Re: [uCsimm] ucsimm display &keboard problem

From: iMAXSZ engineering (imaxsz@szonline.net)
Date: Tue May 23 2000 - 22:30:37 EDT


    Actually we'll implement a keymatrix with a PIC and sent interrupts to
uCsimm to implement a keyboard driver.
    Regarding display, is that the file /linux/driver/char/tty_io.c is to
be modified? I've tried some value but no success.

----- Original Message -----
From: Glenn West <gwest@krdl.org.sg>
To: <ucsimm@uClinux.com>
Sent: Wednesday, May 24, 2000 7:22 AM
Subject: Re: [uCsimm] ucsimm display &keboard problem

> There are chips (Check circuit cellar magazine or web size) that will
> allow you to convert a PC keyboard to serial.
>
> As far as the display, a "console driver" will need to be written.
> There already code that allows text. Put it as a background process, set
> up a "pseudo" console device, really looks like a char unix device, and
> redirect the text output to the background process to display on the LCD.
> Make sure you have enough "buffer" space such that the initial kernel text
> output can be "captured" if you want this. Otherwise, you throw it away,
> or redirect it till you ready for the switch. There's bits and pieces of
this
> in desktop linux that you can pervert, and then you can also use the
existing
> standalone code as well.
>
> Done this kinda thing quite a few times, so it is doable.
>
> At 11:22 PM 5/23/00, you wrote:
> > > iMAXSZ engineering wrote:
> > >
> > > Hi: all
> > >
> > > I connect my 1 bit 480 *64 LCD to ucsimm module, now the LCD can
> > > dispaly char correctly. but I have some problem
> > > that I can't solve.
> > >
> > > 1. How to make all message that ucsimm display on pc screen display
> > > on my LCD? for example: etc/issue content is
> > > dispayed on pc screen when we boot uClinux, now I want to make the
> > > etc/issue content dispaly my LCD.shoul I how to
> > > do ?
> >
> >
> >The LCD is an additional piece of hardware that simply exists in the
> >system, it is not an essential part of the system in any way. There is
> >no support for an LCD display from within uClinux, OTHER THAN the fact
> >that you can build an application that runs under uClinux and changes
> >the data within the LCD framebuffer.
> >
> >With all that being said, you probably could integrate the LCD into the
> >uClinux as an essential part of the system, such as being the system
> >console, but no code that I am aware of has been written, as yet, to do
> >this...
> >
> >
> > >
> > > 2.Could the ucsimm use keyboard directly ? if not , should I how to
> > > do?
> >
> >Sure, you can put a matrix keyboard on it. If you mean a PC/AT style of
> >keyboard, then you will need an external controller to speak to the PC
> >keyboard and have it pass the key data back to the 68EZ328 processor.
> >
> >
> >Regards,
> >
> >TomW
> >
> >
> >
> >--
> >Tom Walsh - WN3L - Embedded Systems Consultant
> >'www.openhardware.net', 'www.cyberiansoftware.com'
> >"Windows? No thanks, I have work to do..."
> >This message resent by the ucsimm@uclinux.com list server
> >http://www.uClinux.com/
>
> This message resent by the ucsimm@uclinux.com list server
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>

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