windows 下的 Pywinusb 和 Flyfish FF32 设备。 Pywinusb 只发送零？

Question

我正在尝试在 windows 下为 Flyfish FF32 USB-HID IO 板 (http://www.flyfish-tech.com/FF32/index.php) 创建 python 库。我正在使用 pywinusb 库，Python 2.7，windows 7。

设备本身与 flyfish GUI 提供的一起工作。此外，当运行 "show_hids" 来自 pywinusb 设备的演示可见时：

HID device (vID=0x04d8, pID=0xf8b9, v=0x0032); FLYFISH TECHNOLOGIES; FF32, Path: \?\hid#vid_04d8&pid_f8b9#a&135de629&1&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}

  Path:      \?\hid#vid_04d8&pid_f8b9#a&135de629&1&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}

  Instance:  HID\VID_04D8&PID_F8B9\A&135DE629&1&0000

  Port (ID): 2460

  Port (str):USB\VID_04D8&PID_F8B9&815F95E&0&3

HID device documentation report
===============================

Top Level Details
-----------------

Manufacturer String:    FLYFISH TECHNOLOGIES
Product Sting:          FF32
Serial Number:          ?

Vendor ID:              0x04d8
Product ID:             0xf8b9
Version number:         0x0032

Device Path:            \?\hid#vid_04d8&pid_f8b9#a&135de629&1&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}
Device Instance Id:     HID\VID_04D8&PID_F8B9\A&135DE629&1&0000
Parent Instance Id:     2460

Top level usage:        Page=0xff00, Usage=0x01
Usage identification:   Unknown Page/usage
Link collections:       1 collection(s)

Reports
-------

Input Report
~~~~~~~~~~~~
Length:     65 byte(s)
Buttons:    1 button(s)
Values:     0 value(s)

Output Report
~~~~~~~~~~~~~
length:     65 byte(s)
Buttons:    1 button(s)
Values:     0 value(s)

Feature Report
~~~~~~~~~~~~~
Length:     0 byte(s)
Buttons:    0 button(s)
Values:     0 value(s)

*** Input Caps ***

    Usage Range 1~64 (0x1~0x40), Page 0xff00 (Vendor-defined)
        bit_field: 0
        data_index_max: 63
        data_index_min: 0
        designator_max: 0
        designator_min: 0
        is_absolute: 1
        is_alias: 0
        is_button: True
        is_designator_range: 0
        is_range: 1
        is_string_range: 0
        is_value: False
        link_collection: 0
        link_usage: 1 (0x1)
        link_usage_page: 65280 (0xff00)
        report_id: 0
        string_max: 0
        string_min: 0

*** Output Caps ***

    Usage Range 1~64 (0x1~0x40), Page 0xff00 (Vendor-defined)
        bit_field: 0
        data_index_max: 63
        data_index_min: 0
        designator_max: 0
        designator_min: 0
        is_absolute: 1
        is_alias: 0
        is_button: True
        is_designator_range: 0
        is_range: 1
        is_string_range: 0
        is_value: False
        link_collection: 0
        link_usage: 1 (0x1)
        link_usage_page: 65280 (0xff00)
        report_id: 0
        string_max: 0
        string_min: 0

但是当运行以下时，修改demo：

import pywinusb.hid as hid
from time import sleep


def sample_handler(data):
    print("Raw data: {0}".format(data))

filter = hid.HidDeviceFilter(vendor_id = 0x04d8, product_id = 0xf8b9)

hid_device = filter.get_devices()
device = hid_device[0]
device.open()
target_usage = hid.get_full_usage_id(0xff00, 1)
device.set_raw_data_handler(sample_handler)

report = device.find_output_reports()
print(report[0])

buffer = [0x00]*65
buffer[0] = 0
buffer[1] = 0x13


report[0].set_raw_data(buffer)
report[0].send()
sleep(1)

device.close()

执行输出： HID 报告对象（输出报告

t, id=0x00), 63 items included
Raw data: [0, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]

我没有收到预期的供应商信息。我安装了 USB 嗅探软件，结果发现无论我在 缓冲区 中放入什么，FF32 总是得到 0 数组。

供参考。从 GUI 嗅探的包：

80 00 09 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 18 f1 6d 0b 80 fa ff ff
02 00 00 00 40 00 00 00 75 9f b6 0b 80 f8 ff ff
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
*13* 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

还有一个来自我的脚本：

80 00 09 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 18 f1 6d 0b 80 fa ff ff
02 00 00 00 40 00 00 00 41 57 87 05 80 f8 ff ff
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

有人知道这里出了什么问题吗？

Answer 1

这个设备很奇怪，65 个字节的报告不是预期的，因为这通常受到端点大小的限制。

无论如何，set_raw_data() 预计将用作 "all at once" HID 使用设置的模板，因此它将验证您提供了有效的报告 ID 和可解析的信息（解析由 Windows API).

在您的情况下，如果您想将 "anything" 发送到您的设备，只要报告 ID 列在 HID 描述符（第一个字节）中，只需使用：

report.send(buffer) # this validate buffer[0] matches report id

device.send_output_report(buffer) # this will send anything to your device

在这两种情况下，您都绕过了报告解析逻辑，这些是发送数据的最有效方式，对您发送的内容提供较少的验证。

windows 下的 Pywinusb 和 Flyfish FF32 设备。 Pywinusb 只发送零？

Pywinusb and Flyfish FF32 device under windows. Pywinusb sends just zeros?

windows

usb

hid

python-2.7

pywinusb