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The article expounds a design and implementation of a kind of data acquisition system based on the FPGA + DSP architecture. The FPGA collects the analog data, the frequency data, the discrete input data, RS-422 buses data and ARINC429 buses data, then, these data will be sent to the DSP through the HPI. According to the agreement, the DSP finishes the data calculation and combination. The FPGA reads the processing results through the HPI, then the results will be sent to the corresponding systems by discrete output module, RS-422 buses and ARINC429 buses.