Subject:
|
Poloroid Sonar driver
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Fri, 19 Dec 1997 20:34:51 GMT
|
Original-From:
|
John Duff <jnduff@cland.net%Spamcake%>
|
Viewed:
|
387 times
|
| |
|
|
I got around to changing to the new driver and hardware configuration
last night. Afterwards, I found that the sonar was returning negative
distances periodically. Here is my interpretation, but I'm probably
wrong. Peekword returns a signed integer. If start_time occurs between
counts $8000 and $FFFF of TCNT , the difference between tic3 and
start_time will be negative and/or inaccurate. It appears possible for a
negative value to escape the while loop check in sonar_sample(), if this
function is not being serviced at the time the echo returns.
What am I missing? Thanks
|
|
1 Message in This Thread:
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
