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DeveloperPermalink Reply by jasonshort on October 3, 2011 at 10:38am

Yeah, that's "Instant PWM" kicking in.

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Permalink Reply by DaveyWaveyBunsenBurner on October 3, 2011 at 11:19am

Jason,

Could you tell us a bit more about the ESC update rate? I know the code loop speeds but not how fast the ESC update rate. Is it basically Turbo PWM or is that specifically different?

Thanks!!

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Permalink Reply by Sebastian Gralla on October 3, 2011 at 3:24pm

the update rate are the same as the loop speed (each cycle, one update)

so you get a signal every run

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Permalink Reply by Angelo Rossi on October 3, 2011 at 11:37am

Instant PWM? Oscilloscope correctly captured the signal with a variable frequency. Are the ESC capable of decoding such signal?

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Permalink Reply by Sebastian Gralla on October 3, 2011 at 3:23pm

as we all see, yes, they are :D

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Permalink Reply by DaveyWaveyBunsenBurner on October 3, 2011 at 4:53pm

ESCs dont typically use a clock pulse for sync so can take any frequency upto (i believe) 450hz ish. After that the 2ms maximum pulse width begins to blend into a constant high.

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Permalink Reply by Edwin Hayes on October 10, 2011 at 7:40pm

(Having looked at the implementation in APM_RC.cpp) Why isn't the timer/counter's 'TOP' value just reduced to 5000 rather than having that 'Force_Out0_Out1' jazz?  Manipulating the timer/counter register to 'skip' over part of the timing seems unnecessary and terrifying.

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