FPGA-based SPI interface configuration method

Abstract

The invention provides an FPGA-based SPI interface configuration method, which is used for finishing SPI interface configuration without an upper computer and supports online modification of SPI configuration parameters. A JTAG downloader is arranged and connected with a JTAG interface; the JTAG interface is connected with an FPGA through a configuration connection line; the FPGA is connected to an SPI device through an SPI bus; the FPGA comprises an ROM module, an SPI Ctrl module and an SPI interface module connected in sequence; and the SPI module is connected to the SPI device through the SPI bus. Initial configuration of a peripheral device comprises the processes that a configuration script file of the peripheral device is converted into a binary coded file; the ROM module in the FPGA is instantiated; the ROM module is initialized; the FPGA transmits a binary coded command to the SPI interface module from the ROM module through a state machine configured by the SPI Ctrl module; the SPI interface module of the FPGA forms an SPI interface command accordant with the peripheral device; and the peripheral device is subjected to serial communication configuration.

Description

Technical field [0001] The invention belongs to the technical field of SPI interface configuration, and more specifically is an FPGA-based SPI interface configuration method. Background technique [0002] Field Programmable Array (FPGA) has the advantages of flexibility and timeliness, and can be designed into many common interfaces through flexible programming. [0003] The SPI (Serial Peripheral Interface) bus system is a synchronous serial peripheral interface, which is used to process the communication information exchange between the master device and various peripheral devices in a serial manner. It works in a master-slave mode. This mode usually has a master device and one or more slave devices. At least 4 wires are required. In fact, 3 wires are also available (for one-way transmission). They are SDI (data input), SDO (data output), SCLK (clock), CS (chip select). SDI is the main device data input and the slave device data output; SDO is the master device data output and ...

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