Re: [Lcd-linux] state of this project / effort to get into mainline linux
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From: Mattia Jona-L. <mat...@gm...> - 2014-10-07 15:36:13
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Hi, finally the project never went into the mainline kernel and lived parallel but outside the kernel sources. The project is not dead and chances are that the last release of LCD-Linux still compiles and works with a recent kernel with little or no modification. The project is however old and technologically outdated. Parallel ports are no longer available on modern computers and one would have at least to adapt the code dealing with the parallel port to the GPIO interface, which is doable and not difficult. Also, the idea of LCD-Linux was to write an optimized driver for alphanumeric displays including terminal emulation. Only the HD44780 driver was written and developed but other drivers could be developed with little effort because basically you only need to write the elementary functions of how to write a single character on the particular display and how to open the communication channel between computer and display. The problem of what to display where has already been solved once and for all. To my knowledge there is no modern replacement of LCD-Linux. LCDproc is a userspace program that gathers information from the system and displays it on an LCD. It supports lots of displays but as far as I know there is no simple way to make it display some user generated input. Another program is LCD4Linux, which by the way supports LCD-Linux among the possible connection types, which features a sort of LCD-Linux emulation since one can open a FIFO special file and everything written on the FIFO is output on the LCD. Still no terminal emulation though. LCDProc should still be alive. The status of LCD4Linux is unknown to me. Try to identify the controller of your display and find the correspondent datasheet. Then you can decide whether lcd-linux suits your needs. Best, Mattia On Tue, Oct 7, 2014 at 4:33 PM, <ha...@cc...> wrote: > Hi, > > I see that about 4 years ago there was a effort to get lcd-linux into > the mainline kernel. What became of this? > > Is this project still alive and useful or has it been obsoleted by > something new? > > My reason for looking into lcd-linux is that I want to write a driver > for a 1x9 14-segment display, but am unsure where such a driver belongs. > > Do you have any advice about handling alphanumeric lcd displays from > linux? > > TIA, > Harald > > ------------------------------------------------------------------------------ > Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer > Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports > Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper > Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer > http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk > _______________________________________________ > Lcd-linux-users mailing list > Lcd...@li... > https://lists.sourceforge.net/lists/listinfo/lcd-linux-users |