MultiWii

Has anyone tried MultiWii with UltraPWM as used by Xaircraft?

I plan to mount a MiniWii controller in my old X650 airframe, perhaps then it will handle like a real quad should.

XA UltraPWM ranges from 200ms to 1200ms, how do I change this in the code?

Thanks in advance


Sebastian.

assuming you have a quad:
in the file Output.pde,
in the section PROMINI, you have
OCR1A = motor[0]>>3; // pin 9
OCR1B = motor[1]>>3; // pin 10
OCR2A = motor[2]>>3; // pin 11
OCR2B = motor[3]>>3; // pin 3
basically, it converts a range [1000;2000] to [125;250]

just adapt it to convert the range [1000;2000] to [200x255/2000;1200x255/2000] = [25;153]

i have some ultrapwm escs and thought of just changing min and max throttle to 200 and 1200.
if the regulation works relative to the set min/max throttle range it should work. will test it.

sebastian, have you tried it successfully?

Alexinparis wrote:assuming you have a quad:
in the file Output.pde,
in the section PROMINI, you have
OCR1A = motor[0]>>3; // pin 9
OCR1B = motor[1]>>3; // pin 10
OCR2A = motor[2]>>3; // pin 11
OCR2B = motor[3]>>3; // pin 3
basically, it converts a range [1000;2000] to [125;250]

just adapt it to convert the range [1000;2000] to [200x255/2000;1200x255/2000] = [25;153]

could u explain that?
theres no way i could understand this codesection

the simple change of min and maxthrottle didnt worked.

Hi warthox,

you can do this changes in output.pde.

replace this


with this


it shoud change the output PWM range from 1000-2000 to 200-1200 for the promini. but with this mod, min and max trottle must stay at 1000 and 1850-2000 because it its now both -800

regards

felix

thanks felix
will try it this afternoon.

warthox wrote:thanks felix
will try it this afternoon.

Yes 3 weeks without a video !!! WHAT ARE YOU DOING ???

Bledi wrote:

warthox wrote:thanks felix
will try it this afternoon.

Yes 3 weeks without a video !!! WHAT ARE YOU DOING ???

im gettin old
no, seriously, there are many things im working at atm and also the weather is not the best for videos...
eg alex made a special code for me last year, this will be used soon

Is that the one that helps you keep it level and stable?

ronco wrote:Hi warthox,

you can do this changes in output.pde.

replace this

Code: Select all

  #if defined(PROMINI)
    #if (NUMBER_MOTOR > 0)
      #ifndef EXT_MOTOR_RANGE 
        OCR1A = motor[0]>>3; //  pin 9
      #else
        OCR1A = ((motor[0]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 1)
      #ifndef EXT_MOTOR_RANGE 
        OCR1B = motor[1]>>3; //  pin 10
      #else
        OCR1B = ((motor[1]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 2)
      #ifndef EXT_MOTOR_RANGE
        OCR2A = motor[2]>>3; //  pin 11
      #else
        OCR2A = ((motor[2]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 3)
      #ifndef EXT_MOTOR_RANGE
        OCR2B = motor[3]>>3; //  pin 3
      #else
        OCR2B = ((motor[3]>>2) - 250) + 2;
      #endif
    #endif

with this

Code: Select all

  #if defined(PROMINI)
    #if (NUMBER_MOTOR > 0)
      #ifndef EXT_MOTOR_RANGE 
        OCR1A = (motor[0]-800)>>3; //  pin 9
      #else
        OCR1A = ((motor[0]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 1)
      #ifndef EXT_MOTOR_RANGE 
        OCR1B = (motor[1]-800)>>3; //  pin 10
      #else
        OCR1B = ((motor[1]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 2)
      #ifndef EXT_MOTOR_RANGE
        OCR2A = (motor[2]-800)>>3; //  pin 11
      #else
        OCR2A = ((motor[2]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 3)
      #ifndef EXT_MOTOR_RANGE
        OCR2B = (motor[3]-800)>>3; //  pin 3
      #else
        OCR2B = ((motor[3]>>2) - 250) + 2;
      #endif
    #endif

it shoud change the output PWM range from 1000-2000 to 200-1200 for the promini. but with this mod, min and max trottle must stay at 1000 and 1850-2000 because it its now both -800

regards

felix

didnt work. the motor doesnt spin when board is disarmed, good.
but when i arm it and slide throttle stick from 0-100% its like the throttle range is present arround 3 times.
means: throttle stick from 0-30% - one complete throttle range of the board. a bit higher throttle stick set will cause motor stop and again a full throttle range from throttle stick range 30-60%. and again. pretty strange behavior.

warthox wrote:

ronco wrote:Hi warthox,

you can do this changes in output.pde.

replace this

Code: Select all

  #if defined(PROMINI)
    #if (NUMBER_MOTOR > 0)
      #ifndef EXT_MOTOR_RANGE 
        OCR1A = motor[0]>>3; //  pin 9
      #else
        OCR1A = ((motor[0]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 1)
      #ifndef EXT_MOTOR_RANGE 
        OCR1B = motor[1]>>3; //  pin 10
      #else
        OCR1B = ((motor[1]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 2)
      #ifndef EXT_MOTOR_RANGE
        OCR2A = motor[2]>>3; //  pin 11
      #else
        OCR2A = ((motor[2]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 3)
      #ifndef EXT_MOTOR_RANGE
        OCR2B = motor[3]>>3; //  pin 3
      #else
        OCR2B = ((motor[3]>>2) - 250) + 2;
      #endif
    #endif

with this

Code: Select all

  #if defined(PROMINI)
    #if (NUMBER_MOTOR > 0)
      #ifndef EXT_MOTOR_RANGE 
        OCR1A = (motor[0]-800)>>3; //  pin 9
      #else
        OCR1A = ((motor[0]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 1)
      #ifndef EXT_MOTOR_RANGE 
        OCR1B = (motor[1]-800)>>3; //  pin 10
      #else
        OCR1B = ((motor[1]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 2)
      #ifndef EXT_MOTOR_RANGE
        OCR2A = (motor[2]-800)>>3; //  pin 11
      #else
        OCR2A = ((motor[2]>>2) - 250) + 2;
      #endif
    #endif
    #if (NUMBER_MOTOR > 3)
      #ifndef EXT_MOTOR_RANGE
        OCR2B = (motor[3]-800)>>3; //  pin 3
      #else
        OCR2B = ((motor[3]>>2) - 250) + 2;
      #endif
    #endif

it shoud change the output PWM range from 1000-2000 to 200-1200 for the promini. but with this mod, min and max trottle must stay at 1000 and 1850-2000 because it its now both -800

regards

felix

didnt work. the motor doesnt spin when board is disarmed, good.
but when i arm it and slide throttle stick from 0-100% its like the throttle range is present arround 3 times.
means: throttle stick from 0-30% - one complete throttle range of the board. a bit higher throttle stick set will cause motor stop and again a full throttle range from throttle stick range 30-60%. and again. pretty strange behavior.

hmm... i will check the range on my oszi tomorrow .. but i dont know how this can happen .. maybe thay dont like 488hz?

regards felix

ronco wrote:hmm... i will check the range on my oszi tomorrow .. but i dont know how this can happen .. maybe thay dont like 488hz?
regards felix

they are advertised as ultrapwm 500hz escs.

Hi, I also hve xaircraft esc ultrapwm. I managed to change the scale, but on startup motor spin really fast, as it was send a command to it. Is this normal? else it seems to work, but this way is unusable (too dangerous).

Hello.
Try this for MultiWii 1.9:
http://translate.google.ru/translate?hl ... ost3180670
Sorry for google translate (i have some trouble with English)