENDOR, + PRODUCT, + 0x0001, /* Verson of device */ + }; + + usbg_gadget_strs g_strs = { + "0123456789", /* Serial number */ + "Foo Inc.", /* Manufacturer */ + "Bar Gadget" /* Product string */ + }; + + usbg_config_strs c_strs = { + "1xMIDI" + }; + + usbg_function_attrs f_attrs = { + .header.attrs_type = USBG_F_ATTRS_MIDI, + .attrs.midi = { + .index = 0, + .id = "usb0", + .buflen = 128, + .qlen = 16, + .in_ports = 2, + .out_ports = 3, + }, + }; + + usbg_ret = usbg_init("/sys/kernel/config", &s); + if (usbg_ret != USBG_SUCCESS) { + fprintf(stderr, "Error on usbg init\n"); + fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret), + usbg_strerror(usbg_ret)); + goto out1; + } + + usbg_ret = usbg_create_gadget(s, "g1", &g_attrs, &g_strs, &g); + if (usbg_ret != USBG_SUCCESS) { + fprintf(stderr, "Error creating gadget\n"); + fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret), + usbg_strerror(usbg_ret)); + goto out2; + } + usbg_ret = usbg_create_function(g, F_MIDI, "usb0", &f_attrs, &f_midi); + if (usbg_ret != USBG_SUCCESS) { + fprintf(stderr, "Error creating function\n"); + fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret), + usbg_strerror(usbg_ret)); + goto out2; + } + + usbg_ret = usbg_create_config(g, 1, "The only one", NULL, &c_strs, &c); + if (usbg_ret != USBG_SUCCESS) { + fprintf(stderr, "Error creating config\n"); + fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret), + usbg_strerror(usbg_ret)); + goto out2; + } + + usbg_ret = usbg_add_config_function(c, "some_name", f_midi); + if (usbg_ret != USBG_SUCCESS) { + fprintf(stderr, "Error adding function\n"); + fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret), + usbg_strerror(usbg_ret)); + goto out2; + } + + usbg_ret = usbg_enable_gadget(g, DEFAULT_UDC); + if (usbg_ret != USBG_SUCCESS) { + fprintf(stderr, "Error enabling gadget\n"); + fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret), + usbg_strerror(usbg_ret)); + goto out2; + } + + ret = 0; +out2: + usbg_cleanup(s); + +out1: + return ret; +} -- 2.7.4