ADC trigger with PWM and reading voltage on its state

[gokhannsahin]

Hi everyone,

I have a question about ADC trigger. I have to generate a PWM 1.1KHz and read the avarage voltage of ADC pin accoding to the On/Off state of that PWM. How can I make it.? I enclosed an image about it.

[gokhannsahin]

Thank you @S.Ma​ 

I didn't understand what you meant in second paragraph. Please give me more details?