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LCD question

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

formatting link
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.

Reply to
SérgioúÇ«‚*+¢V§²H ™¨¥r‰
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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.

Reply to
SérgioúÇ«‚*+¢V§²H ™¨¥r‰

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

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Ing.Buero R.Tschaggelar - http://www.ibrtses.com
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Reply to
Rene Tschaggelar

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

Reply to
larry k

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.

Reply to
SérgioúÇ«‚*+¢V§²H ™¨¥r‰

: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..."

Reply to
SérgioúÇ«‚*+¢V§²H ™¨¥r‰

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