Frame packer and method for inter-chip data frame protocol processing and metering chip

Abstract

The invention provides a frame packer and method for inter-chip data frame protocol processing and a metering chip. The frame packer comprises a frame setting module used for setting values of a startsymbol, an end symbol, a length symbol, a serial number symbol and a command symbol of a data frame and transmitting the values to a first data selector, a buffer which is used for buffering the metering value carried by the DMA from the metering value register of the metering chip, a state machine which is used for carrying out state transition according to a set data frame format and controlling the first data selector to acquire and output corresponding data, a first data selector which is used for acquiring and outputting corresponding data according to the current state of the state machine and generating a data frame, a verification module which is used for generating a verification value according to the command symbol, the length symbol, the serial number symbol and the data of the data domain output by the first data selector and transmitting the verification value to the first data selector, and a bus protocol processing module which is used for converting the generated dataframe into a data frame conforming to the bus protocol of the communication peripheral and transmitting the data frame to the communication peripheral.

Description

technical field [0001] The invention relates to the field of measurement data transmission, in particular to a frame packer for inter-chip data frame protocol processing, a frame packing method for inter-chip data frame protocol processing, a metering chip and a metering value The method passed to the management core. Background technique [0002] With the proposal of IR46 (International Recommendation46) electric energy meter international proposal, the "dual-core" smart meter solution will become the main direction of my country's next-generation smart meter solution. "Double core" means metering core and management core. The metering core is only responsible for metering and cannot be upgraded for software; the management chip is responsible for upgrading the software of the non-metering part, but not for the metering part. The two are independent of each other and do not affect each other, and can only transmit data through the serial peripheral interface SPI. This pr...

AI Technical Summary

Problems solved by technology

In this case, it will take up a lot of chip resources, reduce the flexibility of program development, and increase the power consumption of the chip.

In addition, the prior art also requires a dedicated SRAM to store the metering value of the metering chip in time, which will lead to a corresponding increase in the area and cost of the chip

At the same time, in order to make the output data conform to the data frame protocol, the existing technology also needs to use a special SPI or other special high-speed communication peripherals, which can accurately process and add symbols other than the data field in real time, and the replacement of communication peripherals requires redesigning , will affect the inheritability of the chip, and seriously delay the development cycle of the chip

Images