A PCI bus controller and its control method

Abstract

The invention discloses a PCI (Peripheral Component Interconnect) bus controller and a control method thereof. Through SPI (Serial Peripheral Interface) signal multiplexing, two configuration information initialization ways including EEPROM (Electrically Erasable Programmable Read-Only Memory) loading or unloading are provided so as to be flexible in use; and through the arrangement of a plurality of interface modules, a SPI bus, a PCI bus, a Local bus and corresponding pin interfaces can be realized. The PCI bus controller can be used as PCI master / slave equipment, has a wide application range and meets different requirements of a system; and when the PCI bus controller is used as the PCI master equipment, DMA (Direct Memory Access) data transmission is carried out, CPU (Central Processing Unit) intervention is avoided, and system efficiency is improved. When the PCI bus controller is used as the PCI bus master equipment to initiate a bus operation, data interaction between system memory and Local equipment is finished; and during non DMA transmission, the PCI bus controller is used as the PCI bus slave equipment to response to the bus operation. The PCI bus controller provides 8-bit, 16-bit, 32-bit multiplex / non-multiplex Local bus interfaces, can configure and realize various working ways including emergency, prefetching, internal waiting, external waiting, write cycle maintaining, read-write gating delay, big end and small end alignment, local chip selection, local interruption and the like, and is high in universality.

Description

technical field [0001] The invention relates to the field of computer systems based on PCI bus architecture, in particular to a PCI bus controller and a control method thereof. Background technique [0002] The computer system based on PCI bus consists of two types: master device and slave device. The master device initiates PCI bus operation, and the slave device responds to the operation, and converts the timing sequence of the PCI bus into the timing sequence of the local bus to complete the access to the local device. The PCI bus controller It is the core module of this computer system. [0003] A high-speed data transmission method based on PCI bus (Chinese patent CN102495817A) introduces the design method of a driver program based on PCI bus for high-speed data transmission from an application point of view; a PCI bus DMA high-speed data transmission method (Chinese patent CN101916237A) through PCI bus Implementation method for DMA data transmission; PCI slave device ...

AI Technical Summary

Problems solved by technology

[0004] The research on PCI bus technology and related patent achievements are mainly aimed at improving the bus transmission efficiency for the application of PCI bus technology, or performing PCI protocol processing for specific applications, which cannot meet the general, flexible, and efficient system application requirements.

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