A method, device and medium for accessing FPGA storage unit based on axi-st interface

Abstract

The invention discloses a method, device and storage medium for accessing an FPGA storage unit based on an AXI-ST interface. The method includes the following steps: opening the slave mode of the AXI-ST interface to receive the read and write operation frames sent by the CPU, and performing the read and write operations Analyze the frame and generate a control signal based on the analysis result; judge whether the control signal is a read request signal; respond to the control signal as a read request signal, read the data of the FPGA storage unit based on the AXI-MM interface; and form an AXI-ST interface based on the data and turn on the master mode of the AXI‑ST interface to send the read response frame to the CPU. The method, equipment and medium for accessing the FPGA storage unit based on the AXI-ST interface proposed by the present invention encapsulate the read and write instructions of the AXI-MM interface in the frame of the AXI-ST interface for transmission, which can be achieved without conversion of the interface. Control can be achieved.

Description

technical field [0001] The present invention relates to the interface field, and more specifically refers to a method, device and readable medium for accessing FPGA storage units based on the AXI-ST interface. Background technique [0002] In the SOC (system-on-chip) design scenario of FPGA (Field Programmable Gate Array, Field Programmable Gate Array), the embedded CPU and its peripheral devices generally use the AXI bus as the bus interface of the device or IP. We refer to the AXI bus for memory mapping as the AXI-MM bus, and the AXI bus for streaming data as the AXI-ST bus. The memory used inside the FPGA or the memory interface controlled by it generally adopts the AXI-MM interface form, but when designing the system, due to the special needs of the main peripherals or for the purpose of simplifying the system bus design, only AXI-ST is selected as the system The primary bus, when the storage unit is connected to the CPU system, it will face the problem of interface con...

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Problems solved by technology

However, in some cases, it is not convenient to use the above two conversion modules

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