Description: This a use of DSPIC33FJ64MC802 chip audio AD sampling and FFT transform (power spectrum) and will receive procedures for serial port to send data.The program is used for the design of a sound power spectrum analysis.When using need to cooperate with the periphery of the amplifier, filter, adder, and power, and other circuit.Combined with the feature of PC software for display.
FFT function in Microchip, the 256- point FFT transform problems, cannot get normal data.This is due to the fault of rotating factor table.This program has made a correction on it.In power spectrum calculation function at the same time, also made some optimization, when measuring small amplitude, the result will be more ideal.
This procedure in audio analysis and transmission, completely achieved real-time analysis.In combination with the PC software of ideal, can build the real-time system.This is really quite rare.But, as a result of the limitation of the guaranteed real-time and rate of serial port, the s
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File list (Check if you may need any files):
Voice_frequence
...............\ADC.c
...............\ADC.h
...............\ADC.o
...............\FFTrun.c
...............\FFTrun.h
...............\FFTrun.o
...............\UART.c
...............\UART.h
...............\UART.o
...............\Voice_frequence.cof
...............\Voice_frequence.hex
...............\Voice_frequence.map
...............\Voice_frequence.mcp
...............\Voice_frequence.mcs
...............\Voice_frequence.mcw
...............\base.c
...............\base.h
...............\base.o
...............\configuration.h
...............\cplxsqrmag.o
...............\cplxsqrmag.s
...............\delay.c
...............\delay.h
...............\delay.o
...............\dspcommon.inc
...............\fft.o
...............\main.c
...............\main.o
...............\readme.txt
...............\timer.c
...............\timer.h
...............\timer.o
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