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[Lcdproc] Driving ST7066U


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  • From: philipp_subx at redfish-solutions.com (Philip Prindeville)
  • Subject: [Lcdproc] Driving ST7066U
  • Date: Thu, 9 Feb 2017 20:59:39 -0700


> On Feb 9, 2017, at 1:30 PM, Harald Geyer <harald at ccbib.org> wrote:
>
> Hi Philip,
>
> I haven't had time to look at the datasheets. However a few ideas:
>
> Philip Prindeville writes:
>> When I start up the install with these options changed (from defaults):
>>
>> Driver=hd44780
>>
>> ReportToSyslog=yes
>>
>> [hd44780]
>> ConnectType=8bit
>> Port=0x378
>> #Speed=0
>> Keypad=yes
>> #Backlight=yes
>> Size=20x2
>> vspan=2
>>
>>
>> I just get the backlight on the module flashing, with no information on
>> the display.
>
> The backlight flashing points to the wiring being different to what
> lcdproc expects, I think.

That’s exactly right.


>
>> Does anyone have any advice for troubleshooting this?
>
> Currently lcdproc supports 3 types of 8bit wirings:
> 8bit, winamp and lcm162


Winamp also flashes. lcm162 gives me the LCDproc message, but no backlight…


>
> I think you should be able to test the backlight wiring at least by
> connecting via telnet/netcat to LCDd and switching the backlight on/off
> manually.


Tried “hello/client_set name foobar/backlight on” but no joy in turning
up the backlight.

Well, that’s some progress…



>
> Only after this works, I'd spend effort on debugging the data pins.
>
> HTH,
> Harald


It did. Thanks.

-Philip






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