Difference between revisions of "Matrix - Button"

Revision as of 01:48, 29 December 2015

查看中文

1 Introduction

按键

The Matrix-Button module is used to detect button events.
If the button is not pressed S will output high otherwise S will output low.

2 Features

3 PIN interface
PCB dimension (mm): 8 x 24

Pin Description:

Pin	Description
S	GPIO
V	Supply Voltage 5V
G	Ground

3 Basic Device Operation

The Matrix-Button is an instant(non self-lock) button. The button's status can be read from pin S in the 3-pin 2.54 mm spacing pin header.
If the button is not pressed S will output high otherwise S will output low.

4 Download Matrix Source Code

All the matrix modules' code samples are open source. They are maintained on GitHub --https://github.com/friendlyarm/matrix.git
Each branch in this hub contains the matrix modules' code samples for a board that the matrix modules can work with.

The nanopi branch contains the matrix modules' code samples for the NanoPi
The tiny4412 branch contains the matrix modules' code samples for the Tiny4412
The raspberrypi branch contains the matrix modules' code samples for the RaspberryPi

Please follow the steps below to get the source code:
Install the git utility on a PC running Ubuntu14.04

$ sudo apt-get install git

Clone the matrix code from GitHub

$ git clone https://github.com/friendlyarm/matrix.git

If this is successful a "matrix" directory will be generated, which will contain all the matrix modules' code samples.

5 Connect to NanoPi 2

5.1 Hardware Connection

Please refer to the following connection diagram to connect the Matrix-Button to the NanoPi 2:

Connection Details:

Matrix-Button	NanoPi 2
S	Pin7
V	Pin4
G	Pin6

5.2 Compile Test Program

Please login the matrix hub and enter the nanopi2 branch

$ cd matrix
$ git checkout nanopi2

Compile the matrix code

$ make CROSS_COMPILE=arm-linux- clean
$ make CROSS_COMPILE=arm-linux-
$ make CROSS_COMPILE=arm-linux- install

Note: please make sure to install the cross compiler "arm-linux-gcc-4.9.3" on your PC, which is used to compile files for the NanoPi2.
Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".

5.3 Run Test Program

Please insert a TF card which is flashed with Debian to a Linux host and mount its boot and rootfs sections.
We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy the driver, library and test program to the card.

$ cp modules /media/rootfs/ -r
$ cp install/lib/* /media/rootfs/lib/ -d
$ cp install/usr/bin/* /media/rootfs/usr/bin/

Insert this TF card to your NanoPi 2, power on and run the following commands.

$ cd /modules
$ insmod matrix_gpio_int.ko

Start the matrix-button program

$ matrix-button

Here is what you should expect:

5.4 Code Sample

static struct sensor button[] = {
        {
                GPIO_PIN(7),
                IRQ_TYPE_EDGE_FALLING,
        }
};
int main(int argc, char ** argv)
{
    int i;
    int retSize = -1;
    char value[ARRAY_SIZE(button)];
    int devFD = -1;
 
    if (argc == 2) {
        button[0].pin = atoi(argv[1]);
    }
 
    printf("Using GPIO_PIN(%d)\n", button[0].pin);
    if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
        printf("Fail to init sensor\n");
        return -1;
    }
    printf("Press the button...\n");
    if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(button))) == -1) {
        printf("Fail to read sensors\n");
    }
    if (retSize > 0) {
        i = 0;
        for (i=0; i<retSize; i++) {
            printf("Button[%d]:%d\n", i, value[i]);
        }
    }
    sensorDeinit(devFD);
    return 0;
}

6 Connect to NanoPi

6.1 Preparations

Please install a Debian on a NanoPi and an appropriate cross compiler on a PC. Please refer to wiki:NanoPi & How to Build the Compiling Environment
Compile a NanoPi kernel. Note: please use the kernel's source code from the nanopi-v4.1.y-matrix branch.

$ git clone https://github.com/friendlyarm/linux-4.x.y.git
$ cd linux-4.x.y
$ git checkout nanopi-v4.1.y-matrix
$ make nanopi_defconfig
$ touch .scmversion
$ make

A newly generated zImage will be under arch/arm/boot/. You can replace the one under "sd-fuse_nanopi/prebuilt" with this new image file.

6.2 Hardware Connection

Please refer to the following connection diagram to connect the Matrix-Button to the NanoPi

Connection Details:

Matrix-Button	NanoPi
S	Pin7
V	Pin4
G	Pin6

6.3 Compile Test Program

Please login the matrix hub and enter the nanopi branch

$ cd matrix
$ git checkout nanopi

Compile the matrix code

$ make CROSS_COMPILE=arm-linux- clean
$ make CROSS_COMPILE=arm-linux-
$ make CROSS_COMPILE=arm-linux- install

Note: please make sure to install the cross compiler "arm-linux-gcc-4.4.3" on your PC, which is used to compile files for the NanoPi-Debian.
Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".

6.4 Run Test Program

Please insert a TF card which is flashed with Debian to a Linux host and mount its boot and rootfs sections.
We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy these files to the card.

$ cp install/lib/* /media/rootfs/lib/ -d
$ cp install/usr/bin/* /media/rootfs/usr/bin/

Insert this TF card to your NanoPi, power on and run the following commands.

$ matrix-button

6.5 Code Sample

int main(int argc, char ** argv)
{
    int i;
    int retSize = -1;
    char value[ARRAY_SIZE(button)];
    int devFD = -1;
 
    printf("Using pin GPIO_PIN1\n");
    if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
        printf("Fail to init sensor\n");
        return -1;
    }
    printf("Press the button...\n");
    if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(button))) == -1) {
        printf("Fail to read sensors\n");
    }
    if (retSize > 0) {
        i = 0;
        for (i=0; i<retSize; i++) {
            printf("Button[%d]:%d\n", i, value[i]);
        }
    }
    sensorDeinit(devFD);
    return 0;
}

7 Connect to Tiny4412

7.1 Preparations

Please refer to the Tiny4412's user's manual to install a UbuntuCore on the Tiny4412 and install an appropriate cross compiler on a PC.
Note: only the Tiny4412SDK-1506 carrier board can work with this module.

7.2 Hardware Connection

Please refer to the following diagram to connect the Matrix-Button to the Tiny4412

Connection Details:

Matrix-Button	Tiny4412
S	GPIO1 S
V	GPIO1 5V
G	GPIO1 GND

7.3 Compile Test Program

Please login the Matrix hub and enter the matrix-tiny4412 branch

$ cd matrix
$ git checkout tiny4412

Compile the matrix code

$ make CROSS_COMPILE=arm-linux-gnueabihf- clean
$ make CROSS_COMPILE=arm-linux-gnueabihf-
$ make CROSS_COMPILE=arm-linux-gnueabihf- install

Note: please make sure to install the cross compiler "arm-linux-gnueabihf-gcc-4.7.3" on your PC, which is used to compile files for the Tiny4412-UbuntuCore.
Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".

7.4 Run Test Program

Please insert an SD card which is flashed with UbuntuCore to a Linux host and mount its boot and rootfs sections.
We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy these files the card.

$ cp install/usr/bin/* /media/rootfs/usr/bin/
$ cp install/lib/* /media/rootfs/lib/ -d

Insert this card to your Tiny4412, power on and run the following command to start the Matrix-Button test program。

$ matrix-button

Note: this module is not plug and play therefore before running the module please make sure it is connected to a Tiny4412.

7.5 Code Sample

int main(int argc, char ** argv)
{
    int i;
    int retSize = -1;
    char value[ARRAY_SIZE(button)];
    int devFD = -1;
 
    printf("Using pin GPIO_PIN1\n");
    if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
        printf("Fail to init sensor\n");
        return -1;
    }
    printf("Press the button...\n");
    if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(button))) == -1) {
        printf("Fail to read sensors\n");
    }
    if (retSize > 0) {
        i = 0;
        for (i=0; i<retSize; i++) {
            printf("Button[%d]:%d\n", i, value[i]);
        }
    }
    sensorDeinit(devFD);
    return 0;
}

Difference between revisions of "Matrix - Button"

Revision as of 01:48, 29 December 2015

Contents

1 Introduction

2 Features

3 Basic Device Operation

4 Download Matrix Source Code

5 Connect to NanoPi 2

5.1 Hardware Connection

5.2 Compile Test Program

5.3 Run Test Program

5.4 Code Sample

6 Connect to NanoPi

6.1 Preparations

6.2 Hardware Connection

6.3 Compile Test Program

6.4 Run Test Program

6.5 Code Sample

7 Connect to Tiny4412

7.1 Preparations

7.2 Hardware Connection

7.3 Compile Test Program

7.4 Run Test Program

7.5 Code Sample

8 Connect to RaspberryPi

9 Connect to Arduino

10 Resources

Navigation menu

Personal tools

Namespaces

Variants

Views

More

Search

Navigation

Products

FAQ

Support

Tools

@@ Line 1: / Line 1: @@
-[[Matrix - Button|English]]
+[[Matrix - Button/zh|查看中文]]
-==介绍==
+==Introduction==
 [[File:Btn01.jpg|thumb|按键]]
-* 模块Matrix-Button用于检测按键事件。
+* The Matrix-Button module is used to detect button events.
-* 未按时输出高电平，按下后输出低电平。
+* If the button is not pressed S will output high otherwise S will output low.
-==特性==
+==Features==
-* 使用标准的3 PIN接口
+* 3 PIN interface
-* 尺寸为 8x24mm
+* PCB dimension (mm): 8 x 24
-* PCB尺寸（mm）：8x24
 [[File:btn002.png | frameless|400px|BTN-01.PCB]]
-* 引脚说明:
+* Pin Description:
 {| class="wikitable"
 |-
-|名称 || 描述
+|Pin || Description
 |-
 |S    || GPIO
 |-
-|V    || 电源5V
+|V    || Supply Voltage 5V
 |-
-|G    || 地
+|G    || Ground
 |}
-==工作原理==
+==Basic Device Operation==
-* Matrix-Button主要器件是一个瞬时（非自锁）按钮开关，通过3-Pin 2.54mm排针中的S信号输出按钮开关的状态。
+* The Matrix-Button is an instant(non self-lock) button. The button's status can be read from pin S in the 3-pin 2.54 mm spacing pin header.
-* 平时没有按下按钮时触点断开，S输出高电平；当按下按钮时触点导通，S输出低电平，直到松开才恢复高电平。
+* If the button is not pressed S will output high otherwise S will output low.
-==下载Matrix源码==
+==Download Matrix Source Code==
-Matrix配件相关的代码是完全开源的，统一由一个仓库进行管理：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>
-该仓库里不同的分支代表着Matrix配件所支持的不同开发板。<br>
+Each branch in this hub contains the matrix modules' code samples for a board that the matrix modules can work with.<br>
-* nanopi分支用于支持NanoPi；
+* The nanopi branch contains the matrix modules' code samples for the NanoPi
-* nanopi2分支用于支持NanoPi 2；
+* The tiny4412 branch contains the matrix modules' code samples for the Tiny4412
-* tiny4412分支用于支持Tiny4412；
+* The raspberrypi branch contains the matrix modules' code samples for the RaspberryPi
-* raspberrypi分支用于支持RaspberryPi；
-在主机PC上安装git，以Ubuntu14.04为例
+Please follow the steps below to get the source code:<br>
+Install the git utility on a PC running Ubuntu14.04
 <syntaxhighlight lang="bash">
 $ sudo apt-get install git
 </syntaxhighlight>
-克隆Matrix配件代码仓库
+Clone the matrix code from GitHub
 <syntaxhighlight lang="bash">
 $ 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，里面存放着所有Matrix配件的代码。
+If this is successful a "matrix" directory will be generated, which will contain all the matrix modules' code samples.
-==与NanoPi 2连接使用==
+==Connect to NanoPi 2==
-===硬件连接===
+===Hardware Connection===
-参考下图连接模块Matrix-Button和NanoPi 2：<br>
+Please refer to the following connection diagram to connect the Matrix-Button to the NanoPi 2:<br>
 [[File:Matrix-Button_nanopi_2.jpg|frameless|600px|Matrix-Button_nanopi_2]]
-连接说明：
+Connection Details:
 {| class="wikitable"
 |-
@@ Line 62: / Line 62: @@
 |G   || Pin6
 |}
-===编译测试程序===
+===Compile Test Program===
-进入Matrix代码仓库，切换到nanopi2分支
+Please login the matrix hub and enter the nanopi2 branch
 <syntaxhighlight lang="bash">
 $ cd matrix
@@ Line 69: / Line 69: @@
 </syntaxhighlight>
-编译Matrix配件代码
+Compile the matrix code
 <syntaxhighlight lang="bash">
 $ make CROSS_COMPILE=arm-linux- clean
@@ Line 75: / Line 75: @@
 $ make CROSS_COMPILE=arm-linux- install
 </syntaxhighlight>
-注意：请确保你的主机PC当前使用的交叉编译器为NanoPi 2配套的arm-linux-gcc-4.9.3。<br>
+Note: please make sure to install the cross compiler "arm-linux-gcc-4.9.3" on your PC, which is used to compile files for the NanoPi2.<br>
-编译成功后库文件位于install/lib目录下，而测试程序则位于install/usr/bin目录下，模块Matrix-Button对应的测试程序为matrix-button。<br>
+Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".<br>
-===运行测试程序===
+===Run Test Program===
-将带有Debian系统的SD卡插入一台运行Linux的电脑，可以挂载SD卡上的boot和rootfs分区。<br>
+Please insert a TF card which is flashed with Debian to a Linux host and mount its boot and rootfs sections.<br>
-假设rootfs分区的挂载路径为/media/rootfs，执行以下命令将Matrix的硬件驱动、库文件和测试程序拷贝到NanoPi 2的文件系统上。<br>
+We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy the driver, library and test program to the card.<br>
 <syntaxhighlight lang="bash">
 $ cp modules /media/rootfs/ -r
@@ Line 87: / Line 87: @@
 </syntaxhighlight>
-将SD卡重新插入NanoPi 2，上电启动，在Debian的shell终端中执行以下命令加载硬件驱动。<br>
+Insert this TF card to your NanoPi 2, power on and run the following commands.<br>
 <syntaxhighlight lang="bash">
 $ cd /modules
@@ Line 93: / Line 93: @@
 </syntaxhighlight>
-运行模块Matrix-Button的测试程序。<br>
+Start the matrix-button program<br>
 <syntaxhighlight lang="bash">
 $ matrix-button
 </syntaxhighlight>
-运行效果如下：<br>
+Here is what you should expect:<br>
 [[File:matrix-button_result.png|frameless|600px|matrix-button_result]]
-===代码展示===
+===Code Sample===
 <syntaxhighlight lang="c">
 static struct sensor button[] = {
@@ Line 140: / Line 140: @@
 </syntaxhighlight>
-==与NanoPi连接使用==
+==Connect to NanoPi==
-===准备工作===
+===Preparations===
-在NanoPi上运行Debian系统，然后在主机PC上安装并使用相应的编译器，参考wiki: [[NanoPi/zh|NanoPi]] & [[How_to_build_the_Compiling_Environment/zh|How to Build the Compiling Environment]]。<br>
+Please install a Debian on a NanoPi and an appropriate cross compiler on a PC. Please refer to wiki:[[NanoPi/zh|NanoPi]] & [[How_to_build_the_Compiling_Environment/zh|How to Build the Compiling Environment]] <br>
-注意: 只有使用nanopi-v4.1.y-matrix分支编译出来的内核才能配合Matrix配件正常工作。<br>
+Compile a NanoPi kernel. Note: please use the kernel's source code from the nanopi-v4.1.y-matrix branch.<br>
-下载NanoPi内核源代码并编译: <br>
 <syntaxhighlight lang="bash">
 $ git clone https://github.com/friendlyarm/linux-4.x.y.git
@@ Line 153: / Line 152: @@
 $ make
 </syntaxhighlight>
-编译好后的zImage位于内核源码arch/arm/boot/目录下，把该zImage替换掉NanoPi烧写文件sd-fuse_nanopi/prebuilt下的zImage，重新制作SD卡即可。
+A newly generated zImage will be under arch/arm/boot/. You can replace the one under "sd-fuse_nanopi/prebuilt" with this new image file.
-===硬件连接===
+===Hardware Connection===
-参考下图连接模块Matrix-Button和NanoPi：<br>
+Please refer to the following connection diagram to connect the Matrix-Button to the NanoPi <br>
 [[File:matrix-button_nanopi.jpg|frameless|600px|matrix-button_nanopi]]
-连接说明：
+Connection Details:
 {| class="wikitable"
 |-
@@ Line 166: / Line 165: @@
 |S   || Pin7
 |-
-|V   || Pin4
+|V    || Pin4
 |-
-|G   || Pin6
+|G       || Pin6
 |}
-===编译测试程序===
+===Compile Test Program===
-进入Matrix代码仓库，切换到nanopi分支
+Please login the matrix hub and enter the nanopi branch
 <syntaxhighlight lang="bash">
 $ cd matrix
@@ Line 178: / Line 177: @@
 </syntaxhighlight>
-编译Matrix配件代码
+Compile the matrix code
 <syntaxhighlight lang="bash">
 $ make CROSS_COMPILE=arm-linux- clean
@@ Line 184: / Line 183: @@
 $ make CROSS_COMPILE=arm-linux- install
 </syntaxhighlight>
-注意：请确保你的主机PC当前使用的交叉编译器为NanoPi-Debian配套的arm-linux-gcc-4.4.3。<br>
+Note: please make sure to install the cross compiler "arm-linux-gcc-4.4.3" on your PC, which is used to compile files for the NanoPi-Debian.<br>
-编译出来的库文件位于install/lib目录下，而测试程序则位于install/usr/bin目录下，模块Matrix-Button对应的测试程序为matrix-button。<br>
+Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".<br>
-===运行测试程序===
+===Run Test Program===
-将带有Debian系统的SD卡插入一台运行Linux的电脑，可以挂载SD卡上的boot和rootfs分区。<br>
+Please insert a TF card which is flashed with Debian to a Linux host and mount its boot and rootfs sections.<br>
-假设rootfs分区的挂载路径为/media/rootfs，执行以下命令可将Matrix的所有库文件和测试程序拷贝到NanoPi的文件系统上。<br>
+We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy these files to the card.<br>
 <syntaxhighlight lang="bash">
-$ cp install/usr/bin/* /media/rootfs/usr/bin/
 $ cp install/lib/* /media/rootfs/lib/ -d
+$ cp install/usr/bin/* /media/rootfs/usr/bin/
 </syntaxhighlight>
-将SD卡重新插入NanoPi，上电启动，在Debian的shell终端中执行以下命令运行模块Matrix-Button的测试程序。<br>
+Insert this TF card to your NanoPi, power on and run the following commands.<br>
 <syntaxhighlight lang="bash">
 $ matrix-button
 </syntaxhighlight>
-注意：此模块并不支持热插拔，启动系统前需要确保硬件正常连接。
-===代码展示===
+===Code Sample===
 <syntaxhighlight lang="c">
 int main(int argc, char ** argv)
@@ Line 230: / Line 228: @@
 </syntaxhighlight>
-==与Tiny4412连接使用==
+==Connect to Tiny4412==
-===准备工作===
+===Preparations===
-参考Tiny4412光盘里的《友善之臂Ubuntu使用手册》，在Tiny4412上运行UbuntuCore系统，然后在主机PC上安装并使用相应的编译器。<br>
+Please refer to the Tiny4412's user's manual to install a UbuntuCore on the Tiny4412 and install an appropriate cross compiler on a PC.<br>
-注意：只能使用Tiny4412SDK-1506的底板。
+Note: only the Tiny4412SDK-1506 carrier board can work with this module.
-===硬件连接===
+===Hardware Connection===
-参考下图连接模块Matrix-Button和Tiny4412 <br>
+Please refer to the following diagram to connect the Matrix-Button to the Tiny4412 <br>
 [[File:matrix-button_tiny4412.jpg|frameless|600px|matrix-button_tiny4412]]
-连接说明：
+Connection Details:
 {| class="wikitable"
 |-
@@ Line 251: / Line 249: @@
 |}
-===编译测试程序===
+===Compile Test Program===
-进入Matrix代码仓库，切换到tiny4412分支
+Please login the Matrix hub and enter the matrix-tiny4412 branch
 <syntaxhighlight lang="bash">
 $ cd matrix
@@ Line 258: / Line 256: @@
 </syntaxhighlight>
-编译Matrix配件代码
+Compile the matrix code
 <syntaxhighlight lang="bash">
 $ make CROSS_COMPILE=arm-linux-gnueabihf- clean
@@ Line 264: / Line 262: @@
 $ make CROSS_COMPILE=arm-linux-gnueabihf- install
 </syntaxhighlight>
-注意：请确保你的主机PC当前使用的交叉编译器为Tiny4412-UbuntuCore配套的arm-linux-gnueabihf-gcc-4.7.3。<br>
+Note: please make sure to install the cross compiler "arm-linux-gnueabihf-gcc-4.7.3" on your PC, which is used to compile files for the Tiny4412-UbuntuCore. <br>
-编译出来的库文件位于install/lib目录下，而测试程序则位于install/usr/bin目录下，模块Matrix-Button对应的测试程序为matrix-button。
+Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".
-===运行测试程序===
+===Run Test Program===
-将带有UbuntuCore系统的SD卡插入一台运行Linux的电脑，可以挂载SD卡上的boot和rootfs分区。<br>
+Please insert an SD card which is flashed with UbuntuCore to a Linux host and mount its boot and rootfs sections.<br>
-假设rootfs分区的挂载路径为/media/rootfs，执行以下命令可将Matrix的所有库文件和测试程序拷贝到Tiny4412的文件系统上。<br>
+We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy these files the card.<br>
 <syntaxhighlight lang="bash">
 $ cp install/usr/bin/* /media/rootfs/usr/bin/
@@ Line 275: / Line 273: @@
 </syntaxhighlight>
-将SD卡重新插入Tiny4412，上电启动，在UbuntuCore的shell终端中执行以下命令运行模块Matrix-Button的测试程序。<br>
+Insert this card to your Tiny4412, power on and run the following command to start the Matrix-Button test program。<br>
 <syntaxhighlight lang="bash">
 $ matrix-button
 </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。
+Note: this module is not plug and play therefore before running the module please make sure it is connected to a Tiny4412.
-===代码展示===
+===Code Sample===
 <syntaxhighlight lang="c">
 int main(int argc, char ** argv)
@@ Line 289: / Line 287: @@
      char value[ARRAY_SIZE(button)];
      int devFD = -1;
      printf("Using pin GPIO_PIN1\n");
      if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
@@ Line 310: / Line 308: @@
 </syntaxhighlight>
-==与RaspberryPi连接使用==
+==Connect to RaspberryPi==
+==Connect to Arduino==
+==Resources==
+<!--
+==Introduction==
+[[Image:Btn.png|thumb|按键]]
+The Matrix-Button is an instant(non self-lock) button. The button's status can be read from pin S in the 3-pin 2.54 mm spacing pin header. If the button is not pressed S will output high otherwise S will output low.
+==Features==
+* Instant, non self-lock
+* Tiny, easy to be used in various situations
+* 2.54mm spacing pin
+==How To==
+===Connection===
+*Connect to Tiny4412 SDK (1506)
+::Connect the module's pin S to GPIO PIN1, pin V to 5V and pin G grounded
+===Code Sample in C Under Linux===
+<syntaxhighlight lang="c">
+#include <stdio.h>
+#include "libfahw.h"
+static struct sensor button[] = {
+        {
+                TINY4412_GPIO_PIN1,
+                IRQ_TYPE_EDGE_FALLING,
+        }
+};
+int main(void)
+{
+    int i;
+    int retSize = -1;
+    char value[ARRAY_SIZE(button)];
+    int devFD = -1;
+    if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
+        printf("Fail to init sensor\n");
+        return -1;
+    }
+    printf("Press the button...\n");
+    if (( retSize = sensorRead(devFD, value, ARRAY_SIZE(button)) ) == -1) {
+        printf("Fail to read sensors\n");
+    }
+    if (retSize > 0) {
+        i = 0;
+        for (i=0; i<retSize; i++) {
+            printf("Button[%d]:%d\n", i, value[i]);
+        }
+    }
+    sensorDeinit(devFD);
+    return 0;
+}
+</syntaxhighlight>
+===Compile and Run===
+<syntaxhighlight lang="bash">
+git clone http://github.com/friendlyarm/fa-hardware.git
+cd fa-hardware
+cd demo
+cd matrix-button
+make
+</syntaxhighlight>
+Copy your compiled bin to your board and you are ready to go.
-==与Arduino连接使用==
+==Resources==
-==相关资料==
+-->