Hi guys,
I'm using STPM34 ASSP IC and get some issues. Hope you can give me a help. I followed it documents and recommend design.
I’m trying to use your evaluation firmware in order to interfaces with STPM34 by using an external MCU (STM32F15) through SPI protocol.
This evaluation firmware working ok and i can easy to access registers of STPM34 IC. But I have some issues, could you please make me clearly understand.
I’m using a basic Timer in order to call METRO_Latch_Measures() function every 600mS and I got value of metroData.energyActive variable. I logging this variable and bellow picture show you result of it:
Can you please let me know why is value of active power sometimes get negative values ?
In the 8.4 section on datasheet said that: “Energy registers are up-down counters, energy register increases its content from 0x00000000 up to the maximum value (0xFFFFFFFF), then it rolls from 0xFFFFFFFF back to 0x00000000�?
And, could you please show me the right way to calculate power consumption value ? I can not found any function in order to calculate power consumption in your evaluation firmware ?
Finally, Could you please tell me that your product STPM34 is support Max Demand feature ?
Thanks all,
