This firmware is a starting point for the development of a metrology application using the STPM32 ASSP for metering applications, and an STM32 microcontroller. It has been implemented for the STEVAL-IPE023V1 USB interface board for the STPM series of energy meter ASSPs, interfaced with the EVALSTPM32 single-phase energy metering evaluation board, but can easily be ported across different MCU families.
The firmware provides the basic functions to initialize, read and write to the STPM32 metrology ASSP through an SPI or UART interface, as well as a basic metrology application based on a microcontroller timer. The firmware uses the IAR toolchain.
Initialization of STM32 MCU
Reset sequence of the STPM32 ASSP
Communication through UART or SPI interface
Block transfer in read and write mode
Data latch through SYN pin of STPM32 ASSP
Basic metrology application example based on STM32 MCU timer to read energy and voltage