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Re: [lcd4linux] LCD4Linux Help!
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From: Piet v. d. B. <pv...@te...> - 2015-02-16 15:50:30
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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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