MATLAB: How could i generate PWM Signal using dsPIC33EP512MU810 microcontroller

electric_motor_controlgenerate pwm signalpower_conversion_controlpower_electronics_control

 I have mplab simulink block set but not enough resources.i want to make 24 pwm signal using microcontroller. My microcontroller is dsPIC33EP512MU810 main problem is that there is not enough info to how to make PWM. Could any one give me some soln or some resources that will be very helpful for me and also very kind of you. Thanks in advance.

Best Answer

Hi Mohammad,

You can refer to this link that points you to the tutorials that might explain you about generating the pwm signal using the Microcontroller.

Thanks,

Udaya.

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MATLAB: Does MATLAB support the Arduino Zero microcontroller

Anything not listed is not supported. In some cases the unsupported ones will be outright rejected; in other cases it might work. If you are trying to use Simulink to generate for a target that is a Zero then it will be rejected.

MATLAB: Variable ‘ep3’ is undefined on some execution paths.

The message "undefined on some execution paths" means, that there is a possible combination of IF-branches, in which the variable is not defined anywhere. The solution is to create a default value before the IF branchs. This oul simplify your code massively in addition.

Replace:

 if e3<=x0pb && e3>0
   ep3=1*max(0,exp(-(e3-x0pb)^2/0.16))
 else
    if e3 <=0
       ep3=0;
    else  
        if e3 >x0pb
           ep3=1*max(0,1)
        end 
    end
 end

ep3 = 0;
if e3 <= x0pb && e3 > 0
   ep3 = 1 * max(0, exp(-(e3 - x0pb)^2 / 0.16));  % "1*" ?!?
elseif e3 > x0pb
   ep3 = 1;   % "1*max(0,1)" ?!?
end

The other parts can be simplified also in an equivalent way. E.g.:

if de3<=x0z && de3>x0nb
   edotz3=1*max(0,exp(-(de3-x0z)^2/0.16));
else
    if de3>=x0z && de3<x0pb
        edotz3=1*max(0,exp(-(de3-x0z)^2/0.16));
    else
        if de3<=x0nb
            edotz3=0 ;
        else
            if de3>=x0pb
                edotz3=0;
            end
        end
    end
end

can be simpified to:

edotz3 = 0;
if (de3 <= x0z && de3 > x0nb) || ...
    de3 >= x0z && de3 < x0pb)
   edotz3 = exp(-(de3 - x0z)^2 / 0.16);
end

Note: max(0, exp(x)) is the same as exp(x), because the result is >= 0 in every case.

Best Answer

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MATLAB: Does MATLAB support the Arduino Zero microcontroller

MATLAB: Variable ‘ep3’ is undefined on some execution paths.

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