Re: [uCsimm] new subscriber

From: John J. Cruz (casacruz@bellatlantic.net)
Date: Thu Mar 29 2001 - 19:25:47 EST


Ian,

Thank you very much for the information, most helpful.

jjc

Ian Leonard wrote:

> On 2001.03.28 16:05:14 +0100 John J. Cruz wrote:
> > uCsimm user group,
> >
> > I'm a new subscriber to this mailing list. I was a user of Motorola's
> > 68HC11. Simple microcontroller when compared to the 68EZ328
>
> Likewise.
>
> > DragonBall. The big advantage is the uClinux OS. I can only conjecture
> > on how to use uClinux with the uCsimm.
> >
> > That is during developing my Linux workstation (Red Hat 6.2) would be
> > connected to the uCsimm via its RS232 port. But:
> >
> > What environment do I install in the workstation?
>
> When you say environment, do you mean gnome or KDE? If so it doesn't
> matter.
>
> > Do I code in C, compile (gcc?), and then download into the uCsimm?
>
> You can, but I have one xterm logged in to the uCsimm (serial or
> telnet). The ucsimm has your development directory mounted over
> nfs. This means that you can cross compile your code on your
> workstation and then run it from the other xterm. I don't know
> if that explains it well so:
>
> xterm 1. Use minicom or telnet to login to the uCsimm. Mount your
> work stations development directory, cd to it and run you programs
> from the workstation.
>
> xterm 2. Change to your development directory and cross compile your
> programs
>
> > How does uClinux (in uCsimm) execute this new download program?
>
> If you do as I indicate, you don't download it at all. When you
> want to run a system without the network connection, you copy your
> programs into an image of the filesystem, run a script that builds
> a complete image for the flash and download that.
>
> > Any DragonBall simulators?
>
> I don't think you need one.
>
> > What does the uCLinux CD-ROM from Lineo have that might answer some of
> > the questions above?
>
> Nearly everything. You can be up and running in an hour or so.
>
> > The $300 kit by Lineo includes a host card. Is this card were the
> > uCsimm mounts on (after assembly)? The kid does not seem to contain a
> > power “brick”. Is this extra?
>
> You need a regulated 4.5 - 6v supply.
>
> > If I'm not mistaken, the RS 232 interface requires plus and minus
> > voltages between 5vdc and 12vdc. The regulator included in the kit
> > mention above I believe is only a positive linear regulator. How is the
> > negative voltage achieved? (From the Linux workstation RS232 port plus &
> > minus pins?))
>
> Don't know, but it works. I just do the software. I could ask the hardware
> guy here, but then I would have to admit that I don't really know what's
> going on.
>
> --
> Ian Leonard
> eMail: ileonard@ntlworld.com
> Phone: +44 (0)1865 765273 Fax: +44 (0)1865 765280
>
> Please ignore spelling and punctuation - I did.
> This message resent by the ucsimm@uclinux.com list server http://www.uClinux.com/

This message resent by the ucsimm@uclinux.com list server http://www.uClinux.com/



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