FFT.rar_LCDfft_ad1674_fft_接受声音信号并运用FFT算法，通过AD转换成数字信号显示方向在lcd上资源-CSDN文库

共43个文件

o：10个

c：9个

h：9个

版权申诉

ad1674

fft

76 浏览量 2022-09-24 02:01:44 上传评论收藏 113KB RAR 举报

标题中的"FFT.rar_LCD fft_ad1674_fft"揭示了这个压缩包主要涉及三个关键概念：快速傅里叶变换（FFT），LCD显示以及AD1674模数转换器。接下来，我们将深入探讨这些技术及其在实际应用中的重要性。快速傅里叶变换（FFT）是一种计算离散傅里叶变换（DFT）的有效算法，它大大减少了计算复杂度，从O(N^2)降低到O(N log N)，其中N是处理的数据点数。在信号处理、图像处理、音频分析等领域，FFT被广泛用于频率域分析，例如检测信号的频率成分或者进行滤波操作。在描述中提到的"fft_LL_Final"程序，就是在一个LPC2368微控制器上实现了FFT算法，用于对由AD1674采集的模拟信号进行数字转换。 LPC2368是一款基于ARM7TDMI-S内核的微控制器，由NXP Semiconductors生产。它具有丰富的外设接口，如LCD控制器，这使得它能够直接驱动液晶显示屏显示数据。在这个项目中，LCD被用来可视化AD1674采集并经过FFT处理后的数据，为用户提供直观的频域信息。LCD显示不仅方便了调试，也使得实时监控成为可能。 AD1674是一款12位、高速、低功耗的模数转换器（ADC）。它能将连续的模拟信号转换为离散的数字信号，以便微控制器可以处理。在本例中，AD1674用于从外部传感器或其他信号源获取模拟信号，这些信号可能是声音、振动或任何其他物理现象的电气表示。经过AD1674的转换后，数字信号进入LPC2368，然后通过FFT程序进行分析。在实际应用中，这种组合——AD1674采集，LPC2368处理和LCD显示——可能出现在各种领域，比如音频分析仪、环境监测设备或者工业控制系统的故障诊断工具。通过实时展示FFT结果，用户可以迅速识别出信号中的频率特征，这对于故障检测、噪声分析和系统优化至关重要。总结来说，这个项目结合了硬件和软件，展示了如何利用微控制器进行实时信号处理。通过AD1674模数转换器获取模拟信号，用LPC2368执行FFT算法来转换为频率域信息，并在LCD屏幕上呈现结果，提供了一种实用的解决方案，适用于多种需要频谱分析的场合。这个压缩包内的"FFT"文件很可能包含了实现这一功能的所有代码和配置文件，供开发者参考和学习。

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收起资源包目录

FFT.rar （43个子文件）

FFT

FFT.plg 156B

iap.h 689B

Lst

LPC2300.lst 53KB

FFT.map 122KB

irq.c 3KB

FFT_Target 1.dep 3KB

time_rtc.h 611B

key.h 225B

lcd.c 41KB

main.c 26KB

lcd.h 1KB

FFT.Uv2 3KB

FFT_Uv2.Bak 3KB

irq.h 2KB

iap.c 3KB

Hardware.h 534B

key.c 1KB

adc.h 1KB

fft.c 2KB

adc.c 3KB

GPIO.c 1KB

main.h 305B

LPC2300.s 20KB

Obj

FFT.plg 165B

fft.o 14KB

gpio.o 65KB

FFT.tra 1KB

LPC2300.o 3KB

FFT.lnp 311B

lcd.o 86KB

iap.o 65KB

key.o 64KB

FFT.axf 145KB

time_rtc.o 67KB

adc.o 71KB

irq.o 64KB

FFT.sct 429B

main.o 107KB

FFT.htm 123KB

FFT_Opt.Bak 3KB

FFT.Opt 3KB

GPIO.h 221B

time_rtc.c 1KB

#include <LPC23xx.H> #include "Hardware.h" #include "lcd.h" #include "GPIO.h" unsigned char curse_x,curse_y; const unsigned char check[]= { /*------------------------------------------------------------------------------ ; 源文件 / 文字 : D:\Backup\我的文档\My Pictures\未命名.bmp: 图形文本 ; 宽×高（像素）: 8×8 ------------------------------------------------------------------------------*/ 0x00,0x03,0x06,0x0C,0x18,0xB0,0x60,0x20 }; const unsigned char E_D_C[]= { /*------------------------------------------------------------------------------ ; 源文件 / 文字 : Audio Analyzer ; 宽×高（像素）: 192×32 ------------------------------------------------------------------------------*/ 0x1C,0x70,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3A,0xE1,0xC0,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x75,0xC3,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6B,0x87,0x00,0x00,0x00,0x00,0x30,0x00, 0x03,0x00,0x00,0x00,0x06,0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x57,0x0E,0x00,0x00,0x00,0x00,0x70,0x00,0x03,0x00,0x00,0x00,0x0E,0x00,0x00,0x03, 0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x2E,0x1C,0x00,0x00,0x00,0x00,0x60,0x00, 0x06,0x00,0x00,0x00,0x0C,0x00,0x00,0x03,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x5C,0x38,0x00,0x00,0x00,0x00,0xE0,0x00,0x06,0x00,0x00,0x00,0x1C,0x00,0x00,0x07, 0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x70,0x00,0x00,0x00,0x01,0xE0,0x00, 0x0C,0x00,0x00,0x00,0x3C,0x00,0x00,0x07,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x70,0xE0,0x00,0x00,0x00,0x01,0xC0,0x00,0x0C,0x00,0x00,0x00,0x38,0x00,0x00,0x0F, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x61,0xC0,0x00,0x00,0x00,0x03,0xC0,0x00, 0x19,0xC0,0x00,0x00,0x78,0x00,0x00,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x43,0x80,0x00,0x00,0x00,0x06,0xC0,0x00,0x31,0x80,0x00,0x00,0xD8,0x00,0x00,0x1E, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x07,0x80,0x00, 0x30,0x00,0x00,0x00,0xF0,0x00,0x00,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x0E,0x00,0x00,0x00,0x00,0x7D,0x80,0x00,0x60,0x00,0x00,0x0F,0xB0,0x00,0x00,0x38, 0x00,0x00,0x01,0x80,0x00,0x00,0x00,0x00,0x1C,0x00,0x00,0x00,0x00,0xD9,0x98,0xC7, 0x66,0x38,0x00,0x1B,0x31,0xB8,0x3B,0x39,0x8C,0x70,0x61,0x80,0x00,0x00,0x00,0x00, 0x38,0x00,0x00,0x00,0x00,0xDD,0xB1,0x8D,0xCC,0x7E,0x00,0x1B,0xB3,0xEC,0x6E,0x73, 0x18,0xD9,0xF3,0xC0,0x00,0x00,0x00,0x00,0x70,0x00,0x00,0x00,0x00,0xFF,0x31,0x98, 0xCC,0xF6,0x00,0x1F,0xE7,0xCC,0xC6,0x63,0x19,0x99,0xE6,0xC0,0x00,0x00,0x00,0x01, 0x60,0x00,0x00,0x00,0x00,0xEF,0x63,0x31,0xD9,0xBC,0x00,0x1D,0xED,0x99,0x8E,0xC6, 0x33,0x1B,0x6C,0xC0,0x00,0x00,0x00,0x03,0x40,0x00,0x00,0x00,0x00,0xCF,0x67,0x71, 0x99,0xBD,0x80,0x19,0xE3,0x33,0x8C,0xCE,0x76,0x33,0xD8,0xD8,0x00,0x00,0x00,0x07, 0x00,0x00,0x00,0x00,0x01,0xCE,0xC6,0x63,0xB3,0x1F,0x00,0x39,0xC3,0x37,0x1D,0xDC, 0x6C,0x67,0x99,0xB0,0x00,0x00,0x00,0x0E,0x00,0x00,0x00,0x00,0x03,0x6E,0xCE,0xE7, 0x77,0x18,0x00,0x6D,0xC6,0x67,0x3B,0x9C,0xD8,0x6F,0x31,0xB0,0x00,0x00,0x00,0x1C, 0x00,0x00,0x00,0x00,0x06,0x7E,0xFD,0xE7,0xFF,0x30,0x00,0xCF,0xC6,0x7F,0x3F,0xFF, 0xF1,0xFE,0x63,0xE0,0x00,0x00,0x00,0x38,0x00,0x00,0x00,0x00,0x1C,0x1E,0xE7,0x3F, 0xB9,0xE0,0x03,0x83,0xC0,0x31,0xFC,0xCF,0xE3,0x63,0xC1,0x80,0x00,0x00,0x00,0x71, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, 0x83,0xC0,0x00,0x00,0x00,0x00,0x00,0xE3,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x03,0x80,0x00,0x00,0x00,0x00,0x01,0xC7, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F, 0x07,0x00,0x00,0x00,0x00,0x00,0x03,0x8E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1E,0x0F,0x00,0x00,0x00,0x00,0x00,0x07,0x1C, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1E, 0x0F,0x00,0x00,0x00,0x00,0x00,0x0E,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x1E,0x00,0x00,0x00,0x00,0x00,0x1C,0x71, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x78, 0x36,0x00,0x00,0x00,0x00,0x00,0x38,0xE3,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x78,0x3C,0x00,0x00,0x00,0x00,0x00,0x71,0xC7, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0, 0x78,0x00,0x00,0x00,0x00,0x00,0xE3,0x8E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xC7,0x1C }; const unsigned char power_on_1[]= { /*------------------------------------------------------------------------------ ; 源文件 / 文字 : 音频信号分析仪 ; 宽×高（像素）: 192×32 ------------------------------------------------------------------------------*/ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x38,0x00,0x00, 0x00,0x30,0x00,0x00,0x3C,0x00,0x01,0xC0,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x07,0x00,0x00,0x38,0x07,0x80,0x18,0x38,0x00,0x0F,0xFE,0x00,0x00,0xE0, 0x00,0x03,0x00,0x60,0x01,0x80,0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x30,0xFF,0xC0, 0x38,0x18,0x00,0x0E,0x18,0x00,0x00,0x70,0x00,0x06,0x00,0xE0,0x03,0x98,0xC0,0x00, 0x00,0x00,0x0F,0xE0,0x03,0x3E,0x30,0x00,0x70,0x00,0x00,0x0E,0x30,0x00,0x06,0x30, 0x00,0x06,0x03,0x80,0x07,0x1C,0xE0,0x00,0x00,0x01,0xF9,0x80,0x03,0xF8,0x70,0x00, 0x60,0x3F,0xC0,0x0C,0x30,0x00,0x07,0x38,0x00,0x06,0x3E,0x00,0x0E,0x1C,0xC0,0x00, 0x00,0x00,0x03,0x80,0x03,0x60,0x6C,0x00,0xDF,0xE0,0x00,0x0F,0xF0,0x00,0x0E,0x1C, 0x00,0x0D,0xB0,0x00,0x0C,0x19,0xC0,0x00,0x00,0x00,0x63,0x00,0x03,0x63,0xFE,0x01, 0xC0,0x00,0x00,0x0C,0x00,0x00,0x1C,0x1E,0x00,0x3F,0x70,0x00,0x18,0x01,0x80,0x00, 0x00,0x00,0x66,0x00,0x07,0xFB,0x0C,0x03,0xC0,0x38,0x00,0x00,0x1F,0x80,0x38,0x0F, 0x01,0xFC,0x63,0xF8,0x39,0xC3,0x80,0x00,0x00,0x00,0x0F,0xFE,0x3F,0xC6,0xCC,0x07, 0x87,0xE0,0x00,0x1F,0xFF,0x80,0x70,0x0F,0xC0,0x38,0x7E,0x00,0x78,0xC7,0x00,0x00, 0x00,0x01,0xF8,0x00,0x00,0xF6,0xDC,0x1D,0x80,0x00,0x0F,0xFE,0x00,0x00,0xC0,0x07, 0xF0,0x78,0xE7,0x00,0xD8,0x66,0x00,0x00,0x00,0xFF,0x00,0x00,0x0D,0xB6,0xD8,0x31, 0x80,0xF0,0x00,0x1C,0x00,0x03,0x83,0xF0,0x00,0xFE,0xC6,0x01,0x98,0x6C,0x00,0x00, 0x00,0x00,0x0E,0x00,0x0D,0xED,0x98,0x63,0x0F,0xC0,0x00,0x19,0xC0,0x06,0x7E,0x70, 0x01,0xF1,0xCE,0x03,0x30,0x38,0x00,0x00,0x00,0x07,0xFF,0x00,0x1B,0xED,0xB8,0x03, 0x00,0x00,0x00,0x7F,0xE0,0x1C,0x1C,0x60,0x03,0xB1,0x8C,0x0E,0x30,0x38,0x00,0x00, 0x00,0x07,0x06,0x00,0x01,0xDB,0x30,0x03,0x00,0xE0,0x00,0x61,0xC0,0x00,0x38,0xE0, 0x06,0x63,0x0C,0x00,0x70,0x78,0x00,0x00,0x00,0x06,0x06,0x00,0x03,0x9F,0x30,0x06, 0x3F,0xF0,0x00,0x01,0xC0,0x00,0x70,0xC0,0x0C,0x66,0x1C,0x00,0x60,0xDC,0x00,0x00, 0x00,0x07,0xEE,0x00,0x06,0x07,0x80,0x06,0x38,0x60,0x00,0x03,0x80,0x00,0xE1,0xC0, 0x18,0xEC,0x18,0x00,0x63,0x9E,0x00,0x00,0x00,0x06,0x0C,0x00,0x1C,0x1C,0xE0,0x0E, 0x30,0xC0,0x00,0x03,0x80,0x01,0xC3,0x80,0x00,0xD8,0x18,0x00,0xCE,0x0F,0x80,0x00, 0x00,0x0C,0x1C,0x00,0x30,0x30,0xE0,0x0C,0x33,0xC0,0x00,0x07,0x00,0x03,0x03,0x00, 0x00,0xC0,0x38,0x00,0xF8,0x0F,0xE0,

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