Multi-serial port IP (Internet Protocol) core based on Avalon-MM (Multi-Media) bus interface

Abstract

The invention relates to a multi-serial port IP core based on an Avalon-MM bus interface, which is designed by adopting a hardware description language Verilog, and comprises: an Avalon-MM bus interface module used for realizing data exchange from an ARM side to an FPGA side; eight serial ports which are used for realizing data interaction between external equipment and the storage unit; three glolal registers and eight register modules, wherein the eight register modules are respectively corresponding to the eight serial ports of the serial data input / output interface unit, and the three global registers are respectively in communication connection with the eight register modules through FPGA internal buses. The Avalon-MM has independent write data lines, read data lines and address lines, and has the advantages of reading effective signals, occupying less resources and the like, eight serial ports are realized in an addressing mode, and the eight serial ports share one interrupt, sothat interrupt resources are greatly saved.

Description

technical field [0001] The invention relates to the technical field of serial port communication, in particular to a multi-serial port IP core based on an Avalon-MM bus interface. Background technique [0002] In an inertial navigation device, the serial port is the main interface for communication between the device and the outside world. An inertial navigation device may have more than a dozen serial ports. These serial ports are mostly implemented by the navigation computer in the device. The core of the navigation computer is the SOC chip integrating FPGA and ARM. The serial port is realized on the FPGA side, and the ARM realizes the read, write and control operations of the serial port on the FPGA side through the AXI bus. [0003] When the device sends data to the outside, the ARM writes the sent data into each serial port in the FPGA through the AXI bus, and the FPGA serial port completes the data parallel-to-serial conversion and sends it out; when the outside sends ...

Images