Difference between revisions of "Matrix - Joystick"

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* We extend all three outputs: X, Y and Z and users can use them easily.
 
* We extend all three outputs: X, Y and Z and users can use them easily.
  
 +
 +
==硬件连接==
 +
模块Matrix-Joystick输出的是模拟信号，需要使用ADC转换模块Matrix-Analog_to_Digital_Converter将模拟信号转换为数字信号。<br>
 +
关于模块Matrix-Analog_to_Digital_Converter的使用方法可参考wiki：[[Matrix_-_Analog_to_Digital_Converter/zh|Matrix-Analog_to_Digital_Converter]]。<br>
 +
 +
===连接NanoPi M1===
 +
参考下图连接模块：<br>
 +
[[File:Matrix_Joystick_nanopi_m1.jpg|frameless|600px|Matrix_Joystick_nanopi_m1]]
 +
 +
连接说明：
 +
{| class="wikitable"
 +
|-
 +
|Matrix-Joystick ||   
 +
|-
 +
|GND    || NanoPi M1 Pin9
 +
|-
 +
|5V    || NanoPi M1 Pin2
 +
|-
 +
|X      || Matrix-Analog_to_Digital_Converter A1
 +
|-
 +
|Y      || Matrix-Analog_to_Digital_Converter A2
 +
|}
 +
 +
===连接NanoPi 2===
 +
参考下图连接模块：<br>
 +
[[File:Matrix-Joystick_nanopi_2.jpg|frameless|600px|Matrix-Joystick_nanopi_2]]
 +
 +
连接说明：
 +
{| class="wikitable"
 +
|-
 +
|Matrix-Joystick ||       
 +
|-
 +
|GND    || NanoPi 2 Pin9
 +
|-
 +
|5V    || NanoPi 2 Pin2
 +
|-
 +
|X      || Matrix-Analog_to_Digital_Converter A1
 +
|-
 +
|Y      || Matrix-Analog_to_Digital_Converter A2
 +
|}
 +
 +
===连接NanoPi M2 / NanoPi 2 Fire===
 +
NanoPi M2和NanoPi 2 Fire的40 Pin引脚定义是一模一样的，所以它们操作Matrix配件的步骤是一样的，这里仅以NanoPi M2为例。<br>
 +
参考下图连接模块：<br>
 +
[[File:Matrix_Joystick_nanopi_m2.jpg|frameless|600px|Matrix_Joystick_nanopi_m2]]
 +
 +
连接说明：
 +
{| class="wikitable"
 +
|-
 +
|Matrix-Joystick ||       
 +
|-
 +
|GND    || NanoPi M2 Pin9
 +
|-
 +
|5V    || NanoPi M2 Pin2
 +
|-
 +
|X      || Matrix-Analog_to_Digital_Converter A1
 +
|-
 +
|Y      || Matrix-Analog_to_Digital_Converter A2
 +
|}
 +
 +
===连接NanoPC-T2===
 +
参考下图连接模块：<br>
 +
[[File:Matrix_Joystick_NanoPC-T2.jpg|frameless|600px|Matrix_Joystick_NanoPC-T2]]
 +
 +
连接说明：
 +
{| class="wikitable"
 +
|-
 +
|Matrix-Joystick ||       
 +
|-
 +
|GND    || NanoPC-T2 USB Host GND
 +
|-
 +
|5V    || NanoPC-T2 USB Host 5V
 +
|-
 +
|X      || Matrix-Analog_to_Digital_Converter A1
 +
|-
 +
|Y      || Matrix-Analog_to_Digital_Converter A2
 +
|}
 +
 +
==编译运行测试程序==
 +
启动开发板并运行Debian系统，进入系统后克隆Matrix代码仓库：
 +
<syntaxhighlight lang="bash">
 +
$ apt-get update && apt-get install git
 +
$ git clone https://github.com/friendlyarm/matrix.git
 +
</syntaxhighlight>
 +
克隆完成后会得到一个名为matrix的目录。
 +
 +
编译并安装Matrix：
 +
<syntaxhighlight lang="bash">
 +
$ cd matrix
 +
$ make && make install
 +
</syntaxhighlight>
 +
 +
运行测试程序：
 +
<syntaxhighlight lang="bash">
 +
$ matrix-joystick
 +
</syntaxhighlight>
 +
注意：此模块并不支持热插拔，启动系统前需要确保硬件连接正确。<br>
 +
运行效果如下：<br>
 +
<syntaxhighlight lang="bash">
 +
x=1280 y=1280
 +
</syntaxhighlight>
 +
拨动摇杆可以检测到x和y轴的变化。
 +
 +
==代码说明==
 +
所有的开发板都共用一套Matrix代码，本模块的测试示例代码为matrix-joystick，内容如下:
 +
<syntaxhighlight lang="c">
 +
int main(int argc, char ** argv)
 +
{
 +
    int i = 0;
 +
    int x, y, board;
 +
   
 +
    x = y = 0;
 +
    if ((board = boardInit()) < 0) {
 +
        printf("Fail to init board\n");
 +
        return -1;
 +
    }
 +
   
 +
    system("modprobe "DRIVER_MODULE);
 +
    signal(SIGINT, intHandler);
 +
    for (i=0; i<PS2_READ_TIMES; i++) {
 +
        if (pcf8591Read(1, &x) != -1 && pcf8591Read(2, &y) != -1) {
 +
            printf("x=%4d y=%4d\n", x, y);
 +
        }
 +
    }
 +
    system("rmmod "DRIVER_MODULE);
 +
    return 0;
 +
}
 +
</syntaxhighlight>
 +
API说明参考维基：[[Matrix API reference manual/zh|Matrix API reference manual]] <br>
 +
<!---
 
==Download Matrix Source Code==
 
==Download Matrix Source Code==
 
All the matrix modules' code samples are open source. They are maintained on GitHub - https://github.com/friendlyarm/matrix.git <br>
 
All the matrix modules' code samples are open source. They are maintained on GitHub - https://github.com/friendlyarm/matrix.git <br>
Line 317: Line 447:
  
 
==Connect to Arduino==
 
==Connect to Arduino==
−
 
+
--->
 
==Resources==
 
==Resources==
  

Revision as of 13:49, 21 June 2016

查看中文

1 Introduction

Joystick
  • The matrix-joystick module is a two-axis stick module. It consists of two Sliding rheostats and one button. It has two analog outputs and one digital output. Its positional states can be measured as X and Y axis values as the calibrated resistance of the two potentiometers.
  • When you move the joystick the sliding rheostats' resistance will change and the corresponding x/y values will change too. When you push the joystick the SW level will turn low.

2 Features

  • X and Y axis, and one button
  • 2.54mm spacing pin
  • PCB dimension(mm): 24 X 32

双轴摇杆PCB

  • Pin Description:
Pin Description
GND Ground
5V Supply Voltage 5V
SW Button
X X Axis
Y Y Axis

3 Basic Device Operation

  • It has two analog outputs and one digital output. The two analog outputs are measured as X and Y values as the calibrated resistance of the two potentiometers. The digital output is measured as Z value indicating whether or not the button is pressed.
  • We extend all three outputs: X, Y and Z and users can use them easily.


4 硬件连接

模块Matrix-Joystick输出的是模拟信号，需要使用ADC转换模块Matrix-Analog_to_Digital_Converter将模拟信号转换为数字信号。
关于模块Matrix-Analog_to_Digital_Converter的使用方法可参考wiki：Matrix-Analog_to_Digital_Converter。

4.1 连接NanoPi M1

参考下图连接模块：
Matrix_Joystick_nanopi_m1

连接说明：

Matrix-Joystick
GND NanoPi M1 Pin9
5V NanoPi M1 Pin2
X Matrix-Analog_to_Digital_Converter A1
Y Matrix-Analog_to_Digital_Converter A2

4.2 连接NanoPi 2

参考下图连接模块：
Matrix-Joystick_nanopi_2

连接说明：

Matrix-Joystick
GND NanoPi 2 Pin9
5V NanoPi 2 Pin2
X Matrix-Analog_to_Digital_Converter A1
Y Matrix-Analog_to_Digital_Converter A2

4.3 连接NanoPi M2 / NanoPi 2 Fire

NanoPi M2和NanoPi 2 Fire的40 Pin引脚定义是一模一样的，所以它们操作Matrix配件的步骤是一样的，这里仅以NanoPi M2为例。
参考下图连接模块：
Matrix_Joystick_nanopi_m2

连接说明：

Matrix-Joystick
GND NanoPi M2 Pin9
5V NanoPi M2 Pin2
X Matrix-Analog_to_Digital_Converter A1
Y Matrix-Analog_to_Digital_Converter A2

4.4 连接NanoPC-T2

参考下图连接模块：
Matrix_Joystick_NanoPC-T2

连接说明：

Matrix-Joystick
GND NanoPC-T2 USB Host GND
5V NanoPC-T2 USB Host 5V
X Matrix-Analog_to_Digital_Converter A1
Y Matrix-Analog_to_Digital_Converter A2

5 编译运行测试程序

启动开发板并运行Debian系统，进入系统后克隆Matrix代码仓库： 

$ apt-get update && apt-get install git
$ git clone https://github.com/friendlyarm/matrix.git

克隆完成后会得到一个名为matrix的目录。

编译并安装Matrix： 

$ cd matrix
$ make && make install

运行测试程序： 

$ matrix-joystick

注意：此模块并不支持热插拔，启动系统前需要确保硬件连接正确。
运行效果如下：

x=1280 y=1280

拨动摇杆可以检测到x和y轴的变化。

6 代码说明

所有的开发板都共用一套Matrix代码，本模块的测试示例代码为matrix-joystick，内容如下: 

int main(int argc, char ** argv)
{
    int i = 0;
    int x, y, board;
 
    x = y = 0;
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    }
 
    system("modprobe "DRIVER_MODULE);
    signal(SIGINT, intHandler);
    for (i=0; i<PS2_READ_TIMES; i++) {
        if (pcf8591Read(1, &x) != -1 && pcf8591Read(2, &y) != -1) {
            printf("x=%4d y=%4d\n", x, y);
        }
    }
    system("rmmod "DRIVER_MODULE);
    return 0;
}

API说明参考维基：Matrix API reference manual

7 Resources

8 Update Log

8.1 Feb-23-2016

  • Added the description for "NanoPi 2 branch" in Section 4
  • Added Section 5: Connect to NanoPi 2


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