Subject:
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D0 - D7
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 2 Mar 1997 02:09:13 GMT
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Original-From:
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MAR ERICSON <MAR@ihatespamCOOPER.EDU>
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Viewed:
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2203 times
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I was poking about the HB with an osciloscope and ran into a bit of
confusion. I had the motor outputs ON and wanted to see the PWM effect. I
was able to see the square waves but...when I poked "behind" the octal
latch to see what's going on with D0-D7, I got something I don't really
understand. I got mostly a line at 5V and one at 0V. Setting the
osciloscope to it's 100MHz max, I got what resembled a bunch of
underdamped square waves overlapping eachother! Since the HC11 runs at
2MHz, I don't understand why this is happening or know whether I'm getting
results that mean anything. Can someone explain what's happening?
Thanks! :)
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ericson mar
Master of Engineering Candidate
Project: Mobile Robotics
mar@cooper.edu
Department of Mechanical Engineering
The Cooper Union for the Advancement of Science and Art
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