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 Robotics / Handy Board / *6544 (-20)
  Any one have experence in robotic vision?
 
This really isnt a HB question but >>>> Have been reading a few vision books , thay all have formaulas and examples etc but none of them help you with actual code , my actual question is does any one have some example vision code in C or anything? (25 years ago, 2-Aug-99, to lugnet.robotics.handyboard)
 
  Noise on the handy board
 
Fred and handyboard experts, I have assembled two handyboards and I am now helping 15 other people build theirs at San Jose State University. I found a problem on the first two I build that I belive causes the Sharp GP2D02 not to work. The school (...) (25 years ago, 31-Jul-99, to lugnet.robotics.handyboard)
 
  Re: Millisecond timing
 
(...) See the Polaroid sonar code (from the HB web site) for an example of how to measure timing signals on the TIC3 channel. You initialize with: bit_set( 0x1009, 0x30 ); /* ddrd */ bit_set( 0x1021, 1 ); /* at tctl2, */ bit_clear( 0x1021, 2 ); /* (...) (25 years ago, 30-Jul-99, to lugnet.robotics.handyboard)
 
  Re: Millisecond timing
 
The clock speed on the Handy Board runs at 2 Mhz, which is plenty fast enough for most things IF you run the right code. IC, used in its C implementation is too slow to catch anything at 1 ms reliably. However, there are a few simple work arounds. (...) (25 years ago, 30-Jul-99, to lugnet.robotics.handyboard)
 
  Millisecond timing
 
I recently bought a Handy Board to use in acquiring time measurements varying by one millisecond. The Handy Board has a clock speed of 2kHz, therefore it should be able to measure down to one half millisecond. What I have found however is that the (...) (25 years ago, 30-Jul-99, to lugnet.robotics.handyboard)
 
  Can't bootstrap! & IR reflective sensors help
 
After assembling my own handyboard (ugh), and everything was (supposedly) solded OK, i tried to put the handyboard in bootstrap mode. But i get no results... i tested the stop button and it works fine (i compared with the OTHER handyboard i had)... (...) (25 years ago, 30-Jul-99, to lugnet.robotics.handyboard)
 
  Re: Reading Serial Port
 
David Boosalis <dboosalis@mail.arc.nasa.gov> moved upon the face of the 'Net and spake thusly: (...) "Use The Source, Luke". Check the source code of the downloader in the Unix port of Interactive C. (...) I think you want 9600, not 921kbaud (unless (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Re: Dead handyboard?
 
(...) Antistatic bags are conductive, right? You might have shorted the power to the ground via the bag itself, thereby killing your battery. Once a NiCad cell shorts, then it will can a large amount of current from a charger, possibly killing off a (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Dead handyboard?
 
My hb was working fine, I took it on a trip in an antistatic bag. When I took it out of the bag, the battery was completely drained. But as soon as I started to charge it, one of the resistors burned up. So I tried charging it via the interface (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Sharp GP2D12
 
Hi all, I want to use the GP2D12 distance measuring sensor with my handyboard. Does anybody know the pinout details for the three pins? Thanks, Thomas (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Sharp GP2D12
 
(25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Re: R: Reading Serial Port
 
also remember that at 9600 baud or higher, you may not see the flashing of the serial LEDs. try setting the baud rate to 300 or even 110 if you're doing visual-flash debugging. fred In your message you said: (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Re: Reading Serial Port
 
It isn't hanging, it's a blocking read until it recieves some specified number of characters. You can use a non blocking read by specifying O_NONBLOCK, in which case read() will return immediately. The Linux serial programming HOWTO is very good, I (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  R: Reading Serial Port
 
You can try Java comm API, under linux too. (If you want to use java ... :-) Stefano ---...--- | Da: David Boosalis <dboosalis@mail.arc.nasa.gov> | A: handyboard mailist <handyboard@media.mit.edu> | Oggetto: Reading Serial Port | Data: 29 July 1999 (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Reading Serial Port
 
This is not really a HB question, but I am hoping someone here has experience in it anyway. My question is in how do you read the Serial port under Linux. The Linux HOWTO's give an example, which I show below. What happens is that it hangs on the (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Serial line output
 
Just started to learn how to use my new HB. In going through the IC manual I could not find any routines for writing to the serial port. Does anybody have a good example on how to write "hello world" to the serial port, and have the attached (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
 
  Re: submersible, ballast, depth sensor
 
Hi all, Seeing notes about the sub and all, I thought I shall share some info. I know this list is purely for HB enthusiasts and forgive me if this does not interest you. The reason I got involved in HB was when I planned to use HB for a Aerial (...) (25 years ago, 28-Jul-99, to lugnet.robotics.handyboard)
 
  Linking HB with UART
 
Recently , i am trying to use HB as the controller for a Remote control project . However , i have yet to figure out how to make the HB take in a 8 bit digital signal from the UART?Is there any circuit require to execute the describe function? i am (...) (25 years ago, 28-Jul-99, to lugnet.robotics.handyboard)
 
  RE: submersible, ballast, depth sensor
 
There is a whole community of Radio Control submariners who have extensive experience that you could make use of. If you want it to act like a true submarine with diving planes etc. you should definitely use their knowledge base. It is much harder (...) (25 years ago, 28-Jul-99, to lugnet.robotics.handyboard)
 
  Re: submersible, ballast, depth sensor
 
(...) Yes. You missed the "with a hole at the bottom connected to the water" which means that water comes in as you move the air to the reservoir. And this means reducing the effective volume of the submersible but keeping its weight. Just the same (...) (25 years ago, 28-Jul-99, to lugnet.robotics.handyboard)


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