Use the STM32 DSP library functions, the signal of the AD to the FFT transform, and display to the LCD screen. Do is 512 points fft, show the number 240, and there is a certain guarantee of accuracy. With real-time high.

ADC11
.....\ADC.Opt
.....\ADC.Uv2
.....\ADC_Opt.Bak
.....\ADC_STM32-FD-ADC.dep
.....\ADC_Uv2.Bak
.....\cr4_fft_256_stm32.s
.....\FWlib
.....\.....\inc
.....\.....\...\misc.h
.....\.....\...\stm32f10x_adc.h
.....\.....\...\stm32f10x_bkp.h
.....\.....\...\stm32f10x_can.h
.....\.....\...\stm32f10x_conf.h
.....\.....\...\stm32f10x_crc.h
.....\.....\...\stm32f10x_dac.h
.....\.....\...\stm32f10x_dbgmcu.h
.....\.....\...\stm32f10x_dma.h
.....\.....\...\stm32f10x_exti.h
.....\.....\...\stm32f10x_flash.h
.....\.....\...\stm32f10x_fsmc.h
.....\.....\...\stm32f10x_gpio.h
.....\.....\...\stm32f10x_i2c.h
.....\.....\...\stm32f10x_iwdg.h
.....\.....\...\stm32f10x_nvic.h
.....\.....\...\stm32f10x_pwr.h
.....\.....\...\stm32f10x_rcc.h
.....\.....\...\stm32f10x_rtc.h
.....\.....\...\stm32f10x_sdio.h
.....\.....\...\stm32f10x_spi.h
.....\.....\...\stm32f10x_tim.h
.....\.....\...\stm32f10x_type.h
.....\.....\...\stm32f10x_usart.h
.....\.....\...\stm32f10x_wwdg.h
.....\.....\SRC
.....\.....\...\misc.c
.....\.....\...\stm32f10x_adc.c
.....\.....\...\stm32f10x_bkp.c
.....\.....\...\stm32f10x_can.c
.....\.....\...\stm32f10x_crc.c
.....\.....\...\stm32f10x_dac.c
.....\.....\...\stm32f10x_dbgmcu.c
.....\.....\...\stm32f10x_dma.c
.....\.....\...\stm32f10x_exti.c
.....\.....\...\stm32f10x_flash.c
.....\.....\...\stm32f10x_fsmc.c
.....\.....\...\stm32f10x_gpio.c
.....\.....\...\stm32f10x_i2c.c
.....\.....\...\stm32f10x_iwdg.c
.....\.....\...\stm32f10x_pwr.c
.....\.....\...\stm32f10x_rcc.c
.....\.....\...\stm32f10x_rtc.c
.....\.....\...\stm32f10x_sdio.c
.....\.....\...\stm32f10x_spi.c
.....\.....\...\stm32f10x_tim.c
.....\.....\...\stm32f10x_usart.c
.....\.....\...\stm32f10x_wwdg.c
.....\.....\...\system_stm32f10x.c
.....\JLinkLog.txt
.....\list
.....\....\ADC.map
.....\....\cortexm3_macro.lst
.....\....\cr4_fft_256_stm32.lst
.....\....\cr4_fft_64_stm32.lst
.....\....\fsmc_sram.i
.....\....\lcd_dis24.i
.....\....\main.i
.....\....\misc.i
.....\....\Screen.map
.....\....\startup_stm32f10x_hd.lst
.....\....\startup_stm32f10x_ld.lst
.....\....\startup_stm32f10x_md.lst
.....\....\STM32-FD-ADC.map
.....\....\STM32F10x.lst
.....\....\stm32f10x_adc.i
.....\....\stm32f10x_dac.i
.....\....\stm32f10x_dma.i
.....\....\stm32f10x_exti.i
.....\....\stm32f10x_flash.i
.....\....\stm32f10x_fsmc.i
.....\....\stm32f10x_gpio.i
.....\....\stm32f10x_it.i
.....\....\stm32f10x_nvic.i
.....\....\stm32f10x_rcc.i
.....\....\stm32f10x_tim.i
.....\....\stm32f10x_usart.i
.....\....\stm32f10x_vector.lst
.....\main函数留存.txt
.....\obj
.....\...\ADC.axf
.....\...\ADC.hex
.....\...\ADC.htm
.....\...\ADC.lnp
.....\...\ADC.plg
.....\...\ADC.sct
.....\...\ADC.tra
.....\...\cortexm3_macro.o
.....\...\cr4_fft_256_stm32.o
.....\...\cr4_fft_64_stm32.o
.....\...\ExtDll.iex

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