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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. #if defined(__IMXRT1052__) || defined(__IMXRT1062__)
  27. #ifndef output_i2s2_h_
  28. #define output_i2s2_h_
  29. #include "Arduino.h"
  30. #include "AudioStream.h"
  31. #include "DMAChannel.h"
  32. class AudioOutputI2S2 : public AudioStream
  33. {
  34. public:
  35. AudioOutputI2S2(void) : AudioStream(2, inputQueueArray) { begin(); }
  36. virtual void update(void);
  37. void begin(void);
  38. friend class AudioInputI2S2;
  39. protected:
  40. AudioOutputI2S2(int dummy): AudioStream(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !!
  41. static void config_i2s(void);
  42. static audio_block_t *block_left_1st;
  43. static audio_block_t *block_right_1st;
  44. static bool update_responsibility;
  45. static DMAChannel dma;
  46. static void isr(void);
  47. private:
  48. static audio_block_t *block_left_2nd;
  49. static audio_block_t *block_right_2nd;
  50. static uint16_t block_left_offset;
  51. static uint16_t block_right_offset;
  52. audio_block_t *inputQueueArray[2];
  53. };
  54. class AudioOutputI2S2slave : public AudioOutputI2S2
  55. {
  56. public:
  57. AudioOutputI2S2slave(void) : AudioOutputI2S2(0) { begin(); } ;
  58. void begin(void);
  59. friend class AudioInputI2S2slave;
  60. friend void dma_ch0_isr(void);
  61. protected:
  62. static void config_i2s(void);
  63. };
  64. #endif
  65. #endif //defined(__IMXRT1062__)