FlexSPI interface driving method and system for communication between FPGA and ARM

Abstract

The invention discloses a FlexSPI interface driving method for communication between an FPGA (Field Programmable Gate Array) and an ARM (Advanced RISC Machines), which is applied to an on-chip system in which the FPGA and the ARM are connected with each other through a FlexSPI interface, and comprises the following steps: acquiring clock information and interrupt information in a preset FlexSPI equipment tree, and carrying out clock configuration and interrupt configuration according to the clock information and the interrupt information; configuring an edge triggering mode and a data bit width in the LUT table; character equipment corresponding to the FPGA is initialized, preset driving layer operation functions are bound to the character equipment, FlexSPI interface character equipment for operation of an application layer is obtained, and the driving layer operation functions correspond to operation functions of the application layer in a one-to-one mode. According to the invention, the driving structure is simplified while high-speed data transmission is realized, and the device can be adapted to various hardware devices.

Description

Technical field [0001] The present invention relates to the field of driving technology, and in particular to a FlexSPI interface driving method and system for communication between FPGA and ARM. Background technique [0002] With the rapid development of information technology, FPGA and ARM chips are widely used in various electronic devices, and the communication method between FPGA and ARM has become more and more important. The traditional communication method between FPGA and ARM is mainly serial communication, PCIE communication, etc. Among them, serial communication has low bandwidth and slow speed, and can only meet low-speed data transmission requirements. Although PCIE communication is fast enough, the driver is complex and the platform requirements are relatively high. [0003] FlexSPI is a serial communication bus used to drive DDR and NOR Flash under TI's i.MX8 platform. The interface can be flexibly configured into single data line, 4 data line, 8 data line and...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of information technology, FPGA and ARM chips are widely used in various electronic devices, and the communication mode between FPGA and ARM is becoming more and more important. The traditional communication mode between FPGA and ARM is mainly serial communication, PCIE communication, etc. Among them, the serial port communication has low bandwidth and slow speed, which can only meet the low-speed data transmission requirements. Although the PCIE communication method is fast enough, the driver is complicated and the platform requirements are relatively high.

[0003] FlexSPI is a serial communication bus used to drive DDR and NOR Flash under TI's i.MX8 platform. This interface can be flexibly configured into modes such as single data line, 4 data lines, and 8 data lines. It can reach about 120MB. Compared with the serial port, the bandwidth is higher and the transmission speed is faster. However, at present, this interface does not provide a driver for communicating with the FPGA. It only provides a NOR Flash driver based on the Linux system, and the driver is a specific device driver, which cannot be used in applications. Layer adaptation to a variety of hardware devices

Images