Subject:
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Re: Interfaced your Sonar with HB
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 22 Mar 2000 17:09:42 GMT
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Original-From:
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Kam Leang <kleang@eng.+spamless+utah.edu>
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Viewed:
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1109 times
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Hi Everyone!
It looks like Frankie Lai has found a way to interface the sonar I have on
my site to the HB. Here are his comments:
On Tue, 21 Mar 2000, Frankie Lai wrote:
> Hi, Kam Leang,
>
> I'm a student studying EE in HongKong Polytechnic University. My final year
> project is to build a hexapod, and I had tried to build a sonar based on
> your design, and trying to interfacing it to the HandyBoard.
>
> Now, I'm pleased to tell you that your circuit can be interfaced with HB
> easily just use the Polaroid driver provided in MIT site.
>
> Of course, a little bit modification is need, haha, very easy......
> 1..Connect the ping line to PD4.
> 2..Connect the echo line to A0 through a NOT gate. According to the driver,
> the echo signal should be "1" when detected.
>
> And I had successed in getting results, it is very sensitive.
> Thank you for your designs, I can save a lot of money now, haahaa.
hihi,
me again......I think you know already, but I would like to precise it.
The echo line through NOT gate is then connect to port A0, that is the
sensor input 7 on HB.
Thanks Frankie!
-kam
>
> Frankie Lai 97139371d@polyu.edu.hk
>
>
> ----- Original Message -----
> From: Kam Leang <kleang@eng.utah.edu>
> To: Frankie Lai <97139371d@polyu.edu.hk>
> Cc: <handyboard@media.mit.edu>
> Sent: Friday, March 17, 2000 7:35 AM
> Subject: Re: Non-polaroid Sonar
>
>
> > Hi Everyone!
> > If anyone gets the interface to work, I'd love to post it on my site along
> > with the appropriate references and credits. It would be neat if the
> > sensor works with the HB!
> >
> > Good luck!
> > -kam
> > http://www.leang.com/kam
> >
> > On Thu, 16 Mar 2000, Frankie Lai wrote:
> >
> > > Hi all,
> > > I'm now building the ultrasonic sensor from kam leang's page, did anyone
> > > interface it with handyboard?? Can anyone give me some advice on driving • it?
> > >
> > > thanks
> > > Frankie Lai 97139371d@polyu.edu.hk
> > >
> > >
> > > In lugnet.robotics.handyboard, Will Bain <willb@selway.umt.edu> writes:
> > > > Adam Oliver wrote:
> > > > > Just so I'm clear, ref pink book page 10-17.
> > > > > Does the "bit_set( 0x1021, 1 );" refer to bit 0 -EDG3B, and
> > > > > bit_clear( 0x1021, 2 ); " refer to bit 1 -EDG3A.
> > > > > This is what was throwing me, I always thought bits started at zero • and
> > > > > ended at 7, not 1 to 8 as appears to be the case here. Is this what • the
> > > > > "zero-indexed " means?
> > > > >
> > > > > sorry if it's a basic question, but if you don't ask you never learn • :-)
> > > >
> > > > No, that's a very good question. It had me confused, too. The second • argument
> > > to bit_set and bit_clear is not actually the index of a bit at all; it's • a bit
> > > mask.
> > > >
> > > > For example, when you do bit_set( 0x1021, 3 ), the 3 becomes 0000 0011 • in
> > > binary, so it will set the last two bits of the address. Hope this • helps!
> > > >
> > > > -- Will
> >
> >
> > ______ ______
> > --------------------------------------- |_ _| |_ _|
> > Kam Leang | |______| |______
> > University of Utah | |_ _| |_ _|
> > Department of Mechanical Engineering | | | | | | | |
> > MEB Room 2202 Salt Lake City, UT 84112 | |_|__|_| | | |
> > Tel.801.581.7105 Fax.801.585.9825 \ ___________/ | |
> > http://www.leang.com/kam | |______| |
> > ---------------------------------------------- \ ___________/
>
>
>
______ ______
--------------------------------------- |_ _| |_ _|
Kam Leang | |______| |______
University of Utah | |_ _| |_ _|
Department of Mechanical Engineering | | | | | | | |
MEB Room 2202 Salt Lake City, UT 84112 | |_|__|_| | | |
Tel.801.581.7105 Fax.801.585.9825 \ ___________/ | |
http://www.leang.com/kam | |______| |
---------------------------------------------- \ ___________/
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