| Posted: 11:56am 23 Nov 2025 |
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I am reading the manual... but obviously missing something
SERVO 1.bas
' Program to run a servo on a PICO 2040
' Servo Signal = GP8
' From the manual page 154...
' ------------------------------------------------------------------
' As with the PWM command the pins must be set up with SETPIN n,PWM
' ------------------------------------------------------------------
SetPin GP8, PWM
' ------------------------------------------------------------------
' From the manual: SERVO channel [positionA][,positionB]
' Looking at the RP2350 chart (There is none for the 2040) it seems
' that GP8 is Channel 4A. I have a continuous turn servo connected to
' GP8. If the range is -120 to +120, then 0 should be center or STOP
' for a continuous turn.
Print "Start"
Servo 4, 0
Pause 2000
PWM 4, OFF
Print "STOP"
END
I would expect the continuous rotation servo to be at or near center... but it takes off spinning hard.
If I change the line to
SERVO 4,-100
To get a different motion, it fails...
[17] Servo 4, -100
Error : Syntax
>
If I attempt to use a variable...
' Program to run a servo on a PICO 2040
' Servo Signal = GP8
' From the manual page 154...
' ------------------------------------------------------------------
' As with the PWM command the pins must be set up with SETPIN n,PWM
' ------------------------------------------------------------------
SetPin GP8, PWM
' ------------------------------------------------------------------
' From the manual: SERVO channel [positionA][,positionB]
' Looking at the RP2350 chart (There is none for the 2040) it seems
' that GP8 is Channel 4A. I have a continuous turn servo connected to
' GP8. If the range is -120 to +120, then 0 should be center or STOP
' for a continuous turn.
Print "Start"
For X = -120 to 120
Servo 4, x
Pause 2000
Next x
PWM 4, OFF
Print "STOP"
END
It also fails with a SYNTAX ERROR.
I'm starting to think the SERVO command is broken.
Has anyone else had any luck with it? |
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