Difference between revisions of "Matrix - LED"

From FriendlyELEC WiKi
Jump to: navigation, search
(→‎Update Log)
 
(2 intermediate revisions by the same user not shown)
Line 29: Line 29:
 
The module has three 2.54 mm spacing pins: V(supply voltage),G(ground) and S(signal) which is connected to a triode to turn the LED on or off. You can write high or low, or PWN signals(3.3V or 5V) to S. When you write high to S the LED will turn on and become brightest. When you write low to S the LED will turn off. If you write PWM signals to S the LED's brightness will vary depending on the PWM's signal variances.  
 
The module has three 2.54 mm spacing pins: V(supply voltage),G(ground) and S(signal) which is connected to a triode to turn the LED on or off. You can write high or low, or PWN signals(3.3V or 5V) to S. When you write high to S the LED will turn on and become brightest. When you write low to S the LED will turn off. If you write PWM signals to S the LED's brightness will vary depending on the PWM's signal variances.  
  
−
==硬件连接==
+
==Applications==
−
===连接NanoPi M1===
+
===Connect to NanoPi M1===
−
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-LED_nanopi_m1.jpg|frameless|600px|Matrix-LED_nanopi_m1]]
 
[[File:Matrix-LED_nanopi_m1.jpg|frameless|600px|Matrix-LED_nanopi_m1]]
  
−
连接说明：
+
Connection Details:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
Line 46: Line 46:
 
|}
 
|}
  
−
===连接NanoPi 2===
+
===Connect to NanoPi 2===
−
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-LED_nanopi_2.jpg|frameless|600px|Matrix-LED_nanopi_2]]
 
[[File:Matrix-LED_nanopi_2.jpg|frameless|600px|Matrix-LED_nanopi_2]]
  
−
连接说明：
+
Connection Details:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
Line 62: Line 62:
 
|}
 
|}
  
−
===连接NanoPi M2 / NanoPi 2 Fire===
+
===Connect to NanoPi M2 / NanoPi 2 Fire===
−
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-LED_nanopi_m2.jpg|frameless|600px|Matrix-LED_nanopi_m2]]
 
[[File:Matrix-LED_nanopi_m2.jpg|frameless|600px|Matrix-LED_nanopi_m2]]
  
−
连接说明：
+
Connection Details:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
Line 79: Line 78:
 
|}
 
|}
  
−
===连接NanoPC-T2===
+
===Connect to NanoPC-T2===
−
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-LED_NanoPC-T2.jpg|frameless|600px|Matrix-LED_NanoPC-T2]]
 
[[File:Matrix-LED_NanoPC-T2.jpg|frameless|600px|Matrix-LED_NanoPC-T2]]
  
−
连接说明：
+
Connection Details:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
Line 95: Line 94:
 
|}
 
|}
  
−
==编译运行测试程序==
+
==Compile & Run Test Program==
−
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
Line 109: Line 108:
 
</syntaxhighlight>
 
</syntaxhighlight>
  
−
运行测试程序：
+
Run test program:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
$ matrix-gpio_out
 
$ matrix-gpio_out
 
</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>
−
运行效果如下：<br>
+
Here is what you should observe:<br>
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
1: gpio status change
 
1: gpio status change
Line 122: Line 121:
 
5: gpio status change
 
5: gpio status change
 
</syntaxhighlight>
 
</syntaxhighlight>
−
可以看到LED在不停地闪烁。
+
The LED will be blinking continuously.
  
−
==代码说明==
+
==Code Sample==
−
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_out，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_out". Here is its source code:
 
<syntaxhighlight lang="c">
 
<syntaxhighlight lang="c">
 
int main(int argc, char ** argv)  
 
int main(int argc, char ** argv)  
Line 165: Line 164:
 
}
 
}
 
</syntaxhighlight>
 
</syntaxhighlight>
−
API说明参考维基：[[Matrix API reference manual/zh|Matrix API reference manual]] <br>
+
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==
Line 451: Line 450:
 
* 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-21-2016===
 +
* Re-organized and simplified wiki
  
 
<!--
 
<!--

Latest revision as of 14:36, 21 June 2016

查看中文

1 Introduction

LED
LED
LED

The Matrix-LED is an LED module with three 2.54 mm spacing pins: V(supply voltage),G(ground) and S(signal) which is connected to a triode to turn the LED on or off. You can write high or low, or PWN signals(3.3V or 5V) to S. When you write high to S the LED will turn on and become brightest. When you write low to S the LED will turn off. If you write PWM signals to S the LED's brightness will vary depending on the PWM's signal variances.

2 Features

  • GPIO/PWM interface, 3.3/5V, PWM brightness control
  • Small, easy to be used in various situations
  • 2.54 mm spacing pin
  • PCB Dimension(mm): 8 x 24

LED-01.PCB

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

3 Basic Device Operation

The module has three 2.54 mm spacing pins: V(supply voltage),G(ground) and S(signal) which is connected to a triode to turn the LED on or off. You can write high or low, or PWN signals(3.3V or 5V) to S. When you write high to S the LED will turn on and become brightest. When you write low to S the LED will turn off. If you write PWM signals to S the LED's brightness will vary depending on the PWM's signal variances.

4 Applications

4.1 Connect to NanoPi M1

Refer to the following connection diagram to connect the module to the NanoPi M1:
Matrix-LED_nanopi_m1

Connection Details:

Matrix-LED 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-LED_nanopi_2

Connection Details:

Matrix-LED 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-LED_nanopi_m2

Connection Details:

Matrix-LED 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-LED_NanoPC-T2

Connection Details:

Matrix-LED 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_out

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:

1: gpio status change
2: gpio status change
3: gpio status change
4: gpio status change
5: gpio status change

The LED will be blinking continuously.

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_out". Here is its source code: 

int main(int argc, char ** argv) 
{
    int pin = GPIO_PIN(7); 
    int i, value, board;
    int ret = -1;
 
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    }
    if (board == BOARD_NANOPI_T2)
        pin = GPIO_PIN(15);
 
    if (argc == 2)
        pin = GPIO_PIN(atoi(argv[1]));
    if ((ret = exportGPIOPin(pin)) == -1) {   
        printf("exportGPIOPin(%d) failed\n", pin);
    }
    if ((ret = setGPIODirection(pin, GPIO_OUT)) == -1) {
        printf("setGPIODirection(%d) failed\n", pin);
    }
    for (i = 0; i < STATUS_CHANGE_TIMES; i++) {
        if (i % 2) {
            value = GPIO_HIGH;
        } else {
            value = GPIO_LOW;
        }
        if ((ret = setGPIOValue(pin, value)) > 0) {
            printf("%d: GPIO_PIN(%d) value is %d\n", i+1, pin, value);
        } else {
            printf("setGPIOValue(%d) failed\n", pin);
        }
        sleep(1);
    }
    unexportGPIOPin(pin);
    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-18-2016

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

8.2 June-21-2016

  • Re-organized and simplified wiki


Retrieved from "https://wiki.friendlyelec.com/wiki/index.php?title=Matrix_-_LED&oldid=6151"