Airborne embedded audio interface control system based on CPU + FPGA and control method thereof

Abstract

The invention provides a CPU + FPGA-based airborne embedded audio interface control system and a control method thereof.An embedded CPU processor is cross-linked with an I2C interface of an audio encoder through an I2C bus and writes parameters into a control register of the audio encoder, the embedded CPU processor receives audio data and sends the audio data to an FPGA, the FPGA receives the audio data, and the FPGA sends the audio data to the control register of the audio encoder; the audio data is stored in an internal instantiated FIFO (First In First Out), and the audio data is output to an audio encoder; and after the audio encoder receives the I2S bus data, an analog audio signal is output by a corresponding output channel. According to the invention, software and hardware decoupling is realized, the application of a heterogeneous platform is compatible, and the reliability is improved; audio signal output of multiple sampling rates can be realized through flexible configuration of software, and the requirements of multiple application scenes of different airborne embedded devices are met; decoupling with underlying hardware is achieved, and the method has the advantages of being high in transportability and high in reliability.

Description

technical field [0001] The invention relates to the field of embedded systems, in particular to a control system and configuration method based on an airborne embedded audio interface. Background technique [0002] According to different application scenarios, the sampling rate requirements of audio interfaces in airborne embedded electronic devices are diverse, and the configuration flexibility of drivers is high; with the development and progress of national defense technology, the development cycle of avionics products is further shortened, and the reusability is strong The embedded driver design method with high reliability and high reliability has become the key technology to be overcome urgently. [0003] The existing airborne embedded audio interface driver design method has the following disadvantages: [0004] 1. Poor reusability and long development cycle: The traditional airborne embedded audio interface driver is only implemented by FPGA programming, and the con...

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Problems solved by technology

[0004]1. Poor reusability and long development cycle: The traditional airborne embedded audio interface driver is only realized by FPGA programming, and the configuration of I2C interface is usually called I2C through MicroBlaze soft core IP core implementation, high development complexity and poor portability;

[0005]2. Poor reliability: The MicroBlaze soft core instantiated inside the FPGA is opaque to users and has poor reliability;

[0006]3. Poor configuration flexibility: FPGA program development is highly complex, and after the logic image is cured, if you want to change the configuration, you need to re-develop the logic, which cannot realize the configuration, and it is difficult to meet a variety of audio Sample Rate Configuration Requirements

[0007] For the shortcomings of low reusability, poor reliability, and difficulty in flexible configuration of the previous airborne embedded audio interface driver, the traditional airborne embedded audio interface driver design method has been unable to Invention and design of a new CPU+FPGA-based airborne embedded audio interface driver design method to meet application requirements is an urgent research topic

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