基于单片机的正弦波设计程序幅度和频率可调

#include 									  //宏声明
#include									  
#include
#include
#define uint unsigned int							  //宏定义
#define uchar unsigned char

uchar code zhengxian[]={ 							  //正弦表
	 0x7F0x820x850x880x8B0x8F0x920x950x980x9B0x9E0xA10xA40xA70xAA0xAD
	0xB00xB30xB60xB80xBB0xBE0xC10xC30xC60xC80xCB0xCD0xD00xD20xD50xD7
	0xD90xDB0xDD0xE00xE20xE40xE50xE70xE90xEB0xEC0xEE0xEF0xF10xF20xF4
	0xF50xF60xF70xF80xF90xFA0xFB0xFB0xFC0xFD0xFD0xFE0xFE0xFE0xFE0xFE
	0xFE0xFE0xFE0xFE0xFE0xFE0xFD0xFD0xFC0xFB0xFB0xFA0xF90xF80xF70xF6
	0xF50xF40xF20xF10xEF0xEE0xEC0xEB0xE90xE70xE50xE40xE20xE00xDD0xDB
	0xD90xD70xD50xD20xD00xCD0xCB0xC80xC60xC30xC10xBE0xBB0xB80xB60xB3
	0xB00xAD0xAA0xA70xA40xA10x9E0x9B0x980x950x920x8F0x8B0x880x850x82
	0x7F0x7C0x790x760x730x6F0x6C0x690x660x630x600x5D0x5A0x570x540x51
	0x4E0x4B0x480x460x430x400x3D0x3B0x380x360x330x310x2E0x2C0x290x27
	0x250x230x210x1E0x1C0x1A0x190x170x150x130x120x100x0F0x0D0x0C0x0A
	0x090x080x070x060x050x040x030x030x020x010x010x000x000x000x000x00
	0x000x000x000x000x000x000x010x010x020x030x030x040x050x060x070x08
	0x090x0A0x0C0x0D0x0F0x100x120x130x150x170x190x1A0x1C0x1E0x210x23
	0x250x270x290x2C0x2E0x310x330x360x380x3B0x3D0x400x430x460x480x4B
	0x4E0x510x540x570x5A0x5D0x600x630x660x690x6C0x6F0x730x760x790x7C
	0x7f
};

uint code frq[]={									  //频率表
	0x67690xb3b50xcd230xd9da0xe17b0xe6920xea340xeced0xef0c
	0xf0be0xf85f0xfaea0xfc2f0xfcf30xfd750xfdd20xfe180xfe4e
	0xfe790xfefc0xff3d0xff600xff7e0xff900xff9e0xffa90xffb2
	0xffb90xffbf0xffc40xffc80xffcc0xffcf0xffd20xffd50xffd7
	0xffd90xffec0xfff30xfff60xfff80x6769
};

uchar KEY_CNT=0;								//按键消抖滤波计数
uchar tab_switch=0;						      	//数据更改选择
											
sbit KEY1=P3^5;								   	//定义按键
sbit KEY2=P3^6;
sbit KEY3=P3^7; 



uchar frq_cnt=1; 								//频率选择计数