CCS/TMS320F28335: ERROR square root function and raised to power function

GEETHANJALI K R

Prodigy 40 points

Part Number: TMS320F28335

Tool/software: Code Composer Studio

I am facing an error when I build my program code. I want to perform the following mathematical computation:

Stator Flux = square root { Direct component of flux squared + Quadrature component of flux squared }

How to do it? I used sqrt() function and pow() function. Please help me out.

D_act=sqrt(pow(D_ds,2),pow(D_qs,2)); // Actual stator flux

Geethanjali

over 6 years ago

0 Victor Kazmirenko over 6 years ago

Guru 13042 points

I would not use pow() to calculate square, but use x*x instead.

0 Keith Barkley over 6 years ago

Guru 35580 points

Show all the code. Make sure to include math.h.

What error do you get?

0 GEETHANJALI K R over 6 years ago in reply to Keith Barkley

Prodigy 40 points

I had included math.h header file. My problem has been solved. The issue was not with pow() function. The square-root function sqrt() should have only one parameter within the parenthesis. But I gave two parameters initially . Thanks anyway

0 Keith Barkley over 6 years ago in reply to GEETHANJALI K R

Guru 35580 points

Ah, yes, should have caught that. If you would have shared the error message, we would have more easily caught it.

0 Victor Kazmirenko over 6 years ago in reply to GEETHANJALI K R

Guru 13042 points

Still you'd better code

D_act = sqrt( D_ds*D_ds + D_qs*D_qs );

No need to abuse pow() for just square.

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CCS/TMS320F28335: ERROR square root function and raised to power function