Quadrature Encoders

giambo95

Hi everyone, I'm trying to figure out what is a basic code to test if the 36-position encoders I ordered from parallax work. However since i'm fairly new to coding, i'm struggling to understand how to do it. Anyone can help? Im using the green board of education.

Thanks

microcontrolleruser

Hi

What you have is part of the Arlo robot.

Here is a linkto the robot.

You have to look in documentation for robot to find some code you can adapt.

https://www.parallax.com/news/2016-05-05/introducing-arlo-complete-robot-system-take-project-based-learning-next-stage-robot

Mickster

This is PropBasic but it's self-explanatory and shows how the decode logic actually works.

Chan_A and Chan_B are constants for the inputs.

Just ignore the Wrlong stuff.

'Decide where to start
If Chan_A = 1 And
    Chan_B = 1 Then
    Goto A1B1
Endif

If Chan_A = 0 And
    Chan_B = 0 Then
    Goto A0B0
Endif

If Chan_A = 1 And
    Chan_B = 0 Then
    Goto A1B0
Endif

If Chan_A = 0 And
    Chan_B = 1 Then
    Goto A0B1
Endif

'Keep hopping between these labels 
  
 A1B1:
 If Chan_A = 0 Then
   Dec Counter
   Wrlong HubCTR,Counter
   Goto A0B1
 Elseif Chan_B = 0 Then
   Inc Counter
   Wrlong HubCTR,Counter
   Goto A1B0
 Endif
 Goto A1B1
 
 A0B0:
 If Chan_A = 1 Then
   Dec Counter
   Wrlong HubCTR,Counter
   Goto A1B0
 Elseif Chan_B = 1 Then
   Inc Counter
   Wrlong HubCTR,Counter
   Goto A0B1
 Endif
 Goto A0B0
 
 A1B0:
 If Chan_A = 0 Then
   Inc Counter
   Wrlong HubCTR,Counter
   Goto A0B0
 Elseif Chan_B = 1 Then
   Dec Counter
   Wrlong HubCTR,Counter
   Goto A1B1
 Endif
 Goto A1B0
 
 A0B1:
 If Chan_A = 1 Then
   Inc Counter
   Wrlong HubCTR,Counter
   Goto A1B1
 Elseif Chan_B = 0 Then
   Dec Counter
   Wrlong HubCTR,Counter
   Goto A0B0
 Endif
 Goto A0B1
End

tomcrawford

search "quadrature". There is tons of stuff on the forum.