Добавлено: 23 ноя 2010, 20:00
Trudogolik
Грубо говоря, таблица определяет скважность импульсов на выходе в соответствии с требуемым в каждый момент напряжением. Чем больше длительность импульса по отношению к периоду повторения этих импульсов, тем выше будет выходное напряжение. Дальше ставится ФНЧ и получам почти чистый синус. Вот таблицы разных сигналов из сделанного когда-то генератора.
sine: ;
.db 0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae
.db 0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8
.db 0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf5
.db 0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7
.db 0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,0xe8,0xe6,0xe4,0xe2,0xe0,0xde,0xdc
.db 0xda,0xd8,0xd5,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb3
.db 0xb0,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x98,0x95,0x92,0x8f,0x8c,0x89,0x86,0x83
.db 0x80,0x7c,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x63,0x60,0x5d,0x5a,0x57,0x54,0x51
.db 0x4f,0x4c,0x49,0x46,0x43,0x40,0x3e,0x3b,0x38,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27
.db 0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x13,0x12,0x10,0x0f,0x0d,0x0c,0x0a
.db 0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08
.db 0x09,0x0a,0x0c,0x0d,0x0f,0x10,0x12,0x13,0x15,0x17,0x19,0x1b,0x1d,0x1f,0x21,0x23
.db 0x25,0x27,0x2a,0x2c,0x2e,0x31,0x33,0x36,0x38,0x3b,0x3e,0x40,0x43,0x46,0x49,0x4c
.db 0x4f,0x51,0x54,0x57,0x5a,0x5d,0x60,0x63,0x67,0x6a,0x6d,0x70,0x73,0x76,0x79,0x7c
sawtooth: ;
.db 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
.db 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
.db 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
.db 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
.db 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
.db 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
.db 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
.db 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
.db 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
.db 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
.db 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
.db 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
.db 0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf
.db 0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf
.db 0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef
.db 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
triangle: ;
.db 0x00,0x02,0x04,0x06,0x08,0x0a,0x0c,0x0e,0x10,0x12,0x14,0x16,0x18,0x1a,0x1c,0x1e
.db 0x20,0x22,0x24,0x26,0x28,0x2a,0x2c,0x2e,0x30,0x32,0x34,0x36,0x38,0x3a,0x3c,0x3e
.db 0x40,0x42,0x44,0x46,0x48,0x4a,0x4c,0x4e,0x50,0x52,0x54,0x56,0x58,0x5a,0x5c,0x5e
.db 0x60,0x62,0x64,0x66,0x68,0x6a,0x6c,0x6e,0x70,0x72,0x74,0x76,0x78,0x7a,0x7c,0x7e
.db 0x80,0x82,0x84,0x86,0x88,0x8a,0x8c,0x8e,0x90,0x92,0x94,0x96,0x98,0x9a,0x9c,0x9e
.db 0xa0,0xa2,0xa4,0xa6,0xa8,0xaa,0xac,0xae,0xb0,0xb2,0xb4,0xb6,0xb8,0xba,0xbc,0xbe
.db 0xc0,0xc2,0xc4,0xc6,0xc8,0xca,0xcc,0xce,0xd0,0xd2,0xd4,0xd6,0xd8,0xda,0xdc,0xde
.db 0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xee,0xf0,0xf2,0xf4,0xf6,0xf8,0xfa,0xfc,0xfe
.db 0xff,0xfd,0xfb,0xf9,0xf7,0xf5,0xf3,0xf1,0xef,0xef,0xeb,0xe9,0xe7,0xe5,0xe3,0xe1
.db 0xdf,0xdd,0xdb,0xd9,0xd7,0xd5,0xd3,0xd1,0xcf,0xcf,0xcb,0xc9,0xc7,0xc5,0xc3,0xc1
.db 0xbf,0xbd,0xbb,0xb9,0xb7,0xb5,0xb3,0xb1,0xaf,0xaf,0xab,0xa9,0xa7,0xa5,0xa3,0xa1
.db 0x9f,0x9d,0x9b,0x99,0x97,0x95,0x93,0x91,0x8f,0x8f,0x8b,0x89,0x87,0x85,0x83,0x81
.db 0x7f,0x7d,0x7b,0x79,0x77,0x75,0x73,0x71,0x6f,0x6f,0x6b,0x69,0x67,0x65,0x63,0x61
.db 0x5f,0x5d,0x5b,0x59,0x57,0x55,0x53,0x51,0x4f,0x4f,0x4b,0x49,0x47,0x45,0x43,0x41
.db 0x3f,0x3d,0x3b,0x39,0x37,0x35,0x33,0x31,0x2f,0x2f,0x2b,0x29,0x27,0x25,0x23,0x21
.db 0x1f,0x1d,0x1b,0x19,0x17,0x15,0x13,0x11,0x0f,0x0f,0x0b,0x09,0x07,0x05,0x03,0x01
square: ;
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
.db 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
noise: ;
.db 0x02,0x17,0xa3,0x11,0x78,0x3f,0x01,0x22,0x74,0x91,0x00,0x11,0x32,0x9d,0x3f,0x9a
.db 0xff,0xc1,0x1e,0x7f,0x10,0x06,0x01,0x3f,0x69,0x28,0x8f,0x3e,0x1f,0x56,0x35,0xa1
.db 0x56,0xf1,0x02,0xcf,0x67,0x39,0xe3,0xff,0x15,0xc5,0x82,0x17,0x01,0x37,0xaf,0x91
.db 0xe4,0x31,0x01,0xb7,0xe0,0x31,0x88,0x11,0x39,0xd4,0xfd,0x54,0x88,0xff,0x41,0x91
.db 0xe3,0x61,0x99,0xfa,0x25,0x85,0x37,0x33,0x72,0x2f,0xe4,0xfe,0xd7,0x3f,0x66,0xaa
.db 0xda,0x1d,0x48,0x81,0x11,0x00,0x20,0x01,0x34,0x71,0xfa,0xcd,0xdf,0x34,0x18,0xff
.db 0x56,0x24,0x72,0xa3,0x12,0xfa,0xde,0x5f,0xf2,0x29,0x34,0xef,0x38,0x19,0x56,0x6f
.db 0x56,0xf1,0x02,0xcf,0x67,0x39,0xe3,0xff,0x15,0xc5,0x82,0x17,0x01,0x37,0xaf,0x91
.db 0xe3,0x61,0x99,0xfa,0x25,0x85,0x37,0x33,0x72,0x2f,0xe4,0xfe,0xd7,0x3f,0x66,0xaa
.db 0x02,0x17,0xa3,0x11,0x78,0x3f,0x01,0x22,0x74,0x91,0x00,0x11,0x32,0x9d,0x3f,0x9a
.db 0xe4,0x31,0x01,0xb7,0xe0,0x31,0x88,0x11,0x39,0xd4,0xfd,0x54,0x88,0xff,0x41,0x91
.db 0x56,0xf1,0x02,0xcf,0x67,0x39,0xe3,0xff,0x15,0xc5,0x82,0x17,0x01,0x37,0xaf,0x91
.db 0xff,0xc1,0x1e,0x7f,0x10,0x06,0x01,0x3f,0x69,0x28,0x8f,0x3e,0x1f,0x56,0x35,0xa1
.db 0xda,0x1d,0x48,0x81,0x11,0x00,0x20,0x01,0x34,0x71,0xfa,0xcd,0xdf,0x34,0x18,0xff
.db 0xff,0xc1,0x1e,0x7f,0x10,0x06,0x01,0x3f,0x69,0x28,0x8f,0x3e,0x1f,0x56,0x35,0xa1
.db 0x56,0x24,0x72,0xa3,0x12,0xfa,0xde,0x5f,0xf2,0x29,0x34,0xef,0x38,0x19,0x56,0x6f
Morse:
.db 0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0x00
.db 0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00
.db 0xff,0x00,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00
.db 0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00
.db 0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0x00
.db 0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00
.db 0xff,0x00,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00
.db 0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00
.db 0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0x00
.db 0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00
.db 0xff,0x00,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00
.db 0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00
.db 0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0x00
.db 0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00
.db 0xff,0x00,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0xff,0xff,0x00
.db 0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0x00
Эти таблицы обеспечивают формирование синусоиды, косинусоиды, прямой и обратной пилы, треугольной и прямоугольной форм импульса, шумоподобного сигнала и чегой то выдавал азбукой Морзе.
Генератор один, просто брались нужные коэффициенты из таблицы и формировалась в соответствии с этим значением длительность импульсов. Максимальная длительность - 256 тактов.