利用STC12C5A60S2单片机实现音频信号的频谱显示（在LCD上显示） 思路：外来音频信号经过51单片机，在单片机中进行频谱分析，并将结果显示在LCD(12864或1602)上 要求：频谱显示如同千千静听播放音乐时的频谱显示 希望各位高手能给出详细的解决方案，感激。。。。。。 51做 FFT有些困难，可以使用增强型（RAM）的51机子进行 参考程序： #include #define uchar unsigned char #define uint unsigned int #define channel 0x01 //设置 AD通道为 P1.1 //--------------------------------------------------------------------- sbit SDA_R=P1^2; sbit SDA_R_TOP=P1^3; sbit SDA_G=P1^4; sbit SDA_G_TOP=P1^5; sbit STCP=P1^6; sbit SHCP=P1^7; //--------------------------------------------------------------------- //---------------------------------------------------------------------------------------------------------------------- //放大 128倍后的sin整数表（128） code char SIN_TAB[128] = { 0, 6, 12, 18, 24, 30, 36, 42, 48, 54, 59, 65, 70, 75, 80, 85, 89, 94, 98, 102, 105, 108, 112, 114, 117, 119, 121, 123, 124, 125, 126, 126, 126, 126, 126, 125, 124, 123, 121, 119, 117, 114, 112, 108, 105, 102, 98, 94, 89, 85, 80, 75, 70, 65, 59, 54, 48, 42, 36, 30, 24, 18, 12, 6, 0, -6, -12, -18, -24, -30, -36, -42, -48, -54, -59, -65, -70, -75, -80, -85, -89, -94, -98, -102, -105, -108, -112, -114, -117, -119, -121, -123, -124, -125, -126, -126, -126, -126, -126, -125, -124, -123, -121, -119, -117, -114, -112, -108, -105, -102, -98, -94, -89, -85, -80, -75, -70, -65, -59, -54, -48, -42, -36, -30, -24, -18, -12, -6 }; //放大128倍后的 cos整数表（128） code char COS_TAB[128] = { 127, 126, 126, 125, 124, 123, 121, 119, 117, 114, 112, 108, 105, 102, 98, 94, 89, 85, 80, 75, 70, 65, 59, 54, 48, 42, 36, 30, 24, 18, 12, 6, 0, -6, -12, -18, -24, -30, -36, -42, -48, -54, -59, -65, -70, -75, -80, -85, -89, ...
