Getpwm Returning "0"

Kiteman

United Kingdom

Asked Sep 2016 — Edited Sep 2016

Resolved by DJ Sures!

I want to return the value from D1 and D0 whilst tracking an object, i'm using the GetPWM command but only ever get a "0" returned. Am i missing something?

`Code:`


ControlCommand("Camera", CameraColorTrackingEnable)

:TrackingLoop

$head0=GetPWM( D0 ) 
$head1=GetPWM( D1 ) 
print($head0)
print($head1)

sleep(1000)

Goto(TrackingLoop)

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ptp

PRO

USA

#1 Sep 2016

you are using the wrong function, replace GetPWM with GetDigital.

Quote:

GetPWM (digitalPort)
Gets the PWM (Pulse Width Modulation) of specified port
PWM is between 0 and 100

Quote:

GetDigital( Port )
Returns the Digital value of the specified port as a 0 or 1

GetPWM returns the last value used with a PWM function.

ex:

Code:

PWM(D0, 75)
PWM(D1, 100)
Print(GetPWM(D0)) => 75
Print(GetPWM(D1)) => 100

DJ Sures

PRO

Synthiam

#2 Sep 2016

I believe you are attempting to determine the position of a servo? If that is the case, use GetServo(). As stated by @ptp, the GetPWM is reserved for PWM specific functions, which is identified by its naming convention PWM vs SERVO.

Find out how a servo works from the learn section here: http://www.ez-robot.com/Tutorials/Lesson/48?courseId=6

Additionally, there are dozens of variables for the camera control - which you can view by looking at the Variable Tab while editing. More information on editing EZ-Script can be found in the learn section here: http://www.ez-robot.com/Tutorials/Course/6

Camera variables can help to determine the physical location of the object on the screen.

However, if you are looking to read a servo position, use GetServo(). The JD project which you are building from has some script examples that demonstrate, such as PointAndTrack