LCD question

S

Sérgio

Guest
Hi guys,

I have a graphical LCD controlled by SED1335 controller. My problem is
that the LCD isn't working. I tried with ATmega64L, it did not work,
then I tried with LCD Studio(http://www.lcdstudio.com, versions 1.5 and
2.0 beta) as usual it did not work. I not sure if the LCD isn't broken,
every time I reset the LCD it shows a horizontal line at a different
positions, the line only appears while the reset button is pressed. I
also tried to pull-up the data bus and the control pins from the
parallel port. Any help would be appreciated.

Best regards,
Sergio.
 
Sérgio wrote:

Hi guys,

I have a graphical LCD controlled by SED1335 controller. My problem is
that the LCD isn't working. I tried with ATmega64L, it did not work,
then I tried with LCD Studio(http://www.lcdstudio.com, versions 1.5 and
2.0 beta) as usual it did not work. I not sure if the LCD isn't broken,
every time I reset the LCD it shows a horizontal line at a different
positions, the line only appears while the reset button is pressed. I
also tried to pull-up the data bus and the control pins from the
parallel port. Any help would be appreciated.
Click to expand...
Beside that the timing can be critical, eg the reset
has to be sufficiently long, the control voltage has
to be applies with the correct sign and range.
Recheck all commands sent to it, to start with.

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
 
I press the reset button for a few miliseconds in the worst case. Sorry
I forgot to mention that the sed1335 is a build-in controller.
 
sergio
have you delayed enuf after sending instructions
to the LCD? I worked with a DG-12864
which uses HD61202s
and you either had to wait for a ready signal
or delay a safe time before proceeding

Larry Keegan in Stoneham, MA
 
I'm reading the status from the controller, now I'm suspecting that the
controller is damaged, I not sure how to check if this is true. I
disconnected all wires and reconnect then again, I also verified if the
LCD Studio is sending the signal to controller pins, It is sending
something, but since the software don't error any error don't have a
way to check if the parameters are correct. A friend of mine did test
this LCD in the same way I'm doing now and it worked. So, or the LCD is
damage or I'm doing something really really stupid.
 
:D Opsss
"...t is sending something, but since the software don't show any error
I don't have a way to check if the parameters are correct..."
 
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