Difference between revisions of "Matrix - Ultrasonic Ranger"

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[[File:Ultrasonic Ranger.png|thumb|matrix Ultrasonic Ranger]]
 
[[File:Ultrasonic Ranger.png|thumb|matrix Ultrasonic Ranger]]
  
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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>
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Refer to the following connection diagram to connect the module to the NanoPi M1:<br>
 
[[File:Matrix-Ultrasonic_Ranger_nanopi_m1.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_nanopi_m1]]
 
[[File:Matrix-Ultrasonic_Ranger_nanopi_m1.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_nanopi_m1]]
  
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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 2===
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===Connect to NanoPi 2===
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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 2:<br>
 
[[File:Matrix-Ultrasonic_Ranger_nanopi_2.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_nanopi_2]]
 
[[File:Matrix-Ultrasonic_Ranger_nanopi_2.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_nanopi_2]]
  
−
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-Ultrasonic_Ranger_nanopi_m2.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_nanopi_m2]]
 
[[File:Matrix-Ultrasonic_Ranger_nanopi_m2.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_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-Ultrasonic_Ranger_NanoPC-T2.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_NanoPC-T2]]
 
[[File:Matrix-Ultrasonic_Ranger_NanoPC-T2.jpg|frameless|600px|Matrix-Ultrasonic_Ranger_NanoPC-T2]]
  
−
连接说明：
+
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>
−
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：
+
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-ultrasonic_ranger
 
$ matrix-ultrasonic_ranger
 
</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">
 
The distance is  24 cm
 
The distance is  24 cm
 
</syntaxhighlight>
 
</syntaxhighlight>
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将超模波模块的正面对准待测距物体，测距完毕后程序会打印距离值。
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When you place an object in front of the module the distance between the object and the module will be measured and printed.
  
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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-ultrasonic_ranger，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-ultrasonic_ranger". 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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* 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
−
 
+
===June-28-2016===
 +
* Reorganized and simplified wiki
 
<!--
 
<!--
  

Latest revision as of 13:56, 28 June 2016

查看中文

1 Introduction

Ultrasonic Ranger01
  • The Matrix-Ultrasonic_Ranger is used to measure the distance.
  • The module's sensor emits a sound wave, which bounces off a reflective surface and returns to the sensor. Then, using the amount of time it takes for the wave to return to the sensor, the distance to the object can be computed.

2 Features

  • 5V Power
  • Range: 5 cm - 300 cm，Accuracy: 1 cm
  • One wire gpio
  • PCB Dimension (mm): 20 x 40

超声波PCB

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

3 Basic Device Operation

  • The sensor emits a 40kHz, 6 mm sound wave, which bounces off a reflective surface and returns to the sensor. The receiver converts ultrasound waves to electrical signals in mV.
  • The master sends a signal to the module starting to emit a sound wave. After the module receives the returned signal it will will generate a high level indicating the elapsed time and the distance will be calculated by distance = (elapsed time * speed of sound)/2.
matrix Ultrasonic Ranger

4 Applications

4.1 Connect to NanoPi M1

Refer to the following connection diagram to connect the module to the NanoPi M1:
Matrix-Ultrasonic_Ranger_nanopi_m1

Connection Details:

Matrix-Ultrasonic_Ranger 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-Ultrasonic_Ranger_nanopi_2

Connection Details:

Matrix-Ultrasonic_Ranger 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-Ultrasonic_Ranger_nanopi_m2

Connection Details:

Matrix-Ultrasonic_Ranger 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-Ultrasonic_Ranger_NanoPC-T2

Connection Details:

Matrix-Ultrasonic_Ranger 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-ultrasonic_ranger

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:

The distance is  24 cm

When you place an object in front of the module the distance between the object and the module will be measured and printed.

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-ultrasonic_ranger". Here is its source code: 

int main(int argc, char ** argv)
{
    int distance = -1;
    int pin = GPIO_PIN(7);
    int board;
 
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    }
    if (board == BOARD_NANOPI_T2)
        pin = GPIO_PIN(15);
 
    system("modprobe "DRIVER_MODULE);
    if (Hcsr04Init(pin) == -1) {
        printf("Fail to init hcsr04\n");
        goto err;
    }
    if (Hcsr04Read(&distance) != -1) {
        printf("The distance is %3d cm\n", distance);
    } else {
        printf("Faid to get distance\n");
    }
    Hcsr04DeInit();
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 Feb-23-2016

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

8.2 June-28-2016

  • Reorganized and simplified wiki
Retrieved from "https://wiki.friendlyelec.com/wiki/index.php?title=Matrix_-_Ultrasonic_Ranger&oldid=6309"