POWER AND ENERGY value from STPM32

Hello,

I am using STPM32 to monitor the voltage and current. When I refer the datasheet of STPM32 it shows we can directly get the power and energy value from STPM32. I am using STM32F429 as my MCU and using UART communication with STPM32.

Please tell me how and which register to access to get the power and energy value from STPM32.