Fpga chip and method for realizing pcie interface to cf card interface

Abstract

The invention relates to the field of transforming PCIe interfaces into CF card interfaces, in particular to an FPGA chip and method for transforming a PCIe interface into a CF card interface. The FPGA chip comprises a PCIe IP core module, an adapter module, a direct memory access module, a CF card interface protocol module and a control register. For PIO instructions, the control register controls the CF card interface protocol module to compose the instruction content into a corresponding CF card interface instruction time sequence; for Ultra direct memory access instructions, the control register controls the direct memory access module to set the maximum bus burst transmission length, CPU side storage addresses and the transmission data length of this time, the direct memory access module waits for the requirement which indicates the ready state of data / space and is given by the CF card interface protocol module, and the control register controls the CF card interface protocol module to transmit the Ultra direct memory access instructions. The FPGA chip can meet different requirements of different use scenes and is high in flexibility.

Description

technical field [0001] The invention relates to the field of converting a PCIe interface to a CF card interface, in particular to an FPGA chip and a method for realizing the conversion of a PCIe interface to a CF card interface. Background technique [0002] With the maturity and high performance of PCIe (Peripheral Component Interconnect express) technology, CPU peripheral interfaces are limited, and the use of PCIe interfaces to mount external devices is becoming more and more widely used. CF (Compact Flash, a data storage device for portable electronic devices) card, as a universal and reliable removable portable memory, has a wide range of requirements in communication equipment and industrial equipment. The CF card interface conforms to PATA (Parallel Advanced Technology Attachment, parallel hard disk Interface technology) Definition of interface protocol. [0003] There are fewer types of bridging function chips from PCIe interface to CF card interface. The existing P...

AI Technical Summary

Problems solved by technology

[0003] There are few types of bridging function chips from PCIe interface to CF card interface. The existing PCIe interface to CF card interface chips are all produced in a unified way. For some special requirements in different usage scenarios, such as timing start data transmission, DMA module Actively initiate data transmission, configurable CF card interface timing and other functions cannot meet the requirements one by one, the flexibility is low, and it cannot adapt to various usage scenarios

Images