Subject:
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smooth PWM!!!!!!!!!!!!
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 22 Apr 1999 19:20:18 GMT
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Original-From:
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Michael <leahcim@pacific.net.sg#spamless#>
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Viewed:
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967 times
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hi everyone,
i like to ask something on the PWM of the handboard.
if i only do a command:
motor(2,50);
motor(3,50);
i will get a smooth PWM of 500 Hz of waveform.( -_-_-_-_ something like
this)
but if i implement the above command into a program with start_process
function,
i will get irregular waveform( -__-_-_--__-__--_- something like this )
and this affect my stepper motors badly.
when i check the waveform, i will get a addition delay of about 1-2 msec.
why is this so????
can anyone help????
by the way, my SCK/PD4 pin is faulty which if i set it as output and
bit_set it, i will get 5V. but if i bit_clear it, i will get 2.5V( i have
already poke the port ). i like to know if the 68hc11 chip is being
affected in any way?
regards,
Michael
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