LCD module in OpenWrt

My graduation project comes back to my memory, how long ago it was... It seemed to be a difficult task to write a code for atmega8 in AVR Studio on the assembler. There were a lot of happiness when I got on the display the legendary «HelloWorld!». Let’s check how much efforts we should make to complete a similar task. Let’s try to connect a two-lines LCD display to our router.

I liked the project LCD2USB — connecting of LCD display to the computer per USB (http://www.harbaum.org/till/lcd2usb/index.shtml). It’s an amazingly simple hardware implementation and availability of firmware. All the more there is a support from LCD4Linux for LCD2USB in Linux (http://ssl.bulix.org/projects/lcd4linux/) - it is a small utility which gets the information from the kernel, applications and which displays the information on the external LCD display.

Let’s pass the stage of board production and let’s begin from there: So, the board is ready, let’s put it into action.

On the stage of configuration OpenWrt the following modules are to be selected:
Utilities:
<M> lcd4linux
<*> LCD2USB
Base system:
<*> busybox:
Linux System Utilities:
<*> lsusb

Let’s build also a test program from the directory lcd2usb/testapp using cross-compiler. Let’s add for this the following lines in makefile:

CC = [..]staging_dir/toolchain-mipsel_gcc-4.3.3+cs_uClibc-0.9.31/bin/mipsel-openwrt-linux-gcc
INCLUDE_PATH = [..]staging_dir/target-mipsel_uClibc-0.9.31/usr/include
LIB_PATH = [..]/staging_dir/target-mipsel_uClibc-0.9.31/usr/lib

$(APP): $(APP).c
$(CC) -Wall -I$(INCLUDE_PATH) -L$(LIB_PATH) -o $@ $(APP).c -lusb

As a result we get the program named lcd2usb. Let’s copy it into /home/testapp/.

Let’s install the packages:

root@OpenWrt:/# opkg install lcd4linux
Installing lcd4linux (r1116-2) to root...
Downloading ftp://ftp:ftp@192.168.0.9/lcd4linux_r1116-2_brcm47xx.ipk.
Installing libusb (0.1.12-2) to root...
Downloading ftp://ftp:ftp@192.168.0.9/libusb_0.1.12-2_brcm47xx.ipk.
Configuring libusb.
Configuring lcd4linux.

Let’s connect the LCD display. On the display there should be the inscription LCD2USB V1.09 like this:

Let’s check the response of Linux to the new device. Let’s check the output dmesg:

root@OpenWrt:/# dmesg
usb 1-1.4: new low speed USB device using ohci_hcd and address 4

Let’s also check the output lsusb:

root@OpenWrt:/# lsusb
Bus 001 Device 001: ID 1d6b:0001
Bus 002 Device 001: ID 1d6b:0002
Bus 001 Device 002: ID 0a05:7211
Bus 001 Device 003: ID 0951:1603
Bus 001 Device 004: ID 0403:c630

Presence of the device with ID 0403:c630 in this list signifies that the kernel has recognized our LCD display as a device LCD2USB.

Let’s start the test program:

root@OpenWrt:/# /home/testapp/lcd2usb
-- LCD2USB test application --
-- (c) 2006 by Till Harbaum --
-- http://www.harbaum.org/till/lcd2usb --
Found LCD2USB device on bus 001 device 006.
Echo test successful!
Firmware version 1.9
Installed controllers: CTRL0
Keys: 0:off 1:off

On the display screen there will be a «crawler» message with the text: «The quick brown fox jumps over the lazy dogs back ...»
It will look like this:

Let’s try to start lcd4linux in the debugging mode:

root@OpenWrt:/# lcd4linux -Fvv
LCD4Linux 0.11.0-SVN-1092 starting
Dump of /etc/lcd4linux.conf:
Display 'picoLCD'
Display:BA63.BarChar 219
Display:BA63.Driver 'WincorNixdorf'
Display:BA63.Model 'BA63'
Display:BA63.Port '/dev/tts/0'
Display:BA63.SelfTest 0
Display:BA63.Speed 9600
Display:BWCT.asc255bug 1
Display:BWCT.Contrast 220
Display:BWCT.Driver 'BWCT'
Display:BWCT.Icons 1
Display:BWCT.Size '20x4'
Display:CF631.Backlight 50
Display:CF631.Contrast 95
Display:CF631.Driver 'Crystalfontz'
Display:CF631.Icons 1
Display:CF631.Model '631'
Display:CF631.Port '/dev/tts/USB0'
Display:CF631.Speed 115200
Display:CF632.Driver 'Crystalfontz'
Display:CF632.Icons 1
Display:CF632.Model '632'
Display:CF632.Port '/dev/tts/0'
Display:CF632.Speed 19200
Display:CF633.Backlight 50
Display:CF633.Contrast 16
Display:CF633.Driver 'Crystalfontz'
Display:CF633.Icons 1
Display:CF633.Model '633'
Display:CF633.Port '/dev/tts/0'
Display:CF633.Speed 19200
Display:CF635.Backlight 128
Display:CF635.Contrast 100
Display:CF635.Driver 'Crystalfontz'
Display:CF635.Icons 1
Display:CF635.Model '635'
Display:CF635.Port '/dev/ttyUSB0'
Display:CF635.Speed 115200
Display:CT20x4.Driver 'Beckmann+Egle'
Display:CT20x4.Icons 1
Display:CT20x4.Model 'CT20x4'
Display:CT20x4.Port '/dev/tts/0'
Display:ctinclud.Driver 'serdisplib'
Display:ctinclud.Inverted 0
Display:ctinclud.Model 'CTINCLUD'
Display:ctinclud.Options ''
Display:ctinclud.Port 'USB:7c0/1501'
Display:Curses.Driver 'Curses'
Display:Curses.Size '20x6'
Display:CW12232.Brightness 2
Display:CW12232.Driver 'Cwlinux'
Display:CW12232.Icons 1
Display:CW12232.Model 'CW12232'
Display:CW12232.Port '/dev/usb/tts/0'
Display:CW12232.Speed 19200
Display:G15.Contrast 10
Display:G15.Driver 'G-15'
Display:G15.Font '6x8'
Display:G15.Inverted 0
Display:G15.SingleKeyPress 1
Display:G15.UInput '/dev/input/uinput'
Display:HD44780-4bit.asc255bug 0
Display:HD44780-4bit.Bits 4
Display:HD44780-4bit.Driver 'HD44780'
Display:HD44780-4bit.Model 'generic'
Display:HD44780-4bit.Port '/dev/parports/0'
Display:HD44780-4bit.Size '16x1'
Display:HD44780-4bit.UseBusy 0
Display:HD44780-4bit.Wire.ENABLE 'DB6'
Display:HD44780-4bit.Wire.GPO 'GND'
Display:HD44780-4bit.Wire.RS 'DB4'
Display:HD44780-4bit.Wire.RW 'GND'
Display:HD44780-generic.asc255bug 0
Display:HD44780-generic.Driver 'HD44780'
Display:HD44780-generic.GPOs 8
Display:HD44780-generic.Model 'generic'
Display:HD44780-generic.Port '/dev/parports/0'
Display:HD44780-generic.Size '8x2'
Display:HD44780-generic.Wire.ENABLE 'STROBE'
Display:HD44780-generic.Wire.ENABLE2 'GND'
Display:HD44780-generic.Wire.GPO 'INIT'
Display:HD44780-generic.Wire.POWER 'GND'
Display:HD44780-generic.Wire.RS 'AUTOFD'
Display:HD44780-generic.Wire.RW 'GND'
Display:HD44780-I2C.asc255bug 0
Display:HD44780-I2C.Bits '4'
Display:HD44780-I2C.Bus 'i2c'
Display:HD44780-I2C.Device '70'
Display:HD44780-I2C.Driver 'HD44780'
Display:HD44780-I2C.Icons 1
Display:HD44780-I2C.Model 'generic'
Display:HD44780-I2C.Port '/dev/i2c-0'
Display:HD44780-I2C.Size '20x4'
Display:HD44780-I2C.Wire.ENABLE 'DB6'
Display:HD44780-I2C.Wire.GPO 'GND'
Display:HD44780-I2C.Wire.RS 'DB4'
Display:HD44780-I2C.Wire.RW 'DB5'
Display:HD44780-kernelconcepts.Driver 'HD44780'
Display:HD44780-kernelconcepts.Model 'HD66712'
Display:HD44780-kernelconcepts.Port '/dev/parports/0'
Display:HD44780-kernelconcepts.Size '20x4'
Display:HD44780-kernelconcepts.UseBusy 1
Display:HD44780-kernelconcepts.Wire.ENABLE 'STROBE'
Display:HD44780-kernelconcepts.Wire.ENABLE2 'GND'
Display:HD44780-kernelconcepts.Wire.GPO 'GND'
Display:HD44780-kernelconcepts.Wire.POWER 'GND'
Display:HD44780-kernelconcepts.Wire.RS 'INIT'
Display:HD44780-kernelconcepts.Wire.RW 'AUTOFD'
Display:HD44780-winamp.asc255bug 1
Display:HD44780-winamp.Driver 'HD44780'
Display:HD44780-winamp.Model 'generic'
Display:HD44780-winamp.Port '/dev/parports/0'
Display:HD44780-winamp.Size '20x4'
Display:HD44780-winamp.Timing.AH 20
Display:HD44780-winamp.Timing.AS 140
Display:HD44780-winamp.Timing.CLEAR 2250
Display:HD44780-winamp.Timing.CY 1000
Display:HD44780-winamp.Timing.EXEC 80
Display:HD44780-winamp.Timing.fuzz 100
Display:HD44780-winamp.Timing.GPO_PW 230
Display:HD44780-winamp.Timing.GPO_ST 20
Display:HD44780-winamp.Timing.HOME 2250
Display:HD44780-winamp.Timing.INIT1 4100
Display:HD44780-winamp.Timing.INIT2 100
Display:HD44780-winamp.Timing.ONOFF 2250
Display:HD44780-winamp.Timing.POWER 500
Display:HD44780-winamp.Timing.PW 450
Display:HD44780-winamp.Timing.WRCG 120
Display:HD44780-winamp.UseBusy 1
Display:HD44780-winamp.Wire.ENABLE 'STROBE'
Display:HD44780-winamp.Wire.ENABLE2 'GND'
Display:HD44780-winamp.Wire.GPO 'GND'
Display:HD44780-winamp.Wire.POWER 'GND'
Display:HD44780-winamp.Wire.RS 'INIT'
Display:HD44780-winamp.Wire.RW 'AUTOFD'
Display:Image.Background '00000022'
Display:Image.Basecolor '80d000'
Display:Image.Border 20
Display:Image.Driver 'Image'
Display:Image.Font '6x8'
Display:Image.Foreground '000000cc'
Display:Image.Format 'PNG'
Display:Image.Gap '-1x-1'
Display:Image.Pixel '4+1'
Display:Image.Size '120x32'
Display:LCD-Linux.Driver 'LCD-Linux'
Display:LCD-Linux.Size '20x2'
Display:LCD-Linux.UseBusy 0
Display:LCD2041.Contrast 160
Display:LCD2041.Driver 'MatrixOrbital'
Display:LCD2041.Model 'LCD2041'
Display:LCD2041.Port '/dev/tts/0'
Display:LCD2041.Speed 19200
Display:LCD2USB.Backlight 1
Display:LCD2USB.Driver 'LCD2USB'
Display:LCD2USB.Icons 1
Display:LCD2USB.Size '20x2'
Display:LCDTerm.Driver 'LCDTerm
Display:LCDTerm.Icons 1
Display:LCDTerm.Port '/dev/tts/0'
Display:LCDTerm.Size '20x4'
Display:LCDTerm.Speed 19200
Display:LCM-162.asc255bug 0
Display:LCM-162.Driver 'HD44780'
Display:LCM-162.Icons 1
Display:LCM-162.Model 'LCM-162'
Display:LCM-162.Port '/dev/parports/0'
Display:LCM-162.Size '16x2'
Display:LCM-162.UseBusy 1
Display:LK202.Contrast 256/2
Display:LK202.Driver 'MatrixOrbital'
Display:LK202.Model 'LK202-24-USB'
Display:LK202.Port '/dev/tts/USB0'
Display:LK202.Speed 19200
Display:LK204.Contrast 256/2
Display:LK204.Driver 'MatrixOrbital'
Display:LK204.Model 'LK204-24-USB'
Display:LK204.Port '/dev/usb/tts/0'
Display:LK204.Speed 19200
Display:LPH7508-serdisplib.Driver 'serdisplib'
Display:LPH7508-serdisplib.Model 'LPH7508'
Display:LPH7508-serdisplib.Port 'PAR:/dev/parports/0'
Display:LPH7508.Contrast 15
Display:LPH7508.Driver 'LPH7508'
Display:LPH7508.Font '6x8'
Display:LPH7508.Inverted 0
Display:LPH7508.Port '/dev/parports/0'
Display:M50530-24x8.Driver 'M50530'
Display:M50530-24x8.Duty 2
Display:M50530-24x8.Font '5x7'
Display:M50530-24x8.Port '/dev/parports/0'
Display:M50530-24x8.Size '24x8'
Display:M50530-24x8.Timing.fuzz 100
Display:M50530-24x8.UseBusy 1
Display:M50530-24x8.Wire.EX 'STROBE'
Display:M50530-24x8.Wire.GPO 'GND'
Display:M50530-24x8.Wire.IOC1 'SLCTIN'
Display:M50530-24x8.Wire.IOC2 'AUTOFD'
Display:M50530-24x8.Wire.RW 'INIT'
Display:MI240.Driver 'MilfordInstruments'
Display:MI240.Model 'MI240'
Display:MI240.Port '/dev/tts/0'
Display:MI240.Speed 19200
Display:picoLCD.Backlight 1
Display:picoLCD.Contrast 0
Display:picoLCD.Driver 'picoLCD'
Display:picoLCD.Icons 1
Display:picoLCD.Size '20x2'
Display:SC1602D.asc255bug 0
Display:SC1602D.Bits '8'
Display:SC1602D.Driver 'HD44780'
Display:SC1602D.Icons 1
Display:SC1602D.Port '/dev/parports/0'
Display:SC1602D.Size '16x2'
Display:SC1602D.Wire.ENABLE 'STROBE'
Display:SC1602D.Wire.GPO 'INIT'
Display:SC1602D.Wire.POWER 'GND'
Display:SC1602D.Wire.RS 'AUTOFD'
Display:SC1602D.Wire.RW 'GND'
Display:SerDispLib.Driver 'serdisplib'
Display:SerDispLib.Model 'OPTREX323'
Display:SerDispLib.Options ''
Display:SerDispLib.Port 'PAR:/dev/parports/0'
Display:SimpleLCD.Driver 'SimpleLCD'
Display:SimpleLCD.Options 0
Display:SimpleLCD.Port '/dev/tts/0'
Display:SimpleLCD.Size '20x2'
Display:SimpleLCD.Speed 1200
Display:T6963-240x128.Cell 6
Display:T6963-240x128.Driver 'T6963'
Display:T6963-240x128.DualScan 0
Display:T6963-240x128.Font '6x8'
Display:T6963-240x128.Port '/dev/parports/0'
Display:T6963-240x128.Size '240x128'
Display:T6963-240x128.Timing.fuzz 120
Display:T6963-240x128.Wire.CD 'SLCTIN'
Display:T6963-240x128.Wire.CE 'STROBE'
Display:T6963-240x128.Wire.RD 'AUTOFD'
Display:T6963-240x128.Wire.WR 'INIT'
Display:T6963-240x128D.Cell 6
Display:T6963-240x128D.Driver 'T6963'
Display:T6963-240x128D.DualScan 1
Display:T6963-240x128D.Font '6x8'
Display:T6963-240x128D.Port '/dev/parports/0'
Display:T6963-240x128D.Size '240x128'
Display:T6963-240x128D.Timing.fuzz 120
Display:T6963-240x128D.Wire.CD 'SLCTIN'
Display:T6963-240x128D.Wire.CE 'STROBE'
Display:T6963-240x128D.Wire.RD 'AUTOFD'
Display:T6963-240x128D.Wire.WR 'INIT'
Display:T6963-240x64.Cell 6
Display:T6963-240x64.Driver 'T6963'
Display:T6963-240x64.DualScan 0
Display:T6963-240x64.Font '6x8'
Display:T6963-240x64.Port '/dev/parports/0'
Display:T6963-240x64.Size '240x64'
Display:T6963-240x64.Timing.fuzz 120
Display:T6963-240x64.Wire.CD 'SLCTIN'
Display:T6963-240x64.Wire.CE 'STROBE'
Display:T6963-240x64.Wire.RD 'AUTOFD'
Display:T6963-240x64.Wire.WR 'INIT'
Display:Trefon.Backlight 1
Display:Trefon.Driver 'TREFON'
Display:Trefon.Icons 1
Display:Trefon.Size '16x2'
Display:USBLCD.asc255bug 1
Display:USBLCD.Driver 'USBLCD'
Display:USBLCD.Icons 1
Display:USBLCD.Port 'libusb'
Display:USBLCD.Size '20x4'
Display:WDC2704M.Controllers 2
Display:WDC2704M.Driver 'HD44780'
Display:WDC2704M.Model 'generic'
Display:WDC2704M.Port '/dev/parports/0'
Display:WDC2704M.Size '27x4'
Display:WDC2704M.UseBusy 1
Display:WDC2704M.Wire.ENABLE 'STROBE'
Display:WDC2704M.Wire.ENABLE2 'SLCTIN'
Display:WDC2704M.Wire.GPO 'GND'
Display:WDC2704M.Wire.POWER 'GND'
Display:WDC2704M.Wire.RS 'INIT'
Display:WDC2704M.Wire.RW 'AUTOFD'
Display:XWindow.Background '00000022'
Display:XWindow.Basecolor '80d000'
Display:XWindow.Border 20
Display:XWindow.Driver 'X11'
Display:XWindow.Font '5x8'
Display:XWindow.Foreground '000000cc'
Display:XWindow.Gap '-1x-1'
Display:XWindow.Pixel '4+1'
Display:XWindow.Size '120x32'
Layout 'L20x2'
Layout:Debug.Row09.Col1 'Heartbeat'
Layout:Default.Row1.Col1 'OS'
Layout:Default.Row2.Col1 'CPU'
Layout:Default.Row2.Col10 'RAM'
Layout:Default.Row3.Col1 'Busy'
Layout:Default.Row3.Col10 'Rain'
Layout:Default.Row3.Col11 'BusyBar'
Layout:Default.Row4.Col1 'Load'
Layout:Default.Row4.Col11 'LoadBar'
Layout:Default.Row5.Col1 'Disk'
Layout:Default.Row5.Col11 'DiskBar'
Layout:Default.Row6.Col1 'Eth0'
Layout:Default.Row6.Col11 'Eth0Bar'
Layout:L16x1.Row1.Col1 'Busy'
Layout:L16x1.Row1.Col11 'BusyBar'
Layout:L16x2.Row1.Col1 'Busy'
Layout:L16x2.Row1.Col11 'BusyBar'
Layout:L16x2.Row2.Col1 'Disk'
Layout:L16x2.Row2.Col11 'BarTest'
Layout:L20x2.Row1.Col1 'CPUinfo'
Layout:L20x2.Row2.Col1 'Busy'
Layout:L20x2.Row2.Col11 'BusyBar'
Layout:L24x8.Row1.Col1 'Load'
Layout:L24x8.Row1.Col11 'BusyBar'
Layout:L40x2.Row1.Col1 'OS'
Layout:L40x2.Row1.Col21 'Busy'
Layout:L40x2.Row1.Col31 'BusyBar'
Layout:L40x2.Row2.Col1 'CPU'
Layout:L40x2.Row2.Col10 'RAM'
Layout:L40x2.Row2.Col21 'Load'
Layout:L40x2.Row2.Col31 'LoadBar'
Layout:L8x2.Row1.Col1 'Busy'
Layout:L8x2.Row2.Col1 'BarTest'
Layout:Test.Row01.Col1 'Test1'
Layout:Test.Row02.Col1 'Test1'
Layout:Test.Row03.Col1 'Test1'
Layout:Test.Row04.Col1 'Test1'
Layout:Test.Row05.Col1 'Test1'
Layout:Test.Row06.Col1 'Test1'
Layout:Test.Row07.Col1 'Test1'
Layout:Test.Row08.Col1 'Test1'
Layout:Test.Row09.Col1 'Test1'
Layout:Test.Row10.Col1 'Test1'
Layout:Test.Row11.Col1 'Test1'
Layout:Test.Row12.Col1 'Test1'
Layout:Test.Row13.Col1 'Test1'
Layout:Test.Row14.Col1 'Test1'
Layout:Test.Row15.Col1 'Test1'
Layout:Test.Row16.Col1 'Test1'
Layout:Test.Row17.Col1 'Test1'
Layout:Test.Row18.Col1 'Test1'
Layout:Test.Row19.Col1 'Test1'
Layout:Test.Row20.Col1 'Test1'
Layout:Test.Row21.Col1 'Test1'
Layout:Test.Row22.Col1 'Test1'
Layout:Test.Row23.Col1 'Test1'
Layout:Test.Row24.Col1 'Test1'
Layout:Test2.Row01.Col1 'Test1'
Layout:Test2.Row02.Col1 'Test2'
Layout:Test2.Row03.Col1 'Test1'
Layout:Test2.Row04.Col1 'Test2'
Layout:Test2.Row05.Col1 'Test1'
Layout:Test2.Row06.Col1 'Test2'
Layout:Test2.Row07.Col1 'Test1'
Layout:Test2.Row08.Col1 'Test2'
Layout:TestGPO.GPO1 'GPO_Test255'
Layout:TestGPO.GPO4 'GPO_Test1'
Layout:TestGPO.Row1.Col1 'GPO_Val1'
Layout:TestGPO.Row1.Col10 'GPI_Val1'
Layout:TestGPO.Row2.Col1 'GPO_Val4'
Layout:TestIcons.Row1.Col1 'Timer'
Layout:TestIcons.Row1.Col2 'Rain'
Layout:TestIcons.Row1.Col3 'Squirrel'
Layout:TestIcons.Row1.Col4 'Wave'
Layout:TestIcons.Row1.Col5 'Blob'
Layout:TestIcons.Row1.Col6 'Heart'
Layout:TestIcons.Row1.Col7 'Karo'
Layout:TestIcons.Row1.Col8 'EKG'
Layout:TestImage.Layer:2.X1.Y1 'ImageTest'
Layout:TestLayer.Layer:2.X1.Y1 'ImageTest'
Layout:TestLayer.Row1.Col1 'OS'
Layout:TestLayer.Row2.Col1 'CPU'
Layout:TestLayer.Row2.Col10 'RAM'
Layout:TestLayer.Row3.Col1 'Busy'
Layout:TestLayer.Row3.Col10 'Rain'
Layout:TestLayer.Row3.Col11 'BusyBar'
Layout:TestLayer.Row4.Col1 'Load'
Layout:TestLayer.Row4.Col11 'LoadBar'
Layout:TestLayer.Row5.Col1 'Disk'
Layout:TestLayer.Row5.Col11 'DiskBar'
Layout:TestLayer.Row6.Col1 'Eth0'
Layout:TestLayer.Row6.Col11 'Eth0Bar'
Layout:testMySQL.Row1.Col1 'MySQLtest1'
Layout:testMySQL.Row2.Col1 'MySQLtest2'
Plugin:MySQL.database 'lcd4linux'
Plugin:MySQL.password 'lcd4linux'
Plugin:MySQL.port 3306
Plugin:MySQL.server 'gsmlandia.com'
Plugin:MySQL.user 'lcd4linux'
Plugin:Pop3.password1 'secret'
Plugin:Pop3.port1 110
Plugin:Pop3.server1 'localhost'
Plugin:Pop3.user1 'michael'
Plugin:Seti.Directory '/root/setiathome-3.08.i686-pc-linux-gnu'
Variables.minute 60000
Variables.tack 100
Variables.tick 500
Widget:BarTest.class 'Bar'
Widget:BarTest.direction 'E'
Widget:BarTest.expression test::bar(0,30,25,1)
Widget:BarTest.expression2 test::bar(1,30,0,1)
Widget:BarTest.length 8
Widget:BarTest.update 10
Widget:BarTestVal.class 'Text'
Widget:BarTestVal.expression test::bar(0,100,50,0)
Widget:BarTestVal.prefix 'Test '
Widget:BarTestVal.update 200
Widget:BarTestVal.width 9
Widget:Blob.Bitmap.Row1 '.....|.....|.....'
Widget:Blob.Bitmap.Row2 '.....|.....|.***.'
Widget:Blob.Bitmap.Row3 '.....|.***.|*...*'
Widget:Blob.Bitmap.Row4 '..*..|.*.*.|*...*'
Widget:Blob.Bitmap.Row5 '.....|.***.|*...*'
Widget:Blob.Bitmap.Row6 '.....|.....|.***.'
Widget:Blob.Bitmap.Row7 '.....|.....|.....'
Widget:Blob.Bitmap.Row8 '.....|.....|.....'
Widget:Blob.class 'Icon'
Widget:Blob.speed 250
Widget:Busy.align 'R'
Widget:Busy.class 'Text'
Widget:Busy.expression proc_stat::cpu('busy', 500)
Widget:Busy.postfix '%'
Widget:Busy.precision 1
Widget:Busy.prefix 'Busy'
Widget:Busy.update tick
Widget:Busy.width 9
Widget:BusyBar.class 'Bar'
Widget:BusyBar.direction 'E'
Widget:BusyBar.expression proc_stat::cpu('busy', 500)
Widget:BusyBar.expression2 proc_stat::cpu('system', 500)
Widget:BusyBar.length 10
Widget:BusyBar.update tack
Widget:CPU.align 'L'
Widget:CPU.class 'Text'
Widget:CPU.expression uname('machine')
Widget:CPU.prefix 'CPU '
Widget:CPU.style test::onoff(7)>0?'bold':'norm'
Widget:CPU.update tick
Widget:CPU.width 9
Widget:CPUinfo.align 'M'
Widget:CPUinfo.class 'Text'
Widget:CPUinfo.expression cpuinfo('model name')
Widget:CPUinfo.prefix ''
Widget:CPUinfo.speed 100
Widget:CPUinfo.update tick
Widget:CPUinfo.width 20
Widget:Disk.align 'R'
Widget:Disk.class 'Text'
Widget:Disk.expression diskstats('hd.', 'read_sectors', 500) + diskstats('hd.', 'write_sectors', 500)
Widget:Disk.postfix ' '
Widget:Disk.precision 0
Widget:Disk.prefix 'disk'
Widget:Disk.update tick
Widget:Disk.width 10
Widget:DiskBar.class 'Bar'
Widget:DiskBar.direction 'E'
Widget:DiskBar.expression diskstats('hd.', 'read_sectors', 500)
Widget:DiskBar.expression2 diskstats('hd.', 'write_sectors', 500)
Widget:DiskBar.length 14
Widget:DiskBar.update tack
Widget:EKG.Bitmap.Row1 '.....|.....|.....|.....|.....|.....|.....|.....'
Widget:EKG.Bitmap.Row2 '.....|....*|...*.|..*..|.*...|*....|.....|.....'
Widget:EKG.Bitmap.Row3 '.....|....*|...*.|..*..|.*...|*....|.....|.....'
Widget:EKG.Bitmap.Row4 '.....|....*|...**|..**.|.**..|**...|*....|.....'
Widget:EKG.Bitmap.Row5 '.....|....*|...**|..**.|.**..|**...|*....|.....'
Widget:EKG.Bitmap.Row6 '.....|....*|...*.|..*.*|.*.*.|*.*..|.*...|*....'
Widget:EKG.Bitmap.Row7 '*****|*****|****.|***..|**..*|*..**|..***|.****'
Widget:EKG.Bitmap.Row8 '.....|.....|.....|.....|.....|.....|.....|.....'
Widget:EKG.class 'Icon'
Widget:EKG.speed 50
Widget:Eth0.align 'R'
Widget:Eth0.class 'Text'
Widget:Eth0.expression (netdev('eth0', 'Rx_bytes', 500)+netdev('eth0', 'Tx_bytes', 500))/1024
Widget:Eth0.postfix ' '
Widget:Eth0.precision 0
Widget:Eth0.prefix 'eth0'
Widget:Eth0.update tick
Widget:Eth0.width 10
Widget:Eth0Bar.class 'Bar'
Widget:Eth0Bar.direction 'E'
Widget:Eth0Bar.expression netdev('eth0', 'Rx_bytes', 500)
Widget:Eth0Bar.expression2 netdev('eth0', 'Tx_bytes', 500)
Widget:Eth0Bar.length 14
Widget:Eth0Bar.update tack
Widget:GPI_Val1.align 'R'
Widget:GPI_Val1.class 'Text'
Widget:GPI_Val1.expression LCD::GPI(1)
Widget:GPI_Val1.precision 0
Widget:GPI_Val1.prefix 'GPI#1'
Widget:GPI_Val1.update tick
Widget:GPI_Val1.width 10
Widget:GPO_Test1.class 'GPO'
Widget:GPO_Test1.expression 255*test::onoff(1)
Widget:GPO_Test1.update 300
Widget:GPO_Test255.class 'GPO'
Widget:GPO_Test255.expression test::bar(0,255, 0, 1)
Widget:GPO_Test255.update 100
Widget:GPO_Val1.align 'R'
Widget:GPO_Val1.class 'Text'
Widget:GPO_Val1.expression LCD::GPO(1)
Widget:GPO_Val1.precision 0
Widget:GPO_Val1.prefix 'GPO#1'
Widget:GPO_Val1.update tick
Widget:GPO_Val1.width 10
Widget:GPO_Val4.align 'R'
Widget:GPO_Val4.class 'Text'
Widget:GPO_Val4.expression LCD::GPO(4)
Widget:GPO_Val4.precision 0
Widget:GPO_Val4.prefix 'GPO#4'
Widget:GPO_Val4.update tick
Widget:GPO_Val4.width 10
Widget:Heart.Bitmap.Row1 '.....|.....|.....|.....|.....|.....'
Widget:Heart.Bitmap.Row2 '.*.*.|.....|.*.*.|.....|.....|.....'
Widget:Heart.Bitmap.Row3 '*****|.*.*.|*****|.*.*.|.*.*.|.*.*.'
Widget:Heart.Bitmap.Row4 '*****|.***.|*****|.***.|.***.|.***.'
Widget:Heart.Bitmap.Row5 '.***.|.***.|.***.|.***.|.***.|.***.'
Widget:Heart.Bitmap.Row6 '.***.|..*..|.***.|..*..|..*..|..*..'
Widget:Heart.Bitmap.Row7 '..*..|.....|..*..|.....|.....|.....'
Widget:Heart.Bitmap.Row8 '.....|.....|.....|.....|.....|.....'
Widget:Heart.class 'Icon'
Widget:Heart.speed 250
Widget:Heartbeat.Bitmap.Row1 '.....|.....'
Widget:Heartbeat.Bitmap.Row2 '.*.*.|.*.*.'
Widget:Heartbeat.Bitmap.Row3 '*****|*.*.*'
Widget:Heartbeat.Bitmap.Row4 '*****|*...*'
Widget:Heartbeat.Bitmap.Row5 '.***.|.*.*.'
Widget:Heartbeat.Bitmap.Row6 '.***.|.*.*.'
Widget:Heartbeat.Bitmap.Row7 '..*..|..*..'
Widget:Heartbeat.Bitmap.Row8 '.....|.....'
Widget:Heartbeat.class 'Icon'
Widget:Heartbeat.speed 800
Widget:ImageTest.class 'Image'
Widget:ImageTest.file 'tux.png'
Widget:ImageTest.inverted 0
Widget:ImageTest.update 1000
Widget:ImageTest.visible 1
Widget:Karo.Bitmap.Row1 '.....|.....|.....|.....|..*..|.....|.....|.....'
Widget:Karo.Bitmap.Row2 '.....|.....|.....|..*..|.*.*.|..*..|.....|.....'
Widget:Karo.Bitmap.Row3 '.....|.....|..*..|.*.*.|*...*|.*.*.|..*..|.....'
Widget:Karo.Bitmap.Row4 '.....|..*..|.*.*.|*...*|.....|*...*|.*.*.|..*..'
Widget:Karo.Bitmap.Row5 '.....|.....|..*..|.*.*.|*...*|.*.*.|..*..|.....'
Widget:Karo.Bitmap.Row6 '.....|.....|.....|..*..|.*.*.|..*..|.....|.....'
Widget:Karo.Bitmap.Row7 '.....|.....|.....|.....|..*..|.....|.....|.....'
Widget:Karo.Bitmap.Row8 '.....|.....|.....|.....|.....|.....|.....|.....'
Widget:Karo.class 'Icon'
Widget:Karo.speed 200
Widget:KVV.align 'L'
Widget:KVV.class 'Text'
Widget:KVV.expression kvv::line(0).' '.kvv::station(0)
Widget:KVV.Foreground 'ffff00'
Widget:KVV.style 'bold'
Widget:KVV.update tick
Widget:KVV.width 11
Widget:KVV_TIME.align 'R'
Widget:KVV_TIME.class 'Text'
Widget:KVV_TIME.expression kvv::time_str(0)
Widget:KVV_TIME.foreground kvv::time(0) < 2 ? 'FF0000' : ( kvv::time(0) < 5 ? 'FFFF00' : '00FF00' )
Widget:KVV_TIME.style 'bold'
Widget:KVV_TIME.update tick
Widget:KVV_TIME.width 2
Widget:Lightning.bitmap.row1 '...***'
Widget:Lightning.bitmap.row2 '..***.'
Widget:Lightning.bitmap.row3 '.***..'
Widget:Lightning.bitmap.row4 '.****.'
Widget:Lightning.bitmap.row5 '..**..'
Widget:Lightning.bitmap.row6 '.**...'
Widget:Lightning.bitmap.row7 '**....'
Widget:Lightning.bitmap.row8 '*.....'
Widget:Lightning.class 'icon'
Widget:Lightning.speed 100
Widget:Lightning.visible cpu('busy', 500)-50
Widget:LightningTest.bitmap.row1 '...***'
Widget:LightningTest.bitmap.row2 '..***.'
Widget:LightningTest.bitmap.row3 '.***..'
Widget:LightningTest.bitmap.row4 '.****.'
Widget:LightningTest.bitmap.row5 '..**..'
Widget:LightningTest.bitmap.row6 '.**...'
Widget:LightningTest.bitmap.row7 '**....'
Widget:LightningTest.bitmap.row8 '*.....'
Widget:LightningTest.class 'icon'
Widget:LightningTest.speed 500
Widget:LightningTest.visible test::onoff(0)
Widget:Load.align 'R'
Widget:Load.class 'Text'
Widget:Load.expression loadavg(1)
Widget:Load.postfix loadavg(1)>1.0?'!':' '
Widget:Load.precision 1
Widget:Load.prefix 'Load'
Widget:Load.update tick
Widget:Load.width 10
Widget:LoadBar.class 'Bar'
Widget:LoadBar.direction 'E'
Widget:LoadBar.expression loadavg(1)
Widget:LoadBar.length 10
Widget:LoadBar.max 2.0
Widget:LoadBar.update tack
Widget:MySQLtest1.align 'R'
Widget:MySQLtest1.class 'Text'
Widget:MySQLtest1.expression MySQL::query('SELECT id FROM table1')
Widget:MySQLtest1.prefix 'MySQL test:'
Widget:MySQLtest1.update minute
Widget:MySQLtest1.width 20
Widget:MySQLtest2.align 'M'
Widget:MySQLtest2.class 'Text'
Widget:MySQLtest2.expression MySQL::status()
Widget:MySQLtest2.prefix 'Status: '
Widget:MySQLtest2.update minute
Widget:MySQLtest2.width 20
Widget:OS.align 'M'
Widget:OS.class 'Text'
Widget:OS.expression '*** '.uname('sysname').' '.uname('release').' ***'
Widget:OS.speed 50
Widget:OS.style 'bold'
Widget:OS.update tick
Widget:OS.width 20
Widget:PPP.align 'R'
Widget:PPP.class 'Text'
Widget:PPP.expression (ppp('Rx:0', 500)+ppp('Tx:0', 500))
Widget:PPP.precision 0
Widget:PPP.prefix 'PPP'
Widget:PPP.update tick
Widget:PPP.width 9
Widget:Rain.bitmap.row1 '...*.|.....|.....|.*...|....*|..*..|.....|*....'
Widget:Rain.bitmap.row2 '*....|...*.|.....|.....|.*...|....*|..*..|.....'
Widget:Rain.bitmap.row3 '.....|*....|...*.|.....|.....|.*...|....*|..*..'
Widget:Rain.bitmap.row4 '..*..|.....|*....|...*.|.....|.....|.*...|....*'
Widget:Rain.bitmap.row5 '....*|..*..|.....|*....|...*.|.....|.....|.*...'
Widget:Rain.bitmap.row6 '.*...|....*|..*..|.....|*....|...*.|.....|.....'
Widget:Rain.bitmap.row7 '.....|.*...|....*|..*..|.....|*....|...*.|.....'
Widget:Rain.bitmap.row8 '.....|.....|.*...|....*|..*..|.....|*....|...*.'
Widget:Rain.class 'icon'
Widget:Rain.speed 200
Widget:RAM.align 'R'
Widget:RAM.class 'Text'
Widget:RAM.expression meminfo('MemTotal')/1024
Widget:RAM.postfix ' MB RAM'
Widget:RAM.precision 0
Widget:RAM.update tick
Widget:RAM.width 11
Widget:Squirrel.Bitmap.Row1 '.....|.....|.....|.....|.....|.....'
Widget:Squirrel.Bitmap.Row2 '.....|.....|.....|.....|.....|.....'
Widget:Squirrel.Bitmap.Row3 '.....|.....|.....|.....|.....|.....'
Widget:Squirrel.Bitmap.Row4 '**...|.**..|..**.|...**|....*|.....'
Widget:Squirrel.Bitmap.Row5 '*****|*****|*****|*****|*****|*****'
Widget:Squirrel.Bitmap.Row6 '...**|..**.|.**..|**...|*....|.....'
Widget:Squirrel.Bitmap.Row7 '.....|.....|.....|.....|.....|.....'
Widget:Squirrel.Bitmap.Row8 '.....|.....|.....|.....|.....|.....'
Widget:Squirrel.class 'Icon'
Widget:Squirrel.speed 100
Widget:Temp.align 'R'
Widget:Temp.class 'Text'
Widget:Temp.expression i2c_sensors('temp_input3')*1.0324-67
Widget:Temp.precision 1
Widget:Temp.prefix 'Temp'
Widget:Temp.update tick
Widget:Temp.width 9
Widget:TempBar.class 'Bar'
Widget:TempBar.direction 'E'
Widget:TempBar.expression i2c_sensors('temp_input3')*1.0324-67
Widget:TempBar.length 10
Widget:TempBar.max 80
Widget:TempBar.min 40
Widget:TempBar.update tack
Widget:Test.class 'Text'
Widget:Test.expression '1234567890123456789012345678901234567890'
Widget:Test.foreground 'ff0000ff'
Widget:Test.width 40
Widget:Test1.align 'M'
Widget:Test1.class 'Text'
Widget:Test1.expression 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890'
Widget:Test1.speed 100
Widget:Test1.width 40
Widget:Test2.align 'M'
Widget:Test2.class 'Text'
Widget:Test2.expression '1234567890abcdefghijklmnopqrstuvwxyz'
Widget:Test2.speed 150
Widget:Test2.width 40
Widget:Timer.Bitmap.Row1 '.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|'
Widget:Timer.Bitmap.Row2 '.***.|.*+*.|.*++.|.*++.|.*++.|.*++.|.*++.|.*++.|.*++.|.*++.|.*++.|.*++.|.+++.|.+*+.|.+**.|.+**.|.+**.|.+**.|.+**.|.+**.|.+**.|.+**.|.+**.|.+**.|'
Widget:Timer.Bitmap.Row3 '*****|**+**|**++*|**+++|**++.|**++.|**+++|**+++|**+++|**+++|**+++|+++++|+++++|++*++|++**+|++***|++**.|++**.|++***|++***|++***|++***|++***|*****|'
Widget:Timer.Bitmap.Row4 '*****|**+**|**+**|**+**|**+++|**+++|**+++|**+++|**+++|**+++|+++++|+++++|+++++|++*++|++*++|++*++|++***|++***|++***|++***|++***|++***|*****|*****|'
Widget:Timer.Bitmap.Row5 '*****|*****|*****|*****|*****|***++|***++|**+++|*++++|+++++|+++++|+++++|+++++|+++++|+++++|+++++|+++++|+++**|+++**|++***|+****|*****|*****|*****|'
Widget:Timer.Bitmap.Row6 '.***.|.***.|.***.|.***.|.***.|.***.|.**+.|.*++.|.+++.|.+++.|.+++.|.+++.|.+++.|.+++.|.+++.|.+++.|.+++.|.+++.|.++*.|.+**.|.***.|.***.|.***.|.***.|'
Widget:Timer.Bitmap.Row7 '.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|'
Widget:Timer.Bitmap.Row8 '.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|.....|'
Widget:Timer.class 'Icon'
Widget:Timer.speed 50
Widget:Uptime.align 'R'
Widget:Uptime.class 'Text'
Widget:Uptime.expression uptime('%d days %H:%M:%S')
Widget:Uptime.prefix 'Up '
Widget:Uptime.update 1000
Widget:Uptime.width 20
Widget:Wave.Bitmap.Row1 '..**.|.**..|**...|*....|.....|.....|.....|.....|....*|...**'
Widget:Wave.Bitmap.Row2 '.*..*|*..*.|..*..|.*...|*....|.....|.....|....*|...*.|..*..'
Widget:Wave.Bitmap.Row3 '*....|....*|...*.|..*..|.*...|*....|....*|...*.|..*..|.*...'
Widget:Wave.Bitmap.Row4 '*....|....*|...*.|..*..|.*...|*....|....*|...*.|..*..|.*...'
Widget:Wave.Bitmap.Row5 '*....|....*|...*.|..*..|.*...|*....|....*|...*.|..*..|.*...'
Widget:Wave.Bitmap.Row6 '.....|.....|....*|...*.|..*..|.*..*|*..*.|..*..|.*...|*....'
Widget:Wave.Bitmap.Row7 '.....|.....|.....|....*|...**|..**.|.**..|**...|*....|.....'
Widget:Wave.Bitmap.Row8 '.....|.....|.....|.....|.....|.....|.....|.....|.....|.....'
Widget:Wave.class 'Icon'
Widget:Wave.speed 100

plugin_cfg.c: Variable minute = '60000' (60000)
plugin_cfg.c: Variable tack = '100' (100)
plugin_cfg.c: Variable tick = '500' (500)
lcd4linux.c: initializing driver picoLCD
drv_init(picoLCD) failed: no such driver
Error initializing driver picoLCD: Exit!
root@OpenWrt:/#

Something has gone wrong. The message drv_init(picoLCD) failed: no such driver signifies that we have chosen a wrong type of LCD display. Let’s open the file etc/lcd4linux.conf by vi for the configuration of lcd4linux and let’s correct it a little.

Let’s comment the line Display 'picoLCD':
#Display 'picoLCD'

Let’s comment out the line #Display 'LCD2USB':
Display 'LCD2USB'

Let’s try again:

root@OpenWrt:/# lcd4linux -Fvv
LCD4Linux 0.11.0-SVN-1092 starting
security error: group or other have access to '/etc/lcd4linux.conf'

Wrong again. We should change the rights for the file /etc/lcd4linux.conf

root@OpenWrt:/# chmod 600 /etc/lcd4linux.conf

Let’s start once again:

root@OpenWrt:/# lcd4linux -Fv
LCD4Linux 0.11.0-SVN-1092 starting
LCD2USB: $Rev: 975 $
LCD2USB: scanning USB for LCD2USB interface ...
LCD2USB: found LCD2USB interface on bus 001 device 005
LCD2USB: echo test successful
LCD2USB: firmware version 1.09
LCD2USB: installed controllers: CTRL0
LCD2USB: reserving 1 of 8 user-defined characters for icons
initializing layout 'L20x2'
Creating new timer group (500 ms)
widget 'Load': Class 'text', Parent '', Layer 1, Row 0, Col 0 (to 0,10)
Creating new timer group (100 ms)
widget 'LoadBar': Class 'bar', Parent '', Layer 1, Row 0, Col 10 (to 0,19)
widget 'Busy': Class 'text', Parent '', Layer 1, Row 1, Col 0 (to 1,9)
widget 'BusyBar': Class 'bar', Parent '', Layer 1, Row 1, Col 10 (to 1,19)

Great! It should look like this:

Usb2Lcd is an open-source project that’s why it can be built by ourself.

lcd

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