Using Servo Block with Simulink IO

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Jeff Dillon
Jeff Dillon 2019-7-29
评论： Jeff Dillon 2020-4-1
Simulink IO currently supports the PWM output block in Normal mode, but I need to control a servo. The PWM output is at 1Khz, but a servo typically uses 50Hz. Is there any way to change the PWM frequency? My servos don't recogize 1Khz. I'm currently using a second Arduino to down convert 1Khz PWM to 50 Hz, but of course slows down the real time simulation.

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回答（1 个）

Arun Kumar
Arun Kumar 2019-9-25
Hi Jeff,
With Simulink IO, it is not possible to change the PWM frequency.
But for changing PWM frequency in external mode or deploy to hardware, there is a workaroud.
https://in.mathworks.com/matlabcentral/fileexchange/62702-rensselaer-arduino-support-package-library-rasplib
Use this Simulink library to change frequency on Arduino AVR boards. Note that this workaround will not work for Arduino ARM boards like Due/MKR1000.
Request for supporting variable PWM frequnecy on arduino is under consideration.
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Arun Kumar
Arun Kumar 2020-3-31
Hi Jeff,
The feature is available in R2020a.
Jeff Dillon
Jeff Dillon 2020-4-1
Thank you! I downloaded 2020a and see the new frequency parameter for the PWM block, very nice.

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