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TMS320F28335: To generate SPWM using ADC interrupt and ePWM in Simulink

Part Number: TMS320F28335

Hi all,

I am using TMS320F28335 DSP (Experimenter kit) to implement a SPWM to control the 3 phase inverter. I have generated SPWM using sine block and ePWM block in simulink Matlab. Now I want to generate SPWM with ADC interrupt block, i.e. I replace sine block with ADC interrupt block and input as 0 -3V sine from function generator . I am cant proceed further. I attaching the matlab model screen for reference.

***.Whether any buffer circuits is required to connect between ADC signal and DSP pin A0. For ADC interrupt i used the example available in Matlab help.

Parameter:

Gain 5 , Time period 20480.

ADC sine input Freq 50Hz, voltage 0 - 3V. offset 0.  

Image 1 is using sine block to generate SPWM.

The image 2 and 3 is ADC interrupt block  replacing sine block by ADC interrupt.

Thanks, 

Eesan