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Posted by Joe McKibben on October 18, 2007, 3:49 pm
> Jon Hylands wrote:
> > wrote:
> >> There are a couple books that have been written about using PDAs in
> >> robots. I have two of them and I think one is called PDA robotics. I
> >> can't remember how exactly they did it, if they used the usb port or
> >> not. I will have to look it up later.
> > MicroSeeker used to use a Dell Axim PDA running Squeak, talking to a PIC
> > microcontroller. I used a 19,200 baud serial link (RS-232) between them.
> > Right now, I'm using a gumstix verdex (which has host USB) running Squeak
> > to talk through an FT232 USB transceiver chip to an ATmega168 at 1.0 Mbps.
> > In Squeak I open the USB port as though it was a serial port, and
> > everything works great.
> Jon:
> Your experience is not matching mine.
> I am only having so-so success with my FTDI USB-to-RS232 serial
> converter. I need to do some more research, but it looks
> like there is some serious overhead in the USB protocol stack
> that adds some significant delays. I am running at 115200
> and I am getting pathetic performance. My commands are really
> short -- send one or two bytes and get 1-3 bytes in return.
> I need to do some more sluething to verify that it is some
> stupid software bug tho'.
> In a week or two I hope to have some more solid numbers as to
> what is really happening. (I need to order some more parts.)
> -Wayne
The other book I have is The Ultimate Palm Robot. It seems to give the
same type of setup as PDA Robotics does.
Yeah Acroname's PPRK robot used to have a kit that hooked up to a PDA
through there brainstem controller.
Joe McKibben
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> robots. I have two of them and I think one is called PDA robotics. I
> can't remember how exactly they did it, if they used the usb port or
> not. I will have to look it up later.