Design Of Loudspeaker Array System Based On STM32H743IIT6

In recent years,with the improvement of science and technology,the application of loudspeaker array in life is more and more extensive.The traditional speaker array system mostly uses FPGA and DSP to develop and design,which has high cost and difficult design.Therefore,it is of great significance to further study the loudspeaker array system.According to the main characteristics of loudspeaker sound field control,an advanced and cost-effective loudspeaker array system is designed by adopting STM32H743IIT6,a high-end embedded processor chip newly launched by STMicroelectronics' in 2018.The chip has the main frequency as high as 400MHz and DSP instruction set,which is low cost and easy to be popularized.This thesis focuses on the design of loudspeaker array system.The main work are as follows:(1)The hardware circuit design of loudspeaker array system is completed.The STM32H743IIT6 main control system board and audio acquisition circuit are designed.According to the characteristics of TLV5610 chip,the D/A conversion module is designed.The active low-pass filter circuit is designed,and the TPA3116 chip is used to design the power amplifier to improve the audio signal power.According to the principle of sound field control,a loudspeaker array system with the functions of signal acquisition,processing,display and output is designed to realize the directivity control of sound field.(2)The software design of loudspeaker array system is completed.Based on ?C/OS-?real-time operating system,audio signal acquisition,RTC real-time clock,RGBLCD display,TLV5610 digital to analog conversion and other programs are designed to effectively improve the real-time performance of the system.(3)Based on the analysis of phase control theory and FIR filtering algorithm,the directivity control program of loudspeaker array system is designed by making full use of Cortex-M7 core DSP instruction set.Using STM32H743IIT6 chip to design data processing program and signal output program,optimizing program to make data processing speed comparable to DSP.(4)A linear loudspeaker array corresponding to the loudspeaker array system is designed.A 1×16 loudspeaker array panel and a loudspeaker array platform are designed and manufactured.The test results show that the loudspeaker array system based on STM32H743IIT6 has good sound field controllability.