Hi,
I have read many different information, and do not have an osciloscope near.. so can anyone please help me clarify what is the unit of time expected in the period an pulse parameters of the PWM SetPulse method? Milliseconds? Microsendons? clock pulses?
Thank you very much,
Igor.
PWM SetPulse Parameters
Started by Igor Kondrasovas, Jan 11 2012 04:30 PM
5 replies to this topic
#1
Igor Kondrasovas
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#2
NeonMika / Markus VV.
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Posted 12 January 2012 - 05:20 PM
Hi,
I have read many different information, and do not have an osciloscope near.. so can anyone please help me clarify what is the unit of time expected in the period an pulse parameters of the PWM SetPulse method? Milliseconds? Microsendons? clock pulses?
AFAIK it is microseconds... I've read examples on servo driving where the servos needed a 20ms duration signal and to turn it to middle position it needed an "on-time" of 1,3 ms... it worked with the following command:
servoLen.SetPulse(20000, 1300);Greets, Markus
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#3
Philip
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Posted 13 January 2012 - 08:19 PM
AFAIK it is microseconds... I've read examples on servo driving where the servos needed a 20ms duration signal and to turn it to middle position it needed an "on-time" of 1,3 ms... it worked with the following command:
servoLen.SetPulse(20000, 1300);Greets, Markus
Yes this is correct - I did some measurement with a scope some time ago - results in my post at http://forums.netdui...ch__1#entry4323
Phil
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#4
gbreder
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Posted 14 January 2012 - 11:26 AM
AFAIK it is microseconds... I've read examples on servo driving where the servos needed a 20ms duration signal and to turn it to middle position it needed an "on-time" of 1,3 ms... it worked with the following command:
servoLen.SetPulse(20000, 1300);Greets, Markus
Sorry if this reply is a little bit outside the scope of the question. But I've an addition to Markus VV. answer:
Some servo have a value of 1,3ms other have 1,5ms as middle position...
Regards
Guido
#5
CaptainIffy
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Posted 07 March 2012 - 03:21 PM
SetPulse arguments seem to max out at 65535. After that the square wave flatlines. Is uint 16 bit on a Netduino or am I doing something silly? To be clear: I can't get setpulse() to generate output with a period greater than 66ms.
#6
Igor Kondrasovas
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Posted 20 July 2012 - 11:58 AM
SetPulse arguments seem to max out at 65535. After that the square wave flatlines. Is uint 16 bit on a Netduino or am I doing something silly? To be clear: I can't get setpulse() to generate output with a period greater than 66ms.
Hi Captainlffy,
Did you solve your problem? I was wondering about this and unfortunately this seems to be true. I believe the workaround should be using native code (C++).
Igor Kondrasovas
www.inovativatec.com
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