Difference between revisions of "Matrix - Buzzer"

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A passive buzzer will not tweet if DC signals are used; instead, you need to use square waves whose frequency is between 2K and 5K to drive it. If you use GPIO signals to drive it you need to pull the GPIO high first and then low to generate oscillation. The oscillation frequency is generated by the time in which GPIO signals turn from high to low. The buzzer will generate different sounds based on different frequencies.
 
A passive buzzer will not tweet if DC signals are used; instead, you need to use square waves whose frequency is between 2K and 5K to drive it. If you use GPIO signals to drive it you need to pull the GPIO high first and then low to generate oscillation. The oscillation frequency is generated by the time in which GPIO signals turn from high to low. The buzzer will generate different sounds based on different frequencies.
  
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==硬件连接==
+
==Applications==
−
 
+
===Connect to NanoPi 2===
−
===连接NanoPi 2===
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Refer to the following connection diagram to connect the module to the NanoPi M1<br>
−
参考下图连接模块：<br>
+
 
[[File:Matrix-Buzzer_nanopi_2.jpg|frameless|600px|Matrix-Buzzer_nanopi_2]]
 
[[File:Matrix-Buzzer_nanopi_2.jpg|frameless|600px|Matrix-Buzzer_nanopi_2]]
  
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连接说明：
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Connection Details:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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|}
 
|}
  
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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-Buzzer_nanopi_m2.jpg|frameless|600px|Matrix-Buzzer_nanopi_m2]]
 
[[File:Matrix-Buzzer_nanopi_m2.jpg|frameless|600px|Matrix-Buzzer_nanopi_m2]]
  
−
连接说明：
+
Connection Details:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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|}
 
|}
  
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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-Buzzer_nanopc_t2.jpg|frameless|600px|Matrix-Buzzer_nanopc_t2]]
 
[[File:Matrix-Buzzer_nanopc_t2.jpg|frameless|600px|Matrix-Buzzer_nanopc_t2]]
  
−
连接说明：
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Connection Details:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
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|}
 
|}
  
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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。
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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-pwm
 
$ matrix-pwm
 
</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">
 
Using default config: channel=0 freq=1000Hz duty=500
 
Using default config: channel=0 freq=1000Hz duty=500
 
Press enter to stop PWM
 
Press enter to stop PWM
 
</syntaxhighlight>
 
</syntaxhighlight>
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可以听到蜂鸣器鸣叫，占空比的范围为0-1000，键盘敲入回车键停止pwm输出。
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You can hear the buzzer beeping. The range of the duty cycle  is 0 ~ 1000. When you hit "enter" the buzzer will be stopped.
  
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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-pwm，内容如下:
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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-pwm". Here is its source code:
 
<syntaxhighlight lang="c">
 
<syntaxhighlight lang="c">
 
int main(int argc, char ** argv)
 
int main(int argc, char ** argv)
Line 138: Line 136:
 
}
 
}
 
</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>
 
<!---
 
<!---
 
==Download Matrix Source Code==
 
==Download Matrix Source Code==
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* Added the description for "NanoPi 2 branch" in Section 4
 
* Added the description for "NanoPi 2 branch" in Section 4
 
* Added Section 5: Connect to NanoPi 2
 
* Added Section 5: Connect to NanoPi 2
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+
===June-17-2016===
 +
* Re-organized and simplified wiki
  
 
<!--
 
<!--

Latest revision as of 10:32, 19 June 2016

查看中文

1 Introduction

Buzzer
  • The Matrix-Buzzer is a passive buzzer. To drive this buzzer an oscillating source generating 2K - 5K square waves is needed.
  • It can be used in electronic devices that need sound generators.

2 Features

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

Buzzer PCB

  • Pin Description:
Pin Description
V Supply Voltage 5V
G Ground
S PWM Input

3 Basic Device Operation

A passive buzzer will not tweet if DC signals are used; instead, you need to use square waves whose frequency is between 2K and 5K to drive it. If you use GPIO signals to drive it you need to pull the GPIO high first and then low to generate oscillation. The oscillation frequency is generated by the time in which GPIO signals turn from high to low. The buzzer will generate different sounds based on different frequencies.

4 Applications

4.1 Connect to NanoPi 2

Refer to the following connection diagram to connect the module to the NanoPi M1
Matrix-Buzzer_nanopi_2

Connection Details:

Matrix-Buzzer NanoPi 2
G Pin6
V Pin4
S Pin22

4.2 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-Buzzer_nanopi_m2

Connection Details:

Matrix-Buzzer NanoPi M2
G Pin6
V Pin4
S Pin12

4.3 Connect to NanoPC-T2

Refer to the following connection diagram to connect the module to the NanoPC-T2:
Matrix-Buzzer_nanopc_t2

Connection Details:

Matrix-Buzzer NanoPC-T2
S Pin23
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-pwm

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:

Using default config: channel=0 freq=1000Hz duty=500
Press enter to stop PWM

You can hear the buzzer beeping. The range of the duty cycle is 0 ~ 1000. When you hit "enter" the buzzer will be stopped.

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-pwm". Here is its source code: 

int main(int argc, char ** argv)
{
    int Hz, duty, board;
 
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    } 
 
    system("modprobe "DRIVER_MODULE);
    signal(SIGINT, intHandler);
    if (argc == 4) {
        // Usage:matrix-pwm channel freq duty[0~1000]
        pwm = atoi(argv[1]);
        Hz = atoi(argv[2]);
        duty = atoi(argv[3]);
    } else {
        Hz = 1000;
        duty = 500;
        printf("Using default config: channel=%d freq=%dHz duty=%d\n", pwm, Hz, duty);
    }
    if (PWMPlay(pwm, Hz, duty) == -1) {
        printf("Fail to output PWM\n");
    }  
    printf("Press enter to stop PWM\n");
    getchar();
    PWMStop(pwm);
    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 Feb-23-2016

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

8.2 June-17-2016

  • Re-organized and simplified wiki


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