Subject:
|
Questions, questions, questions......
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Wed, 10 Jul 1996 07:12:43 GMT
|
Original-From:
|
Scott Seaton - CMC Engineer <[Scott.Seaton@Aus.Sun]saynotospam[.COM]>
|
Viewed:
|
1736 times
|
| |
|
|
Hi
I've just built my first HandyBoard (thanks for the great service Prabal), and
have a few questions (that I can't find in the FAQ).
What are the hardware-imposed software differences between the HandyBoard and
the 6.270/Rug Warrior boards ? ie it looks like the Rug Warrior motors are
controlled directly by Port A lines. Are these outputs configured as digital
I/O or are they still under the control of the timer subsystem ? (I think that
the 6.270 board is setup in a similar way, but I don't have the schematics on
hand to check.) If the 6.270/Rug Warrior board does use the Port A timer
interrupt lines to do PWM, does this mean that the available motor power levels
on the 6.270/Rug Warrior board has finer granularity than the 8 speeds on the
HandyBoard ? (I'm trying to port the Rug Warrior code from the Mobile Robots
book to my HandyBoard....)
I'd also like to add some extra I/O to the HandyBoard, does anyone (ie Fred)
have exact measurements for the distances between pin 1 on the following
connectors ?
J8 J13 J3 U4
ie
U4 J3
+ooooooooooooo +ooooooooo
<--------------> ^
??? |
| ???
??? |
<------------------> |
oooo ooo+ +
J13 J8
And my final question...
Where do I plug in an RC servo ? From the look of the servo.asm code shipped
with the beta version of IC 3.1 it looks like PA7 (J2 pin 9) is used by the
servo code, is this correct ? Has anyone tried hacking IC to use TOC3
(available on the expansion connector - J3) as a servo output ? I know that
it's possible to use the beeper TOC instead, but it looks like TOC3 isn't being
used on a standard HandyBoard.
Thanks
Scott Seaton
===============================================================================
,-_|\ Call Management Centre Engineer Internet : scott.seaton@aus.sun.com
/ \ Sun Microsystems Australia Pty Ltd Support : 1800 024 417
\_,-\_+ 828 Pacific Highway Phone : +61 2 844 5381
v Gordon, N.S.W., 2072, AUSTRALIA Fax : +61 2 418 2018
===============================================================================
|
|
Message has 1 Reply:
 | | Re: Questions, questions, questions......
|
| (...) The Handy is like the 6.270; both have dig out latches going to the motors. The RW drives the motor ctrl pins directly. A re-write of the system PWM routines could provide finer than 8 levels of control, even w/o needing HW timer lines. (...) (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
|
2 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
