CCS/TMS320F28069: How to calculate the integral of a variable

Do you have any sampling time also? if yes. 

Ts = sampling time. 

w = Frequency. 

step = w*Ts; 

now 

Theta = Theta + step 

and 

mask  and make theta zero after reaching 2*PI; 

where PI = 3.14;

Maybe this help you. 

Ashutosh

Thanks Ashutosh for the quick reply. Is it fine if sampling time is set as 1 second. Could you please help me to write complete code for the below block diagram where current and frequency controllers are PI controllers. I want to know how I could implement a PI controller using equation.

Hi DAN,

In addition to Mr. Manish Sir, you also go through the pdf attached by me. In this, you got all the modules which use to implement the above control loop. Still, you have some difficulty please give me the reply.

Now the sampling time of 1 Sec is too large for PLL locking. There is 50 / 60 Hz mains are present in the worldwide most application. which means you need to take at lease 150 Sample per second for PLL as well as for the PI controller and sensors.

6825.DMC MATH_v13.1.pdf

Dan,

you are on F28069 which has floating point processor. I'll highly recommend just using floating point, so you don't have to go through the learning curve on IQmath which is only needed for fixed-point processors.

-Manish