Re: [lcd4linux] LCD4Linux Help!

[Piet v. d. B. <pv...@te...>]

Hi Matthew,

Did you check the contrast of the LCD's ?
Another thing that can be the problem is the newer parallel ports use 
3.3 Volt on the pins
and most of the LCD's needs 5 Volt to operate. You should check this out.
Perhaps some other list member can check the config for you.

regards
Piet


On 16-2-2015 10:04, Matthew Hodder wrote:
> Hi all,
>
> Hoping someone can point me in the right direction.
>
> I'm running LCD4Linux on a Sophos UTM box (Suse base), I suspect I may 
> have a dud parallel port, but wanted someone elses thoughts.
>
> LCD4Linux is compiled with just the HD44870 driver, I'm doing a basic 
> config just to prove I can get a display up on the LCD. I have 
> double/triple checked wiring and I'm sure I have it right.
>
> My config file looks like this:
>
> ----------------------------------------------------------------
>
> Display HD44780-winamp {
>     Driver  'HD44780'
>     Model   'generic'
>     UseBusy  1
>     Port    '/dev/parport0'
>     Size    '16x2'
>     Wire {
>         RW        'AUTOFD'
>         RS        'INIT'
>         ENABLE    'STROBE'
>         ENABLE2   'GND'
>         GPO       'GND'
>    }
> }
>
>
> Widget MEM {
>     class      'Text'
>     expression  meminfo('MemTotal')/1024
>     prefix     'MB:'
>     width       11
>     align      'L'
>     precision  '0'
>     update      1000
> }
>
> Layout Default {
>     Row1 {
>         Col1 'MEM'
>     }
> }
>
> Display 'HD44780-winamp'
> Layout  'Default'
>
> ----------------------------------------------------------------
>
> When I run it using: sudo /sbin/lcd4linux -Fvv
>
> I get the following:
>
> ----------------------------------------------------------------
>
> Version 0.11.0-SVN-965 starting
> lcd4linux.c: initializing driver HD44780
> HD44780: $Rev: 905 $
> 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: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: timeout waiting for busy flag on controller 1 (0xff)
> HD44780: too many busy flag failures, turning off busy flag checking.
> HD44780: using 0 GPI's and 0 GPO's
> initializing layout 'Default'
>  widget 'MEM': Class 'text', Parent '<root>', Layer 1, Row 0, Col 0
> lcd4linux.c: starting main loop
>
> ----------------------------------------------------------------
>
> But nothing ever displays on the LCD. I get the above regardless if 
> the LCD is connected or not, so I simply don't think it is seeing the 
> LCD at all. I have tried two different LCDs as well with the same result
>
> Any pointers from here or how I can trouble shoot further?
>
> Thanks in advance!
>
> Regards,
> Matt Hodder
>
>
> ------------------------------------------------------------------------------
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