Difference between revisions of "Matrix - One Touch Sensor"

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==工作原理==
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==Basic Device Operation==
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TTP223是一颗单键电容式触摸检测IC,它是利用电荷转移技术，通过检测压克力、塑料、玻璃、陶瓷、木材等绝缘介质上的按键电极与地的寄生电容电荷的微小改变来进行检测。
+
The TTP223 is a one key capacitive touch pad detector IC. It measures changes of electric charges stored in the touch pad electrode with parasitic capacitance. The touch pad is usually attached to an insulator:acrylic, glass, porcelain, wood and etc.
  
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==硬件连接==
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==Applications==
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===连接NanoPi M1===
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===Connect to NanoPi M1===
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参考下图连接模块：<br>
+
Refer to the following connection diagram to connect the module to the NanoPi M1:<br>
 
[[File:Matrix-One_Touch_Sensor_nanopi_m1.jpg|frameless|600px|Matrix-One_Touch_Sensor_nanopi_m1]]
 
[[File:Matrix-One_Touch_Sensor_nanopi_m1.jpg|frameless|600px|Matrix-One_Touch_Sensor_nanopi_m1]]
  
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连接说明：
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Connection Details:
 
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===连接NanoPi 2===
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===Connect to NanoPi 2===
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参考下图连接模块：<br>
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Refer to the following connection diagram to connect the module to the NanoPi 2:<br>
 
[[File:Matrix-One_Touch_Sensor_nanopi_2.jpg|frameless|600px|Matrix-One_Touch_Sensor_nanopi_2]]
 
[[File:Matrix-One_Touch_Sensor_nanopi_2.jpg|frameless|600px|Matrix-One_Touch_Sensor_nanopi_2]]
  
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连接说明：
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Connection Details:
 
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===连接NanoPi M2 / NanoPi 2 Fire===
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===Connect to NanoPi M2 / NanoPi 2 Fire===
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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>
+
Refer to the following connection diagram to connect the module to the NanoPi M2/ NanoPi 2 Fire.<br>
−
参考下图连接模块：<br>
+
 
[[File:Matrix-One_Touch_Sensor_nanopi_m2.jpg|frameless|600px|Matrix-One_Touch_Sensor_nanopi_m2]]
 
[[File:Matrix-One_Touch_Sensor_nanopi_m2.jpg|frameless|600px|Matrix-One_Touch_Sensor_nanopi_m2]]
  
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连接说明：
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Connection Details:
 
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===连接NanoPC-T2===
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===Connect to NanoPC-T2===
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参考下图连接模块：<br>
+
Refer to the following connection diagram to connect the module to the NanoPC-T2:<br>
 
[[File:Matrix-One_Touch_Sensor_NanoPC-T2.jpg|frameless|600px|Matrix-One_Touch_Sensor_NanoPC-T2]]
 
[[File:Matrix-One_Touch_Sensor_NanoPC-T2.jpg|frameless|600px|Matrix-One_Touch_Sensor_NanoPC-T2]]
  
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连接说明：
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Connection Details:
 
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==编译运行测试程序==
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==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>
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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.
  
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编译并安装Matrix：
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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：
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Run test program:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
$ matrix-gpio_int
 
$ matrix-gpio_int
 
</syntaxhighlight>
 
</syntaxhighlight>
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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>
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Here is what you should observe:<br>
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
Waiting event...
 
Waiting event...
 
Device[0] value is 1
 
Device[0] value is 1
 
</syntaxhighlight>
 
</syntaxhighlight>
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用手指按压模块时会检测到事件。
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When you touch the module's active area an event will be triggered and detected.
  
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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-gpio_int，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-gpio_int". 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>
  
 
==Resources==
 
==Resources==
 +
 +
==Update Log==
 +
===June-22-2016===
 +
* Created English wiki

Latest revision as of 00:10, 22 June 2016

查看中文

1 Introduction

Matrix-One Touch Sensor.png
  • The Matrix One_Touch_Sensor is a digital one capacitive touch key module. It uses the one key capacitive touch pad detector IC TTP223. It has a touch key with stable touching detection. It is designed for replacing traditional direct button key with diverse pad size.By default it outputs low. When a finger touches the touch key it outputs high.

2 Features

  • Standard 3Pin interface
  • PCB dimension(mm): 16 x 24

Matrix-One Touch Sensor PCB.png

  • Pin Description:
Pin Description
S GPIO
V Supply Voltage 5V
G Ground

3 Basic Device Operation

The TTP223 is a one key capacitive touch pad detector IC. It measures changes of electric charges stored in the touch pad electrode with parasitic capacitance. The touch pad is usually attached to an insulator:acrylic, glass, porcelain, wood and etc.

4 Applications

4.1 Connect to NanoPi M1

Refer to the following connection diagram to connect the module to the NanoPi M1:
Matrix-One_Touch_Sensor_nanopi_m1

Connection Details:

Matrix-One_Touch_Sensor NanoPi M1
S Pin7
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-One_Touch_Sensor_nanopi_2

Connection Details:

Matrix-One_Touch_Sensor NanoPi 2
S Pin7
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-One_Touch_Sensor_nanopi_m2

Connection Details:

Matrix-One_Touch_Sensor NanoPi M2
S Pin7
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-One_Touch_Sensor_NanoPC-T2

Connection Details:

Matrix-One_Touch_Sensor NanoPC-T2
S Pin15
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-gpio_int

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:

Waiting event...
Device[0] value is 1

When you touch the module's active area an event will be triggered and detected.

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-gpio_int". Here is its source code: 

int main(int argc, char ** argv)
{
    int i, board;
    int retSize = -1;
    char value[ARRAY_SIZE(dev)];
 
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    }
 
    if (argc == 2)
        dev[0].pin = atoi(argv[1]);
    system("modprobe "DRIVER_MODULE);
    signal(SIGINT, intHandler);
    if (board == BOARD_NANOPI_T2)
        dev[0].pin = GPIO_PIN(15);
    printf("Use GPIO_PIN(%d)\n", dev[0].pin);
    if ((devFD =sensorInit(dev, ARRAY_SIZE(dev))) == -1) {
        printf("Fail to init sensor\n");
        goto err;
    }
    printf("Waiting event...\n");
    if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(dev))) == -1) {
        printf("Fail to read sensors\n");
    }
    if (retSize > 0) {
        i = 0;
        for (i=0; i<retSize; i++) {
            printf("Device[%d] value is %d\n", i, value[i]);
        }
    }
    sensorDeinit(devFD);
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-22-2016

  • Created English wiki
Retrieved from "https://wiki.friendlyelec.com/wiki/index.php?title=Matrix_-_One_Touch_Sensor&oldid=6190"