Difference between revisions of "LCD"

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(→‎LCDs without controller: TM035: "no more sold by Armadeus Systems" -> Not true !)
 
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On this page, you will find all the informations needed to use LCD on Armadeus.
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On this page, you will find all the information needed to use Liquid Crystal Display (LCD) with your Armadeus board.
  
 
== Hardware interface ==
 
== Hardware interface ==
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LCDs can be divided into 2 main categories:
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* "intelligent" LCD with a built-in controller
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* LCD without controller
  
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Two possibilities:
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===LCDs with integrated controller===
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* LCD can be used with i.MX LCD controller -> direct connection to i.MX LCD pins (ex: [[MotLCD]] )
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* your LCD has a built-in controller with a parallel interface:
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* 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
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** -> usage of i.MX LCD pins as GPIOs and emulation of a PC parallel port to reuse existing software
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* ?? Should we support serial interface ?.
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* your LCD has a built-in controller with a serial interface:
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** -> not supported yet
  
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== Supported LCD / Software API ==
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===LCDs without controller===
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=== Which LCD controller are we going to support (for parallel port/GPIO interface) ===
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These LCDs can be used with i.MX internal LCD controller, ie direct connection between LCD & i.MX pins. Tested LCDs are:
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* [[LQ043_Adapt | Sharp LQ043 (480x270) TFT ]] (old default APF9328Dev LCD, no more sold by Armadeus Systems)
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* [[Chimey LW700 |LW700AT (800x480) TFT ]] (old default APF27Dev/APF51Dev LCD, no more sold by Armadeus Systems)
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* [[Santek ST070015 |ST070015 (800x480) TFT ]] <strong> (Default APF27Dev/APF51Dev/APF28Dev 256k colors TFT sold by Armadeus Systems)</strong>
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* [[MTF-T035|Microtips MTF-035 (320x240) TFT]]
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* [[MotLCD|Motorola A910 (240x320) TFT]]
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* [[LQ057|Sharp LQ057 (320x240) TFT]]
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* [[Tianma_TM035|TM035 (320x240) TFT ]] (old default APF28Dev LCD, sold by Armadeus Systems)
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5v logic one:
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* Tianma STN Monochrome 320x240
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* Ampire/xxx STN Monochrome 240x128
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==Software API==
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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.
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{| border="1" cellpadding="5" cellspacing="0" summary="LCD software APIs"
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|- style="background:#efefef;"
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! ''' Built-in Controller ''' || ''' Interface ''' || '''Driver''' || '''Library''' || '''Working?'''
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|----------------
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|  HD44780 || // 4 bits data || [[GPIO_Driver]] + PPDEV || LCD4Linux || style="background:#00ff55;" | Yes
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|----------------
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|  KS0108 || // 8 bits data || [[GPIO_Driver]] + PPDEV || ?? || style="background:#ddff00;" | Not tested
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|----------------
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|  ||  || || ||
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|----------------
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|  None (use i.MX one) || RGB datas + control signals || [[FrameBuffer]] || SDL / Qt / ... || style="background:#00ff55;" | Yes
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|----------------
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|  ||  || || ||
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|----------------
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|}
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===LCDs with controller===
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====Parallel interface====
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Driver:
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Use Linux Armadeus [[GPIO_Driver|GPIO driver with it's PPDEV emulation]]
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User space:
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Use either [[LCD4linux]] or Lcdproc depending on your application
  
 
Text:
 
Text:
 
- HD 44780 (tested with GpioDriver driver (+ppdev emulation) and LCD4Linux
 
- HD 44780 (tested with GpioDriver driver (+ppdev emulation) and LCD4Linux
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- ?
 
  
 
Graphic:
 
Graphic:
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[[LCD4linux]]
 
[[LCD4linux]]
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Cool but mainly to display system informations, not very customizable for user GUI
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Mainly used to display system information, not very customizable for user GUI
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Lcdproc ??
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(Not tested)
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Other idea ??
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[[Category:Hardware]]
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[[Category:Displays]]
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[[Category:LCD]]

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

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