从/ dev / input获取实时信息 [英] Getting live info from /dev/input

问题描述

我不确定这是否是这个问题的正确地方。我正在尝试从系统上的操纵杆 / dev / input / js0 获取轴位置值。如果我运行 jstest / dev / input / js0 ，它将为我提供所有按钮和轴位置的实时反馈。

I am unsure if this is the correct place for this question. I am attempting to obtain the axis position values from a joystick /dev/input/js0 on my system. If I run jstest /dev/input/js0 it will give me live feedback on all buttons and axis positions.

我正在尝试将此信息输入到我的C程序中以控制伺服器。有这样做的功能吗？我在编程中没有对输入设备进行太多的工作，所以这对我来说是全新的。

I am trying to feed this information into my C program to control servos. Is there a function for doing this? I have not worked much with input devices in programming so this is all new to me.

推荐答案

此页： http://scaryreasoner.wordpress.com/2008/02/22/programming-joysticks-with-linux/ 有一个很好的关于如何阅读的文章/ dev / input / js0

This page: http://scaryreasoner.wordpress.com/2008/02/22/programming-joysticks-with-linux/ has a nice writeup on how to read the info from /dev/input/js0

从文件中读取的事件的格式记录在此处： https://www.kernel.org/doc/Documentation/input/input.txt 。这是一个简单的结构，其中包含时间戳，事件类型和标识符以及值：

The format of the events you read from the file are documented here: https://www.kernel.org/doc/Documentation/input/input.txt . It's a simple struct containing a timestamp, the event type and identifier and the value:

struct input_event {
    struct timeval time;
    unsigned short type;
    unsigned short code;
    unsigned int value;
};

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