Method for adapting and transmitting PCI bus to configurable frame length serial bus

Abstract

The invention provides a method for adapting and transmitting a PCI (Peripheral Component Interconnect) bus to a configurable frame length serial bus. The method comprises the following steps that conversion from the PCI bus to a local bus is realized by using a PCI core; the adaptation from the local bus to the serial bus IP core with the configurable frame length is realized; when a data frame is sent, the serial bus IP core achieves framing and encoding of sent data, the encoded data frame is filled into a sending buffer area through a sending data register, then parallel-serial conversionand encoding are conducted through a logic unit, and the encoded data is transmitted out through an LVDS transmitter. When a data frame is received, a low-voltage differential signal is converted intoa serial signal through the LVDS transmitter, then the serial signal enters the FPGA and the serial bus IP core to achieve decoding and caching of the data frame, and finally the data frame is read from the receiving buffer area through the PCI core and processed and resolved. According to the invention, the conversion from the PCI bus to the local bus and the adaptation from the local bus to thehigh-speed serial port are realized.

Description

technical field [0001] The invention belongs to the design field of an avionics system airborne computer, and relates to a method for adapting and transmitting a PCI bus to a serial bus with a configurable frame length. Background technique [0002] With the rapid development of avionics systems, the low-cost, high-reliability communication between many airborne devices has become a key problem to be solved in the development of airborne devices; The host interface of the low-power, high-performance CPU is a PCI bus, in order to realize low-cost, high-reliability communication between the CPU with a host interface of the PCI bus and many airborne devices. [0003] At present, the PCI bus is used to convert the local bus to a dedicated bridge chip. The control is complex and the adaptability is poor. It often needs to be controlled by a programmable logic device to convert and adapt to a variety of local buses, resulting in increased costs and transplantation. Poor performan...

AI Technical Summary

Problems solved by technology

[0003] At present, the PCI bus is used to convert the local bus to a dedicated bridge chip. The control is complex and the adaptability is poor. It often needs to be controlled by a programmable logic device to convert and adapt to a variety of local buses, resulting in increased costs and transplantation. Poor performance; In the communication of the serial system, the common UART or USART protocol is generally used for communication. The disadvantage of this communication method is that the frame length is fixed and the bit error rate is high.

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