Difference between revisions of "Matrix - Rotary Encoder"

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==编译运行测试程序==
+
==Compile & Run Test Program==
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启动开发板并运行Debian系统，进入系统后克隆Matrix代码仓库：
+
Boot your ARM board with Debian and copy the matrix code:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
$ apt-get update && apt-get install git
 
$ apt-get update && apt-get install git
 
$ git clone https://github.com/friendlyarm/matrix.git
 
$ git clone https://github.com/friendlyarm/matrix.git
 
</syntaxhighlight>
 
</syntaxhighlight>
−
克隆完成后会得到一个名为matrix的目录。
+
If your cloning is done successfully a "matrix" directory will be generated.
  
−
编译并安装Matrix：
+
Compile and install Matrix:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
$ cd matrix
 
$ cd matrix
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</syntaxhighlight>
 
</syntaxhighlight>
  
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运行测试程序：
+
Run test program:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
$ matrix-rotary_encoder
 
$ matrix-rotary_encoder
 
</syntaxhighlight>
 
</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>
+
Note: this module is not plug and play therefore before running the module please make sure it is connected to an ARM board.<br>
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运行效果如下：<br>
+
Here is what you should observe:<br>
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
Get sw=0 value=1
 
Get sw=0 value=1
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Get sw=0 value=5
 
Get sw=0 value=5
 
</syntaxhighlight>
 
</syntaxhighlight>
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旋转模块时，能读到对应的值。
+
Rotating this module will trigger events and generate values.
  
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==代码说明==
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==Code Sample==
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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-rotary_encoder，内容如下:
+
This Matrix code sample can work with all the ARM boards mentioned in this module's wiki. The name of this code sample is "matrix-rotary_encoder". Here is its source code:
 
<syntaxhighlight lang="c">
 
<syntaxhighlight lang="c">
 
int main(int argc, char ** argv)  
 
int main(int argc, char ** argv)  
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}
 
}
 
</syntaxhighlight>
 
</syntaxhighlight>
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API说明参考维基：[[Matrix API reference manual/zh|Matrix API reference manual]] <br>
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For more details about this APIs called in this code sample refer to [[Matrix API reference manual]] <br>
  
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==相关资料==
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==Resources==
 +
 
 +
==Update Log==
 +
===June-24-2016===
 +
* Created English wiki

Latest revision as of 00:00, 24 June 2016

查看中文

1 Introduction

File:Matrix-Rotary Encoder.png

2 Features

File:Matrix-Rotary Encoder PCB.png

  • Pin Description:
Pin Description

3 Basic Device Operation

4 Applications

4.1 Connect to NanoPi M1

Refer to the following connection diagram to connect the module to the NanoPi M1:
Matrix-Rotary_Encoder_nanopi_m1

Connection Details:

Matrix-Rotary_Encoder NanoPi M1
R Pin7
G Pin8
B Pin10
V Pin4
G Pin6

4.2 Connect to NanoPi 2

Refer to the following connection diagram to connect the module to the NanoPi 2:
Matrix-Rotary_Encoder_nanopi_2

Connection Details:

Matrix-Rotary_Encoder NanoPi 2
R Pin7
G Pin8
B Pin10
V Pin4
G Pin6

4.3 Connect to NanoPi M2 / NanoPi 2 Fire

Refer to the following connection diagram to connect the module to the NanoPi M2/ NanoPi 2 Fire:
Matrix-Rotary_Encoder_nanopi_m2

Connection Details:

Matrix-Rotary_Encoder NanoPi M2
R Pin7
G Pin8
B Pin10
V Pin4
G Pin6

4.4 Connect to NanoPC-T2

Refer to the following connection diagram to connect the module to the NanoPC-T2:
Matrix-Rotary_Encoder_NanoPC-T2

Connection Details:

Matrix-Rotary_Encoder NanoPC-T2
R Pin15
G Pin16
B Pin17
V Pin29
G Pin30

5 Compile & Run Test Program

Boot your ARM board with Debian and copy the matrix code: 

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

If your cloning is done successfully a "matrix" directory will be generated.

Compile and install Matrix: 

$ cd matrix
$ make && make install

Run test program: 

$ matrix-rotary_encoder

Note: this module is not plug and play therefore before running the module please make sure it is connected to an ARM board.
Here is what you should observe:

Get sw=0 value=1
Get sw=0 value=2
Get sw=0 value=3
Get sw=0 value=4
Get sw=0 value=5

Rotating this module will trigger events and generate values.

6 Code Sample

This Matrix code sample can work with all the ARM boards mentioned in this module's wiki. The name of this code sample is "matrix-rotary_encoder". Here is its source code: 

int main(int argc, char ** argv) 
{ 
    int i = 0;
    int encoderSw = 0;
    int encoderValue = 0;
    int board;
    int swPin = GPIO_PIN(7);
    int siaPin = GPIO_PIN(8);
    int sibPin = GPIO_PIN(10);
 
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    }
    if (board == BOARD_NANOPI_T2) {
        swPin = GPIO_PIN(15);
        siaPin = GPIO_PIN(16);
        sibPin = GPIO_PIN(17);
    }
    system("modprobe "DRIVER_MODULE);
    if (rotaryEncoderInit(swPin, siaPin, sibPin)) {
        printf("Fail to init rotary encoder\n");
        goto err;
    }
    signal(SIGINT, encoderHandler);
    for (i=0; i<ENCODER_READ_TIMES; i++) {
        rotaryEncoderRead(ENCODER_SW, &encoderSw);
        rotaryEncoderRead(ENCODER_VALUE, &encoderValue);
        printf("Get sw=%d value=%d\n", encoderSw, encoderValue);
        sleep(1);
    }
    rotaryEncoderDeInit();
err:
    system("rmmod "DRIVER_MODULE);
    return 0;
}

For more details about this APIs called in this code sample refer to Matrix API reference manual

7 Resources

8 Update Log

8.1 June-24-2016

  • Created English wiki
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