romsin.h

电赛一等奖作品：音频信号分析仪单片机源码

unsigned char GetRect(unsigned int i)
{
	
	if( i>=502 && i<522) 
	   return (float)(i-502)*255/20;
	if (i<10)
	   return (float)(10-i)*128/10;
	if(i>=1014)
	   return (float)(1024-i)*128/10+127;
	
	
	if(i>=512)
		return 255;
	else
		return 0;
}
unsigned char GetTri(unsigned int i)
{
	if(i<256)
		return (128+i/2);

	else if(i<768)
		return (767-i)>>1;
	else
		return (i-768)>>1;
}
unsigned char GetSaw(unsigned int i)
{
	return i>>2;
}
code const unsigned char Sin[]={
128,128,129,130,131,131,132,133,134,135,135,
136,137,138,138,139,140,141,142,142,143,
144,145,146,146,147,148,149,149,150,151,
152,152,153,154,155,156,156,157,158,159,
159,160,161,162,162,163,164,165,165,166,
167,168,168,169,170,171,171,172,173,174,
174,175,176,176,177,178,179,179,180,181,
182,182,183,184,184,185,186,186,187,188,
189,189,190,191,191,192,193,193,194,195,
195,196,197,197,198,199,199,200,201,201,
202,202,203,204,204,205,206,206,207,207,
208,209,209,210,211,211,212,212,213,213,
214,215,215,216,216,217,217,218,219,219,
220,220,221,221,222,222,223,223,224,224,
225,225,226,226,227,227,228,228,229,229,
230,230,231,231,232,232,233,233,233,234,
234,235,235,236,236,236,237,237,238,238,
238,239,239,240,240,240,241,241,241,242,
242,243,243,243,244,244,244,245,245,245,
245,246,246,246,247,247,247,247,248,248,
248,249,249,249,249,250,250,250,250,250,
251,251,251,251,251,252,252,252,252,252,
253,253,253,253,253,253,253,254,254,254,
254,254,254,254,254,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,254,254,254,254,
254,254,254,254,253,253,253,253,253,253,
253,252,252,252,252,252,251,251,251,251,
251,250,250,250,250,250,249,249,249,249,
248,248,248,247,247,247,247,246,246,246,
245,245,245,245,244,244,244,243,243,243,
242,242,241,241,241,240,240,240,239,239,
238,238,238,237,237,236,236,236,235,235,
234,234,233,233,233,232,232,231,231,230,
230,229,229,228,228,227,227,226,226,225,
225,224,224,223,223,222,222,221,221,220,
220,219,219,218,217,217,216,216,215,215,
214,213,213,212,212,211,211,210,209,209,
208,207,207,206,206,205,204,204,203,202,
202,201,201,200,199,199,198,197,197,196,
195,195,194,193,193,192,191,191,190,189,
189,188,187,186,186,185,184,184,183,182,
182,181,180,179,179,178,177,176,176,175,
174,174,173,172,171,171,170,169,168,168,
167,166,165,165,164,163,162,162,161,160,
159,159,158,157,156,156,155,154,153,152,
152,151,150,149,149,148,147,146,146,145,
144,143,142,142,141,140,139,138,138,137,
136,135,135,134,133,132,131,131,130,129,
128,128,127,126,125,124,124,123,122,121,
120,120,119,118,117,117,116,115,114,113,
113,112,111,110,109,109,108,107,106,106,
105,104,103,103,102,101,100,99,99,98,
97,96,96,95,94,93,93,92,91,90,
90,89,88,87,87,86,85,84,84,83,
82,81,81,80,79,79,78,77,76,76,
75,74,73,73,72,71,71,70,69,69,
68,67,66,66,65,64,64,63,62,62,
61,60,60,59,58,58,57,56,56,55,
54,54,53,53,52,51,51,50,49,49,
48,48,47,46,46,45,44,44,43,43,
42,42,41,40,40,39,39,38,38,37,
36,36,35,35,34,34,33,33,32,32,
31,31,30,30,29,29,28,28,27,27,
26,26,25,25,24,24,23,23,22,22,
22,21,21,20,20,19,19,19,18,18,
17,17,17,16,16,15,15,15,14,14,
14,13,13,12,12,12,11,11,11,10,
10,10,10,9,9,9,8,8,8,8,
7,7,7,6,6,6,6,5,5,5,
5,5,4,4,4,4,4,3,3,3,
3,3,2,2,2,2,2,2,2,1,
1,1,1,1,1,1,1,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,1,1,
1,1,1,1,1,1,2,2,2,2,
2,2,2,3,3,3,3,3,4,4,
4,4,4,5,5,5,5,5,6,6,
6,6,7,7,7,8,8,8,8,9,
9,9,10,10,10,10,11,11,11,12,
12,12,13,13,14,14,14,15,15,15,
16,16,17,17,17,18,18,19,19,19,
20,20,21,21,22,22,22,23,23,24,
24,25,25,26,26,27,27,28,28,29,
29,30,30,31,31,32,32,33,33,34,
34,35,35,36,36,37,38,38,39,39,
40,40,41,42,42,43,43,44,44,45,
46,46,47,48,48,49,49,50,51,51,
52,53,53,54,54,55,56,56,57,58,
58,59,60,60,61,62,62,63,64,64,
65,66,66,67,68,69,69,70,71,71,
72,73,73,74,75,76,76,77,78,79,
79,80,81,81,82,83,84,84,85,86,
87,87,88,89,90,90,91,92,93,93,
94,95,96,96,97,98,99,99,100,101,
102,103,103,104,105,106,106,107,108,109,
109,110,111,112,113,113,114,115,116,117,
117,118,119,120,120,121,122,123,124,124,
125,126,127
};