Subject:
|
(no subject)
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Sun, 23 Feb 1997 21:53:48 GMT
|
Original-From:
|
lylehaze <AMIGAMAN@ERINET.nospamCOM>
|
Reply-To:
|
Lyle & Nicole Hazelwood <(amigaman@erinet.)nospam(com)>
|
Viewed:
|
1569 times
|
| |
|
|
I had considered doing -100 to 100 PWM in hardware. I even went so far as
to draw up the schematics for it... Then I read the HC11 manual, and
realized that instead of my "little" circuit, I could just use another
HC11.. The internal timer/counters could do the job easily, with very
little overhead. My thoughts then turned to making this "second" HC11 into
a navigation sub-processor, perhaps linked to the first with the SPI port.
Funny how a simple Idea can get so big, given a little thought..
Anyway, the code for 2 channels of PWM is in the manual, as is example code
for the SPI.. It seems easy enough, and both more powerful than the
discrete circuit, and smaller, too. Just my two cents.
In response to the last posting.. As I understand it.. the -100 to 100
control number is then "divided down" to the nearest of the 7 speeds
available.. If I have this wrong, PLEASE let me know!
Lyle Hazelwood <amigaman@erinet.com>
|
|
Message has 1 Reply:
 | | Re: Motor Speeds
|
| (...) Now this is starting to make sense. We use -100 to +100, but it does seem silly to have a resolution of 201. Much more logical that the routine converts to steps of lesser resolution, and 7 speeds certainly seem reasonable. (28 years ago, 23-Feb-97, to lugnet.robotics.handyboard)
|
3 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
