Avalon2AHB Bridge Core: The bridge core performs the main protocol translation between Avalon and AHB buses. This block is responsible for converting Avalon transactions into equivalent AHB transactions. It converts Avalon control signals into AHB signals such as HADDR, HWRITE, HTRANS, HSIZE, and HWDATA.The core manages the timing differences between Avalon and AHB protocols.It controls the state machine that handles read and write transaction sequencing. If required, it performs data buffering or synchronization to ensure reliable data transfer.It also manages response handling, collecting read data and status signals from the AHB busand converting them back into Avalon responses. Thus, the bridge core acts as the protocol translator and controller, ensuring correct communication between two different bus standards.
Avalon Slave Interface: The Avalon Slave Interface is the input side of the bridge that connects to an Avalon-based master such as a processor, DMA controller, or other Avalon bus master.It receives read and write requests, addresssignals, control signals, and write data from the Avalon master.The interface interprets Avalon protocol signals such as address, read/write commands, byte enables, and wait requests.It temporarily stores or buffers the incoming transaction information before passing it to the bridge core.Handshake signals are managed to ensure the Avalon master knows whether the bridge is ready to accept new transactions. In simple terms, this interface acts as the communication entry point for Avalon-based systems, capturing all requests that need to be forwarded to the AHB bus.
AHB Master Interface: The AHB Master Interface is the output side of the bridge that connects to the AHB bus in the system.The bridge behaves as an AHB master, initiating transactions on the AHB bus based on the requests receivedfrom the Avalon side.It sends address, control, and data signals to AHB slaves such as memory controllers or peripherals.It handles AHB handshake signals like HREADY and HRESP to determine when transactions are completed.For read operations, it receives HRDATA from AHB slaves and passes it back to the bridge core for delivery to the Avalon side.This interface allows the bridge to actively perform memory or peripheral accesses on the AHB bus on behalf of the Avalon master.
