How to drive a LCD on ARM based linux System


 
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Operating Systems Linux How to drive a LCD on ARM based linux System
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Old 12-18-2007
Bug How to drive a LCD on ARM based linux System

Hello sir,

I am Vijay Manohar. I am a writing a device driver for LCD frame buffer device. In this , LCD has been mapped at physical address 0x3000000. Now I want to implement mmap entry point. I have two questions regarding this

Can I use this physical address as one of the parameters to remap_pfn_range.

How to use DMA, in order to transfer data to the specified address. Firstly I it possible this sort of transfer.

Help is highly appreciated Smilie,

Regards,
Vijay Manohar
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Config::Model::models::LCDd::CFontzPacket(3pm)		User Contributed Perl Documentation	    Config::Model::models::LCDd::CFontzPacket(3pm)

NAME
Config::Model::models::LCDd::CFontzPacket - Configuration class LCDd::CFontzPacket VERSION
version 2.021 DESCRIPTION
Configuration classes used by Config::Model generated from LCDd.conf Elements Model Select the LCD model Optional. Type enum. choice: '533', '631', '633', '635'. upstream_default: '633'. Device Select the output device to use Optional. Type uniline. upstream_default: '/dev/lcd'. Contrast Set the initial contrast Optional. Type integer. upstream_default: '560'. Brightness Set the initial brightness Optional. Type integer. upstream_default: '1000'. OffBrightness Set the initial off-brightness This value is used when the display is normally switched off in case LCDd is inactive. Optional. Type integer. upstream_default: '0'. Reboot Reinitialize the LCD's BIOS on driver start. Optional. Type enum. choice: 'yes', 'no'. upstream_default: 'no'. USB Enable the USB flag if the device is connected to an USB port. For serial ports leave it disabled. Optional. Type enum. choice: 'yes', 'no'. upstream_default: 'no'. OldFirmware Very old 633 firmware versions do not support partial screen updates using 'Send Data to LCD' command(31). For those devices it may be necessary to enable this flag. Optional. Type enum. choice: 'yes', 'no'. upstream_default: 'no'. Size Override the LCD size known for the selected model. Usually setting this value should not be necessary.Optional. Type uniline. default: '20x4'. Speed Override the default communication speed known for the selected model. Default value depends on model Optional. Type enum. choice: '19200', '115200'. SEE ALSO
o cme perl v5.14.2 2012-11-09 Config::Model::models::LCDd::CFontzPacket(3pm)