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  1. /* Audio Library for Teensy 3.X
  2. * Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
  3. *
  4. * Development of this audio library was funded by PJRC.COM, LLC by sales of
  5. * Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
  6. * open source software by purchasing Teensy or other PJRC products.
  7. *
  8. * Permission is hereby granted, free of charge, to any person obtaining a copy
  9. * of this software and associated documentation files (the "Software"), to deal
  10. * in the Software without restriction, including without limitation the rights
  11. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12. * copies of the Software, and to permit persons to whom the Software is
  13. * furnished to do so, subject to the following conditions:
  14. *
  15. * The above copyright notice, development funding notice, and this permission
  16. * notice shall be included in all copies or substantial portions of the Software.
  17. *
  18. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24. * THE SOFTWARE.
  25. */
  26. #ifndef output_i2s_h_
  27. #define output_i2s_h_
  28. #include <Arduino.h>
  29. #include <AudioStream.h>
  30. #include <DMAChannel.h>
  31. #if !defined(KINETISL)
  32. class AudioOutputI2S : public AudioStream
  33. {
  34. public:
  35. AudioOutputI2S(void) : AudioStream(2, inputQueueArray) { begin(); }
  36. virtual void update(void);
  37. void begin(void);
  38. friend class AudioInputI2S;
  39. #if defined(__IMXRT1062__)
  40. friend class AudioOutputI2SQuad;
  41. friend class AudioInputI2SQuad;
  42. friend class AudioOutputI2SHex;
  43. friend class AudioInputI2SHex;
  44. friend class AudioOutputI2SOct;
  45. friend class AudioInputI2SOct;
  46. #endif
  47. protected:
  48. AudioOutputI2S(int dummy): AudioStream(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !!
  49. static void config_i2s(void);
  50. static audio_block_t *block_left_1st;
  51. static audio_block_t *block_right_1st;
  52. static bool update_responsibility;
  53. static DMAChannel dma;
  54. static void isr(void);
  55. private:
  56. static audio_block_t *block_left_2nd;
  57. static audio_block_t *block_right_2nd;
  58. static uint16_t block_left_offset;
  59. static uint16_t block_right_offset;
  60. audio_block_t *inputQueueArray[2];
  61. };
  62. class AudioOutputI2Sslave : public AudioOutputI2S
  63. {
  64. public:
  65. AudioOutputI2Sslave(void) : AudioOutputI2S(0) { begin(); } ;
  66. void begin(void);
  67. friend class AudioInputI2Sslave;
  68. friend void dma_ch0_isr(void);
  69. protected:
  70. static void config_i2s(void);
  71. };
  72. #elif defined(KINETISL)
  73. /**************************************************************************************
  74. * Teensy LC
  75. ***************************************************************************************/
  76. class AudioOutputI2S : public AudioStream
  77. {
  78. public:
  79. AudioOutputI2S(void) : AudioStream(2, inputQueueArray) { begin(); }
  80. virtual void update(void);
  81. void begin(void);
  82. friend class AudioInputI2S;
  83. protected:
  84. AudioOutputI2S(int dummy): AudioStream(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !!
  85. static void config_i2s(void);
  86. static audio_block_t *block_left;
  87. static audio_block_t *block_right;
  88. static bool update_responsibility;
  89. static DMAChannel dma1;
  90. static DMAChannel dma2;
  91. static void isr1(void);
  92. static void isr2(void);
  93. private:
  94. audio_block_t *inputQueueArray[2];
  95. };
  96. class AudioOutputI2Sslave : public AudioOutputI2S
  97. {
  98. public:
  99. AudioOutputI2Sslave(void) : AudioOutputI2S(0) { begin(); } ;
  100. void begin(void);
  101. friend class AudioInputI2Sslave;
  102. friend void dma_ch0_isr(void);
  103. friend void dma_ch1_isr(void);
  104. protected:
  105. static void config_i2s(void);
  106. };
  107. #endif
  108. #endif