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

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.