力反馈操纵杆支持 (MS Sidewinder FF2)

Question 1

我可能遇到了真正的问题。内核文档https://docs.kernel.org/input/joydev/joystick.html#microsoft-sidewinder-joysticks列出了这些支持的设备：

微软 SideWinder 3D Pro
Microsoft SideWinder 力反馈专业版
Microsoft SideWinder 力反馈方向盘
微软 SideWinder FreeStyle Pro
Microsoft SideWinder GamePad（最多四个，串联）
微软 SideWinder Precision Pro
微软 SideWinder Precision Pro USB

注意到了什么吗？ Force Feedback 2 操纵杆未列出。因此，我从https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.1.6.tar.xz并检查了文件linux-6.1.6/drivers/input/joystick/sidewinder.c。它包含

static char *sw_name[] = {  "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro",
                "Force Feedback Wheel" };

与上面的列表相符，但再次省略了 Force Feedback 2 操纵杆。似乎是一件被遗忘的文物。

Answer

我可能遇到了真正的问题。内核文档https://docs.kernel.org/input/joydev/joystick.html#microsoft-sidewinder-joysticks列出了这些支持的设备：

微软 SideWinder 3D Pro
Microsoft SideWinder 力反馈专业版
Microsoft SideWinder 力反馈方向盘
微软 SideWinder FreeStyle Pro
Microsoft SideWinder GamePad（最多四个，串联）
微软 SideWinder Precision Pro
微软 SideWinder Precision Pro USB

注意到了什么吗？ Force Feedback 2 操纵杆未列出。因此，我从https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.1.6.tar.xz并检查了文件linux-6.1.6/drivers/input/joystick/sidewinder.c。它包含

static char *sw_name[] = {  "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro",
                "Force Feedback Wheel" };

与上面的列表相符，但再次省略了 Force Feedback 2 操纵杆。似乎是一件被遗忘的文物。

Question 2

我偶然发现了力反馈/操纵杆套件中的另一个命令：evtest

以 root 身份运行此程序会显示一个包含 23 个设备的庞大列表，并且还会显示它们的名称：

# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
...
/dev/input/event23: Microsoft SideWinder Force Feedback 2 Joystick
Select the device event number [0-23]:

根据这个提示，我再次运行 fftest 并得到了以下输出：

# fftest /dev/input/event23
Force feedback test program.
HOLD FIRMLY YOUR WHEEL OR JOYSTICK TO PREVENT DAMAGES

Device /dev/input/event23 opened
Features:
  * Absolute axes: X, Y, RZ, Throttle, Hat 0 X, Hat 0 Y, 
    [63 00 03 00 00 00 00 00 ]
  * Relative axes: 
    [00 00 ]
  * Force feedback effects types: Constant, Periodic, Ramp, Spring, Friction, Damper, Rumble, Inertia, Gain, Autocenter, 
    Force feedback periodic effects: Square, Triangle, Sine, Saw up, Saw down, 
    [00 00 00 00 00 00 00 00 00 00 FF 1F 03 00 00 00 ]
  * Number of simultaneous effects: 40

Setting master gain to 75% ... OK
Uploading effect #0 (Periodic sinusoidal) ... OK (id 0)
Uploading effect #1 (Constant) ... OK (id 1)
Uploading effect #2 (Spring) ... OK (id 2)
Uploading effect #3 (Damper) ... OK (id 3)
Uploading effect #4 (Strong rumble, with heavy motor) ... OK (id 4)
Uploading effect #5 (Weak rumble, with light motor) ... OK (id 5)
Enter effect number, -1 to exit

因此，内核似乎可以检测到 Force Feedback 2 操纵杆，并且已知它支持五种不同的效果。输入一些效果数字，例如4真的会让操纵杆摇晃几秒钟。

还有另外一个不错的命令可以使用：

ffcfstress -d /dev/input/event23

查看https://github.com/flosse/linuxconsole：

Joystick utilities
------------------

The following utilities are provided to calibrate and test joysticks:
* ffcfstress, ffmvforce, fftest - test force-feedback devices
* ffset - set force-feedback device parameters
* jscal - calibrate joystick devices, reconfigure the axes and buttons
* jscal-store, jscal-restore - store and retrieve joystick device
  settings as configured using jscal
* jstest - test joystick devices

Answer