This is an example of how to create an UVC gadget device.
#include <errno.h>
#include <stdio.h>
#include <sys/sysmacros.h>
#include <linux/usb/ch9.h>
#include <usbg/function/uvc.h>
#define VENDOR 0x1d6b
#define PRODUCT 0x0104
int main(void)
{
int ret = -EINVAL;
int usbg_ret;
.bDeviceClass = USB_CLASS_PER_INTERFACE,
.bDeviceSubClass = 0x00,
.bDeviceProtocol = 0x00,
.bMaxPacketSize0 = 64,
.idVendor = VENDOR,
.idProduct = PRODUCT,
.bcdDevice = 0x0001,
};
.manufacturer = "Foo Inc.",
.product = "Bar Gadget"
};
};
struct usbg_f_uvc_frame_attrs uvc_frame_attrs_array[] = {
{
.bFrameIndex = 1,
.dwFrameInterval = 2000000,
.wHeight = 480,
.wWidth = 640,
}, {
.bFrameIndex = 2,
.dwFrameInterval = 2000000,
.wHeight = 1080,
.wWidth = 1920,
}, {
.bFrameIndex = 3,
.dwFrameInterval = 333333,
.wHeight = 1080,
.wWidth = 1920,
}, {
.bFrameIndex = 4,
.dwFrameInterval = 333333,
.wHeight = 2160,
.wWidth = 3840,
}
};
struct usbg_f_uvc_frame_attrs *uvc_frame_mjpeg_attrs[] = {
&uvc_frame_attrs_array[0],
&uvc_frame_attrs_array[1],
&uvc_frame_attrs_array[2],
&uvc_frame_attrs_array[3],
NULL,
};
struct usbg_f_uvc_frame_attrs *uvc_frame_uncompressed_attrs[] = {
&uvc_frame_attrs_array[0],
&uvc_frame_attrs_array[1],
&uvc_frame_attrs_array[2],
&uvc_frame_attrs_array[3],
NULL,
};
struct usbg_f_uvc_format_attrs uvc_format_attrs_array[] = {
{
.frames = uvc_frame_mjpeg_attrs,
.format = "mjpeg/m",
.bDefaultFrameIndex = 3,
}, {
.frames = uvc_frame_uncompressed_attrs,
.format = "uncompressed/u",
.bDefaultFrameIndex = 2,
}
};
struct usbg_f_uvc_format_attrs *uvc_format_attrs[] = {
&uvc_format_attrs_array[0],
&uvc_format_attrs_array[1],
NULL,
};
struct usbg_f_uvc_attrs uvc_attrs = {
.formats = uvc_format_attrs,
};
usbg_ret =
usbg_init(
"/sys/kernel/config", &s);
if (usbg_ret != USBG_SUCCESS) {
fprintf(stderr, "Error on USB gadget init\n");
goto out1;
}
if (usbg_ret != USBG_SUCCESS) {
fprintf(stderr, "Error on create gadget\n");
goto out2;
}
if(usbg_ret != USBG_SUCCESS)
{
fprintf(stderr, "Error creating uvc function\n");
goto out2;
}
if (usbg_ret != USBG_SUCCESS) {
fprintf(stderr, "Error creating config\n");
goto out2;
}
if (usbg_ret != USBG_SUCCESS) {
fprintf(stderr, "Error adding acm.GS0\n");
goto out2;
}
if (usbg_ret != USBG_SUCCESS) {
fprintf(stderr, "Error enabling gadget\n");
goto out2;
}
ret = 0;
out2:
out1:
return ret;
}
int usbg_create_gadget(usbg_state *s, const char *name, const struct usbg_gadget_attrs *g_attrs, const struct usbg_gadget_strs *g_strs, usbg_gadget **g)
Create a new USB gadget device and set given attributes and strings.
Definition: usbg.c:1530
const char * usbg_strerror(usbg_error e)
Get the short description of error.
Definition: usbg_error.c:123
int usbg_add_config_function(usbg_config *c, const char *name, usbg_function *f)
Add a function to a configuration.
Definition: usbg.c:2366
int usbg_create_config(usbg_gadget *g, int id, const char *label, const struct usbg_config_attrs *c_attrs, const struct usbg_config_strs *c_strs, usbg_config **c)
Create a new USB gadget configuration.
Definition: usbg.c:2177
int usbg_enable_gadget(usbg_gadget *g, usbg_udc *udc)
Enable a USB gadget device.
Definition: usbg.c:2546
int usbg_init(const char *configfs_path, usbg_state **state)
Initialize the libusbgx library state.
Definition: usbg.c:1089
void usbg_cleanup(usbg_state *s)
Clean up the libusbgx library state.
Definition: usbg.c:1134
int usbg_create_function(usbg_gadget *g, usbg_function_type type, const char *instance, void *f_attrs, usbg_function **f)
Create a new USB gadget function and set its attributes.
Definition: usbg.c:2049
const char * usbg_error_name(usbg_error e)
Get the error name as a constant string.
Definition: usbg_error.c:62
USB configuration strings.
Definition: usbg.h:196
USB gadget device attributes.
Definition: usbg.h:132
USB gadget device strings.
Definition: usbg.h:155
Definition: usbg_internal.h:117
Definition: usbg_internal.h:129
Definition: usbg_internal.h:103
Definition: usbg_internal.h:93