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Hello,
i'm using a HD44780-based LCD with 16x2 on Debian Lenny. It's connected
by "Winamp-Wiring"
(http://www.modding-faq.de/index.php?artid=601&page=3) and works fine so
far, but I noticed a problem when I wanted to change some of the
widgets. Hence I stripped it down to a minimal configuration for
debugging.
====================================
Expected Result (. means blank space):
|20c.............|
|1234567890abcdef|
Actual Result:
[20.......c......]
[1234567890......]
!root@urknall:~# uname -a
Linux urknall 2.6.26-2-xen-686 #1 SMP Mon Mar 5 02:55:27 UTC 2012 i686
GNU/Linux
!root@urknall:~# dpkg -l lcd4linux
ii lcd4linux 0.10.1~rc2-2
Grabs information and displays it on an external lcd
!root@urknall:~# cat /etc/lcd4linux.conf
Display HD44780-16x2 {
Driver 'HD44780'
Model 'generic'
UseBusy 1
Port '/dev/parport0'
Size '16x2'
Wire {
RW 'AUTOFD'
RS 'INIT'
ENABLE 'STROBE'
ENABLE2 'GND'
GPO 'GND'
BACKLIGHT 'GND'
GPO 'GND'
POWER 'GND'
}
}
Widget MyTemperatureCPU {
class 'Text'
# expression file::readline('/tmp/stats/temperature_cpu.txt',1)
expression '26'
length 3
postfix 'c'
update 10000
}
Widget OneTwoThree {
class 'Text'
expression '1234567890abcdef'
length 16
update 60000
}
Layout Default {
Row1 {
Col1 'MyTemperatureCPU'
}
Row2 {
Col1 'OneTwoThree'
}
}
====================================
I also tried a fresh compiled binary from SVN. The only change is that
the first line is now completely omitted. If I comment "length" out,
nothing changes. Different alignments are also useless, except "A" (not
supported in lenny's version). The string is now scrolling, but still 10
chars long. "strlen" says 2 for row one and 16 for row two.
====================================
!root@urknall:~# /tmp/lcd4linux -Fvvq
LCD4Linux 0.11.0-SVN-1158 starting
cfg.c: Warning: key <Display:HD44780-16x2.Wire.GPO>: value <'GND'>
overwritten with <'GND'>
Dump of /etc/lcd4linux.conf:
Display 'HD44780-16x2'
Display:HD44780-16x2.Driver 'HD44780'
Display:HD44780-16x2.Model 'generic'
Display:HD44780-16x2.Port '/dev/parport0'
Display:HD44780-16x2.Size '16x2'
Display:HD44780-16x2.UseBusy 1
Display:HD44780-16x2.Wire.BACKLIGHT 'GND'
Display:HD44780-16x2.Wire.ENABLE 'STROBE'
Display:HD44780-16x2.Wire.ENABLE2 'GND'
Display:HD44780-16x2.Wire.GPO 'GND'
Display:HD44780-16x2.Wire.POWER 'GND'
Display:HD44780-16x2.Wire.RS 'INIT'
Display:HD44780-16x2.Wire.RW 'AUTOFD'
Layout 'Default'
Layout:Default.Row1.Col1 'MyTemperatureCPU'
Layout:Default.Row2.Col1 'OneTwoThree'
Widget:MyTemperatureCPU.class 'Text'
Widget:MyTemperatureCPU.expression '26'
Widget:MyTemperatureCPU.length 3
Widget:MyTemperatureCPU.postfix 'c'
Widget:MyTemperatureCPU.update 10000
Widget:OneTwoThree.class 'Text'
Widget:OneTwoThree.expression '1234567890abcdef'
Widget:OneTwoThree.length 16
Widget:OneTwoThree.update 60000
lcd4linux.c: initializing driver HD44780
HD44780: $Rev: 1066 $
HD44780: using model 'generic'
HD44780: using parallel port
HD44780: using 1 Controller(s)
HD44780: using 8 bit mode
udelay: using gettimeofday() delay loop
HD44780: using ppdev /dev/parport0
HD44780: wiring: DISPLAY:RS - PARPORT:INIT (Pin 16)
HD44780: wiring: DISPLAY:RW - PARPORT:AUTOFD (Pin 14)
HD44780: wiring: DISPLAY:ENABLE - PARPORT:STROBE (Pin 1)
HD44780: wiring: DISPLAY:ENABLE2 - PARPORT:GND
HD44780: wiring: DISPLAY:ENABLE3 - PARPORT:GND
HD44780: wiring: DISPLAY:ENABLE4 - PARPORT:GND
HD44780: wiring: DISPLAY:BACKLIGHT - PARPORT:GND
HD44780: wiring: DISPLAY:GPO - PARPORT:GND
HD44780: wiring: DISPLAY:GPI - PARPORT:GND
HD44780: wiring: DISPLAY:POWER - PARPORT:GND
HD44780: timing: CY = 1000 ns (default)
HD44780: timing: PW = 450 ns (default)
HD44780: timing: AS = 140 ns (default)
HD44780: timing: AH = 20 ns (default)
HD44780: timing: INIT1 = 4100 us (default)
HD44780: timing: INIT2 = 100 us (default)
HD44780: timing: EXEC = 80 us (default)
HD44780: timing: WRCG = 120 us (default)
HD44780: timing: CLEAR = 2250 us (default)
HD44780: timing: HOME = 2250 us (default)
HD44780: timing: ONOFF = 2250 us (default)
HD44780: using busy-flag checking
HD44780: using 0 GPI's and 0 GPO's
initializing layout 'Default'
layout.c: Layout:Default: migrating 'row1.col1' to 'Layer:1.row1.col1'
layout.c: Layout:Default: migrating 'row2.col1' to 'Layer:1.row2.col1'
Creating new timer group (10000 ms)
widget 'MyTemperatureCPU': Class 'text', Parent '<root>', Layer 1, Row
0, Col 0 (to 0,10)
Creating new timer group (60000 ms)
widget 'OneTwoThree': Class 'text', Parent '<root>', Layer 1, Row 1,
Col 0 (to 1,10)
lcd4linux.c: starting main loop
^Clcd4linux.c: got signal 2
lcd4linux.c: leaving main loop
HD44780: shutting down display.
HD44780: shutting down GPIO driver.
drv_generic_parport.c: closing ppdev /dev/parport0
====================================
Is this normal or a nasty bug? I appreciate any ideas...
Archilles
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