CPCI serial port plate based on state machine and on-chip bus and working method of CPCI serial port plate

Abstract

The invention belongs to the field of computer communication, and particularly relates to a CPCI serial port plate based on an FPGA state machine and a WB on-chip bus and a working method of the CPCI serial port plate. By the adoption of a single-master and multi-slave on-chip bus running mode, the CPCI serial port plate comprises a processing unit, 8-access or 16-access asynchronous transceivers, dual-port SDRAM adhesion logic, an address decoder, a configuration state register area, serial port received signal filtering logic and other circuits. Soft cores of the asynchronous transceivers support the WB on-chip bus. The asynchronous transceivers are compatible with an NS16550A device. A board serial port has the expansion capacity. The communication rate of serial ports is larger than 2 Mbps, and each serial port is provided with six byte data buffer areas. The delay time between communication transceiving frames can be adjusted in 256 gears, the longest delay time is 10 us, the shortest delay time is 2.56 milliseconds, and the error is smaller than 0.1 us. An upper computer can configure the serial ports independently and monitor the serial ports comprehensively, multi-serial-port data transceiving, processing and storing procedures are executed through the FPGA state machine, and time sequence performance is highlighted.

Description

technical field [0001] The invention belongs to the technical field of computer communication, and in particular relates to a CPCI serial board based on an FPGA state machine and a WB on-chip bus and a working method thereof. Background technique [0002] The computer communication adapter is an information communication bridge between the computer and external equipment. It has functions such as two-way communication, data buffering, and parameter setting. It is mainly used for data communication, status monitoring, experimental testing, and maintenance of external equipment. CompactPCI (Compact Peripheral Component Interconnect, Compact Peripheral Component Interconnect Standard, hereinafter referred to as CPCI) asynchronous serial port board is installed in the CPCI expansion slot of the computer. There are CPCI bus controller module, multi-channel asynchronous serial port module and data processing unit on the board card And the data buffer, can realize the asynchronous ...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems that the current CPCI asynchronous serial port board has long response delay time, waste of FPGA resources, complex structure of the system on chip, poor scalability, insufficient functions, and poor compatibility, the present invention proposes a CPCI asynchronous serial port based on FPGA state machine and WB bus Board and how it works

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