Difference between revisions of "LCD"

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m (User space tools / library found to control // LCD)
(LCDs without controller: TM035: "no more sold by Armadeus Systems" -> Not true !)
 
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===LCDs with integrated controller===
 
===LCDs with integrated controller===
* your LCD has a built-in controller with a parallel interface -> usage of i.MXL LCD pins as GPIOs and emulation of a PC parallel port to reuse existing software
+
* your LCD has a built-in controller with a parallel interface:
* your LCD has a built-in controller with a serial interface (not supported yet)
+
** -> usage of i.MX LCD pins as GPIOs and emulation of a PC parallel port to reuse existing software
 +
* your LCD has a built-in controller with a serial interface:
 +
** -> not supported yet
  
 
===LCDs without controller===
 
===LCDs without controller===
 
These LCDs can be used with i.MX internal LCD controller, ie direct connection between LCD & i.MX pins. Tested LCDs are:
 
These LCDs can be used with i.MX internal LCD controller, ie direct connection between LCD & i.MX pins. Tested LCDs are:
* [[LQ043_Adapt | Sharp LQ043 (480x270) TFT ]] <strong> (Default 256k colors TFT for Armadeus Project)</strong>
+
* [[LQ043_Adapt | Sharp LQ043 (480x270) TFT ]] (old default APF9328Dev LCD, no more sold by Armadeus Systems)
* [[Chimey LW700 |LW700AT (800x480) TFT ]]
+
* [[Chimey LW700 |LW700AT (800x480) TFT ]] (old default APF27Dev/APF51Dev LCD, no more sold by Armadeus Systems)
 +
* [[Santek ST070015 |ST070015 (800x480) TFT ]] <strong> (Default APF27Dev/APF51Dev/APF28Dev 256k colors TFT sold by Armadeus Systems)</strong>
 
* [[MTF-T035|Microtips MTF-035 (320x240) TFT]]
 
* [[MTF-T035|Microtips MTF-035 (320x240) TFT]]
 
* [[MotLCD|Motorola A910 (240x320) TFT]]
 
* [[MotLCD|Motorola A910 (240x320) TFT]]
 
* [[LQ057|Sharp LQ057 (320x240) TFT]]
 
* [[LQ057|Sharp LQ057 (320x240) TFT]]
 +
* [[Tianma_TM035|TM035 (320x240) TFT ]] (old default APF28Dev LCD, sold by Armadeus Systems)
 
5v logic one:
 
5v logic one:
 
* Tianma STN Monochrome 320x240
 
* Tianma STN Monochrome 320x240
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|----------------
|  None (use i.MXL one) || RGB datas + control signals || [[FrameBuffer]] || SDL / Qt / ... || style="background:#00ff55;" | Yes
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|  None (use i.MX one) || RGB datas + control signals || [[FrameBuffer]] || SDL / Qt / ... || style="background:#00ff55;" | Yes
 
|----------------
 
|----------------
 
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Latest revision as of 15:43, 13 July 2015

On this page, you will find all the information needed to use Liquid Crystal Display (LCD) with your Armadeus board.

Hardware interface

LCDs can be divided into 2 main categories:

  • "intelligent" LCD with a built-in controller
  • LCD without controller

LCDs with integrated controller

  • your LCD has a built-in controller with a parallel interface:
    • -> usage of i.MX LCD pins as GPIOs and emulation of a PC parallel port to reuse existing software
  • your LCD has a built-in controller with a serial interface:
    • -> not supported yet

LCDs without controller

These LCDs can be used with i.MX internal LCD controller, ie direct connection between LCD & i.MX pins. Tested LCDs are:

5v logic one:

  • Tianma STN Monochrome 320x240
  • Ampire/xxx STN Monochrome 240x128

Software API

Generally on Linux you would need a kernel part (=driver) and a user space part (=library) to control and use your LCD in a reusable way.

Built-in Controller Interface Driver Library Working?
HD44780 // 4 bits data GPIO_Driver + PPDEV LCD4Linux Yes
KS0108 // 8 bits data GPIO_Driver + PPDEV  ?? Not tested
None (use i.MX one) RGB datas + control signals FrameBuffer SDL / Qt / ... Yes

LCDs with controller

Parallel interface

Driver: Use Linux Armadeus GPIO driver with it's PPDEV emulation User space: Use either LCD4linux or Lcdproc depending on your application

Text: - HD 44780 (tested with GpioDriver driver (+ppdev emulation) and LCD4Linux

Graphic: - KS0108 (Nico and Juju have one sample, not tested yet because LC4Linux don't support it) - ?

User space tools / library found to control // LCD

LCD4linux Mainly used to display system information, not very customizable for user GUI