Simple single-color 8x8x8 LED Cube with AVRs
選択できるのは25トピックまでです。 トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。

eq.c 2.5KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109
  1. /*
  2. * eq.c
  3. *
  4. * Copyright 2012 Thomas Buck <xythobuz@me.com>
  5. *
  6. * This file is part of LED-Cube.
  7. *
  8. * LED-Cube is free software: you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License as published by
  10. * the Free Software Foundation, either version 3 of the License, or
  11. * (at your option) any later version.
  12. *
  13. * LED-Cube is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with LED-Cube. If not, see <http://www.gnu.org/licenses/>.
  20. */
  21. #include <avr/io.h>
  22. #include <stdint.h>
  23. #include <util/delay.h>
  24. #include "eq.h"
  25. #include "adc.h"
  26. #define Trs 72
  27. #define Ts 19
  28. #define To 36
  29. uint8_t result[7] = {128, 128, 128, 128, 128, 128, 128};
  30. #define RESETPORT PORTC
  31. #define STROBEPORT PORTC
  32. #define RESET PC3
  33. #define STROBE PC2
  34. #define RESETON RESETPORT |= (1 << RESET)
  35. #define RESETOFF RESETPORT &= ~(1 << RESET)
  36. #define STROBEON STROBEPORT |= (1 << STROBE)
  37. #define STROBEOFF STROBEPORT &= ~(1 << STROBE)
  38. void equalizerInit(void);
  39. uint8_t *equalizerGet(void);
  40. void calcMultiplicator(uint8_t *d);
  41. void heightenTreble(uint8_t *d);
  42. void filterNoise(uint8_t *data);
  43. uint8_t getOffset(void);
  44. void equalizerInit(void) {
  45. RESETON;
  46. STROBEOFF;
  47. }
  48. uint8_t *equalizerGet(void) {
  49. uint8_t i;
  50. RESETOFF;
  51. _delay_us(Trs);
  52. for (i = 0; i < 7; i++) {
  53. STROBEON;
  54. _delay_us(Ts);
  55. STROBEOFF;
  56. _delay_us(To); // Wait for result
  57. adcStartConversion(0);
  58. result[i] = adcGetByte();
  59. }
  60. RESETON;
  61. asm volatile ("nop"); // Ensure minimal reset pulse width
  62. asm volatile ("nop"); // 2 NOPs at 16MHz are enough...
  63. filterNoise(result); // Filter lower values
  64. heightenTreble(result); // Heighten higher frequencies, cause they seem damped
  65. // calcMultiplicator(result); // Multiply with Poti Position
  66. filterNoise(result); // Filter lower values
  67. return result;
  68. }
  69. void calcMultiplicator(uint8_t *d) {
  70. uint8_t i;
  71. uint16_t multiplicator = ((uint16_t)getOffset() + 100) / 10;
  72. for (i = 0; i < 7; i++) {
  73. d[i] = (d[i] * multiplicator) / 10;
  74. }
  75. }
  76. void heightenTreble(uint8_t *d) {
  77. d[6] = d[5] * 10 / 15; // Get practically nothing on this channel. So fake something...
  78. }
  79. void filterNoise(uint8_t *data) {
  80. uint8_t i;
  81. for (i = 0; i < 7; i++) {
  82. if (data[i] < 60) {
  83. data[i] = data[i] * 10 / 15; // / 1.5
  84. }
  85. }
  86. }
  87. uint8_t getOffset(void) {
  88. adcStartConversion(0x01);
  89. return adcGetByte();
  90. }