Matrix - Compact Kit

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1 Introduction

• The Matrix-Compact Kit is a compact board with various hardware resources, interfaces and ports. It includes user keys, LED, buzzer, ADC, compass, temperature sensor, IR receiver, TFT port and etc. This board can be connected to the NanoPi, NanoPi 2 and Raspberry Pi via its 40 pin header. In addition you can connect other external modules to its GPIOs.

2 Features

• PCB Dimension(mm):

Matrix-Compact_Kit Layout

• 40pin female connector's GPIO Pin Spec

Pin#	Name	Pin#	Name
1	VDD_SYS_3.3V	2	VDD_5V
3	I2C0_SDA	4	VDD_5V
5	I2C0_SCL	6	DGND
7	GPIOB28	8	UART3_TXD
9	DGND	10	UART3_RXD
11	GPIOB29	12	GPIOB26
13	GPIOB30	14	DGND
15	GPIOB31	16	PWM2
17	VDD_SYS_3.3V	18	GPIOB27
19	SPI0_MOSI	20	DGND
21	SPI0_MISO	22	PWM0
23	SPI0_CLK	24	SPI0_CS
25	DGND	26	PWM1
27	I2C1_SDA	28	I2C1_SCL
29	GPIOC8	30	DGND
31	SPI2_CLK	32	GPIOC28
33	SPI2_CS	34	DGND
35	SPI2_MOSI	36	GPIOC7
37	SPI2_MISO	38	ALIVEGPIO2
39	DGND	40	ALIVEGPIO3

Matrix-Compact_Kit Layout

• 30pin Pin Spec

Pin#	Name	Pin#	Name	Pin#	Name
1	GND	2	VDD_5V	3	A1_PCF
4	GND	5	VDD_5V	6	A2_PCF
7	GND	8	VDD_5V	9	A3_PCF
10	GND	11	VDD_5V	12	D1_Pi11
13	GND	14	VDD_5V	15	D2_Pi26
16	GND	17	VDD_5V	18	D3_Pi16
19	GND	20	VDD_5V	21	D4_Pi19
22	GND	23	VDD_5V	24	D5_Pi21
25	GND	26	VDD_5V	27	D6_Pi23
28	GND	29	VDD_5V	30	D7_Pi24

18B20 & IR Receiver Layout

• 18B20 & IR Receiver Pin Spec

Module	Pin#	Name	Pin#	Name	Pin#	Name
18B20	1	VDD_5V	2	DATA	3	GND
IR Receiver	1	DATA	2	GND	3	VDD_5V

3 Applications

3.1 Connect to NanoPi 2

Please refer to the following connection diagram to connect the module to the NanoPi 2:

4 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-compact_kit

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:

LED blinking 1
LED blinking 2
Button:  1 1 1
ADC channel0: 550
Compass angle: 328.5
Pwm start
Pwm stop

Run Qt program to test the TFT LCD:

cd matrix/demo/nanopi-status
./build.sh
./run.sh /dev/fb-st7735s

程序会显示出系统的基本信息，效果如下：

5 代码说明

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-compact_kit，内容如下:

int main(int argc, char ** argv)
{
    int board;
 
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    }
    testLED(board);
    readButton();
    readADC();
    readCompass();
    testPWM(board);
    // readTemp();
    // testIR();
 
    return 0;
}

API说明参考维基：Matrix API reference manual

6 通过Python控制

使用的Python版本为2.7.9。
克隆Matrix配件Python相关的库之前，需要先确保你的板可正常上网，并且已经安装好git；接着执行以下步骤安装Python相关的库文件

$ apt-get install Python-dev libi2c-dev

在开发板Debian系统上克隆matrix-python仓库：

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

克隆完成后会得到一个名为matrix-python的目录。

控制LED：

$ cd matrix-python/Matrix.GPIO
$ python setup.py install
$ python test/matrix_output.py 33

可以看到红色LED闪烁了一下。

读按键KEY1：

$ cd matrix-python/Matrix.GPIO
$ python setup.py install
$ python test/matrix_input.py 36

当KEY1按下时value=0，KEY1弹起时value=1。

测试AD转换：

$ cd matrix-python/modules
$ modprobe pcf8591
$ cd ../Matrix.pcf8591
$ python setup.py install
$ python test/matrix_adc.py

通过旋转可调电阻可以改变AD转换值。

测试指南针：

$ cd matrix-python/Matrix.I2C
$ python setup.py install
$ python test/matrix_compass.py

通过改变开发板的朝向可以获得不同的方向值。

7 Resources

• [Schematic](Matrix - Compact Kit-Schematic.pdf)
• [Schematic](Matrix - Compact Kit-Schematic.pdf)
• [0.9'LCD datasheet](Matrix - Compact Kit-0.9'LCD datasheet.pdf)

8 Update Log

8.1 Feb-17-2016

• Added 5.9, 5.10 and 5.11

8.2 Feb-24-2016

• Added the driver's source code location in Section 5.2

8.3 Mar-21-2016

• Corrected typo in Section 5.9
• Added lib installation steps in Section 5.11

8.4 Mar-29-2016

• Corrected expression errors