Making a pwm almost endless loop

Ady111 · 2011-07-10 15:12

Mike G wrote: »
Ady111, all PULSOUT commands have to execute in the same tight loop. You should not nest a FOR...NEXT loop in your tight loop.

Here's a simple example. Do not use this with your motors as it uses the DEBUG command and a 1 second pause. At some point you'll also need to update speed/position values and that takes time as well.
' {$STAMP BS2p}
' {$PBASIC 2.5}

i     VAR   Byte  ' For next loop
m1    VAR   Word  ' Motor 1
m2    VAR   Word  ' Motor 2
m3    VAR   Word  ' Motor 3
cnt   VAR   Nib   ' Conter
dir   VAR   Bit   ' Direction

'Initialize
m1 = 650
m2 = 700
m3 = 200
dir = 0

' Main loop
Main:
  PULSOUT 8, m1
  PULSOUT 1, m2
  PULSOUT 2, m3

  GOSUB LoadValues
  PAUSE 10

  GOSUB Display
GOTO Main

' Load new speed/position values
LoadValues:
  IF dir THEN
    m1 = m1 + 1
    m2 = m2 + 1
    m3 = m3 + 1
  ELSE
    m1 = m1 - 1
    m2 = m2 - 1
    m3 = m3 - 1
  ENDIF

  cnt = cnt + 1
  IF cnt = 15 THEN dir = dir + 1
RETURN

' Dump values for testing loop
Display:
  DEBUG ?m1, ?m2, ?m3, ?cnt, ?dir
  PAUSE 1000
  DEBUG CLS
RETURN
Good luck... I'd pick up a PWM controller.

I'm not sure that's the way i should make it work. I want to try and make a simple program. If you have seen the picture that i inserted in #18 you can make a better idea about my project. Tomorrow must be ready. i want to make a series of FORs so that the program goes from loop to loop until reaches the end. I want just to make the hover to go forward for a time, right and left that's all, of course without the interruption of the brushless motor.

Making a pwm almost endless loop

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