[Linux-fbdev-users] New framebuffer

[Christian G. <cjg...@2d...>]

Hello All,
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Hello,=20
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I have to write a frame buffer to control my graphic LCD.  Since this
LCD=20
controller has only these I/O (Enable, R/W, Chip Select and D0 ... D7
(data)),=20
i'm using GPIO of my microcontroller to control this device. It's why I=20
control it through the framebuffer driver. I wonder if I can mmap() a
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memory for LCD display.  It's for userland application (like nano-x
engine)=20
which some memory mapping is done.   Since the lcd device is not
attached to=20
the external bus interface (Address, Data and control IO) of my=20
microcontroller,  it's why I wonder if we can mmap() it. Almost of
graphic=20
cards can mapped physically the memory because the video memory is
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allocated. My case is different because the LCD is connected to GPIO.  =20
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For example, Userland application change some bytes (pixels) on this
allocated=20
memory, then update is done directly on LCD display.... (ideal world)!=20
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Microcontroller : AT91RM900 from Atmel=20
LCD graphic : LM6800 from TopWayDisplay=20
              Resolution : 256 X 64=20
              1 Color=20
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If anybody can help me, I'll appreciate it.=20
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Regards=20
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Christian=20