Re: Re: [ECOS] Downloaded image of Redboot Not Working

Re: Re: [ECOS] Downloaded image of Redboot Not Working

[Vikram Mehta]

Hi NavEcos

the baudrate I am using is 38400. THis is mentioned in the 
Docmentations.Earlier I had tried at 9600 which is what I have 
been using.
What baudrate shud I be using
And u have talked abt the cable connection. Kindly specify what 
type of Cable connection I should use.
I am using  the Cable sent along E7t. The cable specificaton given 
along is
"signal ground, Rx, and Tx. Rx, and Tx  not  crossed over
(that is, it must be a straight-through cable).  "



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Re: Re: [ECOS] Downloaded image of Redboot Not Working

[NavEcos]

On Saturday 26 October 2002 09:12 pm, Vikram Mehta wrote:
> Hi NavEcos
>
> the baudrate I am using is 38400. THis is mentioned in the
> Docmentations.Earlier I had tried at 9600 which is what I have
> been using.
> What baudrate shud I be using
> And u have talked abt the cable connection. Kindly specify what
> type of Cable connection I should use.
> I am using  the Cable sent along E7t. The cable specificaton given
> along is
> "signal ground, Rx, and Tx. Rx, and Tx  not  crossed over
> (that is, it must be a straight-through cable).  "

I am no expert, but from what it sounds like you either have a bad cable or 
the wrong baudrate.  I would simply try other baud rates with reboots in 
between.

I once had a case where a serial cable failed to work in my laptop when the 
laptop was running off from the battery.  Same sort of results.  With the 
wrong baud rate you'll get garbage characters, and with a cable that has a 
high impedance the same sort of thing can happen.

Of course, this may not be the problem at all, it's very difficult to debug a 
problem when you're not there, and I'm not.  If it were me, I'd hook up an 
oscilloscope if I had to and debug by reading the bits.  I'd also recompile 
the redboot code and make a modification to spit out a single character 
repeatedly.

-Rich

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