Subject:
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Help
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 14 Jan 1999 01:02:10 GMT
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Original-From:
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madstheworld <MILIND23@VSNL.COMnomorespam>
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Viewed:
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877 times
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thank you for the apt and quick reply. if you could tell us what is the
difference between a straight through cable and a null modem cable it would
be great( we are using a 25 female to 25 female connector) and how to
identify the difference between the RJ11 telephone and network cable. We
have checked the cable and it looks to be a 4 wire telephone cable since I
removed it from my telephone directly. Also, the handy board once connected
receives power form the charger board but does not enter BOOTSTRAP MODE. The
PWR and BATT led do not go on and off. But the yellow CHARGE LED on the
interface board keeps on switching if the hb is connected and then lights up
constantly when the STOP switch is pressed. Since, the bootstrap
configuration is not confirmed we cannot download the program: but on trying
the downloader it gives ERROR which might be due to cable fault as suggested
earlier.
Please help debug
thank you
-milind
-----Original Message-----
From: Will Bain <willbain@cs.umt.edu>
To: Handyboard Mailing List <handyboard@media.mit.edu>
Date: Wednesday, January 13, 1999 10:46 PM
Subject: Re: serial interface trouble
> SHETTI.NITIN.MANGESH wrote:
> <snip>
> > In the handy board assembly manual it has been said that
> > inorder to check the charger/interfacing circuit, connect only the that
> > circuit(charger/interfacer) without the handy board to the host computer
> > using a appropriate modem cable (RS232).Then the charger/interface board
> > has to be powered causing the red LED(PWR) to glow. Next,the download
> > software has to be run. At this stage the green LED on the board should
> > glow up indicating transmission of data (or readiness to transmit • data).We
> > are finding that the green LED(SER) does not glow in our circuit.(please
> > refer to section 3.3.2 of the hba.pdf file for more explanation)
> > We are therefore unable to find whether this particular board
> > is working and hence we cannot risk connecting the handy board to the
> > charger/interfacer board.
>
> The most common problems seem to be with the types of cables and the
> serial port settings. Make sure that you are using a straight through
> cable (not a null modem cable) to connect the HB to the serial port, and
> make sure that you have a telephone style RJ11 cable (not a network
> style RJ11 cable) to connect the serial interface board to the HB.
>
> Also, try to verify that your serial port is working properly. If you
> have multiple serial ports, try it on different ones (I had success with
> one port, but not the other). The following settings are ones that work
> with my HB.
>
> Bits per second: 9600
> Data bits: 8
> Parity: none
> Stop bits: 1
> Flow control: Xon/Xoff
>
> You say that you haven't yet tried connecting the HB to the serial
> interface board. Perhaps others on the mailing list can address whether
> it would be too risky to simply try hooking up the HB at this point and
> testing the whole system (despite the fact that the serial interface
> board may not be working properly yet). Since I'm not very smart about
> electronics, I would probably just plug it all in and see if it smokes!
> ;-)
>
> Good luck.
>
> -- Will
> , ,
> __@_/ \_@__ |/
> | /__, o @_/
> )\ ) ( \ (\/\\,
> ~~~~~~~~~ ' ` ~~~~~~~~~~~ ` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Wendy Parson, The fellow who agrees with everything you say
> Will Bain, is either a fool or he is getting ready
> & Tatoosh to skin you. --Kin Hubbard
>
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