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[Lcdproc] lcdproc v0.5.3 - ConnectionType=ftdi [[ Segmentation fault ]]


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  • From: santanu at hep.phy.cam.ac.uk (Santanu Das)
  • Subject: [Lcdproc] lcdproc v0.5.3 - ConnectionType=ftdi [[ Segmentation fault ]]
  • Date: Mon, 25 Oct 2010 10:23:28 +0100

Thanks Thomas for your input. This "display" things are more complicated than
I thought.
Anyway, what's the best beat for me? Any advice?

Cheers,
Santanu



On 25/10/10 10:00, Thomas Jarosch wrote:
> On Sunday, 24. October 2010 21:21:42 Santanu Das wrote:
>
>>> Displays like Mplay (or Crystalfontz or MatrixOrbital) usually have the
>>> display connected to a microcontroller instead which takes care of
>>> displaying the data. That MC has to be connected to the computer
>>> somehow. One common way is to use a FT232 to connect the MC to the PC
>>> using USB. On the PC side the display appears as a serial port to
>>> which an application (like LCDd) can send/read data.
>>>
>> I think, that's exactly what it does; it uses FT232 USB to COM chip.
>>
> That's the tricky part: The chip can be operated in two different modes.
> Normal COM serial I/O and bitbang I/O. Bitbang mode disables the
> serial handshake and you can control the single I/O lines
> much like a parallel port.
>
> Displays normally use a serial COM interface and just add
> a FTDI chip to provide an USB interface.
>
> Cheers,
> Thomas
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