Kenji Arai / Mbed OS DISCO-F769NI_several_example

Several examples run on only mbed-os5.13.0 (not 5.14.0)

Dependencies:   BD_SD_DISCO_F769NI BSP_DISCO_F769NI LCD_DISCO_F769NI TS_DISCO_F769NI USBHost_F769NI

z_example/8_audio.cpp@3:35ac9ee7d2d6, 2019-08-07 (annotated)

Committer:
kenjiArai
Date:
Wed Aug 07 05:39:01 2019 +0000
Revision:
3:35ac9ee7d2d6
1st trial revision (Not finalized yet)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 3:35ac9ee7d2d6 1 // Original
kenjiArai 3:35ac9ee7d2d6 2 // https://os.mbed.com/teams/ST/code/DISCO-F769NI_AUDIO_demo/
kenjiArai 3:35ac9ee7d2d6 3 //
kenjiArai 3:35ac9ee7d2d6 4 // Modified by K.Arai
kenjiArai 3:35ac9ee7d2d6 5 // July 23rd, 2019
kenjiArai 3:35ac9ee7d2d6 6 //
kenjiArai 3:35ac9ee7d2d6 7
kenjiArai 3:35ac9ee7d2d6 8 #include "select_program.h"
kenjiArai 3:35ac9ee7d2d6 9 //#define EXAMPLE_8_AUDIO
kenjiArai 3:35ac9ee7d2d6 10 #ifdef EXAMPLE_8_AUDIO
kenjiArai 3:35ac9ee7d2d6 11
kenjiArai 3:35ac9ee7d2d6 12 #include "mbed.h"
kenjiArai 3:35ac9ee7d2d6 13 #include "stm32f769i_discovery.h"
kenjiArai 3:35ac9ee7d2d6 14 #include "stm32f769i_discovery_audio.h"
kenjiArai 3:35ac9ee7d2d6 15
kenjiArai 3:35ac9ee7d2d6 16 Serial pc(USBTX, USBRX, 115200);
kenjiArai 3:35ac9ee7d2d6 17
kenjiArai 3:35ac9ee7d2d6 18 static void CopyBuffer(int16_t *pbuffer1, int16_t *pbuffer2, uint16_t BufferSize);
kenjiArai 3:35ac9ee7d2d6 19
kenjiArai 3:35ac9ee7d2d6 20 #define SCRATCH_BUFF_SIZE 1024
kenjiArai 3:35ac9ee7d2d6 21 #define RECORD_BUFFER_SIZE 4096
kenjiArai 3:35ac9ee7d2d6 22
kenjiArai 3:35ac9ee7d2d6 23 typedef enum {
kenjiArai 3:35ac9ee7d2d6 24 BUFFER_OFFSET_NONE = 0,
kenjiArai 3:35ac9ee7d2d6 25 BUFFER_OFFSET_HALF = 1,
kenjiArai 3:35ac9ee7d2d6 26 BUFFER_OFFSET_FULL = 2,
kenjiArai 3:35ac9ee7d2d6 27 } BUFFER_StateTypeDef;
kenjiArai 3:35ac9ee7d2d6 28
kenjiArai 3:35ac9ee7d2d6 29 volatile uint32_t audio_rec_buffer_state = BUFFER_OFFSET_NONE;
kenjiArai 3:35ac9ee7d2d6 30 int32_t Scratch[SCRATCH_BUFF_SIZE];
kenjiArai 3:35ac9ee7d2d6 31
kenjiArai 3:35ac9ee7d2d6 32 /* Buffer containing the PCM samples coming from the microphone */
kenjiArai 3:35ac9ee7d2d6 33 int16_t RecordBuffer[RECORD_BUFFER_SIZE];
kenjiArai 3:35ac9ee7d2d6 34
kenjiArai 3:35ac9ee7d2d6 35 /* Buffer used to stream the recorded PCM samples towards the audio codec. */
kenjiArai 3:35ac9ee7d2d6 36 int16_t PlaybackBuffer[RECORD_BUFFER_SIZE];
kenjiArai 3:35ac9ee7d2d6 37
kenjiArai 3:35ac9ee7d2d6 38 int main()
kenjiArai 3:35ac9ee7d2d6 39 {
kenjiArai 3:35ac9ee7d2d6 40 uint32_t audio_loop_back_init = RESET ;
kenjiArai 3:35ac9ee7d2d6 41
kenjiArai 3:35ac9ee7d2d6 42 printf("\n\nAUDIO LOOPBACK EXAMPLE FOR DISCO-F769NI START:\n");
kenjiArai 3:35ac9ee7d2d6 43
kenjiArai 3:35ac9ee7d2d6 44 /* Initialize Audio Recorder with 4 channels to be used */
kenjiArai 3:35ac9ee7d2d6 45 if (BSP_AUDIO_IN_Init(BSP_AUDIO_FREQUENCY_44K, DEFAULT_AUDIO_IN_BIT_RESOLUTION, 2*DEFAULT_AUDIO_IN_CHANNEL_NBR) == AUDIO_ERROR) {
kenjiArai 3:35ac9ee7d2d6 46 printf("BSP_AUDIO_IN_Init error\n");
kenjiArai 3:35ac9ee7d2d6 47 }
kenjiArai 3:35ac9ee7d2d6 48
kenjiArai 3:35ac9ee7d2d6 49 /* Allocate scratch buffers */
kenjiArai 3:35ac9ee7d2d6 50 if (BSP_AUDIO_IN_AllocScratch (Scratch, SCRATCH_BUFF_SIZE) == AUDIO_ERROR) {
kenjiArai 3:35ac9ee7d2d6 51 printf("BSP_AUDIO_IN_AllocScratch error\n");
kenjiArai 3:35ac9ee7d2d6 52 }
kenjiArai 3:35ac9ee7d2d6 53
kenjiArai 3:35ac9ee7d2d6 54 /* Start Recording */
kenjiArai 3:35ac9ee7d2d6 55 if (BSP_AUDIO_IN_Record((uint16_t*)&RecordBuffer[0], RECORD_BUFFER_SIZE) == AUDIO_ERROR) {
kenjiArai 3:35ac9ee7d2d6 56 printf("BSP_AUDIO_IN_Record error\n");
kenjiArai 3:35ac9ee7d2d6 57 }
kenjiArai 3:35ac9ee7d2d6 58 uint8_t ChannelNumber = BSP_AUDIO_IN_GetChannelNumber();
kenjiArai 3:35ac9ee7d2d6 59
kenjiArai 3:35ac9ee7d2d6 60 audio_rec_buffer_state = BUFFER_OFFSET_NONE;
kenjiArai 3:35ac9ee7d2d6 61
kenjiArai 3:35ac9ee7d2d6 62 while (1) {
kenjiArai 3:35ac9ee7d2d6 63 /* 1st or 2nd half of the record buffer ready for being copied to the playbakc buffer */
kenjiArai 3:35ac9ee7d2d6 64 if(audio_rec_buffer_state != BUFFER_OFFSET_NONE) {
kenjiArai 3:35ac9ee7d2d6 65 /* Copy half of the record buffer to the playback buffer */
kenjiArai 3:35ac9ee7d2d6 66 if(audio_rec_buffer_state == BUFFER_OFFSET_HALF) {
kenjiArai 3:35ac9ee7d2d6 67 CopyBuffer(&PlaybackBuffer[0], &RecordBuffer[0], RECORD_BUFFER_SIZE/2);
kenjiArai 3:35ac9ee7d2d6 68 if (audio_loop_back_init == RESET) {
kenjiArai 3:35ac9ee7d2d6 69 /* Initialize the audio device*/
kenjiArai 3:35ac9ee7d2d6 70 if (BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_HEADPHONE, 70, BSP_AUDIO_FREQUENCY_44K) == AUDIO_ERROR) {
kenjiArai 3:35ac9ee7d2d6 71 printf("BSP_AUDIO_OUT_Init error\n");
kenjiArai 3:35ac9ee7d2d6 72 }
kenjiArai 3:35ac9ee7d2d6 73 if(ChannelNumber > 2) {
kenjiArai 3:35ac9ee7d2d6 74 BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_0123);
kenjiArai 3:35ac9ee7d2d6 75 } else {
kenjiArai 3:35ac9ee7d2d6 76 BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_02);
kenjiArai 3:35ac9ee7d2d6 77 }
kenjiArai 3:35ac9ee7d2d6 78
kenjiArai 3:35ac9ee7d2d6 79 /* Play the recorded buffer */
kenjiArai 3:35ac9ee7d2d6 80 if (BSP_AUDIO_OUT_Play((uint16_t *) &PlaybackBuffer[0], 2*RECORD_BUFFER_SIZE) == AUDIO_ERROR) {
kenjiArai 3:35ac9ee7d2d6 81 printf("BSP_AUDIO_OUT_Play error\n");
kenjiArai 3:35ac9ee7d2d6 82 }
kenjiArai 3:35ac9ee7d2d6 83 /* Audio device is initialized only once */
kenjiArai 3:35ac9ee7d2d6 84 audio_loop_back_init = SET;
kenjiArai 3:35ac9ee7d2d6 85 }
kenjiArai 3:35ac9ee7d2d6 86
kenjiArai 3:35ac9ee7d2d6 87
kenjiArai 3:35ac9ee7d2d6 88 } else { /* if(audio_rec_buffer_state == BUFFER_OFFSET_FULL)*/
kenjiArai 3:35ac9ee7d2d6 89 CopyBuffer(&PlaybackBuffer[RECORD_BUFFER_SIZE/2], &RecordBuffer[RECORD_BUFFER_SIZE/2], RECORD_BUFFER_SIZE/2);
kenjiArai 3:35ac9ee7d2d6 90 }
kenjiArai 3:35ac9ee7d2d6 91
kenjiArai 3:35ac9ee7d2d6 92 /* Wait for next data */
kenjiArai 3:35ac9ee7d2d6 93 audio_rec_buffer_state = BUFFER_OFFSET_NONE;
kenjiArai 3:35ac9ee7d2d6 94 }
kenjiArai 3:35ac9ee7d2d6 95 }
kenjiArai 3:35ac9ee7d2d6 96 }
kenjiArai 3:35ac9ee7d2d6 97
kenjiArai 3:35ac9ee7d2d6 98 /*-------------------------------------------------------------------------------------
kenjiArai 3:35ac9ee7d2d6 99 Callbacks implementation:
kenjiArai 3:35ac9ee7d2d6 100 the callbacks API are defined __weak in the stm32f769i_discovery_audio.c file
kenjiArai 3:35ac9ee7d2d6 101 and their implementation should be done in the user code if they are needed.
kenjiArai 3:35ac9ee7d2d6 102 Below some examples of callback implementations.
kenjiArai 3:35ac9ee7d2d6 103 -------------------------------------------------------------------------------------*/
kenjiArai 3:35ac9ee7d2d6 104 /**
kenjiArai 3:35ac9ee7d2d6 105 * @brief Manages the DMA Transfer complete interrupt.
kenjiArai 3:35ac9ee7d2d6 106 * @param None
kenjiArai 3:35ac9ee7d2d6 107 * @retval None
kenjiArai 3:35ac9ee7d2d6 108 */
kenjiArai 3:35ac9ee7d2d6 109 void BSP_AUDIO_IN_TransferComplete_CallBack(void)
kenjiArai 3:35ac9ee7d2d6 110 {
kenjiArai 3:35ac9ee7d2d6 111 audio_rec_buffer_state = BUFFER_OFFSET_FULL;
kenjiArai 3:35ac9ee7d2d6 112 }
kenjiArai 3:35ac9ee7d2d6 113
kenjiArai 3:35ac9ee7d2d6 114 /**
kenjiArai 3:35ac9ee7d2d6 115 * @brief Manages the DMA Half Transfer complete interrupt.
kenjiArai 3:35ac9ee7d2d6 116 * @param None
kenjiArai 3:35ac9ee7d2d6 117 * @retval None
kenjiArai 3:35ac9ee7d2d6 118 */
kenjiArai 3:35ac9ee7d2d6 119 void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
kenjiArai 3:35ac9ee7d2d6 120 {
kenjiArai 3:35ac9ee7d2d6 121 audio_rec_buffer_state = BUFFER_OFFSET_HALF;
kenjiArai 3:35ac9ee7d2d6 122 }
kenjiArai 3:35ac9ee7d2d6 123
kenjiArai 3:35ac9ee7d2d6 124 /**
kenjiArai 3:35ac9ee7d2d6 125 * @brief Audio IN Error callback function.
kenjiArai 3:35ac9ee7d2d6 126 * @param None
kenjiArai 3:35ac9ee7d2d6 127 * @retval None
kenjiArai 3:35ac9ee7d2d6 128 */
kenjiArai 3:35ac9ee7d2d6 129 void BSP_AUDIO_IN_Error_CallBack(void)
kenjiArai 3:35ac9ee7d2d6 130 {
kenjiArai 3:35ac9ee7d2d6 131 printf("BSP_AUDIO_IN_Error_CallBack\n");
kenjiArai 3:35ac9ee7d2d6 132 }
kenjiArai 3:35ac9ee7d2d6 133
kenjiArai 3:35ac9ee7d2d6 134
kenjiArai 3:35ac9ee7d2d6 135 /**
kenjiArai 3:35ac9ee7d2d6 136 * @brief Copy content of pbuffer2 to pbuffer1
kenjiArai 3:35ac9ee7d2d6 137 * @param None
kenjiArai 3:35ac9ee7d2d6 138 * @retval None
kenjiArai 3:35ac9ee7d2d6 139 */
kenjiArai 3:35ac9ee7d2d6 140 static void CopyBuffer(int16_t *pbuffer1, int16_t *pbuffer2, uint16_t BufferSize)
kenjiArai 3:35ac9ee7d2d6 141 {
kenjiArai 3:35ac9ee7d2d6 142 uint32_t i = 0;
kenjiArai 3:35ac9ee7d2d6 143 for(i = 0; i < BufferSize; i++) {
kenjiArai 3:35ac9ee7d2d6 144 pbuffer1[i] = pbuffer2[i];
kenjiArai 3:35ac9ee7d2d6 145 }
kenjiArai 3:35ac9ee7d2d6 146 }
kenjiArai 3:35ac9ee7d2d6 147
kenjiArai 3:35ac9ee7d2d6 148 #endif