Matrix - 2'8 SPI Key TFT

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1 Introduction

• Matrix-2'8_SPI_Key_TFT模块是一款2.8英寸的TFT 触摸LCD，模块采用ST7789S驱动IC和XPT2046电阻式触摸IC，屏幕分辨率为320*240，采用SPI控制接口，模块还包含3个独立按键，可根据需要自定义功能。
• 详细规格如下所示：

LCD尺寸	2.8寸
显示区域	57.6mm*43.2mm
驱动IC	ST7789S
分辨率	320*240（RGB）
接口方式	SPI
工作电压	5V
背光电压	5V
触摸屏类型	电阻式，钢化玻璃触摸屏

模块上电默认打开背光，可通过置低LED_EN引脚关闭背光。如果需要关闭上电打开背光，只需要拿到电路板上的R12电阻，再通过置高LED_EN引脚打开背光；

2 Features

• PCB dimension(mm):

• Pin Description:

Pin	Description	Pin	Description
1	VDD_3.3V	2	VDD_5V
3	NC	4	VDD_5V
5	NC	6	GND
7	LCD_RESET	8	NC
9	GND	10	NC
11	LED_EN	12	NC
13	KEY_1	14	GND
15	KEY_2	16	KEY_3
17	VDD_3.3V	18	T_IRQ
19	SPI_MOSI	20	GND
21	SPI_MISO	22	LCD_D/C
23	SPI_CLK	24	LCD_CS
25	GND	26	T_CS

3 Applications

3.1 Connect to NanoPi M1

Please refer to the following connection diagram to connect the module to the NanoPi M1:

3.2 Connect to NanoPi 2

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

3.3 Connect to NanoPi M2 / NanoPi 2 Fire

Please refer to the following connection diagram to connect the module to the NanoPi M2 / P2:
Matrix-2'8_SPI_Key_TFT_nanopi_m2

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/demo/nanopi-status
./build.sh
./run.sh /dev/fb-st7789s

The nanopi-status is a small Qt utility which can be used to list system's basic information. Here is what you should expect to observe:

6 Update Log

6.1 Feb-24-2016

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