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teensy-audio/output_i2s_quad.h

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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. 

  27. #ifndef output_i2s_quad_h_

  28. #define output_i2s_quad_h_

  29. 

  30. #include "Arduino.h"

  31. #include "AudioStream.h"

  32. #include "DMAChannel.h"

  33. 

  34. class AudioOutputI2SQuad : public AudioStream

  35. {

  36. public:

  37. 	AudioOutputI2SQuad(void) : AudioStream(4, inputQueueArray) { begin(); }

  38. 	virtual void update(void);

  39. 	void begin(void);

  40. 	friend class AudioInputI2SQuad;

  41. private:

  42. 	static void config_i2s(void);

  43. 	static audio_block_t *block_ch1_1st;

  44. 	static audio_block_t *block_ch2_1st;

  45. 	static audio_block_t *block_ch3_1st;

  46. 	static audio_block_t *block_ch4_1st;

  47. 	static bool update_responsibility;

  48. 	static DMAChannel dma;

  49. 	static void isr(void);

  50. 	static audio_block_t *block_ch1_2nd;

  51. 	static audio_block_t *block_ch2_2nd;

  52. 	static audio_block_t *block_ch3_2nd;

  53. 	static audio_block_t *block_ch4_2nd;

  54. 	static uint16_t ch1_offset;

  55. 	static uint16_t ch2_offset;

  56. 	static uint16_t ch3_offset;

  57. 	static uint16_t ch4_offset;

  58. 	audio_block_t *inputQueueArray[4];

  59. };

  60. 

  61. #endif