static const uint8_t sin_table[] = {
	0,   1,   3,   4,   6,   7,   9,  10,  12,  14,  15,  17,  18,
        20,  21,  23,  25,  26,  28,  29,  31,  32,  34,  36,  37,  39,
        40,  42,  43,  45,  46,  48,  49,  51,  53,  54,  56,  57,  59,
        60,  62,  63,  65,  66,  68,  69,  71,  72,  74,  75,  77,  78,
        80,  81,  83,  84,  86,  87,  89,  90,  92,  93,  95,  96,  97,
        99, 100, 102, 103, 105, 106, 108, 109, 110, 112, 113, 115, 116,
       117, 119, 120, 122, 123, 124, 126, 127, 128, 130, 131, 132, 134,
       135, 136, 138, 139, 140, 142, 143, 144, 146, 147, 148, 149, 151,
       152, 153, 155, 156, 157, 158, 159, 161, 162, 163, 164, 166, 167,
       168, 169, 170, 171, 173, 174, 175, 176, 177, 178, 179, 181, 182,
       183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195,
       196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208,
       209, 210, 211, 211, 212, 213, 214, 215, 216, 217, 217, 218, 219,
       220, 221, 221, 222, 223, 224, 225, 225, 226, 227, 227, 228, 229,
       230, 230, 231, 232, 232, 233, 234, 234, 235, 235, 236, 237, 237,
       238, 238, 239, 239, 240, 241, 241, 242, 242, 243, 243, 244, 244,
       244, 245, 245, 246, 246, 247, 247, 247, 248, 248, 249, 249, 249,
       250, 250, 250, 251, 251, 251, 251, 252, 252, 252, 252, 253, 253,
       253, 253, 254, 254, 254, 254, 254, 254, 255, 255, 255, 255, 255,
       255, 255, 255, 255, 255, 255, 255, 255, 255, 255}; // last should be 256

int16_t sin180(uint16_t in) {
	return in < 256 ? sin_table[in] : sin_table[512 - in];
}

int16_t isin(uint16_t in) {
	return in < 512 ? sin180(in) : -sin180(1024 - in);
}

uint8_t psin(uint16_t in) {
	return (isin(in) + 256) / 2;
}