Matrix - LCD2USB

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1 Introduction

LCD2USB
  • The Matrix-LCD2USB module is a simple and easy to use LCD module. It converts a parallel port to a USB port.
  • It works with LCD4LINUX, LCD Smartie and LCDProc. There are plenty of open source code samples available on the internet.
  • It works with various LCDs: 2 * 16, 2 * 20, 4 * 20, 4 * 27, 4 * 40 and etc.
  • It has two function keys which can be configured by users.

2 Features

  • Micro USB interface
  • Supports LCD4LINUX, LCD Smartie, LCDProc。
  • Supports various LCD modules
  • 2 x User key
  • PCB dimension(mm): 24 x 42。

LCD2USB-01.PCB

3 Basic Device Operation

An LCD module usually communicates via a parallel interface which needs multiple IO resources. This module uses the AX2210 MCU which converts signals to commands and transmit to an LCD.

4 Applications

4.1 Connect to NanoPi M1

Refer to the following connection diagram to connect the module to the NanoPi M1:
Matrix-LCD2USB_nanopi_m1

4.2 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-LCD2USB_nanopi_m2

4.3 Connect to NanoPC-T2

Refer to the following connection diagram to connect the module to the NanoPC-T2:
Matrix-LCD2USB_NanoPC-T2

5 Applications

Note: 注意:模块上电后LCD液晶会显示LCD2USB V1.09,如果没有显示,请旋转模块背面的电位器调节屏幕显示的灰度。

5.1 在Ubuntu系统使用lcd4linux

(1)安装lcd4linux

$ sudo apt-get install lcd4linux

(2)连接模块,并查看模块使用的USB端口,本例中使用的端口为usbdev3.2

$ ls /dev/usb*

(3)更改/etc下的配置文件。软件生成的lcd4linux.conf文件较长,新手不容易配置,可重命名或删除后自己新建,并复制下面的配置代码。

$ cd /etc
$ sudo vi lcd4linux.conf

输入以下配置信息,并保存。

Display LCD2USB {
    Driver     'LCD2USB'          #模块的类型为LCD2USB
    Size       '16x2'             #LCD液晶的尺寸为1602
    Port       '/dev/usbdev3.2'   #使用的端口为/dev/usbdev3.2
}
 
Widget IPaddress {
    class  'Text'                      #类型:Text
    expression netinfo::ipaddr('eth0') #获取eth0的ip地址
    prefix 'IP:'                       #在行初显示“IP:”
    width 16 			       #显示宽度:16
    align  'C'                         #显示方式:居中
    update 1000                        
}
 
Widget Time { 
    class 'Text' 
    expression strftime('%a %H:%M:%S',time()) 
    width 16 
    align 'C' 
    update 1000 
}
 
Layout Default {
    Row1 {
        Col1 'IPaddress'               #在第一行第一列显示Widget IPaddress 
    }
    Row2 {
        Col1 'Time'	              #在第二行第一列显示Widget Time 
    }
 
}
 
Display 'LCD2USB'
Layout  'Default'

详情配置信息请参考lcd4linux网站:https://lcd4linux.bulix.org

(4)更改lcd4linux.conf文件权限

$ sudo chmod 600 lcd4linux.conf
$ chown root.root lcd4linux.conf

(5)运行lcd4linux

$ lcd4linux

LCD液晶显示信息如下:

LCD2USBdisplay-01 LCD2USBdisplay-2004

5.2 Windows系统使用LCDSmartie

1、模块连接PC的USB口,并安装lcd2usbdriver驱动,LCD2USB提供的驱动下载地址:http://www.harbaum.org/till/lcd2usb/LCD2USB.dll。

2、运行LCDSmartie,软件源码地址:http://lcdsmartie.sourceforge.net/

3、软件界面如下:

LCD2USBdisplay-02

4、点击Setup可进去设置页面,配置模块和显示的内容。

LCD2USBdisplay-03

LCD液晶显示信息如下:

LCD2USBdisplay-04 LCD2USBdisplay-05

6 Resources

xxx.pdf