使用 libusb_interrupt_transfer(...) 写入设备，始终以 LIBUSB_ERROR_IO 结束。Libusb 版本：libusb-1.0.4 STM32F103 代码 - hid 设备的 st 示例
检查：
- 代码中的端点设置为 lsusb 中的：0x81
- 在 usbmon 中，我可以看到对描述符等的请求，但是当我触发 libusb_interrupt_transfer(...) 时，没有通信（没有登录 usbmon）
- STM32板永远不会进入指定的中断端点
- 使用的设备句柄是正确的
追查问题的下一步是什么？
这是 lsusb 输出：
Bus 001 Device 005: ID 0483:5750 STMicroelectronics
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0483 STMicroelectronics
idProduct 0x5750
bcdDevice 2.00
iManufacturer 1 STMicroelectronics
iProduct 2 STM32 Custm HID
iSerial 3 8D8316685052
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 41
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 163
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 32
Device Status: 0x0001
Self Powered