基于DSP和FPGA的油田测井系统总线通信接口设计

Design of Communication Interface System for Logging Tool Based on FPGA and DSP

基于DSP和FPGA控制技术,设计了一种应用于井下仪器和地面系统通信的接口系统,实现了1553B总线和CAN总线间数据通信接口电路和通信程序设计。DSP和FPGA之间采用高速缓存McBSP接口进行通信,DSP通过上层应用程序实现了1553B总线与CAN总线的通信协议转换;FPGA完成对1553B总线的独立处理。该总线接口已顺利通过测试,在实时性、可靠性以及处理速度方面得到提高。

A communication interface system based on digital signal processor（DSP） and field programmable gate array（FPGA） technology is designed for logging system to complete bidirectional transmission of data/instructions through the 1553B bus and Can bus conversion circuit as a bridge across surface system and downhole tool.The DSP and FPGA communicate through Cache McBSP interface and complete the 1553B bus and CAN bus communication protocol conversion through the upper Applications.FPGA complete the deal with the 1553B bus independented.The bus interface has been successfully passed the test,in real-time,reliability and processing speed has been improved significantly.