使用PyUSB发送HID报告 [英] Send HID report with PyUSB
问题描述
更新
我设法正确发送了数据.对于遇到相同问题的任何人，我都使用以下代码:
I managed to send the data properly. For anyone who ran into the same problem, I used the following code:
data=[0x00, 0x04, 0x04, 0xFF, 0xFF, 0xFF, 0x00, 0x00]
result=dev.ctrl_transfer(0x21, 0x9, wValue=0x200, wIndex=0x00, data_or_wLength=data)
(这是基于此处发布的答案:链接)
(This is based on the answer posted here: link)
但是我不清楚，为什么我必须使用
But I don't understand in detail, why I have to use
bmRequestType=0x21
bRequest=0x9
wValue=0x200
解释是什么?
初始请求:
我正拼命尝试使用PyUSB向HID设备发送简单的报告.
I'm desperately trying to send a simple report to a HID-device using PyUSB.
使用"SimpleHIDwrite"我确认该设备可以正常工作.我要发送此数据:
Using "SimpleHIDwrite" I confirmed that the device works just as expected. I want to send this data:
报告ID:00
数据:[00，04，04，FF，FF，FF，00，00]
data: [00, 04, 04, FF, FF, FF, 00, 00]
我对Python和USB还是很陌生，无法弄清楚如何使用dev.ctrl_transfer或dev.write.
I'm quite new to Python and USB and I can't figure out how to do this using dev.ctrl_transfer or dev.write.
也有一些关于将数据发送到HID设备的文章，但是我不知道如何解决我的问题.我该如何解决?
Also, there are some posts about sending data to HID devices, but I couldn't figure out how to solve my problem. How can I fix it?
以下是更多详细信息:
# Based on https://github.com/walac/pyusb/blob/master/docs/tutorial.rst
import usb.core
import usb.util
# Find our device
# dev = usb.core.find(idVendor=0xfffe, idProduct=0x0001)
dev = usb.core.find(idVendor=0x1781, idProduct=0x8c0)
# Was it found?
if dev is None:
raise ValueError('Device not found')
dev.set_configuration()
cfg = dev[0]
intf = cfg[(0,0)]
ep = intf[0]
# dev.write(ep.bEndpointAddress, [0x00, 0x00,0x04,0x04,0xFF,0xFF,0xFF,0x00, 0x00], 1000)
# dev.ctrl_transfer(bmRequestType, bRequest, wValue=0, wIndex=0, data_or_wLength=None, timeout=None)
print("print ep")
print(ep)
print("print cfg")
print(cfg)
print("print intf")
print(intf)
上面脚本的结果是这样的:
And the result of the script above is this:
print ep
ENDPOINT 0x81: Interrupt IN ==========================
bLength : 0x7 (7 bytes)
bDescriptorType : 0x5 Endpoint
bEndpointAddress : 0x81 IN
bmAttributes : 0x3 Interrupt
wMaxPacketSize : 0x8 (8 bytes)
bInterval : 0xa
print cfg
CONFIGURATION 1: 100 mA ==================================
bLength : 0x9 (9 bytes)
bDescriptorType : 0x2 Configuration
wTotalLength : 0x22 (34 bytes)
bNumInterfaces : 0x1
bConfigurationValue : 0x1
iConfiguration : 0x0
bmAttributes : 0x80 Bus Powered
bMaxPower : 0x32 (100 mA)
INTERFACE 0: Human Interface Device ====================
bLength : 0x9 (9 bytes)
bDescriptorType : 0x4 Interface
bInterfaceNumber : 0x0
bAlternateSetting : 0x0
bNumEndpoints : 0x1
bInterfaceClass : 0x3 Human Interface Device
bInterfaceSubClass : 0x0
bInterfaceProtocol : 0x0
iInterface : 0x0
ENDPOINT 0x81: Interrupt IN ==========================
bLength : 0x7 (7 bytes)
bDescriptorType : 0x5 Endpoint
bEndpointAddress : 0x81 IN
bmAttributes : 0x3 Interrupt
wMaxPacketSize : 0x8 (8 bytes)
bInterval : 0xa
print intf
INTERFACE 0: Human Interface Device ====================
bLength : 0x9 (9 bytes)
bDescriptorType : 0x4 Interface
bInterfaceNumber : 0x0
bAlternateSetting : 0x0
bNumEndpoints : 0x1
bInterfaceClass : 0x3 Human Interface Device
bInterfaceSubClass : 0x0
bInterfaceProtocol : 0x0
iInterface : 0x0
ENDPOINT 0x81: Interrupt IN ==========================
bLength : 0x7 (7 bytes)
bDescriptorType : 0x5 Endpoint
bEndpointAddress : 0x81 IN
bmAttributes : 0x3 Interrupt
wMaxPacketSize : 0x8 (8 bytes)
bInterval : 0xa
Process finished with exit code 0
推荐答案
请勿使用PyUSB(除非您也需要其他协议).管理HID并不困难，但是有一个更简单的解决方案.
Don't use PyUSB (unless you need other protocols too). Managing HID isn't difficult, but there is a much easier solution.
HIDAPI是管理协议的C库，并且有也可以使用Python包装器.
此外，它隐藏了从操作系统夺回控制权的必要性，该操作系统可以识别连接时的HID协议，并安装自己的驱动程序.
Also, it hides the necessity to take control back from the operating system, which recognizes the HID protocol on connection, and install its own driver.
这篇关于使用PyUSB发送HID报告的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
