ID number compression device for AXI bus

Abstract

The invention discloses an ID number compression device for an AXI bus, the ID number compression device is arranged in the AXI bus, and the ID number compression device comprises an ID number storageunit and a synchronous FIFO module; the ID number storage unit is used for storing effective data in the synchronous FIFO module and used for mapping an actual ID number to a virtual ID number and mapping the virtual ID number to the actual ID number; the synchronous FIFO module comprises an FIFO memory, a state generation module, a read address generation module, a write address generation module and an MUX, and the state generation module is used for generating a space occupation state of the FIFO memory; and after the system is powered on, a shared memory is in an idle state, the FIFO state is full, and initialization is carried out. The redundant ID number of a master device is compressed and converted and then sent to a slave device, so that the problem of data transmission errors caused by the fact that the digit of the ID number of the master device is larger than that of the slave device in the AXI bus is solved.

Description

technical field [0001] The invention belongs to the technical field of AXI bus in a multi-core system on chip, and in particular relates to an ID number compression device for the AXI bus. Background technique [0002] AXI (Advanced eXtensible Interface) is a bus protocol. This protocol is the most important part of the AMBA (Advanced Microcontroller Bus Architecture) 3.0 protocol proposed by ARM. It is an on-chip bus for high performance, high bandwidth, and low latency. . Its address / control and data phases are separated, and it supports unaligned data transmission. At the same time, in burst transmission, only the first address is needed, while separate read and write data channels, and supports significant transmission access and out-of-order access, and Easier line timing closure. AXI technology enriches the existing AMBA standard content to meet the needs of ultra-high performance and complex system-on-chip (SoC) design. AXI features: Unidirectional channel architec...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned technical problems, the object of the present invention is to provide an ID number compression device for the AXI bus. The present invention compresses and transforms the redundant ID number of the master device and sends it to the slave device to ensure that the data is correct and valid. Transmission, there will be no bus congestion caused by data mistransmission, and it is used to solve the data transmission error problem caused by the AXI bus when the number of master device ID numbers is greater than that of the slave device

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