sinx.h

本文件好似一系列的仿真

//正弦表；每半个周期256个取值,最大限度保证波形不失真。
//各个值通过MATLAB算出，并四设五如取整。具体程序如下

#ifndef __sinx_h__
#define __sinx_h__
unsigned char code sin_num[]={     
      0,0,	0,	0,	0,	0,	0,	0,	1,	1,	1,	1,	1,	2,	2,	2,
	  2,	3,	3,	4,	4,	4,	5,	5,	6,	6,	7,	7,	8,	8,	9,	9,
      10,	10,	11,	12,	12,	13,	14,	15,	15,	16,	17,	18,	18,	19,	20,	21,
	  22,	23,	24,	25,	25,	26,	27,	28,	29,	30,	31,	32,	34,	35,	36,	37,
      38,	39,	40,	41,	42,	44,	45,	46,	47,	49,	50,	51,	52,	54,	55,	56,
      57,	59,	60,	61,	63,	64,	66,	67,	68,	70,	71,	73,	74,	75,	77,	78,
 	  80,	81,	83,	84,	86,	87,	89,	90,	92,	93,	95,	96,	98,	99,	101,102,
	  104,	106,	107,	109,	110,	112,    113,	115,	116,	118,	120,	121,	123,	124,	126,	128,
	  129,	131,    132,	134,	135,    137,    139,	140,	142,	143,	145,	146,	148,    149,	151,	153,
	  154,	156,	157,	159,	160,	162,	163,	165,    166,	168,	169,	171,	172,	174,	175,	177,
	  178,	180,	181,    182,	184,	185,	187,	188,	189,	191,	192,	194,	195,	196,	198,	199,
	  200,	201,	203,	204,	205,	206,	208,	209,	210,	211,	213,	214,	215,	216,	217,	218,	
	  219,	220,	221,	223,	224,	225,	226,	227,	228,	229,	230,	230,	231,	232,	233,	234,	
	  235,	236,	237,	237,	238,	239,	240,	240,	241,	242,	243,	243,	244,	245,	245,	246,	
	  246,	247,	247,	248,	248,	249,	249,	250,	250,	251,	251,    251,	252,	252,	253,	253,	
	  253,	253,	254,	254,	254,	254,	254,	255,	255,	255,	255,    255,	255,	255,	255,	255


      };
#endif
//MATLAB程序:
//x=linspace(-pi/2,pi/2,255);%如果过采用1位采用，很多值是重的。虽然实际中并不会。
//y=(sin(x)+1)/2.0*255;
//%uint32(y)%强制类型转换。
//%fprintf('%.f\n',uint32(y));%控制输出类型
//round(y)%四舍五入函数