Hello,
I am using DSPIC33EP16GS502 with CCS software for controlling my SMPS circuit.
My code consist a MPPT algorithm. So far I have managed to set ADC and PWM module and run the system. However, I would like to arrange the ADC channel so that it will start the conversion at the half of the PWM pulse.
I have tried to clear what i mean in the picture below.
I think i will use PWM interrupt to trigger ADC but i could not figure out how to do.
Any help would be appreciated.
Thanks.
I have been implementing something similar. For your proposed sequence of events for ADC, you would be needing an interrupt driven system. If you code everything in simulink, the ePWM block does give you this feature as to when start the ADC. Double click on ePWM block and go to "Event Trigger", there you have several options in the "Start of conversion for module". The simulink file once built can be used in code composer for programming your microcontroller.
I figure out how to do it. There is TRIGx register which is a number. When the counter of PWM module reaches that number, a trigger signal will be generated by PWM module for ADC module.
Then ADC module should be configured. I used PWM interrupt that occurs when the trigger signal is generated and started the ADC conversion inside the PWM interrupt.
For further detail one can refer to this link:
https://microchipdeveloper.com/pwr3101:transition-to-digital-adc
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