Subject:
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Re: Handy Board Problem: getting hb back into download mode
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 19 May 1997 20:15:16 GMT
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Original-From:
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Robert -Bob- Campanini <rcampani@eecs.ukans.edu{AntiSpam}>
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Viewed:
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1796 times
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Hello,
I'm at a loss for what will take to get either of the two boards into DL
mode.
The board has nothing plugged into it; the BATT and PWR LEDs flash on and
then PWR remains on so I can not confirm the synptoms of the ds1233(U12)
voltage monitor failure you suggested below.
Since .s19 goes into external RAM I won't try placing the HC11 chip into
any other type of board. Are there any other 'brute force' methods
(removing battery power, removing the external RAM from its socket to
allow decay of values) or PCB test points that I could probe with a volt
meter or scope.
I haven't found this problem in the FAQ list nor seen it in the short time
I've been on the HB mailing list.
Thanks,
Bob
On Tue, 13 May 1997, Fred G. Martin wrote:
> > persuing another tack of placing the HC11 chip into the socket of a
> > different Evaluation Board in the hopes of downloading .s19 there and
> > then putting it back into the hb socket. I'll let you know what happens
>
> this won't work!! the .s19 file goes into the external RAM chip on the
> hb, NOT the 'hc11.
>
> pls check that you can or cannot get into DL mode when the board is
> NOT plugged into anthing. DL mode is when BATT and PWR LEDs flash on,
> then both off upon power-on.
>
> -fred
>
>
>
> > The red BATT LED was off so I can not confirm the symptoms. It will be
> > Thursday am before I get to work on confirming the symptoms before
> > on Thurs.
> > Bob.
> >
> > On Mon, 12 May 1997, Fred G. Martin wrote:
> >
> > > you may have damaged the ds1233 chip. confirming symptoms:
> > >
> > > 1. the red BATT LED stays on.
> > > 2. measure system voltage (+5v to gnd); e.g., at a sensor header, and
> > > get 4.9 to 5.1 v.
> > >
> > > if these two tests are true, remove u12 (the ds1233-10) and see if you
> > > can successfully download the runtime .s19 file. if so, it's pretty
> > > conclusive that the ds1233 is bad.
> > >
> > > when running the board w/o the ds1233, the memory won't reliably hold
> > > its contents between power cycles, but otherwise things should work.
> > >
> > > -fred
> >
> >
> >
> > Robert - Bob - Campanini
> > 913/843-6412
> > 2706 University Drive
> > Lawrence, KS, 66049
> >
> > http:/www.eecs.ukans.edu/~rcampani
> > **************************************
> >
> >
>
Robert - Bob - Campanini
913/843-6412
2706 University Drive
Lawrence, KS, 66049
http:/www.eecs.ukans.edu/~rcampani
**************************************
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