我正在尝试使用Arduino Leonardo进行键盘模拟，因为这是其宣传的功能之一。我一直在玩Leonardo并根据Blink示例写了一个非常简单的草图。
// Pin 13 has an LED connected on most Arduino boards.
int led = 13;
// The setup routine runs once when you press reset:
void setup()
{
// Initialize the digital pin as an output.
pinMode(led, OUTPUT);
}
// The loop routine runs over and over again forever:
void loop()
{
delay(5000); // Wait for five seconds
digitalWrite(led, HIGH); // Turn the LED on (HIGH is the voltage level)
delay(100); // Wait for a secondA
digitalWrite(led, LOW); // Turn the LED off by making the voltage LOW
Keyboard.write('A'); // Write an A using keyboard emulator
}
现在这个例子在我的Windows XP机器上运行得很好。它被识别为通用HID键盘，并且每五秒钟会输入一个“A”。
目标环境正在运行DOS所以据我所知，我需要让这台机器上的BIOS识别出Arduino Leonardo，而不是它在DOS中输入'A'。
我一直在修改莱昂纳多的USB设备描述符，试图让它尽可能地与戴尔L100相匹配。我所做的修改没有帮助，我怀疑这是因为Leonardo是一个复合设备，它在同一个USB端口上公开串行通信，键盘仿真和鼠标仿真。 USB描述符/配置的源代码可以编辑，位于：
以下是来自Leon Device的USB Device Viewer的转储：
[Port3] : USB Composite Device
---===>Device Information<===---
English product name: "Arduino Leonardo"
ConnectionStatus:
Current Config Value: 0x01 -> Device Bus Speed: Full
Device Address: 0x03
Open Pipes: 4
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0010 = 0x10 bytes
bInterval: 0x40
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x02 -> Direction: OUT - EndpointID: 2
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x83 -> Direction: IN - EndpointID: 3
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x84 -> Direction: IN - EndpointID: 4
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x01
===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0110
bDeviceClass: 0x00
*!*ERROR: device class should be Multi-interface Function 0xEF
When IAD descriptor is used
bDeviceSubClass: 0x00
*!*ERROR: device SubClass should be USB Common Sub Class 2
When IAD descriptor is used
bDeviceProtocol: 0x00
*!*ERROR: device Protocol should be USB IAD Protocol 1
When IAD descriptor is used
bMaxPacketSize0: 0x40 = (64) Bytes
idVendor: 0x2341 = Vendor ID not listed with USB.org as of 03-19-2008
idProduct: 0x8036
bcdDevice: 0x0100
iManufacturer: 0x01
English (United States) "Arduino LLC"
iProduct: 0x02
English (United States) "Arduino Leonardo"
iSerialNumber: 0x00
bNumConfigurations: 0x01
===>Configuration Descriptor<===
bLength: 0x09
bDescriptorType: 0x02
wTotalLength: 0x0064 -> Validated
bNumInterfaces: 0x03
bConfigurationValue: 0x01
iConfiguration: 0x00
bmAttributes: 0x80 -> Bus Powered
MaxPower: 0xFA = 500 mA
===>IAD Descriptor<===
bLength: 0x08
bDescriptorType: 0x0B
bFirstInterface: 0x00
bInterfaceCount: 0x02
bFunctionClass: 0x02 -> This is Communications (CDC Control) USB Device Interface Class
bFunctionSubClass: 0x01
bFunctionProtocol: 0x01
iFunction: 0x00
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x00
bAlternateSetting: 0x00
bNumEndpoints: 0x01
bInterfaceClass: 0x02 -> This is Communications (CDC Control) USB Device Interface Class
bInterfaceSubClass: 0x01
bInterfaceProtocol: 0x00
CAUTION: This may be an invalid bInterfaceProtocol
iInterface: 0x00
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x05
bDescriptorType: 0x24
05 24 00 10 01
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x05
bDescriptorType: 0x24
05 24 01 01 01
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x04
bDescriptorType: 0x24
04 24 02 06
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x05
bDescriptorType: 0x24
05 24 06 00 01
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0010 = 0x10 bytes
bInterval: 0x40
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x01
bAlternateSetting: 0x00
bNumEndpoints: 0x02
bInterfaceClass: 0x0A -> This is a CDC Data USB Device Interface Class
bInterfaceSubClass: 0x01
bInterfaceProtocol: 0x00
CAUTION: This may be an invalid bInterfaceProtocol
iInterface: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x02 -> Direction: OUT - EndpointID: 2
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x83 -> Direction: IN - EndpointID: 3
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x02
bAlternateSetting: 0x00
bNumEndpoints: 0x01
bInterfaceClass: 0x03 -> HID Interface Class
bInterfaceSubClass: 0x01
bInterfaceProtocol: 0x00
CAUTION: This may be an invalid bInterfaceProtocol
iInterface: 0x00
===>HID Descriptor<===
bLength: 0x09
bDescriptorType: 0x21
bcdHID: 0x0101
bCountryCode: 0x00
bNumDescriptors: 0x01
bDescriptorType: 0x22
wDescriptorLength: 0x0065
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x84 -> Direction: IN - EndpointID: 4
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x01
我怎么能将这个莱昂纳多的BIOS识别为通用键盘？
答案 0 :(得分：2)
Arduino不支持启动协议。我已经开始使用Teensy（与Arduino兼容），并且效果非常好。
答案 1 :(得分：1)
我可能会弄错，但是如果你想在启动时识别你的devide，它的bInterfaceSubClass应该是0x01（引导设备子类）。
在您指出的源文件中，无处不在的子类设置为0x00。
您可以尝试将D_INTERFACE宏的所有用法中的子类从USBCore.h设置为0x01。
我不是Arduino用户，我只使用V-USB在AVR上玩HID键盘模拟。您可以在文档中的USB.org处尝试查找有关usb描述符的详细信息。但这是一堆阅读的页面。
这是键盘的部分od HID描述符转储，通知接口描述符中的值：
Bus 005 Device 002: ID 046d:c30e Logitech, Inc. UltraX Keyboard (Y-BL49)
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x046d Logitech, Inc.
idProduct 0xc30e UltraX Keyboard (Y-BL49)
bcdDevice 1.80
iManufacturer 1 Logitech
iProduct 2 HID compliant keyboard
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 59
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 62
在Linux下使用“lsusb -v”作为root进行转储。