API说明：
int libusb_get_device_descriptor(libusb_device *dev, struct libusb_device_descriptor *desc);
获取设备的设备描述符。
从版本 1.0.16、LIBUSB_API_VERSION>=0x01000102 开始此函数始终成功。
设备描述符、配置描述符、接口描述符、端点描述符：
// 设备描述符
struct libusb_device_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于18。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x01。
uint16_t bcdUSB; // USB规范版本号。
uint8_t bDeviceClass; // USB标准化组织的类代码。
uint8_t bDeviceSubClass; // USB标准化组织指定的子类代码，由 bDeviceClass 值限定。
uint8_t bDeviceProtocol; // USB标准化组织指定的协议代码，由 bDeviceClass 和 bDeviceSubClass 值限定。
uint8_t bMaxPacketSize0; // 端点0的最大数据包大小。
uint16_t idVendor; // USB标准化组织指定的供应商ID。
uint16_t idProduct; // USB标准化组织指定的产品ID。
uint16_t bcdDevice; // 设备版本号。
uint8_t iManufacturer; // 描述制造商的字符串描述符的索引。
uint8_t iProduct; // 描述产品的字符串描述符的索引。
uint8_t iSerialNumber; // 包含设备序列号的字符串描述符的索引。
uint8_t bNumConfigurations; // 可能的配置数量。
};
// 配置描述符：
struct libusb_config_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于9。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x02。
uint16_t wTotalLength; // 本配置总大小。
uint8_t bNumInterfaces; // 支持的接口数。
uint8_t bConfigurationValue; // 标识符值。
uint8_t iConfiguration; // 描述此配置的字符串描述符的索引。
uint8_t bmAttributes; // 配置特征。
uint8_t MaxPower; // 最大电流。高速模式单位是2毫安，超高速模式单位是8毫安。
const struct libusb_interface *interface; // 支持的接口数组，数组的长度由 bNumInterfaces 字段确定。
const unsigned char *extra; // 其他描述符。libusb将不认识的描述符储存在这里。
int extra_length; // 其他描述符总长度。
};
// 接口:
struct libusb_interface {
const struct libusb_interface_descriptor *altsetting;
int num_altsetting;
};
// 接口描述符：
struct libusb_interface_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于9。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x04。
uint8_t bInterfaceNumber; // 此接口的编号。
uint8_t bAlternateSetting; // 此接口备用设置值。
uint8_t bNumEndpoints; // 此接口使用的端点数(不包括控制端点)。
uint8_t bInterfaceClass; // 此接口的类代码
uint8_t bInterfaceSubClass; // 此接口的子类代码，由 bInterfaceClass 值限定。
uint8_t bInterfaceProtocol; // 此接口的协议代码，由 bInterfaceClass 和 bInterfaceSubClass 值限定。
uint8_t iInterface; // 描述此接口的字符串描述符的索引。
const struct libusb_endpoint_descriptor *endpoint; // 端点描述符数组，长度由 bNumEndpoints 字段确定。
const unsigned char *extra; // 其他描述符。libusb将不认识的描述符储存在这里。
int extra_length; // 其他描述符总长度。
};
// 端点描述符：
struct libusb_endpoint_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于7。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x05。
uint8_t bEndpointAddress; // 端点地址。
uint8_t bmAttributes; // 使用 bConfigurationValue 配置端点时应用于该端点的属性。
uint16_t wMaxPacketSize; // 此端点能够发送/接收的最大数据包大小。
uint8_t bInterval; // 数据传输的间隔。
uint8_t bRefresh; // 仅适用于音频设备：提供同步反馈的速率。
uint8_t bSynchAddress; // 仅适用于音频设备：同步端点的地址。
const unsigned char *extra; // 其他描述符。libusb将不认识的描述符储存在这里。
int extra_length; // 其他描述符总长度。
};
int libusb_get_active_config_descriptor(libusb_device *dev, struct libusb_config_descriptor **config);
获取设备的当前正在使用的配置描述符。
通过 **config 返回配置描述符，通过 libusb_free_config_descriptor() 释放配置描述符。
如果设备处于未配置状态，返回 LIBUSB_ERROR_NOT_FOUND 。
int libusb_get_config_descriptor(libusb_device *dev, uint8_t config_index, struct libusb_config_descriptor **config);
根据索引获取设备的配置描述符。
通过 **config 返回配置描述符，通过 libusb_free_config_descriptor() 释放配置描述符。
如果配置不存在，返回 LIBUSB_ERROR_NOT_FOUND 。
int libusb_get_config_descriptor_by_value(libusb_device *dev, uint8_t bConfigurationValue, struct libusb_config_descriptor **config);
获取具有特定 bConfigurationValue 的配置描述符。
通过 **config 返回配置描述符，通过 libusb_free_config_descriptor() 释放配置描述符。
如果配置不存在，返回 LIBUSB_ERROR_NOT_FOUND 。
void libusb_free_config_descriptor(struct libusb_config_descriptor *config);
释放这三个函数获取的配置描述符：
libusb_get_config_descriptor()
libusb_get_active_config_descriptor()
libusb_get_config_descriptor_by_value()
int libusb_open(libusb_device *dev, libusb_device_handle **dev_handle);
打开一个设备用于 I/O 操作，通过 **dev_handle 返回设备打开后的句柄。
该函数会增加 *dev 所指的USB设备的引用计数。
返回值：
LIBUSB_SUCCESS 成功
LIBUSB_ERROR_NO_MEM 分配内存失败
LIBUSB_ERROR_ACCESS 权限不足
LIBUSB_ERROR_NO_DEVICE 没有这个设备
libusb_device_handle* libusb_open_device_with_vid_pid(libusb_context *ctx, uint16_t vendor_id, uint16_t product_id);
通过 VID+PID 打开一个设备用于 I/O 操作，返回设备打开后的句柄。
该函数只打开第一个找到的设备，没找到或发生其他错误返回NULL。
void libusb_close(libusb_device_handle *dev_handle);
关闭一个设备句柄。该函数会减少句柄所关联的设备的引用计数。
libusb_device* libusb_get_device(libusb_device_handle *dev_handle);
通过设备句柄返回设备实例。
该函数不会修改返回的设备的引用计数。
代码举例：
/*
int libusb_get_device_descriptor(libusb_device *dev, struct libusb_device_descriptor *desc);
获取设备的设备描述符。
从版本 1.0.16、LIBUSB_API_VERSION>=0x01000102 开始此函数始终成功。
设备描述符：
struct libusb_device_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于18。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x01。
uint16_t bcdUSB; // USB规范版本号。
uint8_t bDeviceClass; // USB标准化组织的类代码。
uint8_t bDeviceSubClass; // USB标准化组织指定的子类代码，由 bDeviceClass 值限定。
uint8_t bDeviceProtocol; // USB标准化组织指定的协议代码，由 bDeviceClass 和 bDeviceSubClass 值限定。
uint8_t bMaxPacketSize0; // 端点0的最大数据包大小。
uint16_t idVendor; // USB标准化组织指定的供应商ID。
uint16_t idProduct; // USB标准化组织指定的产品ID。
uint16_t bcdDevice; // 设备版本号。
uint8_t iManufacturer; // 描述制造商的字符串描述符的索引。
uint8_t iProduct; // 描述产品的字符串描述符的索引。
uint8_t iSerialNumber; // 包含设备序列号的字符串描述符的索引。
uint8_t bNumConfigurations; // 可能的配置数量。
};
int libusb_get_active_config_descriptor(libusb_device *dev, struct libusb_config_descriptor **config);
获取设备的当前正在使用的配置描述符。
通过 **config 返回配置描述符，通过 libusb_free_config_descriptor() 释放配置描述符。
如果设备处于未配置状态，返回 LIBUSB_ERROR_NOT_FOUND 。
int libusb_get_config_descriptor(libusb_device *dev, uint8_t config_index, struct libusb_config_descriptor **config);
根据索引获取设备的配置描述符。
通过 **config 返回配置描述符，通过 libusb_free_config_descriptor() 释放配置描述符。
如果配置不存在，返回 LIBUSB_ERROR_NOT_FOUND 。
int libusb_get_config_descriptor_by_value(libusb_device *dev, uint8_t bConfigurationValue, struct libusb_config_descriptor **config);
获取具有特定 bConfigurationValue 的配置描述符。
通过 **config 返回配置描述符，通过 libusb_free_config_descriptor() 释放配置描述符。
如果配置不存在，返回 LIBUSB_ERROR_NOT_FOUND 。
void libusb_free_config_descriptor(struct libusb_config_descriptor *config);
释放这三个函数获取的配置描述符：
libusb_get_config_descriptor()
libusb_get_active_config_descriptor()
libusb_get_config_descriptor_by_value()
配置描述符：
struct libusb_config_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于9。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x02。
uint16_t wTotalLength; // 本配置总大小。
uint8_t bNumInterfaces; // 支持的接口数。
uint8_t bConfigurationValue; // 标识符值。
uint8_t iConfiguration; // 描述此配置的字符串描述符的索引。
uint8_t bmAttributes; // 配置特征。
uint8_t MaxPower; // 最大电流。高速模式单位是2毫安，超高速模式单位是8毫安。
const struct libusb_interface *interface; // 支持的接口数组，数组的长度由 bNumInterfaces 字段确定。
const unsigned char *extra; // 其他描述符。libusb将不认识的描述符储存在这里。
int extra_length; // 其他描述符总长度。
};
接口:
struct libusb_interface {
const struct libusb_interface_descriptor *altsetting;
int num_altsetting;
};
接口描述符
struct libusb_interface_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于9。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x04。
uint8_t bInterfaceNumber; // 此接口的编号。
uint8_t bAlternateSetting; // 此接口备用设置值。
uint8_t bNumEndpoints; // 此接口使用的端点数(不包括控制端点)。
uint8_t bInterfaceClass; // 此接口的类代码
uint8_t bInterfaceSubClass; // 此接口的子类代码，由 bInterfaceClass 值限定。
uint8_t bInterfaceProtocol; // 此接口的协议代码，由 bInterfaceClass 和 bInterfaceSubClass 值限定。
uint8_t iInterface; // 描述此接口的字符串描述符的索引。
const struct libusb_endpoint_descriptor *endpoint; // 端点描述符数组，长度由 bNumEndpoints 字段确定。
const unsigned char *extra; // 其他描述符。libusb将不认识的描述符储存在这里。
int extra_length; // 其他描述符总长度。
};
端点描述符：
struct libusb_endpoint_descriptor {
uint8_t bLength; // 本描述符的字节数，恒等于7。
uint8_t bDescriptorType; // 本描述符类型，恒等于0x05。
uint8_t bEndpointAddress; // 端点地址。
uint8_t bmAttributes; // 使用 bConfigurationValue 配置端点时应用于该端点的属性。
uint16_t wMaxPacketSize; // 此端点能够发送/接收的最大数据包大小。
uint8_t bInterval; // 数据传输的间隔。
uint8_t bRefresh; // 仅适用于音频设备：提供同步反馈的速率。
uint8_t bSynchAddress; // 仅适用于音频设备：同步端点的地址。
const unsigned char *extra; // 其他描述符。libusb将不认识的描述符储存在这里。
int extra_length; // 其他描述符总长度。
};
int libusb_open(libusb_device *dev, libusb_device_handle **dev_handle);
打开一个设备用于 I/O 操作，通过 **dev_handle 返回设备打开后的句柄。
该函数会增加 *dev 所指的USB设备的引用计数。
返回值：
LIBUSB_SUCCESS 成功
LIBUSB_ERROR_NO_MEM 分配内存失败
LIBUSB_ERROR_ACCESS 权限不足
LIBUSB_ERROR_NO_DEVICE 没有这个设备
libusb_device_handle* libusb_open_device_with_vid_pid(libusb_context *ctx, uint16_t vendor_id, uint16_t product_id);
通过 VID+PID 打开一个设备用于 I/O 操作，返回设备打开后的句柄。
该函数只打开第一个找到的设备，没找到或发生其他错误返回NULL。
void libusb_close(libusb_device_handle *dev_handle);
关闭一个设备句柄。该函数会减少句柄所关联的设备的引用计数。
libusb_device* libusb_get_device(libusb_device_handle *dev_handle);
通过设备句柄返回设备实例。
该函数不会修改返回的设备的引用计数。
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libusb.h"
static char* getPortsString(libusb_device *dev){
static char partsString[64] = {'r','o','o','t',0};
uint8_t ports[16];
int count = libusb_get_port_numbers(dev, ports, 16);
if(count > 0){
int i, offset = 4;
for(i=0; i<count; i++){
offset += sprintf(partsString+offset, "->%03u", ports[i]);
}
}
return partsString;
}
#define MAXPOWER(speed, power) (((speed)>LIBUSB_SPEED_HIGH?8:2)*(power))
static void dumpdevice(libusb_context *libusbCtx, libusb_device *dev){
static char* speedString[] = {
"未知速度",
"低速(1500KBit/s)",
"全速(12000KBit/s)",
"高速(480000KBit/s)",
"超高速(5000000KBit/s)",
"超超速(10000000KBit/s)"
};
uint8_t bus = libusb_get_bus_number(dev);
uint8_t addr = libusb_get_device_address(dev);
int speed = libusb_get_device_speed(dev);
char *path = getPortsString(dev);
printf("/dev/bus/usb/%03u/%03u %s %s\n", bus, addr, path, speedString[speed]);
// 获取设备描述符
struct libusb_device_descriptor deviceDescriptor;
memset(&deviceDescriptor, 0, sizeof(struct libusb_device_descriptor));
libusb_get_device_descriptor(dev, &deviceDescriptor);
printf(" deviceDescriptor.bLength = %u\n", deviceDescriptor.bLength);
printf(" deviceDescriptor.bDescriptorType = %02X\n", deviceDescriptor.bDescriptorType);
printf(" deviceDescriptor.bcdUSB = %04X\n", deviceDescriptor.bcdUSB);
printf(" deviceDescriptor.bDeviceClass = %02X\n", deviceDescriptor.bDeviceClass);
printf(" deviceDescriptor.bDeviceSubClass = %02X\n", deviceDescriptor.bDeviceSubClass);
printf(" deviceDescriptor.bDeviceProtocol = %02X\n", deviceDescriptor.bDeviceProtocol);
printf(" deviceDescriptor.bMaxPacketSize0 = %u\n", deviceDescriptor.bMaxPacketSize0);
printf(" deviceDescriptor.idVendor = %04X\n", deviceDescriptor.idVendor);
printf(" deviceDescriptor.idProduct = %04X\n", deviceDescriptor.idProduct);
printf(" deviceDescriptor.bcdDevice = %04X\n", deviceDescriptor.bcdDevice);
printf(" deviceDescriptor.bNumConfigurations = %u\n", deviceDescriptor.bNumConfigurations);
// 获取活跃的配置描述符的 bConfigurationValue
uint8_t active_bConfigurationValue = 0;
struct libusb_config_descriptor *configDescriptor = NULL;
libusb_get_active_config_descriptor(dev, &configDescriptor);
if(configDescriptor){
active_bConfigurationValue = configDescriptor->bConfigurationValue;
libusb_free_config_descriptor(configDescriptor);
configDescriptor = NULL;
}
// 获取所有配置描述符
uint8_t configIndex;
for(configIndex=0; configIndex<deviceDescriptor.bNumConfigurations; configIndex++){
configDescriptor = NULL;
libusb_get_config_descriptor(dev, configIndex, &configDescriptor);
if(configDescriptor){
// 活跃的配置每个字段前面加一个*号
if(configDescriptor->bConfigurationValue == active_bConfigurationValue){
printf(" >*configDescriptor->bLength = %u\n", configDescriptor->bLength);
printf(" *configDescriptor->bDescriptorType = %02X\n", configDescriptor->bDescriptorType);
printf(" *configDescriptor->wTotalLength = %u\n", configDescriptor->wTotalLength);
printf(" *configDescriptor->bNumInterfaces = %u\n", configDescriptor->bNumInterfaces);
printf(" *configDescriptor->bConfigurationValue = %02X\n", configDescriptor->bConfigurationValue);
printf(" *configDescriptor->iConfiguration = %u\n", configDescriptor->iConfiguration);
printf(" *configDescriptor->bmAttributes = %02X\n", configDescriptor->bmAttributes);
printf(" *configDescriptor->MaxPower = %u(%umA)\n", configDescriptor->MaxPower, MAXPOWER(speed,configDescriptor->MaxPower));
}else{
printf(" > configDescriptor->bLength = %u\n", configDescriptor->bLength);
printf(" configDescriptor->bDescriptorType = %02X\n", configDescriptor->bDescriptorType);
printf(" configDescriptor->wTotalLength = %u\n", configDescriptor->wTotalLength);
printf(" configDescriptor->bNumInterfaces = %u\n", configDescriptor->bNumInterfaces);
printf(" configDescriptor->bConfigurationValue = %02X\n", configDescriptor->bConfigurationValue);
printf(" configDescriptor->iConfiguration = %u\n", configDescriptor->iConfiguration);
printf(" configDescriptor->bmAttributes = %02X\n", configDescriptor->bmAttributes);
printf(" configDescriptor->MaxPower = %u(%umA)\n", configDescriptor->MaxPower, MAXPOWER(speed,configDescriptor->MaxPower));
}
// 打印所有接口描述符
int numAltsetting;
int altsettingIndex;
uint8_t endpointIndex;
uint8_t interfaceIndex;
struct libusb_endpoint_descriptor *endpointDescriptor;
struct libusb_interface_descriptor *interfaceDescriptor;
for(interfaceIndex=0; interfaceIndex<configDescriptor->bNumInterfaces; interfaceIndex++){
numAltsetting = configDescriptor->interface[interfaceIndex].num_altsetting;
printf(" > interface[%u]:numberOfAltsetting = %d\n", interfaceIndex, numAltsetting);
for(altsettingIndex=0; altsettingIndex<numAltsetting; altsettingIndex++){
interfaceDescriptor = (void*)&(configDescriptor->interface[interfaceIndex].altsetting[altsettingIndex]);
printf(" > interfaceDescriptor->bLength = %u\n", interfaceDescriptor->bLength);
printf(" interfaceDescriptor->bDescriptorType = %02X\n", interfaceDescriptor->bDescriptorType);
printf(" interfaceDescriptor->bInterfaceNumber = %u\n", interfaceDescriptor->bInterfaceNumber);
printf(" interfaceDescriptor->bAlternateSetting = %u\n", interfaceDescriptor->bAlternateSetting);
printf(" interfaceDescriptor->bNumEndpoints = %u\n", interfaceDescriptor->bNumEndpoints);
printf(" interfaceDescriptor->bInterfaceClass = %02X\n", interfaceDescriptor->bInterfaceClass);
printf(" interfaceDescriptor->bInterfaceSubClass = %02X\n", interfaceDescriptor->bInterfaceSubClass);
printf(" interfaceDescriptor->bInterfaceProtocol = %02X\n", interfaceDescriptor->bInterfaceProtocol);
printf(" interfaceDescriptor->iInterface = %u\n", interfaceDescriptor->iInterface);
// 打印所有端点描述符
if((interfaceDescriptor->bNumEndpoints) && (interfaceDescriptor->endpoint)){
for(endpointIndex=0; endpointIndex<interfaceDescriptor->bNumEndpoints; endpointIndex++){
endpointDescriptor = (void*)&(interfaceDescriptor->endpoint[endpointIndex]);
printf(" > endpointDescriptor->bLength = %u\n", endpointDescriptor->bLength);
printf(" endpointDescriptor->bDescriptorType = %02X\n", endpointDescriptor->bDescriptorType);
printf(" endpointDescriptor->bEndpointAddress = %02X\n", endpointDescriptor->bEndpointAddress);
printf(" endpointDescriptor->bmAttributes = %02X\n", endpointDescriptor->bmAttributes);
printf(" endpointDescriptor->wMaxPacketSize = %u\n", endpointDescriptor->wMaxPacketSize);
printf(" endpointDescriptor->bInterval = %u\n", endpointDescriptor->bInterval);
}
}
}
}
libusb_free_config_descriptor(configDescriptor);
configDescriptor = NULL;
}
}
libusb_device_handle *devHandle = NULL;
libusb_open(dev, &devHandle);
if(devHandle){
libusb_close(devHandle);
}
putchar('\n');
}
int main(int argc, char* argv[]){
libusb_context *libusbCtx = NULL;
int errCode = libusb_init(&libusbCtx);
if(errCode) return -1;
// 枚举所有USB设备
libusb_device **devList = NULL;
ssize_t count = libusb_get_device_list(libusbCtx, &devList);
if(count > 0){
ssize_t i;
for(i=0; i<count; i++){
dumpdevice(libusbCtx, devList[i]);
}
libusb_free_device_list(devList, 1);
devList = NULL;
}
libusb_exit(libusbCtx);
return 0;
}
INCLUDE=-I/usr/include/libusb-1.0/
LIBDIR=-L/usr/lib/x86_64-linux-gnu/ -lusb-1.0
all:
gcc -o test1.exe test1.c $(INCLUDE) $(LIBDIR) -Wall
gcc -o test2.exe test2.c $(INCLUDE) $(LIBDIR) -Wall
gcc -o test3.exe test3.c $(INCLUDE) $(LIBDIR) -Wall
运行结果：
test@test-PC:~/TMP/libusb$ ./test3.exe
/dev/bus/usb/002/001 root 超超速(10000000KBit/s)
deviceDescriptor.bLength = 18
deviceDescriptor.bDescriptorType = 01
deviceDescriptor.bcdUSB = 0310
deviceDescriptor.bDeviceClass = 09
deviceDescriptor.bDeviceSubClass = 00
deviceDescriptor.bDeviceProtocol = 03
deviceDescriptor.bMaxPacketSize0 = 9
deviceDescriptor.idVendor = 1D6B
deviceDescriptor.idProduct = 0003
deviceDescriptor.bcdDevice = 0419
deviceDescriptor.bNumConfigurations = 1
>*configDescriptor->bLength = 9
*configDescriptor->bDescriptorType = 02
*configDescriptor->wTotalLength = 31
*configDescriptor->bNumInterfaces = 1
*configDescriptor->bConfigurationValue = 01
*configDescriptor->iConfiguration = 0
*configDescriptor->bmAttributes = E0
*configDescriptor->MaxPower = 0(0mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 09
interfaceDescriptor->bInterfaceSubClass = 00
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 4
endpointDescriptor->bInterval = 12
/dev/bus/usb/001/003 root->009 低速(1500KBit/s)
deviceDescriptor.bLength = 18
deviceDescriptor.bDescriptorType = 01
deviceDescriptor.bcdUSB = 0110
deviceDescriptor.bDeviceClass = 00
deviceDescriptor.bDeviceSubClass = 00
deviceDescriptor.bDeviceProtocol = 00
deviceDescriptor.bMaxPacketSize0 = 8
deviceDescriptor.idVendor = 1C4F
deviceDescriptor.idProduct = 0002
deviceDescriptor.bcdDevice = 0110
deviceDescriptor.bNumConfigurations = 1
>*configDescriptor->bLength = 9
*configDescriptor->bDescriptorType = 02
*configDescriptor->wTotalLength = 59
*configDescriptor->bNumInterfaces = 2
*configDescriptor->bConfigurationValue = 01
*configDescriptor->iConfiguration = 0
*configDescriptor->bmAttributes = A0
*configDescriptor->MaxPower = 49(98mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 03
interfaceDescriptor->bInterfaceSubClass = 01
interfaceDescriptor->bInterfaceProtocol = 01
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 8
endpointDescriptor->bInterval = 10
> interface[1]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 1
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 03
interfaceDescriptor->bInterfaceSubClass = 00
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 82
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 3
endpointDescriptor->bInterval = 10
/dev/bus/usb/001/022 root->002->002 高速(480000KBit/s)
deviceDescriptor.bLength = 18
deviceDescriptor.bDescriptorType = 01
deviceDescriptor.bcdUSB = 0200
deviceDescriptor.bDeviceClass = 00
deviceDescriptor.bDeviceSubClass = 00
deviceDescriptor.bDeviceProtocol = 00
deviceDescriptor.bMaxPacketSize0 = 64
deviceDescriptor.idVendor = 05AC
deviceDescriptor.idProduct = 12A8
deviceDescriptor.bcdDevice = 1208
deviceDescriptor.bNumConfigurations = 4
> configDescriptor->bLength = 9
configDescriptor->bDescriptorType = 02
configDescriptor->wTotalLength = 39
configDescriptor->bNumInterfaces = 1
configDescriptor->bConfigurationValue = 01
configDescriptor->iConfiguration = 5
configDescriptor->bmAttributes = C0
configDescriptor->MaxPower = 250(500mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 3
interfaceDescriptor->bInterfaceClass = 06
interfaceDescriptor->bInterfaceSubClass = 01
interfaceDescriptor->bInterfaceProtocol = 01
interfaceDescriptor->iInterface = 16
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 02
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 83
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 64
endpointDescriptor->bInterval = 10
> configDescriptor->bLength = 9
configDescriptor->bDescriptorType = 02
configDescriptor->wTotalLength = 149
configDescriptor->bNumInterfaces = 3
configDescriptor->bConfigurationValue = 02
configDescriptor->iConfiguration = 6
configDescriptor->bmAttributes = C0
configDescriptor->MaxPower = 250(500mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 0
interfaceDescriptor->bInterfaceClass = 01
interfaceDescriptor->bInterfaceSubClass = 01
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> interface[1]:numberOfAltsetting = 2
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 1
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 0
interfaceDescriptor->bInterfaceClass = 01
interfaceDescriptor->bInterfaceSubClass = 02
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 1
interfaceDescriptor->bAlternateSetting = 1
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 01
interfaceDescriptor->bInterfaceSubClass = 02
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 9
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 01
endpointDescriptor->wMaxPacketSize = 192
endpointDescriptor->bInterval = 4
> interface[2]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 2
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 03
interfaceDescriptor->bInterfaceSubClass = 00
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 83
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 64
endpointDescriptor->bInterval = 1
> configDescriptor->bLength = 9
configDescriptor->bDescriptorType = 02
configDescriptor->wTotalLength = 62
configDescriptor->bNumInterfaces = 2
configDescriptor->bConfigurationValue = 03
configDescriptor->iConfiguration = 7
configDescriptor->bmAttributes = C0
configDescriptor->MaxPower = 250(500mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 3
interfaceDescriptor->bInterfaceClass = 06
interfaceDescriptor->bInterfaceSubClass = 01
interfaceDescriptor->bInterfaceProtocol = 01
interfaceDescriptor->iInterface = 16
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 02
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 83
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 64
endpointDescriptor->bInterval = 10
> interface[1]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 1
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 2
interfaceDescriptor->bInterfaceClass = FF
interfaceDescriptor->bInterfaceSubClass = FE
interfaceDescriptor->bInterfaceProtocol = 02
interfaceDescriptor->iInterface = 13
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 04
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 85
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
>*configDescriptor->bLength = 9
*configDescriptor->bDescriptorType = 02
*configDescriptor->wTotalLength = 117
*configDescriptor->bNumInterfaces = 3
*configDescriptor->bConfigurationValue = 04
*configDescriptor->iConfiguration = 8
*configDescriptor->bmAttributes = C0
*configDescriptor->MaxPower = 250(500mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 3
interfaceDescriptor->bInterfaceClass = 06
interfaceDescriptor->bInterfaceSubClass = 01
interfaceDescriptor->bInterfaceProtocol = 01
interfaceDescriptor->iInterface = 16
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 02
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 83
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 64
endpointDescriptor->bInterval = 10
> interface[1]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 1
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 2
interfaceDescriptor->bInterfaceClass = FF
interfaceDescriptor->bInterfaceSubClass = FE
interfaceDescriptor->bInterfaceProtocol = 02
interfaceDescriptor->iInterface = 13
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 04
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 85
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> interface[2]:numberOfAltsetting = 3
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 2
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 0
interfaceDescriptor->bInterfaceClass = FF
interfaceDescriptor->bInterfaceSubClass = FD
interfaceDescriptor->bInterfaceProtocol = 01
interfaceDescriptor->iInterface = 0
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 2
interfaceDescriptor->bAlternateSetting = 1
interfaceDescriptor->bNumEndpoints = 2
interfaceDescriptor->bInterfaceClass = FF
interfaceDescriptor->bInterfaceSubClass = FD
interfaceDescriptor->bInterfaceProtocol = 01
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 86
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 05
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 2
interfaceDescriptor->bAlternateSetting = 2
interfaceDescriptor->bNumEndpoints = 2
interfaceDescriptor->bInterfaceClass = FF
interfaceDescriptor->bInterfaceSubClass = FD
interfaceDescriptor->bInterfaceProtocol = 01
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 86
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 05
endpointDescriptor->bmAttributes = 02
endpointDescriptor->wMaxPacketSize = 512
endpointDescriptor->bInterval = 0
/dev/bus/usb/001/021 root->002 高速(480000KBit/s)
deviceDescriptor.bLength = 18
deviceDescriptor.bDescriptorType = 01
deviceDescriptor.bcdUSB = 0210
deviceDescriptor.bDeviceClass = 09
deviceDescriptor.bDeviceSubClass = 00
deviceDescriptor.bDeviceProtocol = 01
deviceDescriptor.bMaxPacketSize0 = 64
deviceDescriptor.idVendor = 05E3
deviceDescriptor.idProduct = 0610
deviceDescriptor.bcdDevice = 0654
deviceDescriptor.bNumConfigurations = 1
>*configDescriptor->bLength = 9
*configDescriptor->bDescriptorType = 02
*configDescriptor->wTotalLength = 25
*configDescriptor->bNumInterfaces = 1
*configDescriptor->bConfigurationValue = 01
*configDescriptor->iConfiguration = 0
*configDescriptor->bmAttributes = E0
*configDescriptor->MaxPower = 50(100mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 09
interfaceDescriptor->bInterfaceSubClass = 00
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 1
endpointDescriptor->bInterval = 12
/dev/bus/usb/001/004 root->014 低速(1500KBit/s)
deviceDescriptor.bLength = 18
deviceDescriptor.bDescriptorType = 01
deviceDescriptor.bcdUSB = 0200
deviceDescriptor.bDeviceClass = 00
deviceDescriptor.bDeviceSubClass = 00
deviceDescriptor.bDeviceProtocol = 00
deviceDescriptor.bMaxPacketSize0 = 8
deviceDescriptor.idVendor = 093A
deviceDescriptor.idProduct = 2510
deviceDescriptor.bcdDevice = 0100
deviceDescriptor.bNumConfigurations = 1
>*configDescriptor->bLength = 9
*configDescriptor->bDescriptorType = 02
*configDescriptor->wTotalLength = 34
*configDescriptor->bNumInterfaces = 1
*configDescriptor->bConfigurationValue = 01
*configDescriptor->iConfiguration = 0
*configDescriptor->bmAttributes = A0
*configDescriptor->MaxPower = 50(100mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 03
interfaceDescriptor->bInterfaceSubClass = 01
interfaceDescriptor->bInterfaceProtocol = 02
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 4
endpointDescriptor->bInterval = 10
/dev/bus/usb/001/001 root->014 高速(480000KBit/s)
deviceDescriptor.bLength = 18
deviceDescriptor.bDescriptorType = 01
deviceDescriptor.bcdUSB = 0200
deviceDescriptor.bDeviceClass = 09
deviceDescriptor.bDeviceSubClass = 00
deviceDescriptor.bDeviceProtocol = 01
deviceDescriptor.bMaxPacketSize0 = 64
deviceDescriptor.idVendor = 1D6B
deviceDescriptor.idProduct = 0002
deviceDescriptor.bcdDevice = 0419
deviceDescriptor.bNumConfigurations = 1
>*configDescriptor->bLength = 9
*configDescriptor->bDescriptorType = 02
*configDescriptor->wTotalLength = 25
*configDescriptor->bNumInterfaces = 1
*configDescriptor->bConfigurationValue = 01
*configDescriptor->iConfiguration = 0
*configDescriptor->bmAttributes = E0
*configDescriptor->MaxPower = 0(0mA)
> interface[0]:numberOfAltsetting = 1
> interfaceDescriptor->bLength = 9
interfaceDescriptor->bDescriptorType = 04
interfaceDescriptor->bInterfaceNumber = 0
interfaceDescriptor->bAlternateSetting = 0
interfaceDescriptor->bNumEndpoints = 1
interfaceDescriptor->bInterfaceClass = 09
interfaceDescriptor->bInterfaceSubClass = 00
interfaceDescriptor->bInterfaceProtocol = 00
interfaceDescriptor->iInterface = 0
> endpointDescriptor->bLength = 7
endpointDescriptor->bDescriptorType = 05
endpointDescriptor->bEndpointAddress = 81
endpointDescriptor->bmAttributes = 03
endpointDescriptor->wMaxPacketSize = 4
endpointDescriptor->bInterval = 12
test@test-PC:~/TMP/libusb$
