[lcd4linux] Strings too long or truncated

[XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX]

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXX

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...


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