How to get this display to work ?

Bernhard · 22nd March 2004, 01:01 AM

Hi,

this is a push button with integrated LCD graphic display.

There is a row of 4 pins for the display.

If one is V+ and another ground, two are left.

How to get the data into the display with two wires ?
Also backlight depends on this. Red / green.

Thanks, Bernhard

till · 22nd March 2004, 01:04 AM

one of those two lines for clock, one line for data. Each time a clock bit comes, the state of dataline ich written in a register. This register may be 8 or 16 Bits wide. The states of the display (color, characters whatever) are coded to word of same lenghts as this register. each time the register is full/ 8 or 16 bits are written, the state changes.

Should work.

Bernhard · 22nd March 2004, 01:15 AM

That was my idea too, but...

If you have the clock bit and start data transmission, how does the register know when comes the next bit ?

There must be some data frequency that has to be complied with.

Or some other strange protocol.
Like a short pulse and after that a longer data bit and a short pulse again.

But possibilities for that are infinite.

Rahul · 22nd March 2004, 07:08 AM

It may be running on I2C bus.
Regards
Rahul

22nd March 2004, 01:01 AM	#1
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	How to get this display to work ? Hi, this is a push button with integrated LCD graphic display. There is a row of 4 pins for the display. If one is V+ and another ground, two are left. How to get the data into the display with two wires ? Also backlight depends on this. Red / green. Thanks, Bernhard

22nd March 2004, 07:08 AM	#4
Rahul diyAudio Member Join Date: Mar 2004 Location: Lucknow , North central India	It may be running on I2C bus. Regards Rahul __________________ We can make it work

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22nd March 2004, 01:04 AM	#2
till Banned Join Date: Apr 2002 Location: Germany, Clausthal	one of those two lines for clock, one line for data. Each time a clock bit comes, the state of dataline ich written in a register. This register may be 8 or 16 Bits wide. The states of the display (color, characters whatever) are coded to word of same lenghts as this register. each time the register is full/ 8 or 16 bits are written, the state changes. Should work.

22nd March 2004, 01:15 AM	#3
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	That was my idea too, but... If you have the clock bit and start data transmission, how does the register know when comes the next bit ? There must be some data frequency that has to be complied with. Or some other strange protocol. Like a short pulse and after that a longer data bit and a short pulse again. But possibilities for that are infinite.

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