Matrix - 2'8 SPI TFT

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1 Introduction

File:Matrix-SPI TFT.png

2 Features

• PCB dimension(mm):

• Pin Description:

Pin	Description

4 Download Matrix Source Code

All the matrix modules' code samples are open source. They are maintained on GitHub - git://github.com/friendlyarm/matrix.git
Each branch in this hub contains the matrix modules' code samples for a board that the matrix modules can work with。

• The nanopi branch contains the matrix modules' code samples for the NanoPi
• the tiny4412 branch contains the matrix modules' code samples for the Tiny4412
• the raspberrypi branch contains the matrix modules' code samples for the RaspberryPi

Please follow the steps below to get the source code:
Install the git utility on a PC running Ubuntu14.04

$ sudo apt-get install git

Clone the matrix code from GitHub

$ git clone git://github.com/friendlyarm/matrix.git

If this is successful a "matrix" directory will be generated, which will contain all the matrix modules' code samples.

5 Connect to NanoPi

5.1 Preparations

Please install a Debian on a NanoPi and an appropriate cross compiler on a PC. Please refer to wiki:NanoPi
Compile a NanoPi kernel. Note: please use the kernel's source code from the nanopi-v4.1.y-matrix branch.

$ git clone https://github.com/friendlyarm/linux-4.x.y.git
$ cd linux-4.x.y
$ git checkout nanopi-v4.1.y-matrix
$ make nanopi_defconfig
$ touch .scmversion
$ make

5.2 硬件连接

参考下图连接模块Matrix-SPI_TFT和NanoPi
Matrix-SPI_TFT_nanopi

连接说明：

Matrix-SPI_TFT	NanoPi

5.3 加载驱动模块

启动NanoPi，在其Debian的shell终端上加载芯片对应的驱动模块

$ modprobe fbtft_device name=matrix-spi_tft gpios=dc:161,reset:162,cs:163
$ modprobe matrix_ads7846

模块fbtft_device是芯片ili9341的驱动，模块matrix_ads7846是芯片xpt2046的驱动

5.4 安装软件包

在NanoPi的shell终端上安装软件包qtembedded和matrix-tslib

$ apt-get update
$ apt-get install qtembedded
$ apt-get install matrix-tslib

qtembedded是qt相关的库，matrix-tslib则用于触摸屏校准。

5.5 运行测试程序

启动Qt应用程序

$ . /usr/bin/matrix-setqt4env
$ /usr/local/Trolltech/QtEmbedded-4.8.5-arm/examples/tetrix -qws

matrix-setqt4env用于设置环境变量，第一次运行该脚本时，会出现触摸校准的界面，根据提示点击5个点后完成校准。 tetrix是一个qt4编写俄罗斯方块小游戏，点击start按钮后就可以开始娱乐了。