TMS320F28335: Model for Simulink based buck converter control

I have been trying to implement the logic that I used in my simulations using F28335. But I am having difficulties using the encoder blocks.

Control logic I am trying to develop:

Generate error signal from comparing the values across two ADC inputs (reference and feedback) if the error is positive (i.e. reference > feedback) increase the duty cycle of ePWM output else decrease the duty cycle of ePWM.

Also, if I use the ADC block and attach a scope and run the simulation after transferring the code to hardware, I cannot view the converted value by the ADC (I am varying the voltage across the ADC pins betwwen 0-3V but the scope always reads 0).

Can someone please guide me through using the Simulink?

Answer 1

[Venkatesh Chilapur]

Hi,

Please let us know if this example works for you.

The example would use the ADC and PWM module.

https://in.mathworks.com/help/supportpkg/texasinstrumentsc2000/ug/adc-pwm-synchronization-via-adc-interrupt.html

Regards,

Venkatesh C

Answer 2

[Antonin]

Hi Priyanka,

Are you trying to run "Peak current control"? Let us know,

Thanks,

Antonin.

[mehdi goudarzi]

hi antonin

i tried to run peak current control but f28335 get me an error for using rs flip flop

can you help me

thanks

mehdi