Subject:
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Re: serial interface trouble
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 13 Jan 1999 17:12:06 GMT
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Original-From:
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Will Bain <willbain@=AvoidSpam=cs.umt.edu>
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Viewed:
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974 times
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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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Message is in Reply To:
 | | (no subject)
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| Dear Friends, We, at VESIT ,Bombay,India are making a rover which is capable of navigating itself and avoiding obstacles.For this,we are using the handy board.The soldering work has been completed and we are now trying to use 'download software' (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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