单片机音频显示成品
在这里要说的是，焊接并不算复杂，无非就是点阵的焊接耗时耗力，要是有点焊接功夫，小半天也足够了，焊接的时候千万不要弄断管脚，弯折的管脚做跳线最好不过（图3）。系统板的布局我建议大家紧凑一些，我自己焊接的时候是考虑到这板子以后可能加个时间显示什么的，所以预留了一些空间，这样以后再做点阵显示的时候就方便多了。
#include<stc12c5a.h>
#include<intrins.h>
#include"basic.h"
typedef unsigned char uint8;
typedef unsigned int uint16;
#define ADC_FLAG (1<<4) /*ADC_中断标志*/
/*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,
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